Release v1.0 - Feature Complete PDF Generation Library
Major features added since v0.5: - PNG support with alpha/transparency (soft masks) - FlateDecode compression via libdeflate-zig - Bookmarks/Outline for document navigation - Bezier curves, circles, ellipses, arcs - Transformations (rotate, scale, translate, skew) - Transparency/opacity (fill and stroke alpha) - Linear and radial gradients (Shading Patterns) - Code128 (1D) and QR Code (2D) barcodes - TrueType font parsing (metrics, glyph widths) - RC4 encryption module (40/128-bit) - AcroForms module (TextField, CheckBox) - SVG import (basic shapes and paths) - Template system (reusable layouts) - Markdown styling (bold, italic, links, headings, lists) Documentation: - README.md: Complete API reference with code examples - FUTURE_IMPROVEMENTS.md: Detailed roadmap for future development - CLAUDE.md: Updated to v1.0 release status Stats: - 125+ unit tests passing - 16 demo examples - 46 source files 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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CLAUDE.md
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CLAUDE.md
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@ -1,32 +1,45 @@
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# zpdf - Generador PDF para Zig
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# zpdf - Generador PDF para Zig
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> **Ultima actualizacion**: 2025-12-08
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> **Ultima actualizacion**: 2025-12-09
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> **Lenguaje**: Zig 0.15.2
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> **Lenguaje**: Zig 0.15.2
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> **Estado**: v0.5 - Clickable Links + Complete Feature Set
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> **Estado**: v1.0 - RELEASE (FEATURE COMPLETE)
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> **Fuente principal**: fpdf2 (Python) - https://github.com/py-pdf/fpdf2
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> **Fuente principal**: fpdf2 (Python) - https://github.com/py-pdf/fpdf2
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## Descripcion del Proyecto
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## Descripcion del Proyecto
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**zpdf** es una libreria pura Zig para generacion de documentos PDF. Sin dependencias externas, compila a un binario unico.
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**zpdf** es una libreria pura Zig para generacion de documentos PDF. Compila a un binario unico con minimas dependencias.
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**Filosofia**:
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**Filosofia**:
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- Zero dependencias (100% Zig puro)
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- Minimas dependencias (libdeflate para compresion)
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- API simple y directa inspirada en fpdf2
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- API simple y directa inspirada en fpdf2
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- Enfocado en generacion de facturas/documentos comerciales
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- Enfocado en generacion de facturas/documentos comerciales
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- Soporte completo: texto, tablas, imagenes, links, paginacion
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- Soporte completo: texto, tablas, imagenes, links, graficos vectoriales
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**Caracteristicas principales**:
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**Caracteristicas principales**:
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- Sistema de texto completo (cell, multiCell, alineacion, word wrap)
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- Sistema de texto completo (cell, multiCell, alineacion, word wrap)
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- 14 fuentes Type1 standard (Helvetica, Times, Courier, etc.)
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- 14 fuentes Type1 standard (Helvetica, Times, Courier, etc.)
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- Imagenes JPEG embebidas (passthrough, sin re-encoding)
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- Imagenes JPEG y PNG (con alpha/transparencia)
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- Compresion FlateDecode para streams e imagenes
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- Table helper para tablas formateadas
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- Table helper para tablas formateadas
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- Paginacion automatica (numeros de pagina, headers, footers)
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- Paginacion automatica (numeros de pagina, headers, footers)
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- Links clickeables (URLs externas + links internos entre paginas)
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- Links clickeables (URLs externas + links internos entre paginas)
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- Bookmarks/Outline para navegacion en sidebar
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- Curvas Bezier, circulos, elipses, arcos
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- Transformaciones (rotacion, escala, skew, traslacion)
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- Transparencia/Opacidad (fill y stroke alpha)
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- Gradientes lineales y radiales (Shading Patterns)
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- Barcodes: Code128 (1D) y QR Code (2D)
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- TrueType font parsing (family, metrics, glyph widths)
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- Security: RC4 encryption, permission flags
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- Forms: AcroForms (text fields, checkboxes)
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- SVG import (basic path/shape support)
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- Templates: Reusable document layouts
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- Markdown: Styled text (bold, italic, links, headings, lists)
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- Colores RGB, CMYK, Grayscale
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- Colores RGB, CMYK, Grayscale
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---
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---
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## Estado Actual - v0.5
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## Estado Actual - v1.0
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### Funcionalidades Implementadas
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### Funcionalidades Implementadas
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@ -37,6 +50,8 @@
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| | Metadatos (titulo, autor, etc.) | OK |
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| | Metadatos (titulo, autor, etc.) | OK |
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| | Multiples paginas | OK |
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| | Multiples paginas | OK |
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| | Tamanos estandar (A4, Letter, A3, A5, Legal) | OK |
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| | Tamanos estandar (A4, Letter, A3, A5, Legal) | OK |
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| | Compresion FlateDecode configurable | OK |
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| | Bookmarks/Outline | OK |
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| **Texto** | | |
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| **Texto** | | |
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| | drawText() - texto en posicion | OK |
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| | drawText() - texto en posicion | OK |
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| | cell() - celda con bordes/relleno | OK |
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| | cell() - celda con bordes/relleno | OK |
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| **Graficos** | | |
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| **Graficos** | | |
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| | Lineas | OK |
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| | Lineas | OK |
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| | Rectangulos (stroke, fill) | OK |
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| | Rectangulos (stroke, fill) | OK |
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| | Curvas Bezier (cubicas, cuadraticas) | OK |
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| | Circulos y elipses | OK |
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| | Arcos | OK |
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| | Colores RGB/CMYK/Gray | OK |
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| | Colores RGB/CMYK/Gray | OK |
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| **Transformaciones** | | |
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| | Rotacion (alrededor de punto) | OK |
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| | Escala (desde punto) | OK |
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| | Traslacion | OK |
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| | Skew/Shear | OK |
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| | Matriz personalizada | OK |
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| | saveState()/restoreState() | OK |
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| **Transparencia** | | |
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| | Fill opacity (0.0-1.0) | OK |
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| | Stroke opacity (0.0-1.0) | OK |
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| | ExtGState resources | OK |
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| **Gradientes** | | |
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| | Linear gradients (horizontal, vertical, diagonal) | OK |
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| | Radial gradients (circle, ellipse) | OK |
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| | Shading Patterns (Type 2, Type 3) | OK |
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| **Barcodes** | | |
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| | Code128 (1D barcode) | OK |
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| | QR Code (2D barcode) | OK |
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| | Error correction levels (L, M, Q, H) | OK |
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| | drawCode128() / drawCode128WithText() | OK |
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| | drawQRCode() | OK |
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| **TrueType Fonts** | | |
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| | TTF file parsing | OK |
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| | Font metrics (ascender, descender, etc.) | OK |
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| | Glyph widths | OK |
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| | Character to glyph mapping (cmap) | OK |
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| | addTtfFontFromFile() | OK |
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| **Security** | | |
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| | RC4 cipher (40/128-bit) | OK |
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| | User/Owner passwords | OK |
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| | Permission flags | OK |
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| | MD5 key derivation | OK |
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| | Encryption module | OK |
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| **Forms** | | |
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| | TextField | OK |
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| | CheckBox | OK |
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| | Field flags | OK |
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| | AcroForm basics | OK |
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| **SVG** | | |
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| | Path parsing | OK |
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| | Basic shapes (rect, circle, ellipse, line) | OK |
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| | Colors (fill, stroke) | OK |
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| | PDF content generation | OK |
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| **Templates** | | |
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| | Template struct | OK |
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| | Named regions | OK |
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| | Fixed content | OK |
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| | invoiceTemplate() | OK |
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| | letterTemplate() | OK |
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| **Markdown** | | |
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| | Bold (**text**) | OK |
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| | Italic (*text*) | OK |
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| | Bold+Italic (***text***) | OK |
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| | Strikethrough (~~text~~) | OK |
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| | Links ([text](url)) | OK |
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| | Headings (#, ##, ###) | OK |
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| | Bullet lists (- item) | OK |
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| | Numbered lists (1. item) | OK |
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| **Imagenes** | | |
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| **Imagenes** | | |
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| | JPEG embedding | OK |
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| | JPEG embedding (passthrough) | OK |
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| | PNG embedding (RGB, RGBA, Grayscale, Indexed) | OK |
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| | PNG alpha channel (soft masks) | OK |
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| | image() / imageFit() | OK |
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| | image() / imageFit() | OK |
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| | Aspect ratio preservation | OK |
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| | Aspect ratio preservation | OK |
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| **Compresion** | | |
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| | FlateDecode para content streams | OK |
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| | FlateDecode para imagenes PNG | OK |
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| | Nivel configurable (0-12) | OK |
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| | Heuristica inteligente | OK |
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| **Tablas** | | |
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| **Tablas** | | |
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| | Table helper | OK |
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| | Table helper | OK |
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| | header(), row(), footer() | OK |
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| | header(), row(), footer() | OK |
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### Tests y Ejemplos
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### Tests y Ejemplos
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- **~70 tests** unitarios pasando
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- **125+ tests** unitarios pasando
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- **7 ejemplos** funcionales:
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- **16 ejemplos** funcionales:
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- `hello.zig` - PDF minimo
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- `hello.zig` - PDF minimo
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- `invoice.zig` - Factura completa
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- `invoice.zig` - Factura completa
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- `text_demo.zig` - Sistema de texto
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- `text_demo.zig` - Sistema de texto
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- `image_demo.zig` - Imagenes JPEG
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- `image_demo.zig` - Imagenes JPEG y PNG
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- `table_demo.zig` - Table helper
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- `table_demo.zig` - Table helper
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- `pagination_demo.zig` - Paginacion multi-pagina
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- `pagination_demo.zig` - Paginacion multi-pagina
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- `links_demo.zig` - Links clickeables
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- `links_demo.zig` - Links clickeables
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- `bookmarks_demo.zig` - Bookmarks en sidebar
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- `curves_demo.zig` - Bezier, circulos, elipses, arcos
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- `transforms_demo.zig` - Rotacion, escala, skew
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- `transparency_demo.zig` - Opacidad/alpha
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- `gradient_demo.zig` - Gradientes lineales y radiales
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- `barcode_demo.zig` - Code128 y QR codes
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- `ttf_demo.zig` - TrueType font parsing
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- `template_demo.zig` - Document templates
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- `markdown_demo.zig` - Markdown styled text
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---
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---
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├── src/
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├── src/
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│ ├── root.zig # Exports publicos
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│ ├── root.zig # Exports publicos
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│ ├── pdf.zig # Pdf facade (API principal)
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│ ├── pdf.zig # Pdf facade (API principal)
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│ ├── page.zig # Page + texto + links
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│ ├── page.zig # Page + texto + links + transformaciones
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│ ├── content_stream.zig # Operadores PDF
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│ ├── content_stream.zig # Operadores PDF
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│ ├── table.zig # Table helper
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│ ├── table.zig # Table helper
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│ ├── pagination.zig # Paginacion, headers, footers
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│ ├── pagination.zig # Paginacion, headers, footers
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│ ├── links.zig # Link types
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│ ├── links.zig # Link types
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│ ├── outline.zig # Bookmarks/Outline
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│ ├── security/
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│ │ ├── mod.zig # Security exports
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│ │ ├── rc4.zig # RC4 cipher
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│ │ └── encryption.zig # PDF encryption handler
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│ ├── forms/
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│ │ ├── mod.zig # Forms exports
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│ │ └── field.zig # TextField, CheckBox
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│ ├── svg/
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│ │ ├── mod.zig # SVG exports
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│ │ └── parser.zig # SVG parser
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│ ├── template/
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│ │ ├── mod.zig # Template exports
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│ │ └── template.zig # Template, Region definitions
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│ ├── markdown/
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│ │ ├── mod.zig # Markdown exports
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│ │ └── markdown.zig # MarkdownRenderer, TextSpan
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│ ├── fonts/
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│ ├── fonts/
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│ │ └── type1.zig # 14 fuentes Type1 + metricas
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│ │ ├── type1.zig # 14 fuentes Type1 + metricas
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│ │ └── ttf.zig # TrueType font parser
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│ ├── graphics/
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│ ├── graphics/
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│ │ └── color.zig # Color (RGB, CMYK, Gray)
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│ │ ├── color.zig # Color (RGB, CMYK, Gray)
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│ │ ├── extgstate.zig # Extended Graphics State (transparency)
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│ │ └── gradient.zig # Linear/Radial gradients
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│ ├── barcodes/
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│ │ ├── mod.zig # Barcode exports
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│ │ ├── code128.zig # Code128 1D barcode
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│ │ └── qr.zig # QR Code 2D barcode
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│ ├── images/
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│ ├── images/
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│ │ ├── jpeg.zig # JPEG parser
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│ │ ├── jpeg.zig # JPEG parser
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│ │ ├── png.zig # PNG metadata
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│ │ ├── png.zig # PNG parser + unfiltering
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│ │ └── image_info.zig # ImageInfo struct
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│ │ └── image_info.zig # ImageInfo struct
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│ ├── compression/
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│ │ ├── mod.zig # Compression exports
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│ │ └── zlib.zig # libdeflate wrapper
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│ ├── objects/
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│ ├── objects/
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│ │ └── base.zig # PageSize, Orientation
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│ │ └── base.zig # PageSize, Orientation
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│ └── output/
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│ └── output/
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│ └── producer.zig # Serializa PDF + images + links
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│ └── producer.zig # Serializa PDF + images + links + outline
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└── examples/
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└── examples/
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├── hello.zig
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├── hello.zig
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├── invoice.zig
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├── invoice.zig
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├── image_demo.zig
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├── image_demo.zig
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├── table_demo.zig
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├── table_demo.zig
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├── pagination_demo.zig
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├── pagination_demo.zig
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└── links_demo.zig
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├── links_demo.zig
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├── bookmarks_demo.zig
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├── curves_demo.zig
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├── transforms_demo.zig
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├── transparency_demo.zig
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├── gradient_demo.zig
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├── barcode_demo.zig
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├── ttf_demo.zig
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├── template_demo.zig
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└── markdown_demo.zig
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```
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```
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---
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---
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try page.image(img_idx, info, 50, 500, 200, 150);
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try page.image(img_idx, info, 50, 500, 200, 150);
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```
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```
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### Curvas y Formas
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```zig
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// Curva Bezier cubica
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try page.drawBezier(x0, y0, x1, y1, x2, y2, x3, y3);
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// Circulo
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try page.drawCircle(cx, cy, radius);
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try page.fillCircle(cx, cy, radius);
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// Elipse
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try page.drawEllipse(cx, cy, rx, ry);
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try page.fillEllipse(cx, cy, rx, ry);
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// Arco
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try page.drawArc(cx, cy, rx, ry, start_deg, end_deg);
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```
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### Transformaciones
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```zig
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// Rotar alrededor de un punto
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try page.saveState();
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try page.rotate(45, center_x, center_y); // 45 grados
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// ... dibujar contenido rotado ...
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try page.restoreState();
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// Escalar
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try page.scale(2.0, 1.5, cx, cy); // 2x horizontal, 1.5x vertical
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// Skew/Shear
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try page.skew(15, 0); // 15 grados en X
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// Trasladar
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try page.translate(100, 50);
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```
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### Transparencia
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```zig
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// Opacidad de relleno
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try page.setFillOpacity(0.5); // 50% transparente
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// Opacidad de trazo
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try page.setStrokeOpacity(0.75); // 75% opaco
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// Ambos a la vez
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try page.setOpacity(0.3); // 30% opaco
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// Restaurar opacidad completa
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try page.setOpacity(1.0);
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```
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### Gradientes
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```zig
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||||||
|
// Gradiente lineal en rectangulo
|
||||||
|
try page.linearGradientRect(x, y, width, height, Color.red, Color.blue, .horizontal);
|
||||||
|
try page.linearGradientRect(x, y, width, height, Color.green, Color.yellow, .vertical);
|
||||||
|
try page.linearGradientRect(x, y, width, height, Color.purple, Color.cyan, .diagonal);
|
||||||
|
|
||||||
|
// Gradiente radial en circulo (centro a borde)
|
||||||
|
try page.radialGradientCircle(cx, cy, radius, Color.white, Color.blue);
|
||||||
|
|
||||||
|
// Gradiente radial en elipse
|
||||||
|
try page.radialGradientEllipse(cx, cy, rx, ry, Color.yellow, Color.red);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Barcodes
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Code128 1D barcode
|
||||||
|
try page.drawCode128(x, y, "ABC-12345", 50, 1.5); // height=50, module_width=1.5
|
||||||
|
|
||||||
|
// Code128 con texto debajo
|
||||||
|
try page.drawCode128WithText(x, y, "ABC-12345", 50, 1.5, true);
|
||||||
|
|
||||||
|
// QR Code 2D barcode
|
||||||
|
try page.drawQRCode(x, y, "HTTPS://GITHUB.COM", 100, zpdf.QRCode.ErrorCorrection.M);
|
||||||
|
|
||||||
|
// Error correction levels:
|
||||||
|
// .L - Low (7% recovery)
|
||||||
|
// .M - Medium (15% recovery)
|
||||||
|
// .Q - Quartile (25% recovery)
|
||||||
|
// .H - High (30% recovery)
|
||||||
|
```
|
||||||
|
|
||||||
|
### TrueType Fonts
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Load TTF font from file
|
||||||
|
const font_idx = try pdf.addTtfFontFromFile("/path/to/font.ttf");
|
||||||
|
const font = pdf.getTtfFont(font_idx).?;
|
||||||
|
|
||||||
|
// Get font information
|
||||||
|
std.debug.print("Family: {s}\n", .{font.family_name});
|
||||||
|
std.debug.print("Units/EM: {d}\n", .{font.units_per_em});
|
||||||
|
std.debug.print("Ascender: {d}\n", .{font.ascender});
|
||||||
|
std.debug.print("Descender: {d}\n", .{font.descender});
|
||||||
|
std.debug.print("Num glyphs: {d}\n", .{font.num_glyphs});
|
||||||
|
|
||||||
|
// Get character width
|
||||||
|
const glyph_id = font.getGlyphIndex('A');
|
||||||
|
const width = font.getGlyphWidth(glyph_id);
|
||||||
|
|
||||||
|
// Calculate string width in points
|
||||||
|
const text_width = font.stringWidth("Hello", 12.0);
|
||||||
|
|
||||||
|
// Note: Full TTF embedding for rendering text requires CIDFont Type 2
|
||||||
|
// output which is planned for a future version.
|
||||||
|
```
|
||||||
|
|
||||||
|
### Bookmarks
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Agregar bookmark que apunta a pagina
|
||||||
|
try doc.addBookmark("Capitulo 1", 0); // pagina 0
|
||||||
|
|
||||||
|
// Con posicion Y especifica
|
||||||
|
try doc.addBookmarkAt("Seccion 1.1", 0, 500);
|
||||||
|
|
||||||
|
// Los bookmarks aparecen en el sidebar del lector PDF
|
||||||
|
```
|
||||||
|
|
||||||
### Links Clickeables
|
### Links Clickeables
|
||||||
|
|
||||||
```zig
|
```zig
|
||||||
|
|
@ -215,6 +467,13 @@ $ZIG build test
|
||||||
./zig-out/bin/table_demo
|
./zig-out/bin/table_demo
|
||||||
./zig-out/bin/pagination_demo
|
./zig-out/bin/pagination_demo
|
||||||
./zig-out/bin/links_demo
|
./zig-out/bin/links_demo
|
||||||
|
./zig-out/bin/bookmarks_demo
|
||||||
|
./zig-out/bin/curves_demo
|
||||||
|
./zig-out/bin/transforms_demo
|
||||||
|
./zig-out/bin/transparency_demo
|
||||||
|
./zig-out/bin/gradient_demo
|
||||||
|
./zig-out/bin/barcode_demo
|
||||||
|
./zig-out/bin/ttf_demo
|
||||||
```
|
```
|
||||||
|
|
||||||
---
|
---
|
||||||
|
|
@ -237,7 +496,7 @@ $ZIG build test
|
||||||
### Fase 3 - Imagenes (COMPLETADO)
|
### Fase 3 - Imagenes (COMPLETADO)
|
||||||
- [x] JPEG embedding
|
- [x] JPEG embedding
|
||||||
- [x] image() / imageFit()
|
- [x] image() / imageFit()
|
||||||
- [x] PNG metadata (embedding pendiente)
|
- [x] PNG embedding completo
|
||||||
|
|
||||||
### Fase 4 - Utilidades (COMPLETADO)
|
### Fase 4 - Utilidades (COMPLETADO)
|
||||||
- [x] Table helper
|
- [x] Table helper
|
||||||
|
|
@ -250,17 +509,212 @@ $ZIG build test
|
||||||
- [x] Internal page links
|
- [x] Internal page links
|
||||||
- [x] Link annotations en PDF
|
- [x] Link annotations en PDF
|
||||||
|
|
||||||
### Futuro (Opcional)
|
### Fase 6 - PNG + Compresion (COMPLETADO)
|
||||||
- [ ] PNG embedding completo
|
- [x] Integracion libdeflate-zig
|
||||||
- [ ] Compresion de streams
|
- [x] PNG parsing completo (RGB, RGBA, Grayscale, Indexed)
|
||||||
- [ ] Fuentes TTF
|
- [x] PNG unfiltering (None, Sub, Up, Average, Paeth)
|
||||||
- [ ] Bookmarks
|
- [x] Soft masks para canal alpha
|
||||||
|
- [x] FlateDecode para content streams
|
||||||
|
- [x] Compresion configurable (nivel 0-12)
|
||||||
|
- [x] Heuristica inteligente (min_size, min_ratio)
|
||||||
|
|
||||||
|
### Fase 7 - Bookmarks/Outline (COMPLETADO)
|
||||||
|
- [x] OutlineItem struct
|
||||||
|
- [x] addBookmark() / addBookmarkAt()
|
||||||
|
- [x] Outline en sidebar del lector PDF
|
||||||
|
|
||||||
|
### Fase 8 - Curvas Bezier (COMPLETADO)
|
||||||
|
- [x] drawBezier() - curvas cubicas
|
||||||
|
- [x] drawQuadBezier() - curvas cuadraticas
|
||||||
|
- [x] drawCircle() / fillCircle()
|
||||||
|
- [x] drawEllipse() / fillEllipse()
|
||||||
|
- [x] drawArc()
|
||||||
|
|
||||||
|
### Fase 9 - Transformaciones (COMPLETADO)
|
||||||
|
- [x] rotate() - rotacion alrededor de punto
|
||||||
|
- [x] scale() - escala desde punto
|
||||||
|
- [x] translate() - traslacion
|
||||||
|
- [x] skew() - deformacion
|
||||||
|
- [x] transform() - matriz personalizada
|
||||||
|
- [x] saveState() / restoreState()
|
||||||
|
|
||||||
|
### Fase 10 - Transparencia (COMPLETADO)
|
||||||
|
- [x] ExtGState para opacidad
|
||||||
|
- [x] setFillOpacity()
|
||||||
|
- [x] setStrokeOpacity()
|
||||||
|
- [x] setOpacity()
|
||||||
|
|
||||||
|
### Fase 11 - Gradientes (COMPLETADO)
|
||||||
|
- [x] LinearGradient (horizontal, vertical, diagonal)
|
||||||
|
- [x] RadialGradient (circle, ellipse)
|
||||||
|
- [x] Shading Patterns Type 2 (axial) y Type 3 (radial)
|
||||||
|
- [x] linearGradientRect()
|
||||||
|
- [x] radialGradientCircle()
|
||||||
|
- [x] radialGradientEllipse()
|
||||||
|
|
||||||
|
### Fase 12 - Barcodes (COMPLETADO)
|
||||||
|
- [x] Code128 1D barcode (ASCII 0-127)
|
||||||
|
- [x] Code Sets A, B, C con switching automatico
|
||||||
|
- [x] QR Code 2D barcode (ISO/IEC 18004)
|
||||||
|
- [x] Error correction levels (L, M, Q, H)
|
||||||
|
- [x] drawCode128() / drawCode128WithText()
|
||||||
|
- [x] drawQRCode()
|
||||||
|
|
||||||
|
### Fase 13 - TTF Fonts (COMPLETADO)
|
||||||
|
- [x] TrueType font file parsing
|
||||||
|
- [x] Font metrics (units_per_em, ascender, descender, etc.)
|
||||||
|
- [x] Glyph width tables
|
||||||
|
- [x] Character to glyph mapping (cmap format 0, 4, 6, 12)
|
||||||
|
- [x] addTtfFontFromFile()
|
||||||
|
- [x] stringWidth() calculation
|
||||||
|
- [ ] Full TTF embedding for PDF rendering (CIDFont Type 2) - Future
|
||||||
|
|
||||||
|
### Fase 14 - Security/Encryption (COMPLETADO)
|
||||||
|
- [x] RC4 stream cipher (40-bit and 128-bit)
|
||||||
|
- [x] PDF Standard Security Handler
|
||||||
|
- [x] User/Owner password handling
|
||||||
|
- [x] Permission flags (print, modify, copy, annotate, etc.)
|
||||||
|
- [x] MD5-based key derivation
|
||||||
|
- [x] Object key generation
|
||||||
|
- [ ] Full PDF output integration - Future
|
||||||
|
|
||||||
|
### Fase 15 - Forms/AcroForms (COMPLETADO)
|
||||||
|
- [x] TextField struct (name, position, size)
|
||||||
|
- [x] CheckBox struct
|
||||||
|
- [x] FieldFlags (readonly, required, multiline, password)
|
||||||
|
- [x] FormField union type
|
||||||
|
- [x] toFormField() conversion
|
||||||
|
- [ ] Full PDF AcroForm output integration - Future
|
||||||
|
|
||||||
|
### Fase 16 - SVG Import (COMPLETADO)
|
||||||
|
- [x] SvgParser struct
|
||||||
|
- [x] Basic shapes (rect, circle, ellipse, line)
|
||||||
|
- [x] Path element with commands
|
||||||
|
- [x] PathCommand enum (MoveTo, LineTo, CurveTo, etc.)
|
||||||
|
- [x] Color parsing (fill, stroke)
|
||||||
|
- [x] toPdfContent() - generates PDF operators
|
||||||
|
- [ ] Text elements - Future
|
||||||
|
- [ ] Transforms - Future
|
||||||
|
|
||||||
|
### Fase 17 - Templates (COMPLETADO)
|
||||||
|
- [x] Template struct with named regions
|
||||||
|
- [x] TemplateRegion (position, size, type)
|
||||||
|
- [x] RegionType enum (text, image, table, custom)
|
||||||
|
- [x] FixedContent for repeating elements
|
||||||
|
- [x] invoiceTemplate() predefined
|
||||||
|
- [x] letterTemplate() predefined
|
||||||
|
- [x] template_demo.zig ejemplo
|
||||||
|
|
||||||
|
### Fase 18 - Markdown Styling (COMPLETADO)
|
||||||
|
- [x] MarkdownRenderer struct
|
||||||
|
- [x] SpanStyle (bold, italic, underline, strikethrough)
|
||||||
|
- [x] TextSpan with style, color, url, font_size
|
||||||
|
- [x] Inline parsing: **bold**, *italic*, ***both***, ~~strike~~
|
||||||
|
- [x] Links: [text](url)
|
||||||
|
- [x] Headings: #, ##, ###
|
||||||
|
- [x] Lists: - bullet, 1. numbered
|
||||||
|
- [x] fontForStyle() helper
|
||||||
|
- [x] markdown_demo.zig ejemplo
|
||||||
|
|
||||||
|
### Futuro
|
||||||
|
|
||||||
|
| Fase | Nombre | Prioridad |
|
||||||
|
|------|--------|-----------|
|
||||||
|
| 19 | Mejoras de Calidad | CONTINUA |
|
||||||
|
|
||||||
---
|
---
|
||||||
|
|
||||||
## Historial
|
## Historial
|
||||||
|
|
||||||
### 2025-12-08 - v0.5 (Links Clickeables)
|
### 2025-12-09 - v0.16 (Markdown Styling) - FEATURE COMPLETE
|
||||||
|
- MarkdownRenderer para texto con estilo
|
||||||
|
- SpanStyle (bold, italic, underline, strikethrough)
|
||||||
|
- TextSpan con style, color, url, font_size
|
||||||
|
- Parsing de: **bold**, *italic*, ***bold+italic***
|
||||||
|
- Strikethrough: ~~text~~
|
||||||
|
- Links: [text](url)
|
||||||
|
- Headings: #, ##, ###
|
||||||
|
- Lists: - bullet, 1. numbered
|
||||||
|
- fontForStyle() helper function
|
||||||
|
- markdown_demo.zig ejemplo
|
||||||
|
- 125+ tests, 16 ejemplos
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.15 (Templates)
|
||||||
|
- Template struct con regiones nombradas
|
||||||
|
- TemplateRegion para definir areas de contenido
|
||||||
|
- FixedContent para elementos repetitivos
|
||||||
|
- invoiceTemplate() y letterTemplate() predefinidos
|
||||||
|
- template_demo.zig ejemplo
|
||||||
|
- 120+ tests, 15 ejemplos
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.14 (SVG Import)
|
||||||
|
- SvgParser para importar graficos vectoriales
|
||||||
|
- Soporte para rect, circle, ellipse, line, path
|
||||||
|
- PathCommand para curvas y lineas
|
||||||
|
- toPdfContent() genera operadores PDF
|
||||||
|
- svg/mod.zig, parser.zig
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.13 (Forms)
|
||||||
|
- TextField y CheckBox structs
|
||||||
|
- FieldFlags (readonly, required, multiline, password)
|
||||||
|
- FormField union type
|
||||||
|
- forms/mod.zig, field.zig
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.12 (Security)
|
||||||
|
- RC4 stream cipher (40-bit and 128-bit)
|
||||||
|
- PDF Standard Security Handler
|
||||||
|
- User/Owner password processing
|
||||||
|
- Permission flags (Permissions struct)
|
||||||
|
- MD5-based key derivation (Algorithms 3.1-3.5)
|
||||||
|
- security/mod.zig, rc4.zig, encryption.zig
|
||||||
|
- 100+ tests
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.11 (TTF Fonts)
|
||||||
|
- TrueType font file parsing (tables: head, hhea, maxp, hmtx, cmap, name, OS/2, post)
|
||||||
|
- Font metrics extraction
|
||||||
|
- Glyph width tables for string width calculation
|
||||||
|
- Character to glyph mapping (cmap formats 0, 4, 6, 12)
|
||||||
|
- addTtfFontFromFile(), getTtfFont()
|
||||||
|
- ttf_demo.zig ejemplo
|
||||||
|
- 14 ejemplos, 95+ tests
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.10 (Barcodes)
|
||||||
|
- Code128 1D barcode con Code Sets A, B, C
|
||||||
|
- QR Code 2D barcode con error correction levels
|
||||||
|
- drawCode128(), drawCode128WithText(), drawQRCode()
|
||||||
|
- barcode_demo.zig ejemplo
|
||||||
|
- 13 ejemplos, 90+ tests
|
||||||
|
|
||||||
|
### 2025-12-09 - v0.9 (Gradientes)
|
||||||
|
- Linear gradients (horizontal, vertical, diagonal)
|
||||||
|
- Radial gradients (circle, ellipse)
|
||||||
|
- Shading Patterns Type 2 (axial) y Type 3 (radial)
|
||||||
|
- linearGradientRect(), radialGradientCircle(), radialGradientEllipse()
|
||||||
|
- GradientData, LinearGradient, RadialGradient types
|
||||||
|
- gradient_demo.zig ejemplo
|
||||||
|
- 12 ejemplos, 85+ tests
|
||||||
|
|
||||||
|
### 2025-12-08 - v0.8 (Bookmarks + Bezier + Transforms + Transparency)
|
||||||
|
- Bookmarks/Outline para navegacion en sidebar
|
||||||
|
- Curvas Bezier (cubicas y cuadraticas)
|
||||||
|
- Circulos, elipses y arcos
|
||||||
|
- Transformaciones: rotacion, escala, traslacion, skew
|
||||||
|
- saveState()/restoreState() para limitar transformaciones
|
||||||
|
- Transparencia via ExtGState
|
||||||
|
- setFillOpacity(), setStrokeOpacity(), setOpacity()
|
||||||
|
- 4 nuevos ejemplos
|
||||||
|
- 85+ tests pasando
|
||||||
|
|
||||||
|
### 2025-12-08 - v0.7 (PNG + Compresion)
|
||||||
|
- Integracion libdeflate-zig para compresion
|
||||||
|
- PNG embedding completo (RGB, RGBA, Grayscale, Indexed)
|
||||||
|
- PNG unfiltering (5 filtros)
|
||||||
|
- Soft masks para transparencia
|
||||||
|
- FlateDecode para content streams
|
||||||
|
- Compresion configurable con heuristica
|
||||||
|
- 82+ tests pasando
|
||||||
|
|
||||||
|
### 2025-12-08 - v0.6 (Links Clickeables)
|
||||||
- Link annotations clickeables en PDF
|
- Link annotations clickeables en PDF
|
||||||
- addUrlLink() / addInternalLink() en Page
|
- addUrlLink() / addInternalLink() en Page
|
||||||
- urlLink() / writeUrlLink() combinan visual + annotation
|
- urlLink() / writeUrlLink() combinan visual + annotation
|
||||||
|
|
@ -268,23 +722,26 @@ $ZIG build test
|
||||||
- links_demo.zig ejemplo con 2 paginas
|
- links_demo.zig ejemplo con 2 paginas
|
||||||
- 7 ejemplos, ~70 tests
|
- 7 ejemplos, ~70 tests
|
||||||
|
|
||||||
### 2025-12-08 - v0.4 (Utilidades)
|
### 2025-12-08 - v0.5 (Utilidades)
|
||||||
- Table helper
|
- Table helper
|
||||||
- Pagination (numeros de pagina)
|
- Pagination (numeros de pagina)
|
||||||
- Headers/Footers automaticos
|
- Headers/Footers automaticos
|
||||||
- Links visuales
|
- Links visuales
|
||||||
|
|
||||||
### 2025-12-08 - v0.3 (Imagenes)
|
### 2025-12-08 - v0.4 (Imagenes)
|
||||||
- JPEG embedding
|
- JPEG embedding
|
||||||
- image() / imageFit()
|
- image() / imageFit()
|
||||||
|
|
||||||
### 2025-12-08 - v0.2 (Texto)
|
### 2025-12-08 - v0.3 (Texto)
|
||||||
- cell() / multiCell()
|
- cell() / multiCell()
|
||||||
- Word wrap, alineacion
|
- Word wrap, alineacion
|
||||||
|
|
||||||
### 2025-12-08 - v0.1 (Core)
|
### 2025-12-08 - v0.2 (Core)
|
||||||
- Estructura inicial
|
- Estructura inicial
|
||||||
|
|
||||||
|
### 2025-12-08 - v0.1 (Setup)
|
||||||
|
- Setup inicial del proyecto
|
||||||
|
|
||||||
---
|
---
|
||||||
|
|
||||||
## Equipo
|
## Equipo
|
||||||
|
|
@ -297,4 +754,4 @@ git remote: git@git.reugenio.com:reugenio/zpdf.git
|
||||||
---
|
---
|
||||||
|
|
||||||
**zpdf - Generador PDF para Zig**
|
**zpdf - Generador PDF para Zig**
|
||||||
*v0.5 - Feature Complete - 2025-12-08*
|
*v1.0 - RELEASE (FEATURE COMPLETE) - 2025-12-09*
|
||||||
|
|
|
||||||
441
FUTURE_IMPROVEMENTS.md
Normal file
441
FUTURE_IMPROVEMENTS.md
Normal file
|
|
@ -0,0 +1,441 @@
|
||||||
|
# zpdf - Mejoras Futuras
|
||||||
|
|
||||||
|
> Este documento detalla las posibles mejoras y funcionalidades que podrían implementarse en versiones futuras de zpdf.
|
||||||
|
> Fecha: 2025-12-09
|
||||||
|
> Versión actual: v1.0
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 1. TTF Font Embedding (Prioridad: ALTA)
|
||||||
|
|
||||||
|
### Estado Actual
|
||||||
|
El módulo `src/fonts/ttf.zig` puede parsear archivos TrueType y extraer:
|
||||||
|
- Métricas de fuente (ascender, descender, units_per_em)
|
||||||
|
- Anchos de glyph
|
||||||
|
- Mapeo character-to-glyph (cmap)
|
||||||
|
- Nombre de familia
|
||||||
|
|
||||||
|
### Lo que falta
|
||||||
|
Para renderizar texto con fuentes TTF embebidas en el PDF necesitamos:
|
||||||
|
|
||||||
|
1. **CIDFont Type 2 Output**
|
||||||
|
- Generar objeto `/Type /Font /Subtype /Type0` (composite font)
|
||||||
|
- Crear `/DescendantFonts` con CIDFont
|
||||||
|
- Generar `/CIDSystemInfo` dictionary
|
||||||
|
- Escribir `/W` array con anchos de caracteres
|
||||||
|
|
||||||
|
2. **Font Descriptor**
|
||||||
|
- `/Type /FontDescriptor`
|
||||||
|
- `/FontName`, `/FontFamily`
|
||||||
|
- `/Flags` (serif, symbolic, etc.)
|
||||||
|
- `/FontBBox`, `/ItalicAngle`, `/Ascent`, `/Descent`
|
||||||
|
- `/CapHeight`, `/StemV`
|
||||||
|
|
||||||
|
3. **Font Program Embedding**
|
||||||
|
- Subset del archivo TTF (solo glyphs usados)
|
||||||
|
- Stream con `/Filter /FlateDecode`
|
||||||
|
- `/Length1` con tamaño original
|
||||||
|
|
||||||
|
4. **ToUnicode CMap**
|
||||||
|
- Mapeo de CIDs a caracteres Unicode
|
||||||
|
- Necesario para copiar/pegar texto del PDF
|
||||||
|
|
||||||
|
### Archivos a modificar
|
||||||
|
- `src/fonts/ttf.zig` - Añadir funciones de subsetting
|
||||||
|
- `src/output/producer.zig` - Generar objetos CIDFont
|
||||||
|
- `src/page.zig` - Soporte para usar TTF fonts al dibujar texto
|
||||||
|
|
||||||
|
### Referencias
|
||||||
|
- PDF Reference 1.4, Sección 5.6 (Composite Fonts)
|
||||||
|
- PDF Reference 1.4, Sección 5.8 (Font Descriptors)
|
||||||
|
- TrueType Reference Manual de Apple
|
||||||
|
|
||||||
|
### Estimación de complejidad
|
||||||
|
ALTA - Requiere entender bien la estructura CIDFont y el subsetting de TTF.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 2. PDF Encryption Integration (Prioridad: MEDIA)
|
||||||
|
|
||||||
|
### Estado Actual
|
||||||
|
El módulo `src/security/` tiene implementado:
|
||||||
|
- `rc4.zig` - Cifrado RC4 (40-bit y 128-bit)
|
||||||
|
- `encryption.zig` - Procesamiento de passwords, key derivation, permission flags
|
||||||
|
|
||||||
|
### Lo que falta
|
||||||
|
|
||||||
|
1. **Integración con OutputProducer**
|
||||||
|
```zig
|
||||||
|
// En output/producer.zig
|
||||||
|
pub fn produceEncrypted(
|
||||||
|
self: *Self,
|
||||||
|
user_password: ?[]const u8,
|
||||||
|
owner_password: ?[]const u8,
|
||||||
|
permissions: Permissions,
|
||||||
|
) ![]u8
|
||||||
|
```
|
||||||
|
|
||||||
|
2. **Encrypt Dictionary en Trailer**
|
||||||
|
```
|
||||||
|
/Encrypt <<
|
||||||
|
/Filter /Standard
|
||||||
|
/V 2
|
||||||
|
/R 3
|
||||||
|
/Length 128
|
||||||
|
/O <owner_hash>
|
||||||
|
/U <user_hash>
|
||||||
|
/P -3904 % permissions as signed integer
|
||||||
|
>>
|
||||||
|
```
|
||||||
|
|
||||||
|
3. **Cifrado de Streams y Strings**
|
||||||
|
- Cada stream debe cifrarse con key derivada de obj_num + gen_num
|
||||||
|
- Las strings en el documento también deben cifrarse
|
||||||
|
- Excepciones: /ID en trailer, strings en /Encrypt dict
|
||||||
|
|
||||||
|
4. **Document ID**
|
||||||
|
- Generar `/ID [<id1> <id2>]` en trailer
|
||||||
|
- Usar MD5 de timestamp + filename + file size
|
||||||
|
|
||||||
|
### Archivos a modificar
|
||||||
|
- `src/output/producer.zig` - Añadir modo encriptado
|
||||||
|
- `src/pdf.zig` - API para activar encriptación
|
||||||
|
- `src/security/encryption.zig` - Funciones helper adicionales
|
||||||
|
|
||||||
|
### Código de ejemplo (objetivo)
|
||||||
|
```zig
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
pdf.setEncryption(.{
|
||||||
|
.user_password = "user123",
|
||||||
|
.owner_password = "admin456",
|
||||||
|
.permissions = .{
|
||||||
|
.print = true,
|
||||||
|
.modify = false,
|
||||||
|
.copy = false,
|
||||||
|
},
|
||||||
|
.key_length = 128,
|
||||||
|
});
|
||||||
|
try pdf.save("encrypted.pdf");
|
||||||
|
```
|
||||||
|
|
||||||
|
### Referencias
|
||||||
|
- PDF Reference 1.4, Capítulo 3.5 (Encryption)
|
||||||
|
- Algoritmos 3.1-3.6 del PDF Reference
|
||||||
|
|
||||||
|
### Estimación de complejidad
|
||||||
|
MEDIA - El cifrado ya está implementado, solo falta integrarlo.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 3. AcroForms Output (Prioridad: MEDIA)
|
||||||
|
|
||||||
|
### Estado Actual
|
||||||
|
El módulo `src/forms/field.zig` define:
|
||||||
|
- `TextField` - Campos de texto
|
||||||
|
- `CheckBox` - Casillas de verificación
|
||||||
|
- `FieldFlags` - Flags de campo (readonly, required, etc.)
|
||||||
|
|
||||||
|
### Lo que falta
|
||||||
|
|
||||||
|
1. **AcroForm Dictionary en Catalog**
|
||||||
|
```
|
||||||
|
/AcroForm <<
|
||||||
|
/Fields [4 0 R 5 0 R 6 0 R]
|
||||||
|
/NeedAppearances true
|
||||||
|
/DR << /Font << /Helv 7 0 R >> >>
|
||||||
|
/DA (/Helv 12 Tf 0 g)
|
||||||
|
>>
|
||||||
|
```
|
||||||
|
|
||||||
|
2. **Field Annotations**
|
||||||
|
```
|
||||||
|
4 0 obj <<
|
||||||
|
/Type /Annot
|
||||||
|
/Subtype /Widget
|
||||||
|
/FT /Tx % Text field
|
||||||
|
/T (nombre) % Field name
|
||||||
|
/V (valor) % Current value
|
||||||
|
/Rect [100 700 300 720]
|
||||||
|
/F 4 % Print flag
|
||||||
|
/Ff 0 % Field flags
|
||||||
|
/DA (/Helv 12 Tf 0 g)
|
||||||
|
/AP << /N 5 0 R >> % Appearance stream
|
||||||
|
>>
|
||||||
|
```
|
||||||
|
|
||||||
|
3. **Appearance Streams**
|
||||||
|
- Cada campo necesita un appearance stream
|
||||||
|
- Define cómo se renderiza visualmente el campo
|
||||||
|
|
||||||
|
4. **Tipos de campo adicionales**
|
||||||
|
- Radio buttons (`/FT /Btn` con `/Ff` flag radio)
|
||||||
|
- Dropdown/Combo (`/FT /Ch`)
|
||||||
|
- Signature fields (`/FT /Sig`)
|
||||||
|
|
||||||
|
### Archivos a modificar
|
||||||
|
- `src/forms/field.zig` - Añadir más tipos de campo
|
||||||
|
- `src/output/producer.zig` - Generar AcroForm y annotations
|
||||||
|
- `src/pdf.zig` - API para añadir campos
|
||||||
|
|
||||||
|
### Código de ejemplo (objetivo)
|
||||||
|
```zig
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
try page.addTextField(.{
|
||||||
|
.name = "nombre",
|
||||||
|
.x = 100,
|
||||||
|
.y = 700,
|
||||||
|
.width = 200,
|
||||||
|
.height = 20,
|
||||||
|
.default_value = "Escribe aquí...",
|
||||||
|
});
|
||||||
|
|
||||||
|
try page.addCheckBox(.{
|
||||||
|
.name = "acepto",
|
||||||
|
.x = 100,
|
||||||
|
.y = 650,
|
||||||
|
.checked = false,
|
||||||
|
});
|
||||||
|
```
|
||||||
|
|
||||||
|
### Referencias
|
||||||
|
- PDF Reference 1.4, Capítulo 8.6 (Interactive Forms)
|
||||||
|
- PDF Reference 1.4, Sección 8.4.5 (Widget Annotations)
|
||||||
|
|
||||||
|
### Estimación de complejidad
|
||||||
|
MEDIA-ALTA - Los appearance streams son complicados.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 4. SVG Avanzado (Prioridad: BAJA)
|
||||||
|
|
||||||
|
### Estado Actual
|
||||||
|
El módulo `src/svg/parser.zig` soporta:
|
||||||
|
- Elementos: `<rect>`, `<circle>`, `<ellipse>`, `<line>`, `<path>`
|
||||||
|
- Atributos: fill, stroke, stroke-width
|
||||||
|
- Path commands: M, L, H, V, C, S, Q, T, A, Z
|
||||||
|
|
||||||
|
### Lo que falta
|
||||||
|
|
||||||
|
1. **Elemento `<text>`**
|
||||||
|
```xml
|
||||||
|
<text x="100" y="50" font-family="Arial" font-size="24">Hello</text>
|
||||||
|
```
|
||||||
|
- Parsing de atributos de texto
|
||||||
|
- Mapeo font-family a fuentes PDF
|
||||||
|
|
||||||
|
2. **Transformaciones**
|
||||||
|
```xml
|
||||||
|
<g transform="translate(100,50) rotate(45) scale(2)">
|
||||||
|
```
|
||||||
|
- Parsing de atributo transform
|
||||||
|
- Aplicar matriz de transformación
|
||||||
|
|
||||||
|
3. **Gradientes SVG**
|
||||||
|
```xml
|
||||||
|
<linearGradient id="grad1">
|
||||||
|
<stop offset="0%" stop-color="red"/>
|
||||||
|
<stop offset="100%" stop-color="blue"/>
|
||||||
|
</linearGradient>
|
||||||
|
<rect fill="url(#grad1)"/>
|
||||||
|
```
|
||||||
|
- Parsing de `<linearGradient>` y `<radialGradient>`
|
||||||
|
- Mapeo a gradientes PDF existentes
|
||||||
|
|
||||||
|
4. **Grupos y referencias**
|
||||||
|
```xml
|
||||||
|
<defs>
|
||||||
|
<symbol id="icon">...</symbol>
|
||||||
|
</defs>
|
||||||
|
<use href="#icon" x="100" y="200"/>
|
||||||
|
```
|
||||||
|
|
||||||
|
5. **Clipping paths**
|
||||||
|
```xml
|
||||||
|
<clipPath id="clip">
|
||||||
|
<circle cx="100" cy="100" r="50"/>
|
||||||
|
</clipPath>
|
||||||
|
```
|
||||||
|
|
||||||
|
6. **Estilos CSS inline**
|
||||||
|
```xml
|
||||||
|
<rect style="fill:red; stroke:blue; stroke-width:2"/>
|
||||||
|
```
|
||||||
|
|
||||||
|
### Archivos a modificar
|
||||||
|
- `src/svg/parser.zig` - Añadir parsing de elementos
|
||||||
|
- `src/svg/transform.zig` (nuevo) - Parsing de transformaciones
|
||||||
|
- `src/svg/gradient.zig` (nuevo) - Gradientes SVG
|
||||||
|
|
||||||
|
### Estimación de complejidad
|
||||||
|
ALTA - SVG es un formato muy complejo. Implementar soporte completo requiere mucho trabajo.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 5. Markdown Avanzado (Prioridad: BAJA)
|
||||||
|
|
||||||
|
### Estado Actual
|
||||||
|
El módulo `src/markdown/markdown.zig` soporta:
|
||||||
|
- **Bold**: `**text**` o `__text__`
|
||||||
|
- **Italic**: `*text*` o `_text_`
|
||||||
|
- **Bold+Italic**: `***text***`
|
||||||
|
- **Strikethrough**: `~~text~~`
|
||||||
|
- **Links**: `[text](url)`
|
||||||
|
- **Headings**: `#`, `##`, `###`
|
||||||
|
- **Lists**: `- bullet` y `1. numbered`
|
||||||
|
|
||||||
|
### Lo que falta
|
||||||
|
|
||||||
|
1. **Code blocks**
|
||||||
|
````markdown
|
||||||
|
```zig
|
||||||
|
const x = 42;
|
||||||
|
```
|
||||||
|
````
|
||||||
|
- Fondo gris
|
||||||
|
- Fuente monospace (Courier)
|
||||||
|
- Syntax highlighting (opcional, muy complejo)
|
||||||
|
|
||||||
|
2. **Inline code**
|
||||||
|
```markdown
|
||||||
|
Use `const` for constants
|
||||||
|
```
|
||||||
|
- Fondo gris
|
||||||
|
- Fuente Courier
|
||||||
|
|
||||||
|
3. **Blockquotes**
|
||||||
|
```markdown
|
||||||
|
> This is a quote
|
||||||
|
> with multiple lines
|
||||||
|
```
|
||||||
|
- Indentación
|
||||||
|
- Línea vertical izquierda
|
||||||
|
- Color de texto gris
|
||||||
|
|
||||||
|
4. **Tablas Markdown**
|
||||||
|
```markdown
|
||||||
|
| Header 1 | Header 2 |
|
||||||
|
|----------|----------|
|
||||||
|
| Cell 1 | Cell 2 |
|
||||||
|
```
|
||||||
|
- Parsing de sintaxis de tabla
|
||||||
|
- Integración con Table helper existente
|
||||||
|
|
||||||
|
5. **Imágenes**
|
||||||
|
```markdown
|
||||||
|
|
||||||
|
```
|
||||||
|
- Cargar imagen
|
||||||
|
- Insertar en posición
|
||||||
|
|
||||||
|
6. **Horizontal rules**
|
||||||
|
```markdown
|
||||||
|
---
|
||||||
|
```
|
||||||
|
|
||||||
|
7. **Nested lists**
|
||||||
|
```markdown
|
||||||
|
- Item 1
|
||||||
|
- Subitem 1.1
|
||||||
|
- Subitem 1.2
|
||||||
|
- Item 2
|
||||||
|
```
|
||||||
|
|
||||||
|
8. **Task lists**
|
||||||
|
```markdown
|
||||||
|
- [x] Completed task
|
||||||
|
- [ ] Pending task
|
||||||
|
```
|
||||||
|
|
||||||
|
### Archivos a modificar
|
||||||
|
- `src/markdown/markdown.zig` - Añadir parsing de elementos
|
||||||
|
- `src/markdown/renderer.zig` (nuevo) - Renderer dedicado a PDF
|
||||||
|
|
||||||
|
### Estimación de complejidad
|
||||||
|
MEDIA - El parsing es relativamente simple, la renderización requiere más trabajo.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 6. Otras Mejoras Menores
|
||||||
|
|
||||||
|
### 6.1 Compresión de imágenes JPEG
|
||||||
|
- Actualmente JPEG se incluye sin modificar (passthrough)
|
||||||
|
- Podría añadirse recompresión para reducir tamaño
|
||||||
|
- Requiere librería de decodificación JPEG
|
||||||
|
|
||||||
|
### 6.2 Soporte para más formatos de imagen
|
||||||
|
- **GIF** - Convertir a PNG internamente
|
||||||
|
- **WebP** - Formato moderno, buena compresión
|
||||||
|
- **TIFF** - Común en documentos escaneados
|
||||||
|
- **BMP** - Formato simple sin compresión
|
||||||
|
|
||||||
|
### 6.3 Metadata XMP
|
||||||
|
- Actualmente usamos metadata básica (/Title, /Author, etc.)
|
||||||
|
- XMP permite metadata más rica y extensible
|
||||||
|
- Útil para PDF/A compliance
|
||||||
|
|
||||||
|
### 6.4 PDF/A Compliance
|
||||||
|
- Estándar para archivado a largo plazo
|
||||||
|
- Requiere:
|
||||||
|
- Embeber todas las fuentes
|
||||||
|
- No encriptación
|
||||||
|
- Metadata XMP
|
||||||
|
- Color profiles ICC
|
||||||
|
|
||||||
|
### 6.5 Layers (Optional Content Groups)
|
||||||
|
- Capas que pueden mostrarse/ocultarse
|
||||||
|
- Útil para planos, versiones de documento
|
||||||
|
|
||||||
|
### 6.6 Watermarks
|
||||||
|
- Texto o imagen semitransparente de fondo
|
||||||
|
- Función helper `addWatermark()`
|
||||||
|
|
||||||
|
### 6.7 Digital Signatures
|
||||||
|
- Firmas digitales PKI
|
||||||
|
- Certificados X.509
|
||||||
|
- Timestamps
|
||||||
|
|
||||||
|
### 6.8 Annotations avanzadas
|
||||||
|
- Notas (sticky notes)
|
||||||
|
- Highlights
|
||||||
|
- Stamps
|
||||||
|
- Drawing annotations
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Priorización Recomendada
|
||||||
|
|
||||||
|
Si se retoma el desarrollo, este es el orden sugerido:
|
||||||
|
|
||||||
|
1. **TTF Font Embedding** - Muy útil para documentos con fuentes personalizadas
|
||||||
|
2. **PDF Encryption** - Ya está casi listo, solo falta integración
|
||||||
|
3. **AcroForms Output** - Formularios interactivos son muy demandados
|
||||||
|
4. **Markdown Code Blocks** - Mejora útil con poco esfuerzo
|
||||||
|
5. **SVG Text** - Completaría el soporte SVG básico
|
||||||
|
6. **Watermarks** - Feature común y relativamente simple
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Recursos y Referencias
|
||||||
|
|
||||||
|
### Especificaciones
|
||||||
|
- [PDF Reference 1.4](https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/pdfreference1.4.pdf)
|
||||||
|
- [TrueType Reference Manual](https://developer.apple.com/fonts/TrueType-Reference-Manual/)
|
||||||
|
- [SVG 1.1 Specification](https://www.w3.org/TR/SVG11/)
|
||||||
|
- [CommonMark Spec](https://spec.commonmark.org/)
|
||||||
|
|
||||||
|
### Librerías de referencia
|
||||||
|
- [fpdf2 (Python)](https://github.com/py-pdf/fpdf2) - Base de inspiración para zpdf
|
||||||
|
- [pdf-lib (JavaScript)](https://github.com/Hopding/pdf-lib) - Buena referencia para features
|
||||||
|
- [pdfkit (Node.js)](https://github.com/foliojs/pdfkit) - Implementación madura
|
||||||
|
|
||||||
|
### Herramientas de debugging
|
||||||
|
- `qpdf --check file.pdf` - Validar estructura PDF
|
||||||
|
- `mutool show file.pdf trailer` - Inspeccionar objetos
|
||||||
|
- `pdftotext file.pdf -` - Extraer texto (verifica fonts)
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
*Documento generado: 2025-12-09*
|
||||||
|
*zpdf v1.0 - Feature Complete*
|
||||||
2803
IMPLEMENTATION_PLAN.md
Normal file
2803
IMPLEMENTATION_PLAN.md
Normal file
File diff suppressed because it is too large
Load diff
937
README.md
Normal file
937
README.md
Normal file
|
|
@ -0,0 +1,937 @@
|
||||||
|
# zpdf - PDF Generation Library for Zig
|
||||||
|
|
||||||
|
A pure Zig library for creating PDF documents with minimal dependencies.
|
||||||
|
|
||||||
|
```zig
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
try page.drawText(50, 750, "Hello, PDF!");
|
||||||
|
|
||||||
|
try pdf.save("hello.pdf");
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
## Features
|
||||||
|
|
||||||
|
- **Pure Zig** - Minimal dependencies (only libdeflate for compression)
|
||||||
|
- **PDF 1.4** - Compatible with all PDF readers
|
||||||
|
- **Complete text system** - Fonts, alignment, word wrap, cells
|
||||||
|
- **Images** - JPEG and PNG (with alpha/transparency)
|
||||||
|
- **Vector graphics** - Lines, curves, shapes, gradients
|
||||||
|
- **Tables** - Helper for formatted tables
|
||||||
|
- **Barcodes** - Code128 (1D) and QR Code (2D)
|
||||||
|
- **Links** - Clickable URLs and internal page links
|
||||||
|
- **Bookmarks** - Document outline/navigation
|
||||||
|
- **Transformations** - Rotate, scale, translate, skew
|
||||||
|
- **Transparency** - Fill and stroke opacity
|
||||||
|
- **Templates** - Reusable document layouts
|
||||||
|
- **Markdown** - Styled text with Markdown syntax
|
||||||
|
|
||||||
|
## Installation
|
||||||
|
|
||||||
|
Add zpdf to your `build.zig.zon`:
|
||||||
|
|
||||||
|
```zig
|
||||||
|
.dependencies = .{
|
||||||
|
.zpdf = .{
|
||||||
|
.url = "https://git.reugenio.com/reugenio/zpdf/archive/v1.0.tar.gz",
|
||||||
|
.hash = "...",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
```
|
||||||
|
|
||||||
|
In your `build.zig`:
|
||||||
|
|
||||||
|
```zig
|
||||||
|
const zpdf_dep = b.dependency("zpdf", .{
|
||||||
|
.target = target,
|
||||||
|
.optimize = optimize,
|
||||||
|
});
|
||||||
|
exe.root_module.addImport("zpdf", zpdf_dep.module("zpdf"));
|
||||||
|
```
|
||||||
|
|
||||||
|
## Quick Reference
|
||||||
|
|
||||||
|
### Table of Contents
|
||||||
|
|
||||||
|
1. [Document Creation](#1-document-creation)
|
||||||
|
2. [Pages](#2-pages)
|
||||||
|
3. [Text](#3-text)
|
||||||
|
4. [Fonts](#4-fonts)
|
||||||
|
5. [Colors](#5-colors)
|
||||||
|
6. [Graphics](#6-graphics)
|
||||||
|
7. [Images](#7-images)
|
||||||
|
8. [Tables](#8-tables)
|
||||||
|
9. [Links](#9-links)
|
||||||
|
10. [Bookmarks](#10-bookmarks)
|
||||||
|
11. [Barcodes](#11-barcodes)
|
||||||
|
12. [Transformations](#12-transformations)
|
||||||
|
13. [Transparency](#13-transparency)
|
||||||
|
14. [Gradients](#14-gradients)
|
||||||
|
15. [Templates](#15-templates)
|
||||||
|
16. [Markdown](#16-markdown)
|
||||||
|
17. [Compression](#17-compression)
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 1. Document Creation
|
||||||
|
|
||||||
|
**File:** `src/pdf.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
|
||||||
|
// Create document with default settings
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
// Create document with options
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{
|
||||||
|
.page_size = .a4,
|
||||||
|
.orientation = .portrait,
|
||||||
|
.unit = .pt,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Set metadata
|
||||||
|
pdf.setTitle("Document Title");
|
||||||
|
pdf.setAuthor("Author Name");
|
||||||
|
pdf.setSubject("Subject");
|
||||||
|
pdf.setKeywords("keyword1, keyword2");
|
||||||
|
pdf.setCreator("Application Name");
|
||||||
|
|
||||||
|
// Save to file
|
||||||
|
try pdf.save("output.pdf");
|
||||||
|
|
||||||
|
// Or get as bytes
|
||||||
|
const data = try pdf.output();
|
||||||
|
defer allocator.free(data);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Pdf` | `src/pdf.zig` | Main document struct |
|
||||||
|
| `Config` | `src/pdf.zig` | Document configuration |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 2. Pages
|
||||||
|
|
||||||
|
**File:** `src/page.zig`, `src/objects/base.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Add page with document defaults
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
// Add page with specific size
|
||||||
|
var page = try pdf.addPage(.{ .size = .letter });
|
||||||
|
|
||||||
|
// Add page with custom dimensions (points)
|
||||||
|
var page = try pdf.addPageCustom(612, 792);
|
||||||
|
|
||||||
|
// Page sizes available
|
||||||
|
.a3 // 842 x 1191 pt
|
||||||
|
.a4 // 595 x 842 pt
|
||||||
|
.a5 // 420 x 595 pt
|
||||||
|
.letter // 612 x 792 pt
|
||||||
|
.legal // 612 x 1008 pt
|
||||||
|
|
||||||
|
// Orientations
|
||||||
|
.portrait
|
||||||
|
.landscape
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Page` | `src/page.zig` | Page struct with drawing methods |
|
||||||
|
| `PageSize` | `src/objects/base.zig` | Standard page sizes |
|
||||||
|
| `Orientation` | `src/objects/base.zig` | Portrait/Landscape |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 3. Text
|
||||||
|
|
||||||
|
**File:** `src/page.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Simple text at position
|
||||||
|
try page.drawText(x, y, "Hello World");
|
||||||
|
|
||||||
|
// Cell with border and background
|
||||||
|
try page.cell(width, height, "Text", Border.all, .center, true);
|
||||||
|
|
||||||
|
// Multi-line text with word wrap
|
||||||
|
try page.multiCell(width, line_height, long_text, Border.none, .left, false);
|
||||||
|
|
||||||
|
// Get/set cursor position
|
||||||
|
const x = page.getX();
|
||||||
|
const y = page.getY();
|
||||||
|
page.setXY(100, 500);
|
||||||
|
|
||||||
|
// Line break
|
||||||
|
page.ln(20); // Move down 20 points
|
||||||
|
```
|
||||||
|
|
||||||
|
### Cell Parameters
|
||||||
|
|
||||||
|
```zig
|
||||||
|
try page.cell(
|
||||||
|
width, // f32 - Cell width
|
||||||
|
height, // f32 - Cell height
|
||||||
|
text, // []const u8 - Text content
|
||||||
|
border, // Border - Border style
|
||||||
|
align, // Align - Text alignment
|
||||||
|
fill, // bool - Fill background
|
||||||
|
);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Border Options
|
||||||
|
|
||||||
|
```zig
|
||||||
|
Border.none // No border
|
||||||
|
Border.all // All sides
|
||||||
|
Border.left // Left only
|
||||||
|
Border.right // Right only
|
||||||
|
Border.top // Top only
|
||||||
|
Border.bottom // Bottom only
|
||||||
|
// Combine with Border.combine()
|
||||||
|
```
|
||||||
|
|
||||||
|
### Alignment
|
||||||
|
|
||||||
|
```zig
|
||||||
|
.left
|
||||||
|
.center
|
||||||
|
.right
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 4. Fonts
|
||||||
|
|
||||||
|
**File:** `src/fonts/type1.zig`, `src/fonts/ttf.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Set font
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
try page.setFont(.times_roman, 11);
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
|
||||||
|
// Calculate string width
|
||||||
|
const width = zpdf.Font.helvetica.stringWidth("Hello", 12.0);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Available Fonts (Type1 built-in)
|
||||||
|
|
||||||
|
| Font | Constant |
|
||||||
|
|------|----------|
|
||||||
|
| Helvetica | `.helvetica` |
|
||||||
|
| Helvetica Bold | `.helvetica_bold` |
|
||||||
|
| Helvetica Oblique | `.helvetica_oblique` |
|
||||||
|
| Helvetica Bold Oblique | `.helvetica_bold_oblique` |
|
||||||
|
| Times Roman | `.times_roman` |
|
||||||
|
| Times Bold | `.times_bold` |
|
||||||
|
| Times Italic | `.times_italic` |
|
||||||
|
| Times Bold Italic | `.times_bold_italic` |
|
||||||
|
| Courier | `.courier` |
|
||||||
|
| Courier Bold | `.courier_bold` |
|
||||||
|
| Courier Oblique | `.courier_oblique` |
|
||||||
|
| Courier Bold Oblique | `.courier_bold_oblique` |
|
||||||
|
| Symbol | `.symbol` |
|
||||||
|
| ZapfDingbats | `.zapf_dingbats` |
|
||||||
|
|
||||||
|
### TrueType Fonts (parsing only)
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Load TTF file
|
||||||
|
const font_data = try std.fs.cwd().readFileAlloc(allocator, "font.ttf", 10_000_000);
|
||||||
|
var ttf = try zpdf.TrueTypeFont.parse(allocator, font_data);
|
||||||
|
defer ttf.deinit();
|
||||||
|
|
||||||
|
// Get font info
|
||||||
|
std.debug.print("Family: {s}\n", .{ttf.family_name});
|
||||||
|
std.debug.print("Ascender: {d}\n", .{ttf.ascender});
|
||||||
|
|
||||||
|
// Calculate string width
|
||||||
|
const width = ttf.stringWidth("Hello", 12.0);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Font` | `src/fonts/type1.zig` | Type1 font enum |
|
||||||
|
| `TrueTypeFont` | `src/fonts/ttf.zig` | TTF parser |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 5. Colors
|
||||||
|
|
||||||
|
**File:** `src/graphics/color.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Set colors
|
||||||
|
page.setFillColor(zpdf.Color.red);
|
||||||
|
page.setStrokeColor(zpdf.Color.blue);
|
||||||
|
|
||||||
|
// RGB (0-255)
|
||||||
|
page.setFillColor(zpdf.Color.rgb(255, 128, 0));
|
||||||
|
|
||||||
|
// Hex
|
||||||
|
page.setFillColor(zpdf.Color.hex(0xFF8000));
|
||||||
|
|
||||||
|
// Grayscale (0.0-1.0)
|
||||||
|
page.setFillColor(zpdf.Color.gray(0.5));
|
||||||
|
|
||||||
|
// CMYK (0.0-1.0)
|
||||||
|
page.setFillColor(zpdf.Color.cmyk(0, 1, 1, 0)); // Red
|
||||||
|
```
|
||||||
|
|
||||||
|
### Predefined Colors
|
||||||
|
|
||||||
|
```zig
|
||||||
|
Color.black
|
||||||
|
Color.white
|
||||||
|
Color.red
|
||||||
|
Color.green
|
||||||
|
Color.blue
|
||||||
|
Color.yellow
|
||||||
|
Color.cyan
|
||||||
|
Color.magenta
|
||||||
|
Color.orange
|
||||||
|
Color.purple
|
||||||
|
Color.pink
|
||||||
|
Color.brown
|
||||||
|
Color.gray
|
||||||
|
Color.light_gray
|
||||||
|
Color.dark_gray
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Color` | `src/graphics/color.zig` | Color struct (RGB, CMYK, Gray) |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 6. Graphics
|
||||||
|
|
||||||
|
**File:** `src/page.zig`, `src/content_stream.zig`
|
||||||
|
|
||||||
|
### Lines
|
||||||
|
|
||||||
|
```zig
|
||||||
|
try page.setLineWidth(2.0);
|
||||||
|
try page.drawLine(x1, y1, x2, y2);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Rectangles
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Stroke only
|
||||||
|
try page.drawRect(x, y, width, height);
|
||||||
|
|
||||||
|
// Fill only
|
||||||
|
try page.fillRect(x, y, width, height);
|
||||||
|
|
||||||
|
// Fill and stroke
|
||||||
|
try page.fillAndStrokeRect(x, y, width, height);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Circles and Ellipses
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Circle
|
||||||
|
try page.drawCircle(cx, cy, radius);
|
||||||
|
try page.fillCircle(cx, cy, radius);
|
||||||
|
|
||||||
|
// Ellipse
|
||||||
|
try page.drawEllipse(cx, cy, rx, ry);
|
||||||
|
try page.fillEllipse(cx, cy, rx, ry);
|
||||||
|
|
||||||
|
// Arc
|
||||||
|
try page.drawArc(cx, cy, rx, ry, start_angle, end_angle);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Bezier Curves
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Cubic Bezier
|
||||||
|
try page.drawBezier(x0, y0, x1, y1, x2, y2, x3, y3);
|
||||||
|
|
||||||
|
// Quadratic Bezier
|
||||||
|
try page.drawQuadBezier(x0, y0, x1, y1, x2, y2);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Line Style
|
||||||
|
|
||||||
|
```zig
|
||||||
|
try page.setLineWidth(2.0);
|
||||||
|
try page.setLineCap(.round); // .butt, .round, .square
|
||||||
|
try page.setLineJoin(.round); // .miter, .round, .bevel
|
||||||
|
try page.setDashPattern(&.{5, 3}, 0); // [dash, gap], phase
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `ContentStream` | `src/content_stream.zig` | Low-level PDF operators |
|
||||||
|
| `LineCap` | `src/content_stream.zig` | Line cap styles |
|
||||||
|
| `LineJoin` | `src/content_stream.zig` | Line join styles |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 7. Images
|
||||||
|
|
||||||
|
**File:** `src/images/jpeg.zig`, `src/images/png.zig`, `src/images/image_info.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Load JPEG
|
||||||
|
const jpeg_idx = try pdf.addJpegImageFromFile("photo.jpg");
|
||||||
|
|
||||||
|
// Load PNG
|
||||||
|
const png_idx = try pdf.addPngImageFromFile("logo.png");
|
||||||
|
|
||||||
|
// Load from memory
|
||||||
|
const img_idx = try pdf.addJpegImage(jpeg_bytes);
|
||||||
|
const img_idx = try pdf.addPngImage(png_bytes);
|
||||||
|
|
||||||
|
// Get image info
|
||||||
|
const info = pdf.getImage(img_idx).?;
|
||||||
|
std.debug.print("Size: {d}x{d}\n", .{info.width, info.height});
|
||||||
|
|
||||||
|
// Draw image at position with size
|
||||||
|
try page.image(img_idx, info, x, y, width, height);
|
||||||
|
|
||||||
|
// Draw image preserving aspect ratio
|
||||||
|
try page.imageFit(img_idx, info, x, y, max_width, max_height);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Supported Formats
|
||||||
|
|
||||||
|
| Format | Features |
|
||||||
|
|--------|----------|
|
||||||
|
| JPEG | RGB, Grayscale |
|
||||||
|
| PNG | RGB, RGBA (with alpha), Grayscale, Indexed |
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `ImageInfo` | `src/images/image_info.zig` | Image metadata |
|
||||||
|
| `ImageFormat` | `src/images/image_info.zig` | JPEG, PNG enum |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 8. Tables
|
||||||
|
|
||||||
|
**File:** `src/table.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
const col_widths = [_]f32{ 200, 100, 100, 100 };
|
||||||
|
|
||||||
|
var table = zpdf.Table.init(page, .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 700,
|
||||||
|
.col_widths = &col_widths,
|
||||||
|
.row_height = 20,
|
||||||
|
.header_bg_color = zpdf.Color.hex(0xE0E0E0),
|
||||||
|
.border = true,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Header row
|
||||||
|
try table.header(&.{ "Description", "Qty", "Price", "Total" });
|
||||||
|
|
||||||
|
// Data rows
|
||||||
|
try table.row(&.{ "Product A", "2", "$10.00", "$20.00" });
|
||||||
|
try table.row(&.{ "Product B", "1", "$25.00", "$25.00" });
|
||||||
|
|
||||||
|
// Footer row
|
||||||
|
try table.footer(&.{ "", "", "Total:", "$45.00" });
|
||||||
|
```
|
||||||
|
|
||||||
|
### Table Options
|
||||||
|
|
||||||
|
```zig
|
||||||
|
TableOptions{
|
||||||
|
.x = 50, // X position
|
||||||
|
.y = 700, // Y position
|
||||||
|
.col_widths = &widths, // Column widths array
|
||||||
|
.row_height = 20, // Row height
|
||||||
|
.header_bg_color = Color.gray, // Header background
|
||||||
|
.row_bg_color = null, // Row background
|
||||||
|
.alt_row_bg_color = null, // Alternating row background
|
||||||
|
.border = true, // Draw borders
|
||||||
|
.header_font = .helvetica_bold, // Header font
|
||||||
|
.body_font = .helvetica, // Body font
|
||||||
|
.font_size = 10, // Font size
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Table` | `src/table.zig` | Table helper |
|
||||||
|
| `TableOptions` | `src/table.zig` | Table configuration |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 9. Links
|
||||||
|
|
||||||
|
**File:** `src/links.zig`, `src/page.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// URL link with visual styling (blue + underline)
|
||||||
|
_ = try page.urlLink(x, y, "Click here", "https://example.com");
|
||||||
|
|
||||||
|
// URL link from current position
|
||||||
|
_ = try page.writeUrlLink("Visit website", "https://example.com");
|
||||||
|
|
||||||
|
// Internal link (jump to page)
|
||||||
|
try page.addInternalLink(target_page, x, y, width, height);
|
||||||
|
|
||||||
|
// URL link without visual (just annotation)
|
||||||
|
try page.addUrlLink("https://example.com", x, y, width, height);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Link` | `src/links.zig` | Link struct |
|
||||||
|
| `PageLinks` | `src/links.zig` | Page link collection |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 10. Bookmarks
|
||||||
|
|
||||||
|
**File:** `src/outline.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Add bookmark to page
|
||||||
|
try pdf.addBookmark("Chapter 1", 0); // page index 0
|
||||||
|
|
||||||
|
// Add bookmark with Y position
|
||||||
|
try pdf.addBookmarkAt("Section 1.1", 0, 500);
|
||||||
|
```
|
||||||
|
|
||||||
|
Bookmarks appear in the PDF reader's sidebar for navigation.
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Outline` | `src/outline.zig` | Document outline |
|
||||||
|
| `OutlineItem` | `src/outline.zig` | Single bookmark |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 11. Barcodes
|
||||||
|
|
||||||
|
**File:** `src/barcodes/code128.zig`, `src/barcodes/qr.zig`
|
||||||
|
|
||||||
|
### Code128 (1D)
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Basic barcode
|
||||||
|
try page.drawCode128(x, y, "ABC-12345", height, module_width);
|
||||||
|
|
||||||
|
// Barcode with text below
|
||||||
|
try page.drawCode128WithText(x, y, "ABC-12345", height, module_width, show_text);
|
||||||
|
```
|
||||||
|
|
||||||
|
### QR Code (2D)
|
||||||
|
|
||||||
|
```zig
|
||||||
|
try page.drawQRCode(x, y, "https://example.com", size, error_correction);
|
||||||
|
|
||||||
|
// Error correction levels
|
||||||
|
zpdf.QRCode.ErrorCorrection.L // 7% recovery
|
||||||
|
zpdf.QRCode.ErrorCorrection.M // 15% recovery
|
||||||
|
zpdf.QRCode.ErrorCorrection.Q // 25% recovery
|
||||||
|
zpdf.QRCode.ErrorCorrection.H // 30% recovery
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Code128` | `src/barcodes/code128.zig` | Code128 encoder |
|
||||||
|
| `QRCode` | `src/barcodes/qr.zig` | QR Code encoder |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 12. Transformations
|
||||||
|
|
||||||
|
**File:** `src/page.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Save state before transforming
|
||||||
|
try page.saveState();
|
||||||
|
|
||||||
|
// Rotate around point (degrees)
|
||||||
|
try page.rotate(45, center_x, center_y);
|
||||||
|
|
||||||
|
// Scale from point
|
||||||
|
try page.scale(2.0, 1.5, origin_x, origin_y);
|
||||||
|
|
||||||
|
// Translate
|
||||||
|
try page.translate(100, 50);
|
||||||
|
|
||||||
|
// Skew (degrees)
|
||||||
|
try page.skew(15, 0); // X skew
|
||||||
|
try page.skew(0, 10); // Y skew
|
||||||
|
|
||||||
|
// Custom transformation matrix
|
||||||
|
try page.transform(a, b, c, d, e, f);
|
||||||
|
|
||||||
|
// Restore state
|
||||||
|
try page.restoreState();
|
||||||
|
```
|
||||||
|
|
||||||
|
**Important:** Always use `saveState()`/`restoreState()` to limit transformation scope.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 13. Transparency
|
||||||
|
|
||||||
|
**File:** `src/graphics/extgstate.zig`, `src/page.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Set fill opacity (0.0 = transparent, 1.0 = opaque)
|
||||||
|
try page.setFillOpacity(0.5);
|
||||||
|
|
||||||
|
// Set stroke opacity
|
||||||
|
try page.setStrokeOpacity(0.75);
|
||||||
|
|
||||||
|
// Set both at once
|
||||||
|
try page.setOpacity(0.3);
|
||||||
|
|
||||||
|
// Reset to fully opaque
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `ExtGState` | `src/graphics/extgstate.zig` | Extended graphics state |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 14. Gradients
|
||||||
|
|
||||||
|
**File:** `src/graphics/gradient.zig`, `src/page.zig`
|
||||||
|
|
||||||
|
### Linear Gradients
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Horizontal gradient
|
||||||
|
try page.linearGradientRect(x, y, width, height,
|
||||||
|
zpdf.Color.red, zpdf.Color.blue, .horizontal);
|
||||||
|
|
||||||
|
// Vertical gradient
|
||||||
|
try page.linearGradientRect(x, y, width, height,
|
||||||
|
zpdf.Color.green, zpdf.Color.yellow, .vertical);
|
||||||
|
|
||||||
|
// Diagonal gradient
|
||||||
|
try page.linearGradientRect(x, y, width, height,
|
||||||
|
zpdf.Color.purple, zpdf.Color.cyan, .diagonal);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Radial Gradients
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Circle gradient (center to edge)
|
||||||
|
try page.radialGradientCircle(cx, cy, radius,
|
||||||
|
zpdf.Color.white, zpdf.Color.blue);
|
||||||
|
|
||||||
|
// Ellipse gradient
|
||||||
|
try page.radialGradientEllipse(cx, cy, rx, ry,
|
||||||
|
zpdf.Color.yellow, zpdf.Color.red);
|
||||||
|
```
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Gradient` | `src/graphics/gradient.zig` | Gradient definitions |
|
||||||
|
| `LinearGradient` | `src/graphics/gradient.zig` | Linear gradient |
|
||||||
|
| `RadialGradient` | `src/graphics/gradient.zig` | Radial gradient |
|
||||||
|
| `GradientDirection` | `src/page.zig` | horizontal, vertical, diagonal |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 15. Templates
|
||||||
|
|
||||||
|
**File:** `src/template/template.zig`
|
||||||
|
|
||||||
|
Templates define reusable document layouts with named regions.
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Use predefined invoice template
|
||||||
|
var tmpl = try zpdf.Template.invoiceTemplate(allocator);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
// Or create custom template
|
||||||
|
var tmpl = zpdf.Template.init(allocator, "custom", 595, 842);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
try tmpl.defineRegion("header", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 750,
|
||||||
|
.width = 495,
|
||||||
|
.height = 80,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Use regions to position content
|
||||||
|
if (tmpl.getRegion("header")) |region| {
|
||||||
|
try page.drawText(region.x, region.y, "Header Content");
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
### Predefined Templates
|
||||||
|
|
||||||
|
- `Template.invoiceTemplate()` - Invoice with header, customer, items, totals, footer
|
||||||
|
- `Template.letterTemplate()` - Letter with sender, recipient, date, subject, body, signature
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `Template` | `src/template/template.zig` | Template struct |
|
||||||
|
| `TemplateRegion` | `src/template/template.zig` | Region definition |
|
||||||
|
| `RegionType` | `src/template/template.zig` | text, image, table, custom |
|
||||||
|
| `FixedContent` | `src/template/template.zig` | Repeating content |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 16. Markdown
|
||||||
|
|
||||||
|
**File:** `src/markdown/markdown.zig`
|
||||||
|
|
||||||
|
Parse Markdown-style text and render with appropriate styles.
|
||||||
|
|
||||||
|
```zig
|
||||||
|
var renderer = zpdf.MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse(
|
||||||
|
\\# Heading 1
|
||||||
|
\\
|
||||||
|
\\This is **bold** and *italic* text.
|
||||||
|
\\
|
||||||
|
\\- Bullet item
|
||||||
|
\\- Another item
|
||||||
|
\\
|
||||||
|
\\[Link text](https://example.com)
|
||||||
|
);
|
||||||
|
|
||||||
|
// Render to PDF
|
||||||
|
for (renderer.getLines()) |line| {
|
||||||
|
for (line.spans) |span| {
|
||||||
|
const font = zpdf.MarkdownRenderer.fontForStyle(span.style);
|
||||||
|
try page.setFont(font, span.font_size orelse 12);
|
||||||
|
|
||||||
|
if (span.color) |color| {
|
||||||
|
page.setFillColor(zpdf.Color.hex(color));
|
||||||
|
}
|
||||||
|
|
||||||
|
try page.drawText(x, y, span.text);
|
||||||
|
x += font.stringWidth(span.text, font_size);
|
||||||
|
}
|
||||||
|
y -= line_height;
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
### Supported Syntax
|
||||||
|
|
||||||
|
| Syntax | Result |
|
||||||
|
|--------|--------|
|
||||||
|
| `**text**` or `__text__` | **Bold** |
|
||||||
|
| `*text*` or `_text_` | *Italic* |
|
||||||
|
| `***text***` | ***Bold + Italic*** |
|
||||||
|
| `~~text~~` | ~~Strikethrough~~ |
|
||||||
|
| `[text](url)` | Link |
|
||||||
|
| `# Heading` | Heading 1 |
|
||||||
|
| `## Heading` | Heading 2 |
|
||||||
|
| `### Heading` | Heading 3 |
|
||||||
|
| `- item` | Bullet list |
|
||||||
|
| `1. item` | Numbered list |
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `MarkdownRenderer` | `src/markdown/markdown.zig` | Parser/renderer |
|
||||||
|
| `TextSpan` | `src/markdown/markdown.zig` | Styled text span |
|
||||||
|
| `SpanStyle` | `src/markdown/markdown.zig` | Style flags |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 17. Compression
|
||||||
|
|
||||||
|
**File:** `src/compression/zlib.zig`, `src/output/producer.zig`
|
||||||
|
|
||||||
|
```zig
|
||||||
|
// Configure compression when creating document
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{
|
||||||
|
.compression = .{
|
||||||
|
.enabled = true,
|
||||||
|
.level = 6, // 0-12, higher = better compression
|
||||||
|
.min_size = 256, // Don't compress streams smaller than this
|
||||||
|
},
|
||||||
|
});
|
||||||
|
```
|
||||||
|
|
||||||
|
### Compression Options
|
||||||
|
|
||||||
|
| Option | Default | Description |
|
||||||
|
|--------|---------|-------------|
|
||||||
|
| `enabled` | `true` | Enable FlateDecode compression |
|
||||||
|
| `level` | `6` | Compression level (0-12) |
|
||||||
|
| `min_size` | `256` | Minimum stream size to compress |
|
||||||
|
|
||||||
|
### Types
|
||||||
|
|
||||||
|
| Type | File | Description |
|
||||||
|
|------|------|-------------|
|
||||||
|
| `CompressionOptions` | `src/output/producer.zig` | Compression config |
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## File Structure
|
||||||
|
|
||||||
|
```
|
||||||
|
src/
|
||||||
|
├── root.zig # Public exports
|
||||||
|
├── pdf.zig # Pdf document facade
|
||||||
|
├── page.zig # Page with drawing methods
|
||||||
|
├── content_stream.zig # PDF operators
|
||||||
|
├── table.zig # Table helper
|
||||||
|
├── pagination.zig # Page numbers, headers, footers
|
||||||
|
├── links.zig # Link types
|
||||||
|
├── outline.zig # Bookmarks
|
||||||
|
├── fonts/
|
||||||
|
│ ├── mod.zig # Font exports
|
||||||
|
│ ├── type1.zig # 14 Type1 fonts + metrics
|
||||||
|
│ └── ttf.zig # TrueType parser
|
||||||
|
├── graphics/
|
||||||
|
│ ├── mod.zig # Graphics exports
|
||||||
|
│ ├── color.zig # Color types
|
||||||
|
│ ├── extgstate.zig # Transparency (ExtGState)
|
||||||
|
│ └── gradient.zig # Linear/Radial gradients
|
||||||
|
├── images/
|
||||||
|
│ ├── mod.zig # Image exports
|
||||||
|
│ ├── image_info.zig # ImageInfo struct
|
||||||
|
│ ├── jpeg.zig # JPEG parser
|
||||||
|
│ └── png.zig # PNG parser
|
||||||
|
├── barcodes/
|
||||||
|
│ ├── mod.zig # Barcode exports
|
||||||
|
│ ├── code128.zig # Code128 encoder
|
||||||
|
│ └── qr.zig # QR Code encoder
|
||||||
|
├── compression/
|
||||||
|
│ ├── mod.zig # Compression exports
|
||||||
|
│ └── zlib.zig # libdeflate wrapper
|
||||||
|
├── objects/
|
||||||
|
│ ├── mod.zig # Object exports
|
||||||
|
│ └── base.zig # PageSize, Orientation
|
||||||
|
├── output/
|
||||||
|
│ ├── mod.zig # Output exports
|
||||||
|
│ └── producer.zig # PDF serialization
|
||||||
|
├── security/
|
||||||
|
│ ├── mod.zig # Security exports
|
||||||
|
│ ├── rc4.zig # RC4 cipher
|
||||||
|
│ └── encryption.zig # PDF encryption
|
||||||
|
├── forms/
|
||||||
|
│ ├── mod.zig # Forms exports
|
||||||
|
│ └── field.zig # TextField, CheckBox
|
||||||
|
├── svg/
|
||||||
|
│ ├── mod.zig # SVG exports
|
||||||
|
│ └── parser.zig # SVG parser
|
||||||
|
├── template/
|
||||||
|
│ ├── mod.zig # Template exports
|
||||||
|
│ └── template.zig # Template definitions
|
||||||
|
└── markdown/
|
||||||
|
├── mod.zig # Markdown exports
|
||||||
|
└── markdown.zig # Markdown parser
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Examples
|
||||||
|
|
||||||
|
16 example files in `examples/`:
|
||||||
|
|
||||||
|
| File | Description |
|
||||||
|
|------|-------------|
|
||||||
|
| `hello.zig` | Minimal PDF |
|
||||||
|
| `invoice.zig` | Complete invoice |
|
||||||
|
| `text_demo.zig` | Text system (cell, multiCell) |
|
||||||
|
| `image_demo.zig` | JPEG and PNG images |
|
||||||
|
| `table_demo.zig` | Table helper |
|
||||||
|
| `pagination_demo.zig` | Multi-page with page numbers |
|
||||||
|
| `links_demo.zig` | Clickable links |
|
||||||
|
| `bookmarks_demo.zig` | Document outline |
|
||||||
|
| `curves_demo.zig` | Bezier, circles, arcs |
|
||||||
|
| `transforms_demo.zig` | Rotate, scale, skew |
|
||||||
|
| `transparency_demo.zig` | Opacity/alpha |
|
||||||
|
| `gradient_demo.zig` | Linear and radial gradients |
|
||||||
|
| `barcode_demo.zig` | Code128 and QR codes |
|
||||||
|
| `ttf_demo.zig` | TrueType font parsing |
|
||||||
|
| `template_demo.zig` | Document templates |
|
||||||
|
| `markdown_demo.zig` | Markdown styled text |
|
||||||
|
|
||||||
|
### Run Examples
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# Build all
|
||||||
|
zig build
|
||||||
|
|
||||||
|
# Run specific example
|
||||||
|
./zig-out/bin/hello
|
||||||
|
./zig-out/bin/invoice
|
||||||
|
./zig-out/bin/barcode_demo
|
||||||
|
# etc.
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Building
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# Build library
|
||||||
|
zig build
|
||||||
|
|
||||||
|
# Run tests
|
||||||
|
zig build test
|
||||||
|
|
||||||
|
# Build specific example
|
||||||
|
zig build hello
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## License
|
||||||
|
|
||||||
|
MIT
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Version
|
||||||
|
|
||||||
|
**v1.0** - Feature Complete (2025-12-09)
|
||||||
164
build.zig
164
build.zig
|
|
@ -4,12 +4,20 @@ pub fn build(b: *std.Build) void {
|
||||||
const target = b.standardTargetOptions(.{});
|
const target = b.standardTargetOptions(.{});
|
||||||
const optimize = b.standardOptimizeOption(.{});
|
const optimize = b.standardOptimizeOption(.{});
|
||||||
|
|
||||||
// zpdf module
|
// Get libdeflate dependency
|
||||||
|
const libdeflate_dep = b.dependency("libdeflate", .{
|
||||||
|
.target = target,
|
||||||
|
.optimize = optimize,
|
||||||
|
});
|
||||||
|
const libdeflate_lib = libdeflate_dep.artifact("deflate");
|
||||||
|
|
||||||
|
// zpdf module with libdeflate
|
||||||
const zpdf_mod = b.createModule(.{
|
const zpdf_mod = b.createModule(.{
|
||||||
.root_source_file = b.path("src/root.zig"),
|
.root_source_file = b.path("src/root.zig"),
|
||||||
.target = target,
|
.target = target,
|
||||||
.optimize = optimize,
|
.optimize = optimize,
|
||||||
});
|
});
|
||||||
|
zpdf_mod.linkLibrary(libdeflate_lib);
|
||||||
|
|
||||||
// Tests
|
// Tests
|
||||||
const unit_tests = b.addTest(.{
|
const unit_tests = b.addTest(.{
|
||||||
|
|
@ -19,16 +27,37 @@ pub fn build(b: *std.Build) void {
|
||||||
.optimize = optimize,
|
.optimize = optimize,
|
||||||
}),
|
}),
|
||||||
});
|
});
|
||||||
|
unit_tests.root_module.linkLibrary(libdeflate_lib);
|
||||||
|
|
||||||
const run_unit_tests = b.addRunArtifact(unit_tests);
|
const run_unit_tests = b.addRunArtifact(unit_tests);
|
||||||
const test_step = b.step("test", "Run unit tests");
|
const test_step = b.step("test", "Run unit tests");
|
||||||
test_step.dependOn(&run_unit_tests.step);
|
test_step.dependOn(&run_unit_tests.step);
|
||||||
|
|
||||||
// Example: hello
|
// Example executables
|
||||||
const hello_exe = b.addExecutable(.{
|
const examples = [_]struct { name: []const u8, path: []const u8, step_name: []const u8, desc: []const u8 }{
|
||||||
.name = "hello",
|
.{ .name = "hello", .path = "examples/hello.zig", .step_name = "hello", .desc = "Run hello example" },
|
||||||
|
.{ .name = "invoice", .path = "examples/invoice.zig", .step_name = "invoice", .desc = "Run invoice example" },
|
||||||
|
.{ .name = "text_demo", .path = "examples/text_demo.zig", .step_name = "text_demo", .desc = "Run text demo example" },
|
||||||
|
.{ .name = "image_demo", .path = "examples/image_demo.zig", .step_name = "image_demo", .desc = "Run image demo example" },
|
||||||
|
.{ .name = "table_demo", .path = "examples/table_demo.zig", .step_name = "table_demo", .desc = "Run table demo example" },
|
||||||
|
.{ .name = "pagination_demo", .path = "examples/pagination_demo.zig", .step_name = "pagination_demo", .desc = "Run pagination demo example" },
|
||||||
|
.{ .name = "links_demo", .path = "examples/links_demo.zig", .step_name = "links_demo", .desc = "Run links demo example" },
|
||||||
|
.{ .name = "bookmarks_demo", .path = "examples/bookmarks_demo.zig", .step_name = "bookmarks_demo", .desc = "Run bookmarks demo example" },
|
||||||
|
.{ .name = "curves_demo", .path = "examples/curves_demo.zig", .step_name = "curves_demo", .desc = "Run curves demo example" },
|
||||||
|
.{ .name = "transforms_demo", .path = "examples/transforms_demo.zig", .step_name = "transforms_demo", .desc = "Run transforms demo example" },
|
||||||
|
.{ .name = "transparency_demo", .path = "examples/transparency_demo.zig", .step_name = "transparency_demo", .desc = "Run transparency demo example" },
|
||||||
|
.{ .name = "gradient_demo", .path = "examples/gradient_demo.zig", .step_name = "gradient_demo", .desc = "Run gradient demo example" },
|
||||||
|
.{ .name = "barcode_demo", .path = "examples/barcode_demo.zig", .step_name = "barcode_demo", .desc = "Run barcode demo example" },
|
||||||
|
.{ .name = "ttf_demo", .path = "examples/ttf_demo.zig", .step_name = "ttf_demo", .desc = "Run TTF font demo example" },
|
||||||
|
.{ .name = "template_demo", .path = "examples/template_demo.zig", .step_name = "template_demo", .desc = "Run template demo example" },
|
||||||
|
.{ .name = "markdown_demo", .path = "examples/markdown_demo.zig", .step_name = "markdown_demo", .desc = "Run markdown demo example" },
|
||||||
|
};
|
||||||
|
|
||||||
|
inline for (examples) |example| {
|
||||||
|
const exe = b.addExecutable(.{
|
||||||
|
.name = example.name,
|
||||||
.root_module = b.createModule(.{
|
.root_module = b.createModule(.{
|
||||||
.root_source_file = b.path("examples/hello.zig"),
|
.root_source_file = b.path(example.path),
|
||||||
.target = target,
|
.target = target,
|
||||||
.optimize = optimize,
|
.optimize = optimize,
|
||||||
.imports = &.{
|
.imports = &.{
|
||||||
|
|
@ -36,124 +65,11 @@ pub fn build(b: *std.Build) void {
|
||||||
},
|
},
|
||||||
}),
|
}),
|
||||||
});
|
});
|
||||||
b.installArtifact(hello_exe);
|
b.installArtifact(exe);
|
||||||
|
|
||||||
const run_hello = b.addRunArtifact(hello_exe);
|
const run_cmd = b.addRunArtifact(exe);
|
||||||
run_hello.step.dependOn(b.getInstallStep());
|
run_cmd.step.dependOn(b.getInstallStep());
|
||||||
const hello_step = b.step("hello", "Run hello example");
|
const run_step = b.step(example.step_name, example.desc);
|
||||||
hello_step.dependOn(&run_hello.step);
|
run_step.dependOn(&run_cmd.step);
|
||||||
|
}
|
||||||
// Example: invoice
|
|
||||||
const invoice_exe = b.addExecutable(.{
|
|
||||||
.name = "invoice",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/invoice.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(invoice_exe);
|
|
||||||
|
|
||||||
const run_invoice = b.addRunArtifact(invoice_exe);
|
|
||||||
run_invoice.step.dependOn(b.getInstallStep());
|
|
||||||
const invoice_step = b.step("invoice", "Run invoice example");
|
|
||||||
invoice_step.dependOn(&run_invoice.step);
|
|
||||||
|
|
||||||
// Example: text_demo
|
|
||||||
const text_demo_exe = b.addExecutable(.{
|
|
||||||
.name = "text_demo",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/text_demo.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(text_demo_exe);
|
|
||||||
|
|
||||||
const run_text_demo = b.addRunArtifact(text_demo_exe);
|
|
||||||
run_text_demo.step.dependOn(b.getInstallStep());
|
|
||||||
const text_demo_step = b.step("text_demo", "Run text demo example");
|
|
||||||
text_demo_step.dependOn(&run_text_demo.step);
|
|
||||||
|
|
||||||
// Example: image_demo
|
|
||||||
const image_demo_exe = b.addExecutable(.{
|
|
||||||
.name = "image_demo",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/image_demo.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(image_demo_exe);
|
|
||||||
|
|
||||||
const run_image_demo = b.addRunArtifact(image_demo_exe);
|
|
||||||
run_image_demo.step.dependOn(b.getInstallStep());
|
|
||||||
const image_demo_step = b.step("image_demo", "Run image demo example");
|
|
||||||
image_demo_step.dependOn(&run_image_demo.step);
|
|
||||||
|
|
||||||
// Example: table_demo
|
|
||||||
const table_demo_exe = b.addExecutable(.{
|
|
||||||
.name = "table_demo",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/table_demo.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(table_demo_exe);
|
|
||||||
|
|
||||||
const run_table_demo = b.addRunArtifact(table_demo_exe);
|
|
||||||
run_table_demo.step.dependOn(b.getInstallStep());
|
|
||||||
const table_demo_step = b.step("table_demo", "Run table demo example");
|
|
||||||
table_demo_step.dependOn(&run_table_demo.step);
|
|
||||||
|
|
||||||
// Example: pagination_demo
|
|
||||||
const pagination_demo_exe = b.addExecutable(.{
|
|
||||||
.name = "pagination_demo",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/pagination_demo.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(pagination_demo_exe);
|
|
||||||
|
|
||||||
const run_pagination_demo = b.addRunArtifact(pagination_demo_exe);
|
|
||||||
run_pagination_demo.step.dependOn(b.getInstallStep());
|
|
||||||
const pagination_demo_step = b.step("pagination_demo", "Run pagination demo example");
|
|
||||||
pagination_demo_step.dependOn(&run_pagination_demo.step);
|
|
||||||
|
|
||||||
// Example: links_demo
|
|
||||||
const links_demo_exe = b.addExecutable(.{
|
|
||||||
.name = "links_demo",
|
|
||||||
.root_module = b.createModule(.{
|
|
||||||
.root_source_file = b.path("examples/links_demo.zig"),
|
|
||||||
.target = target,
|
|
||||||
.optimize = optimize,
|
|
||||||
.imports = &.{
|
|
||||||
.{ .name = "zpdf", .module = zpdf_mod },
|
|
||||||
},
|
|
||||||
}),
|
|
||||||
});
|
|
||||||
b.installArtifact(links_demo_exe);
|
|
||||||
|
|
||||||
const run_links_demo = b.addRunArtifact(links_demo_exe);
|
|
||||||
run_links_demo.step.dependOn(b.getInstallStep());
|
|
||||||
const links_demo_step = b.step("links_demo", "Run links demo example");
|
|
||||||
links_demo_step.dependOn(&run_links_demo.step);
|
|
||||||
}
|
}
|
||||||
|
|
|
||||||
12
build.zig.zon
Normal file
12
build.zig.zon
Normal file
|
|
@ -0,0 +1,12 @@
|
||||||
|
.{
|
||||||
|
.name = .zpdf,
|
||||||
|
.version = "0.15.2",
|
||||||
|
.dependencies = .{
|
||||||
|
.libdeflate = .{
|
||||||
|
.url = "https://github.com/neurocyte/libdeflate-zig/archive/refs/heads/master.tar.gz",
|
||||||
|
.hash = "libdeflate-1.18.0-1-39lN4em9CgA7RaaoDgdsyAyl1rkigFgfh5OxNBoH_zOw",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
.paths = .{""},
|
||||||
|
.fingerprint = 0xd4779d7a5ef8fe08,
|
||||||
|
}
|
||||||
119
examples/barcode_demo.zig
Normal file
119
examples/barcode_demo.zig
Normal file
|
|
@ -0,0 +1,119 @@
|
||||||
|
//! Barcode Demo - Code128 and QR barcodes
|
||||||
|
//!
|
||||||
|
//! Demonstrates barcode generation for product labels, shipping, URLs, etc.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
const Pdf = zpdf.Pdf;
|
||||||
|
const Color = zpdf.Color;
|
||||||
|
const QRCode = zpdf.QRCode;
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
var pdf = Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("Barcode Demo");
|
||||||
|
pdf.setAuthor("zpdf");
|
||||||
|
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 28);
|
||||||
|
page.setFillColor(Color.hex(0x333333));
|
||||||
|
try page.drawText(50, 780, "Barcode Demo");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(Color.hex(0x666666));
|
||||||
|
try page.drawText(50, 760, "Code128 barcode generation with zpdf");
|
||||||
|
|
||||||
|
// Reset to black for barcodes
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
|
||||||
|
// Section 1: Basic Barcodes
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
try page.drawText(50, 720, "Basic Code128 Barcodes");
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
|
||||||
|
// Simple text
|
||||||
|
try page.drawText(50, 690, "Product Code:");
|
||||||
|
try page.drawCode128WithText(170, 650, "ABC-12345", 50, 1.5, true);
|
||||||
|
|
||||||
|
// Numbers only (will use Code C for efficiency)
|
||||||
|
try page.drawText(50, 580, "Serial Number:");
|
||||||
|
try page.drawCode128WithText(170, 540, "9876543210", 50, 1.5, true);
|
||||||
|
|
||||||
|
// Mixed content
|
||||||
|
try page.drawText(50, 470, "SKU:");
|
||||||
|
try page.drawCode128WithText(170, 430, "ITEM-2024-XYZ", 50, 1.5, true);
|
||||||
|
|
||||||
|
// Section 2: Different Sizes
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
try page.drawText(50, 370, "Different Sizes");
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
|
||||||
|
// Small barcode
|
||||||
|
try page.drawText(50, 340, "Small (0.8 module):");
|
||||||
|
try page.drawCode128(170, 320, "SMALL", 30, 0.8);
|
||||||
|
|
||||||
|
// Medium barcode
|
||||||
|
try page.drawText(50, 280, "Medium (1.2 module):");
|
||||||
|
try page.drawCode128(170, 250, "MEDIUM", 40, 1.2);
|
||||||
|
|
||||||
|
// Large barcode
|
||||||
|
try page.drawText(50, 200, "Large (2.0 module):");
|
||||||
|
try page.drawCode128(170, 150, "LARGE", 60, 2.0);
|
||||||
|
|
||||||
|
// Section 3: Real-world Examples
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
try page.drawText(350, 720, "Real-world Examples");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
|
||||||
|
// Shipping label
|
||||||
|
try page.drawText(350, 690, "Shipping Label:");
|
||||||
|
try page.drawCode128WithText(350, 640, "1Z999AA10123456784", 45, 1.2, true);
|
||||||
|
|
||||||
|
// Invoice number
|
||||||
|
try page.drawText(350, 580, "Invoice #:");
|
||||||
|
try page.drawCode128WithText(350, 535, "INV-2024-00123", 40, 1.3, true);
|
||||||
|
|
||||||
|
// ISBN-like
|
||||||
|
try page.drawText(350, 470, "ISBN:");
|
||||||
|
try page.drawCode128WithText(350, 425, "978-0-123456-78-9", 45, 1.2, true);
|
||||||
|
|
||||||
|
// Warehouse location
|
||||||
|
try page.drawText(350, 360, "Location:");
|
||||||
|
try page.drawCode128WithText(350, 315, "A-12-B-34", 40, 1.5, true);
|
||||||
|
|
||||||
|
// Section 4: QR Codes
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
try page.drawText(350, 250, "QR Codes");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
|
||||||
|
// URL QR Code
|
||||||
|
try page.drawText(350, 225, "Website URL:");
|
||||||
|
try page.drawQRCode(350, 120, "HTTPS://GITHUB.COM", 100, QRCode.ErrorCorrection.M);
|
||||||
|
|
||||||
|
// Simple text
|
||||||
|
try page.drawText(480, 225, "Text Data:");
|
||||||
|
try page.drawQRCode(480, 120, "HELLO WORLD", 100, QRCode.ErrorCorrection.H);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica_oblique, 10);
|
||||||
|
page.setFillColor(Color.hex(0x999999));
|
||||||
|
try page.drawText(50, 50, "Generated with zpdf - Code128 and QR Code Support");
|
||||||
|
|
||||||
|
try pdf.save("barcode_demo.pdf");
|
||||||
|
|
||||||
|
std.debug.print("Generated barcode_demo.pdf\n", .{});
|
||||||
|
}
|
||||||
178
examples/bookmarks_demo.zig
Normal file
178
examples/bookmarks_demo.zig
Normal file
|
|
@ -0,0 +1,178 @@
|
||||||
|
//! Bookmarks Demo - PDF Document Outline
|
||||||
|
//!
|
||||||
|
//! Demonstrates how to add bookmarks (outline) to a PDF document.
|
||||||
|
//! The bookmarks appear in the sidebar of PDF readers for navigation.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const pdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("zpdf - Bookmarks Demo\n", .{});
|
||||||
|
|
||||||
|
var doc = pdf.Pdf.init(allocator, .{});
|
||||||
|
defer doc.deinit();
|
||||||
|
|
||||||
|
doc.setTitle("Bookmarks Demo");
|
||||||
|
doc.setAuthor("zpdf");
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 1: Introduction
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
page.setMargins(50, 50, 50);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica_bold, 28);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
page.setXY(50, 800);
|
||||||
|
try page.cell(0, 35, "Document with Bookmarks", pdf.Border.none, .center, false);
|
||||||
|
|
||||||
|
try doc.addBookmarkAt("Introduction", 0, 800);
|
||||||
|
|
||||||
|
page.ln(50);
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
const intro_text =
|
||||||
|
\\This document demonstrates the bookmark/outline feature of zpdf.
|
||||||
|
\\
|
||||||
|
\\Bookmarks (also called "outlines") appear in the sidebar of PDF readers
|
||||||
|
\\and allow quick navigation to different sections of the document.
|
||||||
|
\\
|
||||||
|
\\Click on the bookmarks in the sidebar to jump to each section.
|
||||||
|
;
|
||||||
|
try page.multiCell(500, null, intro_text, pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
page.setXY(50, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.cell(0, 15, "Page 1 of 4 - zpdf Bookmarks Demo", pdf.Border.none, .center, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 2: Chapter 1
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
page.setMargins(50, 50, 50);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
page.setXY(50, 800);
|
||||||
|
try page.cell(0, 30, "Chapter 1: Getting Started", pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
try doc.addBookmarkAt("Chapter 1: Getting Started", 1, 800);
|
||||||
|
|
||||||
|
page.ln(40);
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
const chapter1_text =
|
||||||
|
\\This is Chapter 1 of our document.
|
||||||
|
\\
|
||||||
|
\\In this chapter, we cover the basics of using zpdf to create
|
||||||
|
\\PDF documents with bookmarks for easy navigation.
|
||||||
|
\\
|
||||||
|
\\Key topics:
|
||||||
|
\\ - Creating a new PDF document
|
||||||
|
\\ - Adding pages
|
||||||
|
\\ - Setting fonts and colors
|
||||||
|
\\ - Adding bookmarks
|
||||||
|
;
|
||||||
|
try page.multiCell(500, null, chapter1_text, pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
page.setXY(50, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.cell(0, 15, "Page 2 of 4 - zpdf Bookmarks Demo", pdf.Border.none, .center, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 3: Chapter 2
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
page.setMargins(50, 50, 50);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(128, 0, 128));
|
||||||
|
page.setXY(50, 800);
|
||||||
|
try page.cell(0, 30, "Chapter 2: Advanced Features", pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
try doc.addBookmarkAt("Chapter 2: Advanced Features", 2, 800);
|
||||||
|
|
||||||
|
page.ln(40);
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
const chapter2_text =
|
||||||
|
\\This is Chapter 2 of our document.
|
||||||
|
\\
|
||||||
|
\\In this chapter, we explore more advanced features including:
|
||||||
|
\\ - Images (JPEG and PNG with transparency)
|
||||||
|
\\ - Tables with custom styling
|
||||||
|
\\ - Links (external URLs and internal navigation)
|
||||||
|
\\ - Compression for smaller file sizes
|
||||||
|
\\
|
||||||
|
\\These features combine to create professional-quality PDF documents.
|
||||||
|
;
|
||||||
|
try page.multiCell(500, null, chapter2_text, pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
page.setXY(50, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.cell(0, 15, "Page 3 of 4 - zpdf Bookmarks Demo", pdf.Border.none, .center, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 4: Conclusion
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
page.setMargins(50, 50, 50);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 128, 0));
|
||||||
|
page.setXY(50, 800);
|
||||||
|
try page.cell(0, 30, "Conclusion", pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
try doc.addBookmarkAt("Conclusion", 3, 800);
|
||||||
|
|
||||||
|
page.ln(40);
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
const conclusion_text =
|
||||||
|
\\This concludes our demonstration of PDF bookmarks.
|
||||||
|
\\
|
||||||
|
\\Summary of what we've learned:
|
||||||
|
\\ 1. Bookmarks provide easy document navigation
|
||||||
|
\\ 2. They appear in the PDF reader sidebar
|
||||||
|
\\ 3. Each bookmark links to a specific page and position
|
||||||
|
\\
|
||||||
|
\\Use doc.addBookmark() or doc.addBookmarkAt() to add bookmarks
|
||||||
|
\\to your zpdf documents.
|
||||||
|
;
|
||||||
|
try page.multiCell(500, null, conclusion_text, pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
page.setXY(50, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.cell(0, 15, "Page 4 of 4 - zpdf Bookmarks Demo", pdf.Border.none, .center, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Save
|
||||||
|
const filename = "bookmarks_demo.pdf";
|
||||||
|
try doc.save(filename);
|
||||||
|
|
||||||
|
std.debug.print("Created: {s} ({d} pages, {d} bookmarks)\n", .{
|
||||||
|
filename,
|
||||||
|
doc.pageCount(),
|
||||||
|
doc.bookmarkCount(),
|
||||||
|
});
|
||||||
|
std.debug.print("Done! Open the PDF and check the sidebar for bookmarks.\n", .{});
|
||||||
|
}
|
||||||
247
examples/curves_demo.zig
Normal file
247
examples/curves_demo.zig
Normal file
|
|
@ -0,0 +1,247 @@
|
||||||
|
//! Curves Demo - Bezier Curves, Circles, Ellipses, and Arcs
|
||||||
|
//!
|
||||||
|
//! Demonstrates the curve drawing capabilities of zpdf including:
|
||||||
|
//! - Cubic and quadratic Bezier curves
|
||||||
|
//! - Circles and ellipses
|
||||||
|
//! - Arcs
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const pdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("zpdf - Curves Demo\n", .{});
|
||||||
|
|
||||||
|
var doc = pdf.Pdf.init(allocator, .{});
|
||||||
|
defer doc.deinit();
|
||||||
|
|
||||||
|
doc.setTitle("Curves Demo");
|
||||||
|
doc.setAuthor("zpdf");
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 1: Bezier Curves
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
try page.drawText(50, 780, "Bezier Curves");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 11);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 755, "Cubic and quadratic Bezier curves for smooth paths");
|
||||||
|
|
||||||
|
// Cubic Bezier curve
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(220, 20, 60)); // Crimson
|
||||||
|
|
||||||
|
// Draw a smooth S-curve
|
||||||
|
try page.drawBezier(
|
||||||
|
100, 650, // Start point
|
||||||
|
150, 700, // Control point 1
|
||||||
|
250, 550, // Control point 2
|
||||||
|
300, 600, // End point
|
||||||
|
);
|
||||||
|
|
||||||
|
// Label
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(100, 520, "Cubic Bezier: S-curve");
|
||||||
|
|
||||||
|
// Draw control points and lines for visualization
|
||||||
|
try page.setLineWidth(0.5);
|
||||||
|
page.setStrokeColor(pdf.Color.light_gray);
|
||||||
|
try page.drawLine(100, 650, 150, 700);
|
||||||
|
try page.drawLine(250, 550, 300, 600);
|
||||||
|
|
||||||
|
// Control point markers
|
||||||
|
page.setFillColor(pdf.Color.rgb(100, 100, 255));
|
||||||
|
try page.fillCircle(100, 650, 4);
|
||||||
|
try page.fillCircle(150, 700, 4);
|
||||||
|
try page.fillCircle(250, 550, 4);
|
||||||
|
try page.fillCircle(300, 600, 4);
|
||||||
|
|
||||||
|
// Quadratic Bezier curve
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(50, 205, 50)); // Lime green
|
||||||
|
|
||||||
|
try page.drawQuadBezier(
|
||||||
|
350, 650, // Start point
|
||||||
|
425, 550, // Control point
|
||||||
|
500, 650, // End point
|
||||||
|
);
|
||||||
|
|
||||||
|
// Label
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(350, 520, "Quadratic Bezier: Parabola");
|
||||||
|
|
||||||
|
// Control point visualization
|
||||||
|
try page.setLineWidth(0.5);
|
||||||
|
page.setStrokeColor(pdf.Color.light_gray);
|
||||||
|
try page.drawLine(350, 650, 425, 550);
|
||||||
|
try page.drawLine(425, 550, 500, 650);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(100, 100, 255));
|
||||||
|
try page.fillCircle(350, 650, 4);
|
||||||
|
try page.fillCircle(425, 550, 4);
|
||||||
|
try page.fillCircle(500, 650, 4);
|
||||||
|
|
||||||
|
// Multiple connected curves
|
||||||
|
try page.setLineWidth(3);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(255, 140, 0)); // Dark orange
|
||||||
|
|
||||||
|
// First curve
|
||||||
|
try page.drawBezier(50, 400, 100, 450, 150, 350, 200, 400);
|
||||||
|
// Second curve (connected)
|
||||||
|
try page.drawBezier(200, 400, 250, 450, 300, 350, 350, 400);
|
||||||
|
// Third curve (connected)
|
||||||
|
try page.drawBezier(350, 400, 400, 450, 450, 350, 500, 400);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(150, 320, "Connected Bezier curves for smooth paths");
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.drawText(250, 50, "Page 1 of 2 - zpdf Curves Demo");
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 2: Circles, Ellipses, and Arcs
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
try page.drawText(50, 780, "Circles, Ellipses & Arcs");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 11);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 755, "Smooth curves approximated with cubic Bezier segments");
|
||||||
|
|
||||||
|
// Circles
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 700, "Circles");
|
||||||
|
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
|
||||||
|
// Stroke circle
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
try page.drawCircle(120, 620, 40);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(90, 565, "Stroked");
|
||||||
|
|
||||||
|
// Filled circle
|
||||||
|
page.setFillColor(pdf.Color.rgb(135, 206, 250)); // Light sky blue
|
||||||
|
try page.fillCircle(220, 620, 40);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(195, 565, "Filled");
|
||||||
|
|
||||||
|
// Fill + stroke circle
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 218, 185)); // Peach
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(205, 92, 92)); // Indian red
|
||||||
|
try page.circle(320, 620, 40, .fill_stroke);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(290, 565, "Fill+Stroke");
|
||||||
|
|
||||||
|
// Nested circles
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(128, 0, 128));
|
||||||
|
try page.setLineWidth(1);
|
||||||
|
try page.drawCircle(440, 620, 45);
|
||||||
|
try page.drawCircle(440, 620, 35);
|
||||||
|
try page.drawCircle(440, 620, 25);
|
||||||
|
try page.drawCircle(440, 620, 15);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(415, 565, "Nested");
|
||||||
|
|
||||||
|
// Ellipses
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 520, "Ellipses");
|
||||||
|
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
|
||||||
|
// Horizontal ellipse
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(255, 69, 0)); // Orange red
|
||||||
|
try page.drawEllipse(120, 450, 60, 30);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(85, 405, "Horizontal");
|
||||||
|
|
||||||
|
// Vertical ellipse
|
||||||
|
page.setFillColor(pdf.Color.rgb(147, 112, 219)); // Medium purple
|
||||||
|
try page.fillEllipse(250, 450, 30, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(225, 385, "Vertical");
|
||||||
|
|
||||||
|
// Ellipse with stroke
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 255, 224)); // Light yellow
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(184, 134, 11)); // Dark goldenrod
|
||||||
|
try page.ellipse(380, 450, 70, 35, .fill_stroke);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(345, 400, "Fill+Stroke");
|
||||||
|
|
||||||
|
// Arcs
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 340, "Arcs");
|
||||||
|
|
||||||
|
try page.setLineWidth(3);
|
||||||
|
|
||||||
|
// Quarter circle arc (0 to 90 degrees)
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(30, 144, 255)); // Dodger blue
|
||||||
|
try page.drawArc(120, 250, 50, 50, 0, 90);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(90, 185, "90 degrees");
|
||||||
|
|
||||||
|
// Half circle arc (0 to 180 degrees)
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(50, 205, 50)); // Lime green
|
||||||
|
try page.drawArc(250, 250, 50, 50, 0, 180);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(215, 185, "180 degrees");
|
||||||
|
|
||||||
|
// Three-quarter arc
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(255, 165, 0)); // Orange
|
||||||
|
try page.drawArc(380, 250, 50, 50, 45, 315);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(345, 185, "270 degrees");
|
||||||
|
|
||||||
|
// Elliptical arc
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(220, 20, 60)); // Crimson
|
||||||
|
try page.drawArc(500, 250, 40, 60, 30, 270);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(465, 175, "Elliptical arc");
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.drawText(250, 50, "Page 2 of 2 - zpdf Curves Demo");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Save
|
||||||
|
const filename = "curves_demo.pdf";
|
||||||
|
try doc.save(filename);
|
||||||
|
|
||||||
|
std.debug.print("Created: {s} ({d} pages)\n", .{ filename, doc.pageCount() });
|
||||||
|
std.debug.print("Done!\n", .{});
|
||||||
|
}
|
||||||
120
examples/gradient_demo.zig
Normal file
120
examples/gradient_demo.zig
Normal file
|
|
@ -0,0 +1,120 @@
|
||||||
|
//! Gradient Demo - Linear and Radial Gradients
|
||||||
|
//!
|
||||||
|
//! Demonstrates gradient fills for rectangles, circles and ellipses.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
const Pdf = zpdf.Pdf;
|
||||||
|
const Color = zpdf.Color;
|
||||||
|
const GradientDirection = zpdf.GradientDirection;
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
var pdf = Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("Gradient Demo");
|
||||||
|
pdf.setAuthor("zpdf");
|
||||||
|
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 28);
|
||||||
|
page.setFillColor(Color.hex(0x333333));
|
||||||
|
try page.drawText(50, 780, "Gradient Demo");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(Color.hex(0x666666));
|
||||||
|
try page.drawText(50, 760, "Linear and radial gradients in zpdf");
|
||||||
|
|
||||||
|
// Section 1: Linear Gradients
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
try page.drawText(50, 720, "Linear Gradients");
|
||||||
|
|
||||||
|
// Horizontal gradient (left to right)
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(50, 700, "Horizontal (Red to Blue)");
|
||||||
|
try page.linearGradientRect(50, 620, 150, 70, Color.red, Color.blue, .horizontal);
|
||||||
|
|
||||||
|
// Vertical gradient (bottom to top)
|
||||||
|
try page.drawText(220, 700, "Vertical (Green to Yellow)");
|
||||||
|
try page.linearGradientRect(220, 620, 150, 70, Color.green, Color.yellow, .vertical);
|
||||||
|
|
||||||
|
// Diagonal gradient
|
||||||
|
try page.drawText(390, 700, "Diagonal (Purple to Cyan)");
|
||||||
|
try page.linearGradientRect(390, 620, 150, 70, Color.hex(0x800080), Color.cyan, .diagonal);
|
||||||
|
|
||||||
|
// Section 2: Radial Gradients
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
try page.drawText(50, 580, "Radial Gradients");
|
||||||
|
|
||||||
|
// Radial gradient circle
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(50, 555, "Circle (White to Blue)");
|
||||||
|
try page.radialGradientCircle(125, 490, 50, Color.white, Color.blue);
|
||||||
|
|
||||||
|
// Radial gradient with warm colors
|
||||||
|
try page.drawText(220, 555, "Circle (Yellow to Red)");
|
||||||
|
try page.radialGradientCircle(295, 490, 50, Color.yellow, Color.red);
|
||||||
|
|
||||||
|
// Dark theme circle
|
||||||
|
try page.drawText(390, 555, "Circle (Cyan to Dark)");
|
||||||
|
try page.radialGradientCircle(465, 490, 50, Color.cyan, Color.hex(0x001122));
|
||||||
|
|
||||||
|
// Section 3: Ellipse Gradients
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
try page.drawText(50, 410, "Ellipse Gradients");
|
||||||
|
|
||||||
|
// Horizontal ellipse
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(50, 385, "Horizontal Ellipse");
|
||||||
|
try page.radialGradientEllipse(125, 330, 70, 40, Color.white, Color.hex(0xFF6600));
|
||||||
|
|
||||||
|
// Vertical ellipse
|
||||||
|
try page.drawText(220, 385, "Vertical Ellipse");
|
||||||
|
try page.radialGradientEllipse(295, 330, 40, 55, Color.hex(0xFFFF99), Color.hex(0x006600));
|
||||||
|
|
||||||
|
// Wide ellipse
|
||||||
|
try page.drawText(390, 385, "Wide Ellipse");
|
||||||
|
try page.radialGradientEllipse(465, 330, 80, 35, Color.hex(0xFFCCFF), Color.hex(0x660066));
|
||||||
|
|
||||||
|
// Section 4: Real-world examples
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
try page.drawText(50, 250, "Real-world Examples");
|
||||||
|
|
||||||
|
// Button effect with gradient
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(50, 225, "Button Effect");
|
||||||
|
try page.linearGradientRect(50, 180, 120, 35, Color.hex(0x4A90D9), Color.hex(0x2E5C8A), .vertical);
|
||||||
|
// Button text
|
||||||
|
try page.setFont(.helvetica_bold, 12);
|
||||||
|
page.setFillColor(Color.white);
|
||||||
|
try page.drawText(78, 193, "Click Me");
|
||||||
|
|
||||||
|
// Metallic effect
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
try page.drawText(200, 225, "Metallic Bar");
|
||||||
|
try page.linearGradientRect(200, 180, 120, 35, Color.hex(0xC0C0C0), Color.hex(0x606060), .vertical);
|
||||||
|
|
||||||
|
// Sunset gradient
|
||||||
|
try page.drawText(350, 225, "Sunset");
|
||||||
|
try page.linearGradientRect(350, 180, 120, 35, Color.hex(0xFF6600), Color.hex(0x330066), .horizontal);
|
||||||
|
|
||||||
|
// Orb/sphere effect
|
||||||
|
try page.drawText(500, 225, "Sphere");
|
||||||
|
try page.radialGradientCircle(535, 197, 25, Color.white, Color.hex(0x0066CC));
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica_oblique, 10);
|
||||||
|
page.setFillColor(Color.hex(0x999999));
|
||||||
|
try page.drawText(50, 50, "Generated with zpdf - Linear and Radial Gradient Support");
|
||||||
|
|
||||||
|
try pdf.save("gradient_demo.pdf");
|
||||||
|
|
||||||
|
std.debug.print("Generated gradient_demo.pdf\n", .{});
|
||||||
|
}
|
||||||
|
|
@ -1,7 +1,8 @@
|
||||||
//! Image Demo - Demonstrates JPEG image embedding
|
//! Image Demo - Demonstrates JPEG and PNG image embedding
|
||||||
//!
|
//!
|
||||||
//! Usage: ./image_demo [path_to_jpeg]
|
//! Usage: ./image_demo [path_to_image]
|
||||||
//! If no path is provided, creates a simple PDF with text explaining the feature.
|
//! Supports: JPEG (.jpg, .jpeg) and PNG (.png) images
|
||||||
|
//! If no path is provided, creates a simple PDF with text explaining the features.
|
||||||
|
|
||||||
const std = @import("std");
|
const std = @import("std");
|
||||||
const pdf = @import("zpdf");
|
const pdf = @import("zpdf");
|
||||||
|
|
@ -30,7 +31,7 @@ pub fn main() !void {
|
||||||
// Title
|
// Title
|
||||||
try page.setFont(.helvetica_bold, 24);
|
try page.setFont(.helvetica_bold, 24);
|
||||||
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
try page.cell(0, 30, "Image Demo - JPEG Support", pdf.Border.none, .center, false);
|
try page.cell(0, 30, "Image Demo - JPEG & PNG Support", pdf.Border.none, .center, false);
|
||||||
page.ln(40);
|
page.ln(40);
|
||||||
|
|
||||||
// Check if an image path was provided
|
// Check if an image path was provided
|
||||||
|
|
@ -38,8 +39,8 @@ pub fn main() !void {
|
||||||
const image_path = args[1];
|
const image_path = args[1];
|
||||||
std.debug.print("Loading image: {s}\n", .{image_path});
|
std.debug.print("Loading image: {s}\n", .{image_path});
|
||||||
|
|
||||||
// Try to load the image
|
// Try to load the image (auto-detect format)
|
||||||
const image_index = doc.addJpegImageFromFile(image_path) catch |err| {
|
const image_index = doc.addImageFromFile(image_path) catch |err| {
|
||||||
std.debug.print("Error loading image: {any}\n", .{err});
|
std.debug.print("Error loading image: {any}\n", .{err});
|
||||||
|
|
||||||
try page.setFont(.helvetica, 12);
|
try page.setFont(.helvetica, 12);
|
||||||
|
|
@ -50,12 +51,11 @@ pub fn main() !void {
|
||||||
try page.setFont(.helvetica, 10);
|
try page.setFont(.helvetica, 10);
|
||||||
page.setFillColor(pdf.Color.black);
|
page.setFillColor(pdf.Color.black);
|
||||||
const long_text =
|
const long_text =
|
||||||
\\Make sure the file exists and is a valid JPEG image.
|
\\Make sure the file exists and is a valid JPEG or PNG image.
|
||||||
\\
|
\\
|
||||||
\\Supported features:
|
\\Supported formats:
|
||||||
\\- JPEG/JPG images (RGB and Grayscale)
|
\\- JPEG/JPG images (RGB, Grayscale, CMYK)
|
||||||
\\- Direct embedding (no re-encoding)
|
\\- PNG images (RGB, RGBA, Grayscale, Indexed)
|
||||||
\\- Automatic dimension detection
|
|
||||||
;
|
;
|
||||||
try page.multiCell(450, null, long_text, pdf.Border.none, .left, false);
|
try page.multiCell(450, null, long_text, pdf.Border.none, .left, false);
|
||||||
|
|
||||||
|
|
@ -82,12 +82,20 @@ pub fn main() !void {
|
||||||
try page.cell(0, 16, size_text, pdf.Border.none, .left, false);
|
try page.cell(0, 16, size_text, pdf.Border.none, .left, false);
|
||||||
page.ln(18);
|
page.ln(18);
|
||||||
|
|
||||||
|
const format_text = std.fmt.bufPrint(&buf, "Format: {s}", .{if (img_info.format == .jpeg) "JPEG" else "PNG"}) catch "Error";
|
||||||
|
try page.cell(0, 16, format_text, pdf.Border.none, .left, false);
|
||||||
|
page.ln(18);
|
||||||
|
|
||||||
const color_text = std.fmt.bufPrint(&buf, "Color Space: {s}", .{img_info.color_space.pdfName()}) catch "Error";
|
const color_text = std.fmt.bufPrint(&buf, "Color Space: {s}", .{img_info.color_space.pdfName()}) catch "Error";
|
||||||
try page.cell(0, 16, color_text, pdf.Border.none, .left, false);
|
try page.cell(0, 16, color_text, pdf.Border.none, .left, false);
|
||||||
page.ln(18);
|
page.ln(18);
|
||||||
|
|
||||||
const bpc_text = std.fmt.bufPrint(&buf, "Bits per Component: {d}", .{img_info.bits_per_component}) catch "Error";
|
const bpc_text = std.fmt.bufPrint(&buf, "Bits per Component: {d}", .{img_info.bits_per_component}) catch "Error";
|
||||||
try page.cell(0, 16, bpc_text, pdf.Border.none, .left, false);
|
try page.cell(0, 16, bpc_text, pdf.Border.none, .left, false);
|
||||||
|
page.ln(18);
|
||||||
|
|
||||||
|
const alpha_text = std.fmt.bufPrint(&buf, "Has Alpha Channel: {s}", .{if (img_info.hasAlpha()) "Yes" else "No"}) catch "Error";
|
||||||
|
try page.cell(0, 16, alpha_text, pdf.Border.none, .left, false);
|
||||||
page.ln(30);
|
page.ln(30);
|
||||||
|
|
||||||
// Draw the image
|
// Draw the image
|
||||||
|
|
@ -115,6 +123,9 @@ pub fn main() !void {
|
||||||
try page.image(image_index, img_info, img_x, img_y, display_w, display_h);
|
try page.image(image_index, img_info, img_x, img_y, display_w, display_h);
|
||||||
|
|
||||||
std.debug.print("Image embedded: {d}x{d} pixels, displayed at {d:.0}x{d:.0} points\n", .{ img_info.width, img_info.height, display_w, display_h });
|
std.debug.print("Image embedded: {d}x{d} pixels, displayed at {d:.0}x{d:.0} points\n", .{ img_info.width, img_info.height, display_w, display_h });
|
||||||
|
if (img_info.hasAlpha()) {
|
||||||
|
std.debug.print("Alpha channel: embedded as soft mask\n", .{});
|
||||||
|
}
|
||||||
} else {
|
} else {
|
||||||
// No image provided - show instructions
|
// No image provided - show instructions
|
||||||
try page.setFont(.helvetica_bold, 14);
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
|
@ -124,10 +135,13 @@ pub fn main() !void {
|
||||||
|
|
||||||
try page.setFont(.helvetica, 11);
|
try page.setFont(.helvetica, 11);
|
||||||
const instructions =
|
const instructions =
|
||||||
\\To include a JPEG image in your PDF:
|
\\To include an image in your PDF:
|
||||||
\\
|
\\
|
||||||
\\1. Load the image file:
|
\\1. Load the image file (auto-detects format):
|
||||||
\\ const img_idx = try doc.addJpegImageFromFile("photo.jpg");
|
\\ const img_idx = try doc.addImageFromFile("photo.jpg");
|
||||||
|
\\ // Or specifically:
|
||||||
|
\\ const jpg_idx = try doc.addJpegImageFromFile("photo.jpg");
|
||||||
|
\\ const png_idx = try doc.addPngImageFromFile("image.png");
|
||||||
\\
|
\\
|
||||||
\\2. Get the image info:
|
\\2. Get the image info:
|
||||||
\\ const info = doc.getImage(img_idx).?;
|
\\ const info = doc.getImage(img_idx).?;
|
||||||
|
|
@ -138,8 +152,9 @@ pub fn main() !void {
|
||||||
\\Or use imageFit to auto-scale:
|
\\Or use imageFit to auto-scale:
|
||||||
\\ try page.imageFit(img_idx, info, x, y, max_w, max_h);
|
\\ try page.imageFit(img_idx, info, x, y, max_w, max_h);
|
||||||
\\
|
\\
|
||||||
\\Run this example with a JPEG file path:
|
\\Run this example with an image file path:
|
||||||
\\ ./image_demo photo.jpg
|
\\ ./image_demo photo.jpg
|
||||||
|
\\ ./image_demo logo.png
|
||||||
;
|
;
|
||||||
try page.multiCell(450, null, instructions, pdf.Border.all, .left, false);
|
try page.multiCell(450, null, instructions, pdf.Border.all, .left, false);
|
||||||
|
|
||||||
|
|
@ -151,6 +166,8 @@ pub fn main() !void {
|
||||||
page.ln(25);
|
page.ln(25);
|
||||||
|
|
||||||
try page.setFont(.helvetica, 11);
|
try page.setFont(.helvetica, 11);
|
||||||
|
|
||||||
|
// JPEG Features
|
||||||
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
page.setFillColor(pdf.Color.black);
|
page.setFillColor(pdf.Color.black);
|
||||||
|
|
@ -160,13 +177,33 @@ pub fn main() !void {
|
||||||
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
page.setFillColor(pdf.Color.black);
|
page.setFillColor(pdf.Color.black);
|
||||||
try page.cell(0, 16, "Direct passthrough (no re-encoding)", pdf.Border.none, .left, false);
|
try page.cell(0, 16, "JPEG direct passthrough (no re-encoding)", pdf.Border.none, .left, false);
|
||||||
|
page.ln(18);
|
||||||
|
|
||||||
|
// PNG Features
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.cell(0, 16, "PNG images (RGB, RGBA, Grayscale, Indexed)", pdf.Border.none, .left, false);
|
||||||
page.ln(18);
|
page.ln(18);
|
||||||
|
|
||||||
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
page.setFillColor(pdf.Color.black);
|
page.setFillColor(pdf.Color.black);
|
||||||
try page.cell(0, 16, "Automatic dimension detection", pdf.Border.none, .left, false);
|
try page.cell(0, 16, "PNG transparency (alpha channel as soft mask)", pdf.Border.none, .left, false);
|
||||||
|
page.ln(18);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.cell(0, 16, "PNG filters (None, Sub, Up, Average, Paeth)", pdf.Border.none, .left, false);
|
||||||
|
page.ln(18);
|
||||||
|
|
||||||
|
// General features
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
try page.cell(20, 16, "[OK]", pdf.Border.none, .left, false);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.cell(0, 16, "Automatic format detection", pdf.Border.none, .left, false);
|
||||||
page.ln(18);
|
page.ln(18);
|
||||||
|
|
||||||
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
|
@ -175,10 +212,11 @@ pub fn main() !void {
|
||||||
try page.cell(0, 16, "Aspect ratio preservation", pdf.Border.none, .left, false);
|
try page.cell(0, 16, "Aspect ratio preservation", pdf.Border.none, .left, false);
|
||||||
page.ln(18);
|
page.ln(18);
|
||||||
|
|
||||||
|
// Not yet supported
|
||||||
page.setFillColor(pdf.Color.rgb(255, 165, 0));
|
page.setFillColor(pdf.Color.rgb(255, 165, 0));
|
||||||
try page.cell(20, 16, "[--]", pdf.Border.none, .left, false);
|
try page.cell(20, 16, "[--]", pdf.Border.none, .left, false);
|
||||||
page.setFillColor(pdf.Color.black);
|
page.setFillColor(pdf.Color.black);
|
||||||
try page.cell(0, 16, "PNG images (metadata only, not yet embedded)", pdf.Border.none, .left, false);
|
try page.cell(0, 16, "PNG interlaced images (not supported)", pdf.Border.none, .left, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
// Footer
|
// Footer
|
||||||
|
|
|
||||||
183
examples/markdown_demo.zig
Normal file
183
examples/markdown_demo.zig
Normal file
|
|
@ -0,0 +1,183 @@
|
||||||
|
//! Markdown Demo - Rendering styled text with Markdown syntax
|
||||||
|
//!
|
||||||
|
//! Run with: zig build markdown_demo && ./zig-out/bin/markdown_demo
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("=== zpdf Markdown Demo ===\n\n", .{});
|
||||||
|
|
||||||
|
// Create PDF
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("Markdown Styled Document");
|
||||||
|
pdf.setAuthor("zpdf Markdown Renderer");
|
||||||
|
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
// Sample markdown text
|
||||||
|
const markdown_text =
|
||||||
|
\\# Welcome to zpdf Markdown
|
||||||
|
\\
|
||||||
|
\\This is a demonstration of **Markdown-styled** text rendering in PDF.
|
||||||
|
\\
|
||||||
|
\\## Features
|
||||||
|
\\
|
||||||
|
\\The renderer supports the following formatting:
|
||||||
|
\\
|
||||||
|
\\- **Bold text** using double asterisks
|
||||||
|
\\- *Italic text* using single asterisks
|
||||||
|
\\- ***Bold and italic*** combined
|
||||||
|
\\- ~~Strikethrough~~ using tildes
|
||||||
|
\\- [Clickable links](https://github.com)
|
||||||
|
\\
|
||||||
|
\\### Code and Technical Content
|
||||||
|
\\
|
||||||
|
\\You can write technical documentation with styled text.
|
||||||
|
\\For example, the *zpdf* library is written in **Zig** and provides
|
||||||
|
\\a simple API for PDF generation.
|
||||||
|
\\
|
||||||
|
\\## Numbered Lists
|
||||||
|
\\
|
||||||
|
\\1. First item in the list
|
||||||
|
\\2. Second item with **bold** text
|
||||||
|
\\3. Third item with a [link](https://example.com)
|
||||||
|
\\
|
||||||
|
\\### Conclusion
|
||||||
|
\\
|
||||||
|
\\The Markdown renderer makes it easy to create styled documents
|
||||||
|
\\without manually managing fonts and styles.
|
||||||
|
;
|
||||||
|
|
||||||
|
// Parse markdown
|
||||||
|
var renderer = zpdf.MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse(markdown_text);
|
||||||
|
|
||||||
|
std.debug.print("Parsed {d} lines of Markdown\n", .{renderer.getLines().len});
|
||||||
|
|
||||||
|
// Render to PDF
|
||||||
|
const base_font_size: f32 = 11;
|
||||||
|
const line_height: f32 = 16;
|
||||||
|
const left_margin: f32 = 50;
|
||||||
|
const bullet_indent: f32 = 20;
|
||||||
|
var y: f32 = 780;
|
||||||
|
|
||||||
|
var list_number: u32 = 0;
|
||||||
|
|
||||||
|
for (renderer.getLines()) |line| {
|
||||||
|
// Handle blank lines
|
||||||
|
if (line.line_type == .blank) {
|
||||||
|
y -= line_height;
|
||||||
|
list_number = 0;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Calculate y position based on line type
|
||||||
|
const extra_spacing: f32 = switch (line.line_type) {
|
||||||
|
.heading1 => 20,
|
||||||
|
.heading2 => 15,
|
||||||
|
.heading3 => 10,
|
||||||
|
else => 0,
|
||||||
|
};
|
||||||
|
y -= extra_spacing;
|
||||||
|
|
||||||
|
// Handle list prefixes
|
||||||
|
var x: f32 = left_margin;
|
||||||
|
switch (line.line_type) {
|
||||||
|
.bullet => {
|
||||||
|
try page.setFont(.helvetica, base_font_size);
|
||||||
|
page.setFillColor(zpdf.Color.black);
|
||||||
|
try page.drawText(x, y, "\xe2\x80\xa2"); // Bullet point (UTF-8)
|
||||||
|
// Note: PDF Type1 fonts don't support UTF-8, so we use a simple dash
|
||||||
|
try page.drawText(x, y, "-");
|
||||||
|
x += bullet_indent;
|
||||||
|
list_number = 0;
|
||||||
|
},
|
||||||
|
.numbered => {
|
||||||
|
list_number += 1;
|
||||||
|
try page.setFont(.helvetica, base_font_size);
|
||||||
|
page.setFillColor(zpdf.Color.black);
|
||||||
|
var num_buf: [16]u8 = undefined;
|
||||||
|
const num_str = std.fmt.bufPrint(&num_buf, "{d}.", .{list_number}) catch "?.";
|
||||||
|
try page.drawText(x, y, num_str);
|
||||||
|
x += bullet_indent;
|
||||||
|
},
|
||||||
|
else => {
|
||||||
|
list_number = 0;
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
// Render spans
|
||||||
|
for (line.spans) |span| {
|
||||||
|
// Set font based on style
|
||||||
|
const font = zpdf.MarkdownRenderer.fontForStyle(span.style);
|
||||||
|
const font_size = span.font_size orelse base_font_size;
|
||||||
|
|
||||||
|
try page.setFont(font, font_size);
|
||||||
|
|
||||||
|
// Set color
|
||||||
|
if (span.color) |color| {
|
||||||
|
page.setFillColor(zpdf.Color.hex(color));
|
||||||
|
} else {
|
||||||
|
page.setFillColor(zpdf.Color.black);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Draw text
|
||||||
|
try page.drawText(x, y, span.text);
|
||||||
|
|
||||||
|
// Draw underline if needed
|
||||||
|
if (span.style.underline) {
|
||||||
|
const text_width = font.stringWidth(span.text, font_size);
|
||||||
|
page.setStrokeColor(if (span.color) |c| zpdf.Color.hex(c) else zpdf.Color.black);
|
||||||
|
try page.setLineWidth(0.5);
|
||||||
|
try page.drawLine(x, y - 2, x + text_width, y - 2);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Draw strikethrough if needed
|
||||||
|
if (span.style.strikethrough) {
|
||||||
|
const text_width = font.stringWidth(span.text, font_size);
|
||||||
|
page.setStrokeColor(zpdf.Color.black);
|
||||||
|
try page.setLineWidth(0.5);
|
||||||
|
const strike_y = y + font_size * 0.3;
|
||||||
|
try page.drawLine(x, strike_y, x + text_width, strike_y);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Advance x position
|
||||||
|
x += font.stringWidth(span.text, font_size);
|
||||||
|
|
||||||
|
// Add link annotation if present
|
||||||
|
if (span.url) |url| {
|
||||||
|
const text_width = font.stringWidth(span.text, font_size);
|
||||||
|
try page.addUrlLink(url, x - text_width, y - 2, text_width, font_size + 4);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Move to next line
|
||||||
|
const line_font_size: f32 = if (line.spans.len > 0 and line.spans[0].font_size != null)
|
||||||
|
line.spans[0].font_size.?
|
||||||
|
else
|
||||||
|
base_font_size;
|
||||||
|
y -= line_font_size + 4;
|
||||||
|
|
||||||
|
// Add extra space after headings
|
||||||
|
y -= extra_spacing / 2;
|
||||||
|
|
||||||
|
// Check for page break
|
||||||
|
if (y < 80) {
|
||||||
|
page = try pdf.addPage(.{});
|
||||||
|
y = 780;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Save
|
||||||
|
try pdf.save("markdown_demo.pdf");
|
||||||
|
std.debug.print("Saved: markdown_demo.pdf\n", .{});
|
||||||
|
}
|
||||||
225
examples/template_demo.zig
Normal file
225
examples/template_demo.zig
Normal file
|
|
@ -0,0 +1,225 @@
|
||||||
|
//! Template Demo - Using predefined document templates
|
||||||
|
//!
|
||||||
|
//! Run with: zig build template_demo && ./zig-out/bin/template_demo
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("=== zpdf Template Demo ===\n\n", .{});
|
||||||
|
|
||||||
|
// Create invoice using template
|
||||||
|
try createInvoiceFromTemplate(allocator);
|
||||||
|
|
||||||
|
// Create letter using template
|
||||||
|
try createLetterFromTemplate(allocator);
|
||||||
|
|
||||||
|
std.debug.print("\nTemplate demo completed successfully!\n", .{});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn createInvoiceFromTemplate(allocator: std.mem.Allocator) !void {
|
||||||
|
std.debug.print("Creating invoice from template...\n", .{});
|
||||||
|
|
||||||
|
// Get the invoice template
|
||||||
|
var tmpl = try zpdf.Template.invoiceTemplate(allocator);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
std.debug.print(" Template: {s}\n", .{tmpl.name});
|
||||||
|
std.debug.print(" Page size: {d:.0} x {d:.0} points\n", .{ tmpl.page_width, tmpl.page_height });
|
||||||
|
|
||||||
|
// Create PDF based on template
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("Invoice from Template");
|
||||||
|
|
||||||
|
var page = try pdf.addPageCustom(tmpl.page_width, tmpl.page_height);
|
||||||
|
|
||||||
|
// Use template regions to position content
|
||||||
|
if (tmpl.getRegion("header")) |region| {
|
||||||
|
std.debug.print(" Header region: ({d:.0}, {d:.0}) {d:.0}x{d:.0}\n", .{ region.x, region.y, region.width, region.height });
|
||||||
|
try page.setFont(.helvetica_bold, 20);
|
||||||
|
try page.drawText(region.x, region.y, "ACME Corporation");
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y - 15, "123 Business Street");
|
||||||
|
try page.drawText(region.x, region.y - 27, "Tech City, TC 12345");
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmpl.getRegion("invoice_info")) |region| {
|
||||||
|
std.debug.print(" Invoice info region: ({d:.0}, {d:.0})\n", .{ region.x, region.y });
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
try page.drawText(region.x, region.y, "INVOICE #2024-001");
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y - 15, "Date: December 9, 2024");
|
||||||
|
try page.drawText(region.x, region.y - 27, "Due: December 23, 2024");
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmpl.getRegion("customer")) |region| {
|
||||||
|
std.debug.print(" Customer region: ({d:.0}, {d:.0})\n", .{ region.x, region.y });
|
||||||
|
try page.setFont(.helvetica_bold, 12);
|
||||||
|
try page.drawText(region.x, region.y, "Bill To:");
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y - 15, "Customer Company Ltd.");
|
||||||
|
try page.drawText(region.x, region.y - 27, "456 Client Avenue");
|
||||||
|
try page.drawText(region.x, region.y - 39, "Business Town, BT 67890");
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmpl.getRegion("items")) |region| {
|
||||||
|
std.debug.print(" Items region: ({d:.0}, {d:.0}) {d:.0}x{d:.0}\n", .{ region.x, region.y, region.width, region.height });
|
||||||
|
|
||||||
|
// Draw table header
|
||||||
|
page.setFillColor(zpdf.Color.hex(0xE0E0E0));
|
||||||
|
try page.fillRect(region.x, region.y + region.height - 25, region.width, 25);
|
||||||
|
|
||||||
|
page.setFillColor(zpdf.Color.black);
|
||||||
|
try page.setFont(.helvetica_bold, 10);
|
||||||
|
try page.drawText(region.x + 5, region.y + region.height - 17, "Description");
|
||||||
|
try page.drawText(region.x + 250, region.y + region.height - 17, "Qty");
|
||||||
|
try page.drawText(region.x + 320, region.y + region.height - 17, "Price");
|
||||||
|
try page.drawText(region.x + 420, region.y + region.height - 17, "Total");
|
||||||
|
|
||||||
|
// Draw table rows
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
const items = [_]struct { desc: []const u8, qty: []const u8, price: []const u8, total: []const u8 }{
|
||||||
|
.{ .desc = "Web Development Services", .qty = "40", .price = "$75.00", .total = "$3,000.00" },
|
||||||
|
.{ .desc = "UI/UX Design", .qty = "20", .price = "$85.00", .total = "$1,700.00" },
|
||||||
|
.{ .desc = "Server Hosting (1 year)", .qty = "1", .price = "$500.00", .total = "$500.00" },
|
||||||
|
};
|
||||||
|
|
||||||
|
var y_offset: f32 = region.y + region.height - 45;
|
||||||
|
for (items) |item| {
|
||||||
|
try page.drawText(region.x + 5, y_offset, item.desc);
|
||||||
|
try page.drawText(region.x + 250, y_offset, item.qty);
|
||||||
|
try page.drawText(region.x + 320, y_offset, item.price);
|
||||||
|
try page.drawText(region.x + 420, y_offset, item.total);
|
||||||
|
y_offset -= 20;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Draw table border
|
||||||
|
page.setStrokeColor(zpdf.Color.black);
|
||||||
|
try page.drawRect(region.x, region.y, region.width, region.height);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmpl.getRegion("totals")) |region| {
|
||||||
|
std.debug.print(" Totals region: ({d:.0}, {d:.0})\n", .{ region.x, region.y });
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y + 60, "Subtotal:");
|
||||||
|
try page.drawText(region.x + 100, region.y + 60, "$5,200.00");
|
||||||
|
try page.drawText(region.x, region.y + 45, "Tax (10%):");
|
||||||
|
try page.drawText(region.x + 100, region.y + 45, "$520.00");
|
||||||
|
|
||||||
|
try page.setLineWidth(1);
|
||||||
|
try page.drawLine(region.x, region.y + 35, region.x + region.width, region.y + 35);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica_bold, 12);
|
||||||
|
try page.drawText(region.x, region.y + 20, "TOTAL:");
|
||||||
|
try page.drawText(region.x + 100, region.y + 20, "$5,720.00");
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmpl.getRegion("footer")) |region| {
|
||||||
|
std.debug.print(" Footer region: ({d:.0}, {d:.0})\n", .{ region.x, region.y });
|
||||||
|
try page.setFont(.helvetica, 8);
|
||||||
|
page.setFillColor(zpdf.Color.hex(0x666666));
|
||||||
|
try page.drawText(region.x, region.y + 20, "Payment Terms: Net 14 days");
|
||||||
|
try page.drawText(region.x, region.y + 8, "Thank you for your business!");
|
||||||
|
}
|
||||||
|
|
||||||
|
try pdf.save("template_invoice.pdf");
|
||||||
|
std.debug.print(" Saved: template_invoice.pdf\n", .{});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn createLetterFromTemplate(allocator: std.mem.Allocator) !void {
|
||||||
|
std.debug.print("\nCreating letter from template...\n", .{});
|
||||||
|
|
||||||
|
// Get the letter template
|
||||||
|
var tmpl = try zpdf.Template.letterTemplate(allocator);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
std.debug.print(" Template: {s}\n", .{tmpl.name});
|
||||||
|
|
||||||
|
// Create PDF based on template
|
||||||
|
var pdf = zpdf.Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("Letter from Template");
|
||||||
|
|
||||||
|
var page = try pdf.addPageCustom(tmpl.page_width, tmpl.page_height);
|
||||||
|
|
||||||
|
// Sender
|
||||||
|
if (tmpl.getRegion("sender")) |region| {
|
||||||
|
try page.setFont(.helvetica_bold, 11);
|
||||||
|
try page.drawText(region.x, region.y, "John Smith");
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y - 14, "123 Sender Street");
|
||||||
|
try page.drawText(region.x, region.y - 26, "City, ST 12345");
|
||||||
|
try page.drawText(region.x, region.y - 38, "john@example.com");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Date
|
||||||
|
if (tmpl.getRegion("date")) |region| {
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y, "December 9, 2024");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Recipient
|
||||||
|
if (tmpl.getRegion("recipient")) |region| {
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y, "Ms. Jane Doe");
|
||||||
|
try page.drawText(region.x, region.y - 14, "456 Recipient Avenue");
|
||||||
|
try page.drawText(region.x, region.y - 26, "Town, ST 67890");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Subject
|
||||||
|
if (tmpl.getRegion("subject")) |region| {
|
||||||
|
try page.setFont(.helvetica_bold, 11);
|
||||||
|
try page.drawText(region.x, region.y, "Re: Project Proposal Discussion");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Body
|
||||||
|
if (tmpl.getRegion("body")) |region| {
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
const line_height: f32 = 14;
|
||||||
|
var y = region.y + region.height;
|
||||||
|
|
||||||
|
try page.drawText(region.x, y, "Dear Ms. Doe,");
|
||||||
|
y -= line_height * 2;
|
||||||
|
|
||||||
|
try page.drawText(region.x, y, "I am writing to follow up on our recent conversation regarding the");
|
||||||
|
y -= line_height;
|
||||||
|
try page.drawText(region.x, y, "proposed collaboration between our organizations. I believe there is");
|
||||||
|
y -= line_height;
|
||||||
|
try page.drawText(region.x, y, "significant potential for a mutually beneficial partnership.");
|
||||||
|
y -= line_height * 2;
|
||||||
|
|
||||||
|
try page.drawText(region.x, y, "As discussed, I have prepared a detailed proposal outlining the scope");
|
||||||
|
y -= line_height;
|
||||||
|
try page.drawText(region.x, y, "of work, timeline, and expected outcomes. I would be happy to schedule");
|
||||||
|
y -= line_height;
|
||||||
|
try page.drawText(region.x, y, "a meeting at your earliest convenience to discuss this further.");
|
||||||
|
y -= line_height * 2;
|
||||||
|
|
||||||
|
try page.drawText(region.x, y, "Please do not hesitate to contact me if you have any questions or");
|
||||||
|
y -= line_height;
|
||||||
|
try page.drawText(region.x, y, "require additional information.");
|
||||||
|
y -= line_height * 2;
|
||||||
|
|
||||||
|
try page.drawText(region.x, y, "Thank you for your time and consideration.");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Signature
|
||||||
|
if (tmpl.getRegion("signature")) |region| {
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y + 50, "Sincerely,");
|
||||||
|
try page.setFont(.helvetica_bold, 10);
|
||||||
|
try page.drawText(region.x, region.y + 20, "John Smith");
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
try page.drawText(region.x, region.y + 6, "Senior Consultant");
|
||||||
|
}
|
||||||
|
|
||||||
|
try pdf.save("template_letter.pdf");
|
||||||
|
std.debug.print(" Saved: template_letter.pdf\n", .{});
|
||||||
|
}
|
||||||
335
examples/transforms_demo.zig
Normal file
335
examples/transforms_demo.zig
Normal file
|
|
@ -0,0 +1,335 @@
|
||||||
|
//! Transforms Demo - Rotation, Scaling, Skew, and Translation
|
||||||
|
//!
|
||||||
|
//! Demonstrates the transformation capabilities of zpdf including:
|
||||||
|
//! - Rotation around a point
|
||||||
|
//! - Scaling from a point
|
||||||
|
//! - Skewing (shearing)
|
||||||
|
//! - Translation
|
||||||
|
//! - Combined transformations
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const pdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("zpdf - Transforms Demo\n", .{});
|
||||||
|
|
||||||
|
var doc = pdf.Pdf.init(allocator, .{});
|
||||||
|
defer doc.deinit();
|
||||||
|
|
||||||
|
doc.setTitle("Transforms Demo");
|
||||||
|
doc.setAuthor("zpdf");
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 1: Rotation
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
try page.drawText(50, 780, "Rotation Transforms");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 11);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 755, "Rotate graphics around a specified point");
|
||||||
|
|
||||||
|
// Original rectangle (for reference)
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(100, 680, "Original:");
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(200, 200, 200));
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.setLineWidth(1);
|
||||||
|
try page.drawFilledRect(100, 600, 80, 60);
|
||||||
|
|
||||||
|
// Draw rotation center marker
|
||||||
|
page.setFillColor(pdf.Color.red);
|
||||||
|
try page.fillCircle(140, 630, 3);
|
||||||
|
|
||||||
|
// Rotated rectangles
|
||||||
|
const angles = [_]f32{ 15, 30, 45, 60 };
|
||||||
|
const colors = [_]pdf.Color{
|
||||||
|
pdf.Color.rgb(255, 100, 100),
|
||||||
|
pdf.Color.rgb(100, 255, 100),
|
||||||
|
pdf.Color.rgb(100, 100, 255),
|
||||||
|
pdf.Color.rgb(255, 200, 100),
|
||||||
|
};
|
||||||
|
|
||||||
|
var x: f32 = 250;
|
||||||
|
for (angles, colors) |angle, color| {
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
|
||||||
|
var angle_buf: [32]u8 = undefined;
|
||||||
|
const angle_str = std.fmt.bufPrint(&angle_buf, "{d} degrees", .{@as(i32, @intFromFloat(angle))}) catch "angle";
|
||||||
|
try page.drawText(x, 680, angle_str);
|
||||||
|
|
||||||
|
// Save state before transformation
|
||||||
|
try page.saveState();
|
||||||
|
|
||||||
|
// Rotate around center of rectangle
|
||||||
|
const cx = x + 40;
|
||||||
|
const cy: f32 = 630;
|
||||||
|
try page.rotate(angle, cx, cy);
|
||||||
|
|
||||||
|
// Draw rectangle
|
||||||
|
page.setFillColor(color);
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.drawFilledRect(x, 600, 80, 60);
|
||||||
|
|
||||||
|
// Restore state
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
// Draw center point
|
||||||
|
page.setFillColor(pdf.Color.red);
|
||||||
|
try page.fillCircle(cx, cy, 3);
|
||||||
|
|
||||||
|
x += 100;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Rotated text example
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 520, "Rotated Text:");
|
||||||
|
|
||||||
|
const text_angles = [_]f32{ 0, 15, 30, 45, 90 };
|
||||||
|
x = 100;
|
||||||
|
for (text_angles) |angle| {
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(angle, x, 450);
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 100, 150));
|
||||||
|
try page.drawText(x, 450, "Hello!");
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
x += 80;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Multiple rotations around same point (like clock hands)
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 350, "Clock-like Rotation:");
|
||||||
|
|
||||||
|
const clock_cx: f32 = 200;
|
||||||
|
const clock_cy: f32 = 250;
|
||||||
|
|
||||||
|
// Draw clock circle
|
||||||
|
page.setStrokeColor(pdf.Color.dark_gray);
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
try page.drawCircle(clock_cx, clock_cy, 80);
|
||||||
|
|
||||||
|
// Draw hour marks
|
||||||
|
try page.setLineWidth(1);
|
||||||
|
for (0..12) |i| {
|
||||||
|
const fi: f32 = @floatFromInt(i);
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(fi * 30, clock_cx, clock_cy);
|
||||||
|
|
||||||
|
page.setStrokeColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawLine(clock_cx, clock_cy + 70, clock_cx, clock_cy + 80);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Draw clock hands
|
||||||
|
try page.setLineWidth(3);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(50, 50, 150));
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(60, clock_cx, clock_cy); // Hour hand at ~2 o'clock
|
||||||
|
try page.drawLine(clock_cx, clock_cy, clock_cx, clock_cy + 45);
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(150, 50, 50));
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(210, clock_cx, clock_cy); // Minute hand at ~7 o'clock
|
||||||
|
try page.drawLine(clock_cx, clock_cy, clock_cx, clock_cy + 65);
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.drawText(250, 50, "Page 1 of 2 - zpdf Transforms Demo");
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Page 2: Scale, Skew, and Combined Transforms
|
||||||
|
// =========================================================================
|
||||||
|
{
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
try page.drawText(50, 780, "Scale, Skew & Combined");
|
||||||
|
|
||||||
|
// Scaling section
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 720, "Scaling:");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(50, 700, "Scale graphics from a reference point");
|
||||||
|
|
||||||
|
// Original
|
||||||
|
page.setFillColor(pdf.Color.light_gray);
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.setLineWidth(1);
|
||||||
|
try page.drawFilledRect(80, 620, 40, 40);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(80, 600, "1.0x");
|
||||||
|
|
||||||
|
// Scaled versions
|
||||||
|
const scales = [_]struct { sx: f32, sy: f32, label: []const u8 }{
|
||||||
|
.{ .sx = 1.5, .sy = 1.5, .label = "1.5x" },
|
||||||
|
.{ .sx = 0.5, .sy = 0.5, .label = "0.5x" },
|
||||||
|
.{ .sx = 2.0, .sy = 1.0, .label = "2x,1x" },
|
||||||
|
.{ .sx = 1.0, .sy = 2.0, .label = "1x,2x" },
|
||||||
|
};
|
||||||
|
|
||||||
|
var x: f32 = 160;
|
||||||
|
for (scales) |s| {
|
||||||
|
try page.saveState();
|
||||||
|
try page.scale(s.sx, s.sy, x + 20, 640);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(100, 200, 150));
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.drawFilledRect(x, 620, 40, 40);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(x, 600, s.label);
|
||||||
|
|
||||||
|
x += 100;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Skewing section
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 540, "Skewing:");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(50, 520, "Skew (shear) graphics along X or Y axis");
|
||||||
|
|
||||||
|
// Original
|
||||||
|
page.setFillColor(pdf.Color.light_gray);
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.drawFilledRect(80, 440, 50, 50);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(80, 420, "Original");
|
||||||
|
|
||||||
|
// Skewed versions
|
||||||
|
const skews = [_]struct { sx: f32, sy: f32, label: []const u8 }{
|
||||||
|
.{ .sx = 15, .sy = 0, .label = "X: 15 deg" },
|
||||||
|
.{ .sx = 30, .sy = 0, .label = "X: 30 deg" },
|
||||||
|
.{ .sx = 0, .sy = 15, .label = "Y: 15 deg" },
|
||||||
|
.{ .sx = 15, .sy = 15, .label = "XY: 15 deg" },
|
||||||
|
};
|
||||||
|
|
||||||
|
x = 170;
|
||||||
|
for (skews) |s| {
|
||||||
|
try page.saveState();
|
||||||
|
try page.translate(x, 465);
|
||||||
|
try page.skew(s.sx, s.sy);
|
||||||
|
try page.translate(-x, -465);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(200, 150, 100));
|
||||||
|
page.setStrokeColor(pdf.Color.black);
|
||||||
|
try page.drawFilledRect(x, 440, 50, 50);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(x, 420, s.label);
|
||||||
|
|
||||||
|
x += 100;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Combined transforms section
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 360, "Combined Transforms:");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 10);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(50, 340, "Multiple transformations applied in sequence");
|
||||||
|
|
||||||
|
// Example 1: Rotate + Scale
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(30, 150, 260);
|
||||||
|
try page.scale(1.5, 1.5, 150, 260);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 150, 150));
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(200, 0, 0));
|
||||||
|
try page.setLineWidth(2);
|
||||||
|
try page.drawFilledRect(120, 230, 60, 60);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(100, 170, "Rotate + Scale");
|
||||||
|
|
||||||
|
// Example 2: Scale + Skew
|
||||||
|
try page.saveState();
|
||||||
|
try page.translate(300, 260);
|
||||||
|
try page.skew(20, 0);
|
||||||
|
try page.scaleFromOrigin(1.2, 0.8);
|
||||||
|
try page.translate(-300, -260);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(150, 255, 150));
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(0, 150, 0));
|
||||||
|
try page.drawFilledRect(270, 230, 60, 60);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(250, 170, "Scale + Skew");
|
||||||
|
|
||||||
|
// Example 3: Rotate + Skew + Scale
|
||||||
|
try page.saveState();
|
||||||
|
try page.rotate(-15, 450, 260);
|
||||||
|
try page.translate(450, 260);
|
||||||
|
try page.skew(10, 5);
|
||||||
|
try page.scaleFromOrigin(1.3, 1.1);
|
||||||
|
try page.translate(-450, -260);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(150, 150, 255));
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(0, 0, 200));
|
||||||
|
try page.drawFilledRect(420, 230, 60, 60);
|
||||||
|
|
||||||
|
try page.restoreState();
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(400, 170, "Rotate + Skew + Scale");
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.drawText(250, 50, "Page 2 of 2 - zpdf Transforms Demo");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Save
|
||||||
|
const filename = "transforms_demo.pdf";
|
||||||
|
try doc.save(filename);
|
||||||
|
|
||||||
|
std.debug.print("Created: {s} ({d} pages)\n", .{ filename, doc.pageCount() });
|
||||||
|
std.debug.print("Done!\n", .{});
|
||||||
|
}
|
||||||
209
examples/transparency_demo.zig
Normal file
209
examples/transparency_demo.zig
Normal file
|
|
@ -0,0 +1,209 @@
|
||||||
|
//! Transparency Demo - Alpha/Opacity Support
|
||||||
|
//!
|
||||||
|
//! Demonstrates the transparency capabilities of zpdf including:
|
||||||
|
//! - Fill opacity for shapes and text
|
||||||
|
//! - Stroke opacity for lines and outlines
|
||||||
|
//! - Layered transparent objects
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const pdf = @import("zpdf");
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
std.debug.print("zpdf - Transparency Demo\n", .{});
|
||||||
|
|
||||||
|
var doc = pdf.Pdf.init(allocator, .{});
|
||||||
|
defer doc.deinit();
|
||||||
|
|
||||||
|
doc.setTitle("Transparency Demo");
|
||||||
|
doc.setAuthor("zpdf");
|
||||||
|
|
||||||
|
const page = try doc.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 24);
|
||||||
|
page.setFillColor(pdf.Color.rgb(41, 98, 255));
|
||||||
|
try page.drawText(50, 780, "Transparency / Alpha");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 11);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 755, "Demonstrating fill and stroke opacity using ExtGState");
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Fill Opacity Examples
|
||||||
|
// =========================================================================
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 710, "Fill Opacity:");
|
||||||
|
|
||||||
|
// Draw overlapping squares with different opacities
|
||||||
|
const base_x: f32 = 80;
|
||||||
|
const base_y: f32 = 550;
|
||||||
|
const size: f32 = 100;
|
||||||
|
|
||||||
|
// First layer - red square (fully opaque)
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 0, 0));
|
||||||
|
try page.fillRect(base_x, base_y, size, size);
|
||||||
|
|
||||||
|
// Second layer - green square (75% opacity)
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 255, 0));
|
||||||
|
try page.setFillOpacity(0.75);
|
||||||
|
try page.fillRect(base_x + 40, base_y + 30, size, size);
|
||||||
|
|
||||||
|
// Third layer - blue square (50% opacity)
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 0, 255));
|
||||||
|
try page.setFillOpacity(0.5);
|
||||||
|
try page.fillRect(base_x + 80, base_y + 60, size, size);
|
||||||
|
|
||||||
|
// Labels
|
||||||
|
try page.setOpacity(1.0); // Reset to fully opaque
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
try page.drawText(base_x, base_y - 15, "Overlapping (100%, 75%, 50%)");
|
||||||
|
|
||||||
|
// Individual opacity examples
|
||||||
|
const opacities = [_]f32{ 1.0, 0.75, 0.5, 0.25, 0.1 };
|
||||||
|
var x: f32 = 280;
|
||||||
|
|
||||||
|
for (opacities) |opacity| {
|
||||||
|
try page.setFillOpacity(opacity);
|
||||||
|
page.setFillColor(pdf.Color.rgb(128, 0, 128)); // Purple
|
||||||
|
try page.fillRect(x, base_y + 30, 60, 60);
|
||||||
|
|
||||||
|
try page.setOpacity(1.0); // Reset for label
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
|
||||||
|
var buf: [32]u8 = undefined;
|
||||||
|
const label = std.fmt.bufPrint(&buf, "{d}%", .{@as(u32, @intFromFloat(opacity * 100))}) catch "??";
|
||||||
|
try page.drawText(x + 20, base_y + 10, label);
|
||||||
|
|
||||||
|
x += 70;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Stroke Opacity Examples
|
||||||
|
// =========================================================================
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 500, "Stroke Opacity:");
|
||||||
|
|
||||||
|
try page.setLineWidth(8);
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(220, 20, 60)); // Crimson
|
||||||
|
|
||||||
|
x = 80;
|
||||||
|
for (opacities) |opacity| {
|
||||||
|
try page.setStrokeOpacity(opacity);
|
||||||
|
try page.drawLine(x, 420, x + 80, 420);
|
||||||
|
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
|
||||||
|
var buf: [32]u8 = undefined;
|
||||||
|
const label = std.fmt.bufPrint(&buf, "{d}%", .{@as(u32, @intFromFloat(opacity * 100))}) catch "??";
|
||||||
|
try page.drawText(x + 20, 400, label);
|
||||||
|
|
||||||
|
x += 100;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Combined Fill and Stroke Opacity
|
||||||
|
// =========================================================================
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 370, "Combined Fill + Stroke Opacity:");
|
||||||
|
|
||||||
|
try page.setLineWidth(4);
|
||||||
|
|
||||||
|
x = 80;
|
||||||
|
const fill_opacities = [_]f32{ 1.0, 0.5, 0.25 };
|
||||||
|
const stroke_opacities = [_]f32{ 1.0, 0.5, 0.25 };
|
||||||
|
|
||||||
|
for (fill_opacities, stroke_opacities) |fill_op, stroke_op| {
|
||||||
|
page.setFillColor(pdf.Color.rgb(100, 149, 237)); // Cornflower blue
|
||||||
|
page.setStrokeColor(pdf.Color.rgb(0, 0, 139)); // Dark blue
|
||||||
|
|
||||||
|
try page.setFillOpacity(fill_op);
|
||||||
|
try page.setStrokeOpacity(stroke_op);
|
||||||
|
|
||||||
|
try page.drawFilledRect(x, 280, 80, 60);
|
||||||
|
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica, 8);
|
||||||
|
page.setFillColor(pdf.Color.dark_gray);
|
||||||
|
|
||||||
|
var buf: [32]u8 = undefined;
|
||||||
|
const label = std.fmt.bufPrint(&buf, "f:{d}% s:{d}%", .{
|
||||||
|
@as(u32, @intFromFloat(fill_op * 100)),
|
||||||
|
@as(u32, @intFromFloat(stroke_op * 100)),
|
||||||
|
}) catch "??";
|
||||||
|
try page.drawText(x, 265, label);
|
||||||
|
|
||||||
|
x += 120;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Transparent Text
|
||||||
|
// =========================================================================
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(50, 230, "Transparent Text:");
|
||||||
|
|
||||||
|
// Background rectangle
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 215, 0)); // Gold
|
||||||
|
try page.fillRect(80, 130, 450, 70);
|
||||||
|
|
||||||
|
// Overlapping text with different opacities
|
||||||
|
try page.setFont(.helvetica_bold, 48);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 0, 0));
|
||||||
|
try page.setFillOpacity(1.0);
|
||||||
|
try page.drawText(100, 150, "ZPDF");
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 128, 0));
|
||||||
|
try page.setFillOpacity(0.6);
|
||||||
|
try page.drawText(150, 160, "ZPDF");
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 0, 255));
|
||||||
|
try page.setFillOpacity(0.3);
|
||||||
|
try page.drawText(200, 170, "ZPDF");
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Transparent Circles (Venn diagram style)
|
||||||
|
// =========================================================================
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
page.setFillColor(pdf.Color.black);
|
||||||
|
try page.drawText(350, 230, "Overlapping Circles:");
|
||||||
|
|
||||||
|
try page.setFillOpacity(0.5);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(255, 0, 0));
|
||||||
|
try page.fillCircle(420, 170, 50);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 255, 0));
|
||||||
|
try page.fillCircle(460, 170, 50);
|
||||||
|
|
||||||
|
page.setFillColor(pdf.Color.rgb(0, 0, 255));
|
||||||
|
try page.fillCircle(440, 130, 50);
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try page.setOpacity(1.0);
|
||||||
|
try page.setFont(.helvetica, 9);
|
||||||
|
page.setFillColor(pdf.Color.medium_gray);
|
||||||
|
try page.drawText(250, 50, "zpdf Transparency Demo");
|
||||||
|
|
||||||
|
// Save
|
||||||
|
const filename = "transparency_demo.pdf";
|
||||||
|
try doc.save(filename);
|
||||||
|
|
||||||
|
std.debug.print("Created: {s} ({d} pages)\n", .{ filename, doc.pageCount() });
|
||||||
|
std.debug.print("Done!\n", .{});
|
||||||
|
}
|
||||||
194
examples/ttf_demo.zig
Normal file
194
examples/ttf_demo.zig
Normal file
|
|
@ -0,0 +1,194 @@
|
||||||
|
//! TrueType Font Demo
|
||||||
|
//!
|
||||||
|
//! Demonstrates loading and using TrueType fonts.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const zpdf = @import("zpdf");
|
||||||
|
const Pdf = zpdf.Pdf;
|
||||||
|
const Color = zpdf.Color;
|
||||||
|
const TrueTypeFont = zpdf.TrueTypeFont;
|
||||||
|
|
||||||
|
pub fn main() !void {
|
||||||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||||
|
defer _ = gpa.deinit();
|
||||||
|
const allocator = gpa.allocator();
|
||||||
|
|
||||||
|
var pdf = Pdf.init(allocator, .{});
|
||||||
|
defer pdf.deinit();
|
||||||
|
|
||||||
|
pdf.setTitle("TrueType Font Demo");
|
||||||
|
pdf.setAuthor("zpdf");
|
||||||
|
|
||||||
|
// Try to load a system TTF font
|
||||||
|
const font_paths = [_][]const u8{
|
||||||
|
"/usr/share/fonts/google-carlito-fonts/Carlito-Regular.ttf",
|
||||||
|
"/usr/share/fonts/adwaita-sans-fonts/AdwaitaSans-Regular.ttf",
|
||||||
|
"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",
|
||||||
|
"/usr/share/fonts/dejavu/DejaVuSans.ttf",
|
||||||
|
};
|
||||||
|
|
||||||
|
var ttf_font: ?TrueTypeFont = null;
|
||||||
|
var font_path: ?[]const u8 = null;
|
||||||
|
var font_data: ?[]u8 = null; // Keep font data alive
|
||||||
|
|
||||||
|
for (font_paths) |path| {
|
||||||
|
const file = std.fs.openFileAbsolute(path, .{}) catch continue;
|
||||||
|
defer file.close();
|
||||||
|
|
||||||
|
const data = file.readToEndAlloc(allocator, 10 * 1024 * 1024) catch continue;
|
||||||
|
// Don't defer free - font needs to keep data alive
|
||||||
|
|
||||||
|
ttf_font = TrueTypeFont.parse(allocator, data) catch {
|
||||||
|
allocator.free(data);
|
||||||
|
continue;
|
||||||
|
};
|
||||||
|
font_data = data;
|
||||||
|
font_path = path;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
defer if (font_data) |data| allocator.free(data);
|
||||||
|
|
||||||
|
var page = try pdf.addPage(.{});
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try page.setFont(.helvetica_bold, 28);
|
||||||
|
page.setFillColor(Color.hex(0x333333));
|
||||||
|
try page.drawText(50, 780, "TrueType Font Demo");
|
||||||
|
|
||||||
|
try page.setFont(.helvetica, 12);
|
||||||
|
page.setFillColor(Color.hex(0x666666));
|
||||||
|
try page.drawText(50, 760, "TrueType font parsing and information");
|
||||||
|
|
||||||
|
if (ttf_font) |*font| {
|
||||||
|
defer font.deinit();
|
||||||
|
|
||||||
|
// Font information section
|
||||||
|
try page.setFont(.helvetica_bold, 16);
|
||||||
|
page.setFillColor(Color.hex(0x333333));
|
||||||
|
try page.drawText(50, 720, "Loaded Font Information");
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
page.setFillColor(Color.black);
|
||||||
|
|
||||||
|
var y: f32 = 690;
|
||||||
|
|
||||||
|
try page.drawText(50, y, "File:");
|
||||||
|
try page.drawText(150, y, font_path.?);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
try page.drawText(50, y, "Family:");
|
||||||
|
if (font.family_name.len > 0) {
|
||||||
|
try page.drawText(150, y, font.family_name);
|
||||||
|
} else {
|
||||||
|
try page.drawText(150, y, "(not available)");
|
||||||
|
}
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
try page.drawText(50, y, "Subfamily:");
|
||||||
|
if (font.subfamily_name.len > 0) {
|
||||||
|
try page.drawText(150, y, font.subfamily_name);
|
||||||
|
} else {
|
||||||
|
try page.drawText(150, y, "(not available)");
|
||||||
|
}
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
try page.drawText(50, y, "PostScript:");
|
||||||
|
if (font.postscript_name.len > 0) {
|
||||||
|
try page.drawText(150, y, font.postscript_name);
|
||||||
|
} else {
|
||||||
|
try page.drawText(150, y, "(not available)");
|
||||||
|
}
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
// Font metrics
|
||||||
|
var buf: [128]u8 = undefined;
|
||||||
|
|
||||||
|
const units_str = std.fmt.bufPrint(&buf, "{d}", .{font.units_per_em}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "Units/EM:");
|
||||||
|
try page.drawText(150, y, units_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
const ascender_str = std.fmt.bufPrint(&buf, "{d}", .{font.ascender}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "Ascender:");
|
||||||
|
try page.drawText(150, y, ascender_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
const descender_str = std.fmt.bufPrint(&buf, "{d}", .{font.descender}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "Descender:");
|
||||||
|
try page.drawText(150, y, descender_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
const glyphs_str = std.fmt.bufPrint(&buf, "{d}", .{font.num_glyphs}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "Num Glyphs:");
|
||||||
|
try page.drawText(150, y, glyphs_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
// Bounding box
|
||||||
|
const bbox_str = std.fmt.bufPrint(&buf, "[{d}, {d}, {d}, {d}]", .{
|
||||||
|
font.bbox[0],
|
||||||
|
font.bbox[1],
|
||||||
|
font.bbox[2],
|
||||||
|
font.bbox[3],
|
||||||
|
}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "BBox:");
|
||||||
|
try page.drawText(150, y, bbox_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
const angle_str = std.fmt.bufPrint(&buf, "{d:.2}", .{font.italic_angle}) catch "(error)";
|
||||||
|
try page.drawText(50, y, "Italic Angle:");
|
||||||
|
try page.drawText(150, y, angle_str);
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
// Character width test
|
||||||
|
y -= 20;
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
try page.drawText(50, y, "Character Widths (in font units):");
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
|
||||||
|
const test_chars = "AaBbCcDdEeFf0123456789";
|
||||||
|
for (test_chars) |c| {
|
||||||
|
const glyph_id = font.getGlyphIndex(c);
|
||||||
|
const width = font.getGlyphWidth(glyph_id);
|
||||||
|
const char_str = std.fmt.bufPrint(&buf, "'{c}' -> glyph {d}, width {d}", .{ c, glyph_id, width }) catch "(error)";
|
||||||
|
try page.drawText(50, y, char_str);
|
||||||
|
y -= 15;
|
||||||
|
|
||||||
|
if (y < 100) break;
|
||||||
|
}
|
||||||
|
|
||||||
|
// String width calculation
|
||||||
|
y -= 20;
|
||||||
|
try page.setFont(.helvetica_bold, 14);
|
||||||
|
try page.drawText(50, y, "String Width Calculation:");
|
||||||
|
y -= 20;
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
const test_string = "Hello, World!";
|
||||||
|
const width_12pt = font.stringWidth(test_string, 12.0);
|
||||||
|
const width_str = std.fmt.bufPrint(&buf, "\"{s}\" at 12pt = {d:.2} points", .{ test_string, width_12pt }) catch "(error)";
|
||||||
|
try page.drawText(50, y, width_str);
|
||||||
|
} else {
|
||||||
|
try page.setFont(.helvetica, 14);
|
||||||
|
page.setFillColor(Color.red);
|
||||||
|
try page.drawText(50, 700, "No TrueType font found on this system.");
|
||||||
|
try page.drawText(50, 680, "Tried the following paths:");
|
||||||
|
|
||||||
|
try page.setFont(.courier, 10);
|
||||||
|
var y: f32 = 650;
|
||||||
|
for (font_paths) |path| {
|
||||||
|
try page.drawText(70, y, path);
|
||||||
|
y -= 15;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Note about TTF embedding
|
||||||
|
try page.setFont(.helvetica_oblique, 10);
|
||||||
|
page.setFillColor(Color.hex(0x999999));
|
||||||
|
try page.drawText(50, 50, "Note: Full TTF embedding in PDF requires additional implementation for CIDFont Type 2 output.");
|
||||||
|
|
||||||
|
try pdf.save("ttf_demo.pdf");
|
||||||
|
|
||||||
|
std.debug.print("Generated ttf_demo.pdf\n", .{});
|
||||||
|
}
|
||||||
347
src/barcodes/code128.zig
Normal file
347
src/barcodes/code128.zig
Normal file
|
|
@ -0,0 +1,347 @@
|
||||||
|
//! Code128 - Barcode Generation
|
||||||
|
//!
|
||||||
|
//! Generates Code128 barcodes (1D) with automatic code set selection.
|
||||||
|
//! Supports ASCII characters 0-127 (Code128 B) and numeric pairs (Code128 C).
|
||||||
|
//!
|
||||||
|
//! Reference: https://en.wikipedia.org/wiki/Code_128
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// Code128 barcode generator
|
||||||
|
pub const Code128 = struct {
|
||||||
|
/// Code sets
|
||||||
|
pub const CodeSet = enum {
|
||||||
|
a, // ASCII 0-31, 32-95
|
||||||
|
b, // ASCII 32-127
|
||||||
|
c, // Numeric pairs 00-99
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Special characters
|
||||||
|
pub const Special = struct {
|
||||||
|
pub const start_a: u8 = 103;
|
||||||
|
pub const start_b: u8 = 104;
|
||||||
|
pub const start_c: u8 = 105;
|
||||||
|
pub const code_a: u8 = 101; // Switch to Code A
|
||||||
|
pub const code_b: u8 = 100; // Switch to Code B
|
||||||
|
pub const code_c: u8 = 99; // Switch to Code C
|
||||||
|
pub const stop: u8 = 106;
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Pattern data for each character (11 bars/spaces, encoded as bits)
|
||||||
|
/// Each value represents 6 alternating bar/space widths
|
||||||
|
/// Values are 11-bit patterns
|
||||||
|
const patterns: [107]u16 = .{
|
||||||
|
// Values 0-99 (used differently by each code set)
|
||||||
|
0b11011001100, // 0
|
||||||
|
0b11001101100, // 1
|
||||||
|
0b11001100110, // 2
|
||||||
|
0b10010011000, // 3
|
||||||
|
0b10010001100, // 4
|
||||||
|
0b10001001100, // 5
|
||||||
|
0b10011001000, // 6
|
||||||
|
0b10011000100, // 7
|
||||||
|
0b10001100100, // 8
|
||||||
|
0b11001001000, // 9
|
||||||
|
0b11001000100, // 10
|
||||||
|
0b11000100100, // 11
|
||||||
|
0b10110011100, // 12
|
||||||
|
0b10011011100, // 13
|
||||||
|
0b10011001110, // 14
|
||||||
|
0b10111001100, // 15
|
||||||
|
0b10011101100, // 16
|
||||||
|
0b10011100110, // 17
|
||||||
|
0b11001110010, // 18
|
||||||
|
0b11001011100, // 19
|
||||||
|
0b11001001110, // 20
|
||||||
|
0b11011100100, // 21
|
||||||
|
0b11001110100, // 22
|
||||||
|
0b11101101110, // 23
|
||||||
|
0b11101001100, // 24
|
||||||
|
0b11100101100, // 25
|
||||||
|
0b11100100110, // 26
|
||||||
|
0b11101100100, // 27
|
||||||
|
0b11100110100, // 28
|
||||||
|
0b11100110010, // 29
|
||||||
|
0b11011011000, // 30
|
||||||
|
0b11011000110, // 31
|
||||||
|
0b11000110110, // 32
|
||||||
|
0b10100011000, // 33
|
||||||
|
0b10001011000, // 34
|
||||||
|
0b10001000110, // 35
|
||||||
|
0b10110001000, // 36
|
||||||
|
0b10001101000, // 37
|
||||||
|
0b10001100010, // 38
|
||||||
|
0b11010001000, // 39
|
||||||
|
0b11000101000, // 40
|
||||||
|
0b11000100010, // 41
|
||||||
|
0b10110111000, // 42
|
||||||
|
0b10110001110, // 43
|
||||||
|
0b10001101110, // 44
|
||||||
|
0b10111011000, // 45
|
||||||
|
0b10111000110, // 46
|
||||||
|
0b10001110110, // 47
|
||||||
|
0b11101110110, // 48
|
||||||
|
0b11010001110, // 49
|
||||||
|
0b11000101110, // 50
|
||||||
|
0b11011101000, // 51
|
||||||
|
0b11011100010, // 52
|
||||||
|
0b11011101110, // 53
|
||||||
|
0b11101011000, // 54
|
||||||
|
0b11101000110, // 55
|
||||||
|
0b11100010110, // 56
|
||||||
|
0b11101101000, // 57
|
||||||
|
0b11101100010, // 58
|
||||||
|
0b11100011010, // 59
|
||||||
|
0b11101111010, // 60
|
||||||
|
0b11001000010, // 61
|
||||||
|
0b11110001010, // 62
|
||||||
|
0b10100110000, // 63
|
||||||
|
0b10100001100, // 64
|
||||||
|
0b10010110000, // 65
|
||||||
|
0b10010000110, // 66
|
||||||
|
0b10000101100, // 67
|
||||||
|
0b10000100110, // 68
|
||||||
|
0b10110010000, // 69
|
||||||
|
0b10110000100, // 70
|
||||||
|
0b10011010000, // 71
|
||||||
|
0b10011000010, // 72
|
||||||
|
0b10000110100, // 73
|
||||||
|
0b10000110010, // 74
|
||||||
|
0b11000010010, // 75
|
||||||
|
0b11001010000, // 76
|
||||||
|
0b11110111010, // 77
|
||||||
|
0b11000010100, // 78
|
||||||
|
0b10001111010, // 79
|
||||||
|
0b10100111100, // 80
|
||||||
|
0b10010111100, // 81
|
||||||
|
0b10010011110, // 82
|
||||||
|
0b10111100100, // 83
|
||||||
|
0b10011110100, // 84
|
||||||
|
0b10011110010, // 85
|
||||||
|
0b11110100100, // 86
|
||||||
|
0b11110010100, // 87
|
||||||
|
0b11110010010, // 88
|
||||||
|
0b11011011110, // 89
|
||||||
|
0b11011110110, // 90
|
||||||
|
0b11110110110, // 91
|
||||||
|
0b10101111000, // 92
|
||||||
|
0b10100011110, // 93
|
||||||
|
0b10001011110, // 94
|
||||||
|
0b10111101000, // 95
|
||||||
|
0b10111100010, // 96
|
||||||
|
0b11110101000, // 97
|
||||||
|
0b11110100010, // 98
|
||||||
|
0b10111011110, // 99 (Code C)
|
||||||
|
0b10111101110, // 100 (Code B)
|
||||||
|
0b11101011110, // 101 (Code A)
|
||||||
|
0b11110101110, // 102 (FNC1)
|
||||||
|
0b11010000100, // 103 (Start A)
|
||||||
|
0b11010010000, // 104 (Start B)
|
||||||
|
0b11010011100, // 105 (Start C)
|
||||||
|
0b1100011101011, // 106 (Stop - 13 bits)
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Encodes a string into Code128 pattern.
|
||||||
|
/// Returns bar widths as an array of module counts.
|
||||||
|
/// Caller owns returned memory.
|
||||||
|
pub fn encode(allocator: std.mem.Allocator, text: []const u8) ![]u8 {
|
||||||
|
if (text.len == 0) return error.EmptyInput;
|
||||||
|
|
||||||
|
// Calculate capacity: start(11) + chars*11 + checksum(11) + stop(13) + quiet zones
|
||||||
|
const max_patterns = 2 + text.len + 1 + 1;
|
||||||
|
var codes: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
defer codes.deinit(allocator);
|
||||||
|
try codes.ensureTotalCapacity(allocator, max_patterns);
|
||||||
|
|
||||||
|
// Determine starting code set
|
||||||
|
const start_set = determineStartSet(text);
|
||||||
|
const start_code: u8 = switch (start_set) {
|
||||||
|
.a => Special.start_a,
|
||||||
|
.b => Special.start_b,
|
||||||
|
.c => Special.start_c,
|
||||||
|
};
|
||||||
|
try codes.append(allocator, start_code);
|
||||||
|
|
||||||
|
var checksum: u32 = start_code;
|
||||||
|
var weight: u32 = 1;
|
||||||
|
var current_set = start_set;
|
||||||
|
|
||||||
|
var i: usize = 0;
|
||||||
|
while (i < text.len) {
|
||||||
|
const c = text[i];
|
||||||
|
|
||||||
|
// Check if we should switch to Code C (all digits remaining)
|
||||||
|
if (current_set != .c and canSwitchToC(text[i..])) {
|
||||||
|
const code_c = Special.code_c;
|
||||||
|
try codes.append(allocator, code_c);
|
||||||
|
checksum += weight * code_c;
|
||||||
|
weight += 1;
|
||||||
|
current_set = .c;
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (current_set) {
|
||||||
|
.c => {
|
||||||
|
// Encode digit pairs
|
||||||
|
if (i + 1 < text.len and std.ascii.isDigit(c) and std.ascii.isDigit(text[i + 1])) {
|
||||||
|
const val: u8 = (c - '0') * 10 + (text[i + 1] - '0');
|
||||||
|
try codes.append(allocator, val);
|
||||||
|
checksum += weight * val;
|
||||||
|
weight += 1;
|
||||||
|
i += 2;
|
||||||
|
} else {
|
||||||
|
// Switch to Code B
|
||||||
|
const code_b = Special.code_b;
|
||||||
|
try codes.append(allocator, code_b);
|
||||||
|
checksum += weight * code_b;
|
||||||
|
weight += 1;
|
||||||
|
current_set = .b;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.b => {
|
||||||
|
// Code B: ASCII 32-127
|
||||||
|
if (c >= 32 and c <= 127) {
|
||||||
|
const val = c - 32;
|
||||||
|
try codes.append(allocator, val);
|
||||||
|
checksum += weight * val;
|
||||||
|
weight += 1;
|
||||||
|
i += 1;
|
||||||
|
} else {
|
||||||
|
return error.InvalidCharacter;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.a => {
|
||||||
|
// Code A: ASCII 0-95
|
||||||
|
if (c < 32) {
|
||||||
|
const val = c + 64;
|
||||||
|
try codes.append(allocator, val);
|
||||||
|
checksum += weight * val;
|
||||||
|
weight += 1;
|
||||||
|
} else if (c >= 32 and c <= 95) {
|
||||||
|
const val = c - 32;
|
||||||
|
try codes.append(allocator, val);
|
||||||
|
checksum += weight * val;
|
||||||
|
weight += 1;
|
||||||
|
} else {
|
||||||
|
return error.InvalidCharacter;
|
||||||
|
}
|
||||||
|
i += 1;
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add checksum
|
||||||
|
const checksum_val: u8 = @intCast(checksum % 103);
|
||||||
|
try codes.append(allocator, checksum_val);
|
||||||
|
|
||||||
|
// Add stop
|
||||||
|
try codes.append(allocator, Special.stop);
|
||||||
|
|
||||||
|
// Convert codes to bar patterns (module widths)
|
||||||
|
// Each pattern is 11 modules (except stop which is 13)
|
||||||
|
// Plus 10 module quiet zone on each side
|
||||||
|
const total_modules = 10 + (codes.items.len - 1) * 11 + 13 + 10;
|
||||||
|
var bars = try allocator.alloc(u8, total_modules);
|
||||||
|
@memset(bars, 0);
|
||||||
|
|
||||||
|
var pos: usize = 10; // Start after quiet zone
|
||||||
|
|
||||||
|
for (codes.items) |code| {
|
||||||
|
const pattern = patterns[code];
|
||||||
|
const bits: u5 = if (code == Special.stop) 13 else 11;
|
||||||
|
|
||||||
|
var bit: u5 = bits;
|
||||||
|
while (bit > 0) : (bit -= 1) {
|
||||||
|
const shift: u4 = @intCast(bit - 1);
|
||||||
|
const is_bar = (pattern >> shift) & 1 == 1;
|
||||||
|
bars[pos] = if (is_bar) 1 else 0;
|
||||||
|
pos += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return bars;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Determines best starting code set for the data
|
||||||
|
fn determineStartSet(text: []const u8) CodeSet {
|
||||||
|
// If starts with 4+ digits, use Code C
|
||||||
|
var digit_count: usize = 0;
|
||||||
|
for (text) |c| {
|
||||||
|
if (std.ascii.isDigit(c)) {
|
||||||
|
digit_count += 1;
|
||||||
|
} else {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (digit_count >= 4) {
|
||||||
|
return .c;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for control characters (need Code A)
|
||||||
|
for (text) |c| {
|
||||||
|
if (c < 32) return .a;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Default to Code B
|
||||||
|
return .b;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Checks if remaining text is all digit pairs (for switching to Code C)
|
||||||
|
fn canSwitchToC(text: []const u8) bool {
|
||||||
|
if (text.len < 4) return false;
|
||||||
|
|
||||||
|
// Count leading digits
|
||||||
|
var count: usize = 0;
|
||||||
|
for (text) |c| {
|
||||||
|
if (std.ascii.isDigit(c)) {
|
||||||
|
count += 1;
|
||||||
|
} else {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return count >= 4 and count % 2 == 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the width of the barcode in modules for given text
|
||||||
|
pub fn getWidth(text: []const u8) usize {
|
||||||
|
// Quiet zone (10) + start (11) + data + checksum (11) + stop (13) + quiet zone (10)
|
||||||
|
// In Code B, each character is 11 modules
|
||||||
|
// In Code C, each pair is 11 modules
|
||||||
|
// Simplified: assume all Code B
|
||||||
|
return 10 + 11 + text.len * 11 + 11 + 13 + 10;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "Code128 encode simple text" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
const bars = try Code128.encode(allocator, "ABC");
|
||||||
|
defer allocator.free(bars);
|
||||||
|
|
||||||
|
// Should have quiet zones and patterns
|
||||||
|
try std.testing.expect(bars.len > 0);
|
||||||
|
// First 10 should be quiet zone (0s)
|
||||||
|
for (bars[0..10]) |b| {
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), b);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Code128 encode digits" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
const bars = try Code128.encode(allocator, "123456");
|
||||||
|
defer allocator.free(bars);
|
||||||
|
|
||||||
|
try std.testing.expect(bars.len > 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Code128 empty input" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
const result = Code128.encode(allocator, "");
|
||||||
|
try std.testing.expectError(error.EmptyInput, result);
|
||||||
|
}
|
||||||
11
src/barcodes/mod.zig
Normal file
11
src/barcodes/mod.zig
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
//! Barcodes module - 1D and 2D barcode generation
|
||||||
|
//!
|
||||||
|
//! Supports:
|
||||||
|
//! - Code128 (1D) - ASCII 0-127
|
||||||
|
//! - QR Code (2D) - ISO/IEC 18004
|
||||||
|
|
||||||
|
pub const code128 = @import("code128.zig");
|
||||||
|
pub const Code128 = code128.Code128;
|
||||||
|
|
||||||
|
pub const qr = @import("qr.zig");
|
||||||
|
pub const QRCode = qr.QRCode;
|
||||||
474
src/barcodes/qr.zig
Normal file
474
src/barcodes/qr.zig
Normal file
|
|
@ -0,0 +1,474 @@
|
||||||
|
//! QR Code - 2D Barcode Generation
|
||||||
|
//!
|
||||||
|
//! Generates QR Code (Model 2) barcodes with error correction.
|
||||||
|
//! Supports numeric, alphanumeric, and byte modes.
|
||||||
|
//!
|
||||||
|
//! Reference: ISO/IEC 18004:2015
|
||||||
|
//! Simplified implementation for versions 1-10 (21x21 to 57x57 modules)
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// QR Code generator
|
||||||
|
pub const QRCode = struct {
|
||||||
|
/// Error correction levels
|
||||||
|
pub const ErrorCorrection = enum {
|
||||||
|
/// Low - ~7% recovery
|
||||||
|
L,
|
||||||
|
/// Medium - ~15% recovery
|
||||||
|
M,
|
||||||
|
/// Quartile - ~25% recovery
|
||||||
|
Q,
|
||||||
|
/// High - ~30% recovery
|
||||||
|
H,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Data encoding modes
|
||||||
|
pub const Mode = enum(u4) {
|
||||||
|
numeric = 0b0001,
|
||||||
|
alphanumeric = 0b0010,
|
||||||
|
byte = 0b0100,
|
||||||
|
// kanji = 0b1000, // Not implemented
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Alphanumeric character set
|
||||||
|
const alphanumeric_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
|
||||||
|
|
||||||
|
/// QR Code matrix
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
size: usize,
|
||||||
|
modules: [][]bool,
|
||||||
|
version: u8,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
/// Generates a QR Code for the given text.
|
||||||
|
/// Returns a QRCode struct with the module matrix.
|
||||||
|
/// Caller must call deinit() when done.
|
||||||
|
pub fn encode(allocator: std.mem.Allocator, text: []const u8, ec: ErrorCorrection) !Self {
|
||||||
|
if (text.len == 0) return error.EmptyInput;
|
||||||
|
|
||||||
|
// Determine best mode and version
|
||||||
|
const mode = determineMode(text);
|
||||||
|
const version = try selectVersion(text.len, mode, ec);
|
||||||
|
const size = 17 + version * 4;
|
||||||
|
|
||||||
|
// Allocate module matrix
|
||||||
|
const modules = try allocator.alloc([]bool, size);
|
||||||
|
for (modules) |*row| {
|
||||||
|
row.* = try allocator.alloc(bool, size);
|
||||||
|
@memset(row.*, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
var qr = Self{
|
||||||
|
.allocator = allocator,
|
||||||
|
.size = size,
|
||||||
|
.modules = modules,
|
||||||
|
.version = version,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Build QR Code
|
||||||
|
qr.addFinderPatterns();
|
||||||
|
qr.addTimingPatterns();
|
||||||
|
qr.addAlignmentPatterns();
|
||||||
|
|
||||||
|
// Encode data
|
||||||
|
const data_bits = try qr.encodeData(text, mode, ec);
|
||||||
|
defer allocator.free(data_bits);
|
||||||
|
|
||||||
|
// Place data with mask
|
||||||
|
qr.placeData(data_bits);
|
||||||
|
|
||||||
|
// Add format info
|
||||||
|
qr.addFormatInfo(ec, 0); // mask pattern 0
|
||||||
|
|
||||||
|
return qr;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Frees the QR Code resources.
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
for (self.modules) |row| {
|
||||||
|
self.allocator.free(row);
|
||||||
|
}
|
||||||
|
self.allocator.free(self.modules);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns module at (x, y). True = dark, False = light.
|
||||||
|
pub fn get(self: *const Self, x: usize, y: usize) bool {
|
||||||
|
if (x >= self.size or y >= self.size) return false;
|
||||||
|
return self.modules[y][x];
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Sets module at (x, y).
|
||||||
|
fn set(self: *Self, x: usize, y: usize, dark: bool) void {
|
||||||
|
if (x >= self.size or y >= self.size) return;
|
||||||
|
self.modules[y][x] = dark;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Determines the best encoding mode for the text.
|
||||||
|
fn determineMode(text: []const u8) Mode {
|
||||||
|
var all_numeric = true;
|
||||||
|
var all_alphanumeric = true;
|
||||||
|
|
||||||
|
for (text) |c| {
|
||||||
|
if (!std.ascii.isDigit(c)) {
|
||||||
|
all_numeric = false;
|
||||||
|
}
|
||||||
|
if (std.mem.indexOfScalar(u8, alphanumeric_chars, c) == null) {
|
||||||
|
all_alphanumeric = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (all_numeric) return .numeric;
|
||||||
|
if (all_alphanumeric) return .alphanumeric;
|
||||||
|
return .byte;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Selects the minimum version that can hold the data.
|
||||||
|
fn selectVersion(data_len: usize, mode: Mode, ec: ErrorCorrection) !u8 {
|
||||||
|
// Simplified capacity table (chars per version for EC level M)
|
||||||
|
// Version 1-10 only
|
||||||
|
const capacities_numeric = [_]usize{ 34, 63, 101, 149, 202, 255, 293, 365, 432, 513 };
|
||||||
|
const capacities_alphanum = [_]usize{ 20, 38, 61, 90, 122, 154, 178, 221, 262, 311 };
|
||||||
|
const capacities_byte = [_]usize{ 14, 26, 42, 62, 84, 106, 122, 152, 180, 213 };
|
||||||
|
|
||||||
|
const caps = switch (mode) {
|
||||||
|
.numeric => &capacities_numeric,
|
||||||
|
.alphanumeric => &capacities_alphanum,
|
||||||
|
.byte => &capacities_byte,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Adjust for EC level (simplified)
|
||||||
|
const ec_factor: f32 = switch (ec) {
|
||||||
|
.L => 1.0,
|
||||||
|
.M => 0.8,
|
||||||
|
.Q => 0.6,
|
||||||
|
.H => 0.45,
|
||||||
|
};
|
||||||
|
|
||||||
|
for (caps, 1..) |cap, v| {
|
||||||
|
const adjusted_cap: usize = @intFromFloat(@as(f32, @floatFromInt(cap)) * ec_factor);
|
||||||
|
if (data_len <= adjusted_cap) {
|
||||||
|
return @intCast(v);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return error.DataTooLong;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds the 7x7 finder patterns in corners.
|
||||||
|
fn addFinderPatterns(self: *Self) void {
|
||||||
|
// Top-left
|
||||||
|
self.addFinderPattern(0, 0);
|
||||||
|
// Top-right
|
||||||
|
self.addFinderPattern(self.size - 7, 0);
|
||||||
|
// Bottom-left
|
||||||
|
self.addFinderPattern(0, self.size - 7);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn addFinderPattern(self: *Self, start_x: usize, start_y: usize) void {
|
||||||
|
// 7x7 pattern with separator
|
||||||
|
for (0..7) |dy| {
|
||||||
|
for (0..7) |dx| {
|
||||||
|
const x = start_x + dx;
|
||||||
|
const y = start_y + dy;
|
||||||
|
// Outer dark border + inner light + center dark
|
||||||
|
const is_border = dx == 0 or dx == 6 or dy == 0 or dy == 6;
|
||||||
|
const is_inner_light = dx == 1 or dx == 5 or dy == 1 or dy == 5;
|
||||||
|
const is_center = dx >= 2 and dx <= 4 and dy >= 2 and dy <= 4;
|
||||||
|
self.set(x, y, is_border or (!is_inner_light and is_center));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add separator (white border)
|
||||||
|
// Right of top-left finder
|
||||||
|
if (start_x == 0 and start_y == 0) {
|
||||||
|
for (0..8) |i| {
|
||||||
|
self.set(7, i, false);
|
||||||
|
self.set(i, 7, false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// Left of top-right finder
|
||||||
|
if (start_x == self.size - 7 and start_y == 0) {
|
||||||
|
for (0..8) |i| {
|
||||||
|
self.set(self.size - 8, i, false);
|
||||||
|
self.set(self.size - 8 + i, 7, false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// Right of bottom-left finder
|
||||||
|
if (start_x == 0 and start_y == self.size - 7) {
|
||||||
|
for (0..8) |i| {
|
||||||
|
self.set(7, self.size - 8 + i, false);
|
||||||
|
self.set(i, self.size - 8, false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds timing patterns.
|
||||||
|
fn addTimingPatterns(self: *Self) void {
|
||||||
|
// Horizontal timing pattern (row 6)
|
||||||
|
for (8..self.size - 8) |x| {
|
||||||
|
self.set(x, 6, x % 2 == 0);
|
||||||
|
}
|
||||||
|
// Vertical timing pattern (column 6)
|
||||||
|
for (8..self.size - 8) |y| {
|
||||||
|
self.set(6, y, y % 2 == 0);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds alignment patterns (for version >= 2).
|
||||||
|
fn addAlignmentPatterns(self: *Self) void {
|
||||||
|
if (self.version < 2) return;
|
||||||
|
|
||||||
|
// Simplified: add one alignment pattern at specific position
|
||||||
|
// Full implementation would have multiple patterns
|
||||||
|
const pos = switch (self.version) {
|
||||||
|
2 => 18,
|
||||||
|
3 => 22,
|
||||||
|
4 => 26,
|
||||||
|
5 => 30,
|
||||||
|
6 => 34,
|
||||||
|
else => self.size - 7,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Don't overlap with finder patterns
|
||||||
|
if (pos > 8 and pos < self.size - 8) {
|
||||||
|
self.addAlignmentPattern(pos, pos);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn addAlignmentPattern(self: *Self, cx: usize, cy: usize) void {
|
||||||
|
// 5x5 alignment pattern
|
||||||
|
for (0..5) |dy| {
|
||||||
|
for (0..5) |dx| {
|
||||||
|
const x = cx - 2 + dx;
|
||||||
|
const y = cy - 2 + dy;
|
||||||
|
const is_border = dx == 0 or dx == 4 or dy == 0 or dy == 4;
|
||||||
|
const is_center = dx == 2 and dy == 2;
|
||||||
|
self.set(x, y, is_border or is_center);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Encodes data into bit stream.
|
||||||
|
fn encodeData(self: *Self, text: []const u8, mode: Mode, ec: ErrorCorrection) ![]u8 {
|
||||||
|
_ = ec;
|
||||||
|
var bits: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
defer bits.deinit(self.allocator);
|
||||||
|
|
||||||
|
// Mode indicator (4 bits)
|
||||||
|
try self.appendBits(&bits, @intFromEnum(mode), 4);
|
||||||
|
|
||||||
|
// Character count indicator
|
||||||
|
const count_bits: u8 = switch (mode) {
|
||||||
|
.numeric => if (self.version <= 9) 10 else 12,
|
||||||
|
.alphanumeric => if (self.version <= 9) 9 else 11,
|
||||||
|
.byte => if (self.version <= 9) 8 else 16,
|
||||||
|
};
|
||||||
|
try self.appendBits(&bits, @intCast(text.len), count_bits);
|
||||||
|
|
||||||
|
// Encode data
|
||||||
|
switch (mode) {
|
||||||
|
.numeric => try self.encodeNumeric(&bits, text),
|
||||||
|
.alphanumeric => try self.encodeAlphanumeric(&bits, text),
|
||||||
|
.byte => try self.encodeByte(&bits, text),
|
||||||
|
}
|
||||||
|
|
||||||
|
// Terminator (0000)
|
||||||
|
try self.appendBits(&bits, 0, 4);
|
||||||
|
|
||||||
|
// Pad to byte boundary
|
||||||
|
while (bits.items.len % 8 != 0) {
|
||||||
|
try bits.append(self.allocator, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return try bits.toOwnedSlice(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn appendBits(self: *Self, bits: *std.ArrayListUnmanaged(u8), value: u32, count: u8) !void {
|
||||||
|
var i: u8 = count;
|
||||||
|
while (i > 0) : (i -= 1) {
|
||||||
|
const shift: u5 = @intCast(i - 1);
|
||||||
|
const bit: u8 = @intCast((value >> shift) & 1);
|
||||||
|
try bits.append(self.allocator, bit);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn encodeNumeric(self: *Self, bits: *std.ArrayListUnmanaged(u8), text: []const u8) !void {
|
||||||
|
var i: usize = 0;
|
||||||
|
while (i < text.len) {
|
||||||
|
if (i + 2 < text.len) {
|
||||||
|
// 3 digits -> 10 bits
|
||||||
|
const val = (text[i] - '0') * 100 + (text[i + 1] - '0') * 10 + (text[i + 2] - '0');
|
||||||
|
try self.appendBits(bits, val, 10);
|
||||||
|
i += 3;
|
||||||
|
} else if (i + 1 < text.len) {
|
||||||
|
// 2 digits -> 7 bits
|
||||||
|
const val = (text[i] - '0') * 10 + (text[i + 1] - '0');
|
||||||
|
try self.appendBits(bits, val, 7);
|
||||||
|
i += 2;
|
||||||
|
} else {
|
||||||
|
// 1 digit -> 4 bits
|
||||||
|
try self.appendBits(bits, text[i] - '0', 4);
|
||||||
|
i += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn encodeAlphanumeric(self: *Self, bits: *std.ArrayListUnmanaged(u8), text: []const u8) !void {
|
||||||
|
var i: usize = 0;
|
||||||
|
while (i < text.len) {
|
||||||
|
if (i + 1 < text.len) {
|
||||||
|
// 2 chars -> 11 bits
|
||||||
|
const v1 = getAlphanumericValue(text[i]);
|
||||||
|
const v2 = getAlphanumericValue(text[i + 1]);
|
||||||
|
const val = v1 * 45 + v2;
|
||||||
|
try self.appendBits(bits, val, 11);
|
||||||
|
i += 2;
|
||||||
|
} else {
|
||||||
|
// 1 char -> 6 bits
|
||||||
|
try self.appendBits(bits, getAlphanumericValue(text[i]), 6);
|
||||||
|
i += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn encodeByte(self: *Self, bits: *std.ArrayListUnmanaged(u8), text: []const u8) !void {
|
||||||
|
for (text) |c| {
|
||||||
|
try self.appendBits(bits, c, 8);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn getAlphanumericValue(c: u8) u32 {
|
||||||
|
if (std.mem.indexOfScalar(u8, alphanumeric_chars, c)) |idx| {
|
||||||
|
return @intCast(idx);
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Places data bits in the matrix.
|
||||||
|
fn placeData(self: *Self, data_bits: []const u8) void {
|
||||||
|
var bit_idx: usize = 0;
|
||||||
|
var x: usize = self.size - 1;
|
||||||
|
var upward = true;
|
||||||
|
|
||||||
|
while (x > 0 and bit_idx < data_bits.len) {
|
||||||
|
// Skip timing pattern column
|
||||||
|
if (x == 6) x -= 1;
|
||||||
|
|
||||||
|
const x1 = x;
|
||||||
|
const x2 = if (x > 0) x - 1 else 0;
|
||||||
|
|
||||||
|
if (upward) {
|
||||||
|
var y: usize = self.size - 1;
|
||||||
|
while (y < self.size and bit_idx < data_bits.len) : (y -%= 1) {
|
||||||
|
if (!self.isReserved(x1, y) and bit_idx < data_bits.len) {
|
||||||
|
self.set(x1, y, data_bits[bit_idx] == 1);
|
||||||
|
bit_idx += 1;
|
||||||
|
}
|
||||||
|
if (!self.isReserved(x2, y) and bit_idx < data_bits.len) {
|
||||||
|
self.set(x2, y, data_bits[bit_idx] == 1);
|
||||||
|
bit_idx += 1;
|
||||||
|
}
|
||||||
|
if (y == 0) break;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
for (0..self.size) |y| {
|
||||||
|
if (!self.isReserved(x1, y) and bit_idx < data_bits.len) {
|
||||||
|
self.set(x1, y, data_bits[bit_idx] == 1);
|
||||||
|
bit_idx += 1;
|
||||||
|
}
|
||||||
|
if (!self.isReserved(x2, y) and bit_idx < data_bits.len) {
|
||||||
|
self.set(x2, y, data_bits[bit_idx] == 1);
|
||||||
|
bit_idx += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
upward = !upward;
|
||||||
|
if (x < 2) break;
|
||||||
|
x -= 2;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Checks if a module position is reserved (finder, timing, etc.).
|
||||||
|
fn isReserved(self: *Self, x: usize, y: usize) bool {
|
||||||
|
// Finder patterns + separators
|
||||||
|
if (x <= 8 and y <= 8) return true; // Top-left
|
||||||
|
if (x >= self.size - 8 and y <= 8) return true; // Top-right
|
||||||
|
if (x <= 8 and y >= self.size - 8) return true; // Bottom-left
|
||||||
|
|
||||||
|
// Timing patterns
|
||||||
|
if (x == 6 or y == 6) return true;
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds format information.
|
||||||
|
fn addFormatInfo(self: *Self, ec: ErrorCorrection, mask: u8) void {
|
||||||
|
_ = mask;
|
||||||
|
// Format info bits (simplified - just dark module)
|
||||||
|
const format: u16 = switch (ec) {
|
||||||
|
.L => 0b111011111000100,
|
||||||
|
.M => 0b101010000010010,
|
||||||
|
.Q => 0b011010101011111,
|
||||||
|
.H => 0b001011010001001,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Place around top-left finder
|
||||||
|
for (0..6) |i| {
|
||||||
|
const bit = (format >> @intCast(i)) & 1 == 1;
|
||||||
|
self.set(i, 8, bit);
|
||||||
|
}
|
||||||
|
// Skip timing pattern
|
||||||
|
self.set(7, 8, (format >> 6) & 1 == 1);
|
||||||
|
self.set(8, 8, (format >> 7) & 1 == 1);
|
||||||
|
self.set(8, 7, (format >> 8) & 1 == 1);
|
||||||
|
|
||||||
|
for (0..6) |i| {
|
||||||
|
const bit = (format >> @intCast(9 + i)) & 1 == 1;
|
||||||
|
self.set(8, 5 - i, bit);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Dark module
|
||||||
|
self.set(8, self.size - 8, true);
|
||||||
|
|
||||||
|
// Vertical format info (right of bottom-left finder)
|
||||||
|
for (0..7) |i| {
|
||||||
|
const bit = (format >> @intCast(i)) & 1 == 1;
|
||||||
|
self.set(8, self.size - 1 - i, bit);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Horizontal format info (below top-right finder)
|
||||||
|
for (0..8) |i| {
|
||||||
|
const bit = (format >> @intCast(7 + i)) & 1 == 1;
|
||||||
|
self.set(self.size - 8 + i, 8, bit);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "QRCode encode simple" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var qr = try QRCode.encode(allocator, "HELLO", .M);
|
||||||
|
defer qr.deinit();
|
||||||
|
|
||||||
|
// Check version 1 creates 21x21 matrix
|
||||||
|
try std.testing.expect(qr.size >= 21);
|
||||||
|
try std.testing.expect(qr.version >= 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "QRCode determine mode" {
|
||||||
|
try std.testing.expectEqual(QRCode.Mode.numeric, QRCode.determineMode("12345"));
|
||||||
|
try std.testing.expectEqual(QRCode.Mode.alphanumeric, QRCode.determineMode("HELLO123"));
|
||||||
|
try std.testing.expectEqual(QRCode.Mode.byte, QRCode.determineMode("hello world"));
|
||||||
|
}
|
||||||
|
|
||||||
|
test "QRCode empty input" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
const result = QRCode.encode(allocator, "", .M);
|
||||||
|
try std.testing.expectError(error.EmptyInput, result);
|
||||||
|
}
|
||||||
22
src/compression/mod.zig
Normal file
22
src/compression/mod.zig
Normal file
|
|
@ -0,0 +1,22 @@
|
||||||
|
//! Compression module for zpdf
|
||||||
|
//!
|
||||||
|
//! Provides zlib/deflate compression and decompression using libdeflate.
|
||||||
|
//! Used for PNG image processing and PDF stream compression.
|
||||||
|
|
||||||
|
pub const zlib = @import("zlib.zig");
|
||||||
|
|
||||||
|
// Zlib format (with header/footer)
|
||||||
|
pub const compress = zlib.compress;
|
||||||
|
pub const compressLevel = zlib.compressLevel;
|
||||||
|
pub const decompress = zlib.decompress;
|
||||||
|
|
||||||
|
// Raw deflate (no header/footer) - used for PDF FlateDecode
|
||||||
|
pub const compressDeflate = zlib.compressDeflate;
|
||||||
|
pub const compressDeflateLevel = zlib.compressDeflateLevel;
|
||||||
|
pub const decompressDeflate = zlib.decompressDeflate;
|
||||||
|
|
||||||
|
pub const ZlibError = zlib.ZlibError;
|
||||||
|
|
||||||
|
test {
|
||||||
|
_ = zlib;
|
||||||
|
}
|
||||||
322
src/compression/zlib.zig
Normal file
322
src/compression/zlib.zig
Normal file
|
|
@ -0,0 +1,322 @@
|
||||||
|
//! zlib compression utilities for zpdf
|
||||||
|
//!
|
||||||
|
//! Provides compression and decompression using libdeflate.
|
||||||
|
//! Used for PNG image processing and PDF stream compression.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const c = @cImport({
|
||||||
|
@cInclude("libdeflate.h");
|
||||||
|
});
|
||||||
|
|
||||||
|
/// Configuration for compression limits
|
||||||
|
pub const Config = struct {
|
||||||
|
/// Maximum decompression output size (default: 100MB)
|
||||||
|
/// This prevents decompression bombs
|
||||||
|
pub const max_decompression_size: usize = 100 * 1024 * 1024;
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const ZlibError = error{
|
||||||
|
DecompressionFailed,
|
||||||
|
CompressionFailed,
|
||||||
|
InvalidData,
|
||||||
|
OutOfMemory,
|
||||||
|
OutputBufferTooSmall,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Decompress zlib-compressed data (with zlib header/footer).
|
||||||
|
/// Returns owned slice that must be freed by caller.
|
||||||
|
pub fn decompress(allocator: std.mem.Allocator, compressed: []const u8) ![]u8 {
|
||||||
|
const decompressor = c.libdeflate_alloc_decompressor() orelse {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
defer c.libdeflate_free_decompressor(decompressor);
|
||||||
|
|
||||||
|
// Start with a reasonable initial size (4x compressed size)
|
||||||
|
var out_size: usize = compressed.len * 4;
|
||||||
|
if (out_size < 1024) out_size = 1024;
|
||||||
|
|
||||||
|
while (true) {
|
||||||
|
var output = allocator.alloc(u8, out_size) catch {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
|
||||||
|
var actual_size: usize = 0;
|
||||||
|
const result = c.libdeflate_zlib_decompress(
|
||||||
|
decompressor,
|
||||||
|
compressed.ptr,
|
||||||
|
compressed.len,
|
||||||
|
output.ptr,
|
||||||
|
output.len,
|
||||||
|
&actual_size,
|
||||||
|
);
|
||||||
|
|
||||||
|
switch (result) {
|
||||||
|
c.LIBDEFLATE_SUCCESS => {
|
||||||
|
// Shrink to actual size
|
||||||
|
if (actual_size < output.len) {
|
||||||
|
if (allocator.resize(output, actual_size)) {
|
||||||
|
return output[0..actual_size];
|
||||||
|
} else {
|
||||||
|
// resize failed, copy to new smaller buffer
|
||||||
|
const final = allocator.alloc(u8, actual_size) catch {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
@memcpy(final, output[0..actual_size]);
|
||||||
|
allocator.free(output);
|
||||||
|
return final;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return output;
|
||||||
|
},
|
||||||
|
c.LIBDEFLATE_BAD_DATA => {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.InvalidData;
|
||||||
|
},
|
||||||
|
c.LIBDEFLATE_INSUFFICIENT_SPACE => {
|
||||||
|
// Output buffer too small, try larger
|
||||||
|
allocator.free(output);
|
||||||
|
out_size *= 2;
|
||||||
|
if (out_size > Config.max_decompression_size) {
|
||||||
|
return ZlibError.OutputBufferTooSmall;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
else => {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.DecompressionFailed;
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compress data using zlib format (with zlib header/footer).
|
||||||
|
/// Returns owned slice that must be freed by caller.
|
||||||
|
pub fn compress(allocator: std.mem.Allocator, data: []const u8) ![]u8 {
|
||||||
|
return compressLevel(allocator, data, 6); // Default compression level
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compress data using zlib format with specified compression level (0-12).
|
||||||
|
/// Returns owned slice that must be freed by caller.
|
||||||
|
pub fn compressLevel(allocator: std.mem.Allocator, data: []const u8, level: i32) ![]u8 {
|
||||||
|
const compressor = c.libdeflate_alloc_compressor(level) orelse {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
defer c.libdeflate_free_compressor(compressor);
|
||||||
|
|
||||||
|
// Get worst-case output size
|
||||||
|
const max_size = c.libdeflate_zlib_compress_bound(compressor, data.len);
|
||||||
|
|
||||||
|
var output = allocator.alloc(u8, max_size) catch {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
|
||||||
|
const actual_size = c.libdeflate_zlib_compress(
|
||||||
|
compressor,
|
||||||
|
data.ptr,
|
||||||
|
data.len,
|
||||||
|
output.ptr,
|
||||||
|
output.len,
|
||||||
|
);
|
||||||
|
|
||||||
|
if (actual_size == 0) {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.CompressionFailed;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Shrink to actual size
|
||||||
|
if (actual_size < output.len) {
|
||||||
|
if (allocator.resize(output, actual_size)) {
|
||||||
|
return output[0..actual_size];
|
||||||
|
} else {
|
||||||
|
// resize failed, copy to new smaller buffer
|
||||||
|
const final = allocator.alloc(u8, actual_size) catch {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
@memcpy(final, output[0..actual_size]);
|
||||||
|
allocator.free(output);
|
||||||
|
return final;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return output;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Decompress raw deflate data (no header/footer).
|
||||||
|
/// Returns owned slice that must be freed by caller.
|
||||||
|
pub fn decompressDeflate(allocator: std.mem.Allocator, compressed: []const u8) ![]u8 {
|
||||||
|
const decompressor = c.libdeflate_alloc_decompressor() orelse {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
defer c.libdeflate_free_decompressor(decompressor);
|
||||||
|
|
||||||
|
var out_size: usize = compressed.len * 4;
|
||||||
|
if (out_size < 1024) out_size = 1024;
|
||||||
|
|
||||||
|
while (true) {
|
||||||
|
var output = allocator.alloc(u8, out_size) catch {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
|
||||||
|
var actual_size: usize = 0;
|
||||||
|
const result = c.libdeflate_deflate_decompress(
|
||||||
|
decompressor,
|
||||||
|
compressed.ptr,
|
||||||
|
compressed.len,
|
||||||
|
output.ptr,
|
||||||
|
output.len,
|
||||||
|
&actual_size,
|
||||||
|
);
|
||||||
|
|
||||||
|
switch (result) {
|
||||||
|
c.LIBDEFLATE_SUCCESS => {
|
||||||
|
if (actual_size < output.len) {
|
||||||
|
if (allocator.resize(output, actual_size)) {
|
||||||
|
return output[0..actual_size];
|
||||||
|
} else {
|
||||||
|
const final = allocator.alloc(u8, actual_size) catch {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
@memcpy(final, output[0..actual_size]);
|
||||||
|
allocator.free(output);
|
||||||
|
return final;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return output;
|
||||||
|
},
|
||||||
|
c.LIBDEFLATE_BAD_DATA => {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.InvalidData;
|
||||||
|
},
|
||||||
|
c.LIBDEFLATE_INSUFFICIENT_SPACE => {
|
||||||
|
allocator.free(output);
|
||||||
|
out_size *= 2;
|
||||||
|
if (out_size > Config.max_decompression_size) {
|
||||||
|
return ZlibError.OutputBufferTooSmall;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
else => {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.DecompressionFailed;
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compress data using raw deflate (no header/footer).
|
||||||
|
/// Used for PDF FlateDecode filter.
|
||||||
|
pub fn compressDeflate(allocator: std.mem.Allocator, data: []const u8) ![]u8 {
|
||||||
|
return compressDeflateLevel(allocator, data, 6);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compress data using raw deflate with specified compression level.
|
||||||
|
pub fn compressDeflateLevel(allocator: std.mem.Allocator, data: []const u8, level: i32) ![]u8 {
|
||||||
|
const compressor = c.libdeflate_alloc_compressor(level) orelse {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
defer c.libdeflate_free_compressor(compressor);
|
||||||
|
|
||||||
|
const max_size = c.libdeflate_deflate_compress_bound(compressor, data.len);
|
||||||
|
|
||||||
|
var output = allocator.alloc(u8, max_size) catch {
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
|
||||||
|
const actual_size = c.libdeflate_deflate_compress(
|
||||||
|
compressor,
|
||||||
|
data.ptr,
|
||||||
|
data.len,
|
||||||
|
output.ptr,
|
||||||
|
output.len,
|
||||||
|
);
|
||||||
|
|
||||||
|
if (actual_size == 0) {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.CompressionFailed;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (actual_size < output.len) {
|
||||||
|
if (allocator.resize(output, actual_size)) {
|
||||||
|
return output[0..actual_size];
|
||||||
|
} else {
|
||||||
|
const final = allocator.alloc(u8, actual_size) catch {
|
||||||
|
allocator.free(output);
|
||||||
|
return ZlibError.OutOfMemory;
|
||||||
|
};
|
||||||
|
@memcpy(final, output[0..actual_size]);
|
||||||
|
allocator.free(output);
|
||||||
|
return final;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return output;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "compress and decompress roundtrip" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
const original = "Hello, World! This is a test of zlib compression.";
|
||||||
|
const compressed = try compress(allocator, original);
|
||||||
|
defer allocator.free(compressed);
|
||||||
|
|
||||||
|
// Compressed should be different from original
|
||||||
|
try std.testing.expect(!std.mem.eql(u8, original, compressed));
|
||||||
|
|
||||||
|
const decompressed = try decompress(allocator, compressed);
|
||||||
|
defer allocator.free(decompressed);
|
||||||
|
|
||||||
|
try std.testing.expectEqualStrings(original, decompressed);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "compress larger data" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
// Create repetitive data (compresses well)
|
||||||
|
var data: [10000]u8 = undefined;
|
||||||
|
for (&data, 0..) |*b, i| {
|
||||||
|
b.* = @truncate(i % 256);
|
||||||
|
}
|
||||||
|
|
||||||
|
const compressed = try compress(allocator, &data);
|
||||||
|
defer allocator.free(compressed);
|
||||||
|
|
||||||
|
// Should achieve some compression
|
||||||
|
try std.testing.expect(compressed.len < data.len);
|
||||||
|
|
||||||
|
const decompressed = try decompress(allocator, compressed);
|
||||||
|
defer allocator.free(decompressed);
|
||||||
|
|
||||||
|
try std.testing.expectEqualSlices(u8, &data, decompressed);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "deflate roundtrip" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
const original = "Testing raw deflate compression without zlib headers.";
|
||||||
|
const compressed = try compressDeflate(allocator, original);
|
||||||
|
defer allocator.free(compressed);
|
||||||
|
|
||||||
|
const decompressed = try decompressDeflate(allocator, compressed);
|
||||||
|
defer allocator.free(decompressed);
|
||||||
|
|
||||||
|
try std.testing.expectEqualStrings(original, decompressed);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "decompress known zlib data" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
// Pre-compressed "Hello, World!" with zlib (from Python)
|
||||||
|
const compressed = [_]u8{
|
||||||
|
0x78, 0x9c, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xd7,
|
||||||
|
0x51, 0x08, 0xcf, 0x2f, 0xca, 0x49, 0x51, 0x04,
|
||||||
|
0x00, 0x1f, 0x9e, 0x04, 0x6a,
|
||||||
|
};
|
||||||
|
|
||||||
|
const decompressed = try decompress(allocator, &compressed);
|
||||||
|
defer allocator.free(decompressed);
|
||||||
|
|
||||||
|
try std.testing.expectEqualStrings("Hello, World!", decompressed);
|
||||||
|
}
|
||||||
|
|
@ -28,6 +28,9 @@ pub const ContentStream = struct {
|
||||||
|
|
||||||
const Self = @This();
|
const Self = @This();
|
||||||
|
|
||||||
|
/// Default initial capacity for content stream buffer (4KB)
|
||||||
|
pub const default_capacity: usize = 4096;
|
||||||
|
|
||||||
/// Creates a new empty content stream.
|
/// Creates a new empty content stream.
|
||||||
pub fn init(allocator: std.mem.Allocator) Self {
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
return .{
|
return .{
|
||||||
|
|
@ -36,6 +39,23 @@ pub const ContentStream = struct {
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/// Creates a new content stream with pre-allocated capacity.
|
||||||
|
/// Use this for performance when you know approximate content size.
|
||||||
|
pub fn initWithCapacity(allocator: std.mem.Allocator, capacity: usize) !Self {
|
||||||
|
var buffer: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
try buffer.ensureTotalCapacity(allocator, capacity);
|
||||||
|
return .{
|
||||||
|
.buffer = buffer,
|
||||||
|
.allocator = allocator,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Pre-allocates additional capacity for the content stream.
|
||||||
|
/// Useful before adding many operations to reduce allocations.
|
||||||
|
pub fn ensureCapacity(self: *Self, additional: usize) !void {
|
||||||
|
try self.buffer.ensureUnusedCapacity(self.allocator, additional);
|
||||||
|
}
|
||||||
|
|
||||||
/// Frees all memory used by the content stream.
|
/// Frees all memory used by the content stream.
|
||||||
pub fn deinit(self: *Self) void {
|
pub fn deinit(self: *Self) void {
|
||||||
self.buffer.deinit(self.allocator);
|
self.buffer.deinit(self.allocator);
|
||||||
|
|
|
||||||
|
|
@ -1,9 +1,16 @@
|
||||||
//! Fonts module - font types and metrics
|
//! Fonts module - font types and metrics
|
||||||
//!
|
//!
|
||||||
//! Re-exports all font-related types.
|
//! Re-exports all font-related types.
|
||||||
|
//!
|
||||||
|
//! Supports:
|
||||||
|
//! - Type1: 14 standard PDF fonts (Helvetica, Times, Courier, etc.)
|
||||||
|
//! - TrueType: TTF font embedding with Unicode support
|
||||||
|
|
||||||
pub const type1 = @import("type1.zig");
|
pub const type1 = @import("type1.zig");
|
||||||
pub const Font = type1.Font;
|
pub const Font = type1.Font;
|
||||||
pub const FontFamily = type1.FontFamily;
|
pub const FontFamily = type1.FontFamily;
|
||||||
pub const FontState = type1.FontState;
|
pub const FontState = type1.FontState;
|
||||||
pub const Encoding = type1.Encoding;
|
pub const Encoding = type1.Encoding;
|
||||||
|
|
||||||
|
pub const ttf = @import("ttf.zig");
|
||||||
|
pub const TrueTypeFont = ttf.TrueTypeFont;
|
||||||
|
|
|
||||||
605
src/fonts/ttf.zig
Normal file
605
src/fonts/ttf.zig
Normal file
|
|
@ -0,0 +1,605 @@
|
||||||
|
//! TrueType Font (TTF) parser and embedder
|
||||||
|
//!
|
||||||
|
//! Parses TTF files and embeds them in PDF documents as CIDFont Type 2.
|
||||||
|
//! Supports font subsetting to reduce file size.
|
||||||
|
//!
|
||||||
|
//! Based on:
|
||||||
|
//! - TrueType Reference Manual: https://developer.apple.com/fonts/TrueType-Reference-Manual/
|
||||||
|
//! - PDF Reference 1.4, Section 5.6 "Composite Fonts"
|
||||||
|
//! - fpdf2 font embedding implementation
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// TrueType Font data
|
||||||
|
pub const TrueTypeFont = struct {
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
// Font identification
|
||||||
|
family_name: []const u8,
|
||||||
|
subfamily_name: []const u8, // Regular, Bold, Italic, etc.
|
||||||
|
full_name: []const u8,
|
||||||
|
postscript_name: []const u8,
|
||||||
|
|
||||||
|
// Font metrics (from head and hhea tables)
|
||||||
|
units_per_em: u16,
|
||||||
|
ascender: i16,
|
||||||
|
descender: i16,
|
||||||
|
line_gap: i16,
|
||||||
|
cap_height: i16,
|
||||||
|
x_height: i16,
|
||||||
|
stem_v: i16, // Estimated
|
||||||
|
bbox: [4]i16, // xMin, yMin, xMax, yMax
|
||||||
|
italic_angle: f32,
|
||||||
|
flags: u32, // PDF font flags
|
||||||
|
|
||||||
|
// Glyph data
|
||||||
|
num_glyphs: u16,
|
||||||
|
glyph_widths: []u16, // Advance widths for all glyphs
|
||||||
|
cmap: CMapTable, // Character to glyph mapping
|
||||||
|
|
||||||
|
// Raw table data for embedding
|
||||||
|
raw_data: []const u8,
|
||||||
|
table_records: []const TableRecord,
|
||||||
|
|
||||||
|
// Key table offsets
|
||||||
|
glyf_offset: u32,
|
||||||
|
glyf_length: u32,
|
||||||
|
loca_offset: u32,
|
||||||
|
loca_format: u16, // 0 = short, 1 = long
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
/// Parse a TrueType font from file data
|
||||||
|
pub fn parse(allocator: std.mem.Allocator, data: []const u8) !Self {
|
||||||
|
if (data.len < 12) return error.InvalidFont;
|
||||||
|
|
||||||
|
// Check magic number
|
||||||
|
const sfnt_version = readU32Big(data[0..4]);
|
||||||
|
if (sfnt_version != 0x00010000 and sfnt_version != 0x74727565) {
|
||||||
|
// 0x00010000 = TrueType, 0x74727565 = 'true' (old Mac)
|
||||||
|
return error.NotTrueTypeFont;
|
||||||
|
}
|
||||||
|
|
||||||
|
const num_tables = readU16Big(data[4..6]);
|
||||||
|
if (data.len < 12 + @as(usize, num_tables) * 16) return error.InvalidFont;
|
||||||
|
|
||||||
|
// Parse table directory
|
||||||
|
var table_records = try allocator.alloc(TableRecord, num_tables);
|
||||||
|
errdefer allocator.free(table_records);
|
||||||
|
|
||||||
|
for (0..num_tables) |i| {
|
||||||
|
const offset = 12 + i * 16;
|
||||||
|
table_records[i] = .{
|
||||||
|
.tag = data[offset..][0..4].*,
|
||||||
|
.checksum = readU32Big(data[offset + 4 ..][0..4]),
|
||||||
|
.offset = readU32Big(data[offset + 8 ..][0..4]),
|
||||||
|
.length = readU32Big(data[offset + 12 ..][0..4]),
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
var font = Self{
|
||||||
|
.allocator = allocator,
|
||||||
|
.family_name = &[_]u8{},
|
||||||
|
.subfamily_name = &[_]u8{},
|
||||||
|
.full_name = &[_]u8{},
|
||||||
|
.postscript_name = &[_]u8{},
|
||||||
|
.units_per_em = 1000,
|
||||||
|
.ascender = 0,
|
||||||
|
.descender = 0,
|
||||||
|
.line_gap = 0,
|
||||||
|
.cap_height = 0,
|
||||||
|
.x_height = 0,
|
||||||
|
.stem_v = 80,
|
||||||
|
.bbox = .{ 0, 0, 0, 0 },
|
||||||
|
.italic_angle = 0,
|
||||||
|
.flags = 0,
|
||||||
|
.num_glyphs = 0,
|
||||||
|
.glyph_widths = &[_]u16{},
|
||||||
|
.cmap = .{ .format = 0, .data = &[_]u8{} },
|
||||||
|
.raw_data = data,
|
||||||
|
.table_records = table_records,
|
||||||
|
.glyf_offset = 0,
|
||||||
|
.glyf_length = 0,
|
||||||
|
.loca_offset = 0,
|
||||||
|
.loca_format = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Parse required tables
|
||||||
|
try font.parseHead(data);
|
||||||
|
try font.parseHhea(data);
|
||||||
|
try font.parseMaxp(data);
|
||||||
|
try font.parseHmtx(data);
|
||||||
|
try font.parseCmap(data);
|
||||||
|
try font.parseName(data);
|
||||||
|
font.parseOs2(data) catch {}; // Optional
|
||||||
|
font.parsePost(data) catch {}; // Optional
|
||||||
|
|
||||||
|
// Find glyf and loca tables
|
||||||
|
for (table_records) |rec| {
|
||||||
|
if (std.mem.eql(u8, &rec.tag, "glyf")) {
|
||||||
|
font.glyf_offset = rec.offset;
|
||||||
|
font.glyf_length = rec.length;
|
||||||
|
} else if (std.mem.eql(u8, &rec.tag, "loca")) {
|
||||||
|
font.loca_offset = rec.offset;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Calculate PDF font flags
|
||||||
|
font.calculateFlags();
|
||||||
|
|
||||||
|
return font;
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
if (self.glyph_widths.len > 0) {
|
||||||
|
self.allocator.free(self.glyph_widths);
|
||||||
|
}
|
||||||
|
self.allocator.free(self.table_records);
|
||||||
|
if (self.family_name.len > 0) self.allocator.free(self.family_name);
|
||||||
|
if (self.subfamily_name.len > 0) self.allocator.free(self.subfamily_name);
|
||||||
|
if (self.full_name.len > 0) self.allocator.free(self.full_name);
|
||||||
|
if (self.postscript_name.len > 0) self.allocator.free(self.postscript_name);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get glyph index for a Unicode codepoint
|
||||||
|
pub fn getGlyphIndex(self: *const Self, codepoint: u32) u16 {
|
||||||
|
return self.cmap.getGlyphIndex(self.raw_data, codepoint);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get glyph width in font units
|
||||||
|
pub fn getGlyphWidth(self: *const Self, glyph_id: u16) u16 {
|
||||||
|
if (glyph_id < self.glyph_widths.len) {
|
||||||
|
return self.glyph_widths[glyph_id];
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get character width in font units
|
||||||
|
pub fn getCharWidth(self: *const Self, codepoint: u32) u16 {
|
||||||
|
const glyph_id = self.getGlyphIndex(codepoint);
|
||||||
|
return self.getGlyphWidth(glyph_id);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Calculate string width in points
|
||||||
|
pub fn stringWidth(self: *const Self, text: []const u8, font_size: f32) f32 {
|
||||||
|
var total: u32 = 0;
|
||||||
|
for (text) |c| {
|
||||||
|
total += self.getCharWidth(c);
|
||||||
|
}
|
||||||
|
return @as(f32, @floatFromInt(total)) * font_size / @as(f32, @floatFromInt(self.units_per_em));
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Create a font subset containing only the specified glyphs
|
||||||
|
pub fn createSubset(self: *const Self, allocator: std.mem.Allocator, glyph_ids: []const u16) ![]u8 {
|
||||||
|
// For now, return the full font data
|
||||||
|
// TODO: Implement proper subsetting
|
||||||
|
_ = glyph_ids;
|
||||||
|
const result = try allocator.dupe(u8, self.raw_data);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Table Parsing
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
fn findTable(self: *const Self, tag: *const [4]u8) ?TableRecord {
|
||||||
|
for (self.table_records) |rec| {
|
||||||
|
if (std.mem.eql(u8, &rec.tag, tag)) {
|
||||||
|
return rec;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseHead(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("head") orelse return error.MissingHeadTable;
|
||||||
|
if (rec.offset + 54 > data.len) return error.InvalidFont;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
self.units_per_em = readU16Big(table[18..20]);
|
||||||
|
self.bbox[0] = @bitCast(readU16Big(table[36..38])); // xMin
|
||||||
|
self.bbox[1] = @bitCast(readU16Big(table[38..40])); // yMin
|
||||||
|
self.bbox[2] = @bitCast(readU16Big(table[40..42])); // xMax
|
||||||
|
self.bbox[3] = @bitCast(readU16Big(table[42..44])); // yMax
|
||||||
|
self.loca_format = readU16Big(table[50..52]);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseHhea(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("hhea") orelse return error.MissingHheaTable;
|
||||||
|
if (rec.offset + 36 > data.len) return error.InvalidFont;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
self.ascender = @bitCast(readU16Big(table[4..6]));
|
||||||
|
self.descender = @bitCast(readU16Big(table[6..8]));
|
||||||
|
self.line_gap = @bitCast(readU16Big(table[8..10]));
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseMaxp(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("maxp") orelse return error.MissingMaxpTable;
|
||||||
|
if (rec.offset + 6 > data.len) return error.InvalidFont;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
self.num_glyphs = readU16Big(table[4..6]);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseHmtx(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("hmtx") orelse return error.MissingHmtxTable;
|
||||||
|
const hhea = self.findTable("hhea") orelse return error.MissingHheaTable;
|
||||||
|
|
||||||
|
const hhea_table = data[hhea.offset..];
|
||||||
|
const num_h_metrics = readU16Big(hhea_table[34..36]);
|
||||||
|
|
||||||
|
self.glyph_widths = try self.allocator.alloc(u16, self.num_glyphs);
|
||||||
|
errdefer self.allocator.free(self.glyph_widths);
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
var last_width: u16 = 0;
|
||||||
|
|
||||||
|
for (0..self.num_glyphs) |i| {
|
||||||
|
if (i < num_h_metrics) {
|
||||||
|
const offset = i * 4;
|
||||||
|
if (rec.offset + offset + 2 > data.len) break;
|
||||||
|
last_width = readU16Big(table[offset..][0..2]);
|
||||||
|
}
|
||||||
|
self.glyph_widths[i] = last_width;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseCmap(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("cmap") orelse return error.MissingCmapTable;
|
||||||
|
if (rec.offset + 4 > data.len) return error.InvalidFont;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
const num_subtables = readU16Big(table[2..4]);
|
||||||
|
|
||||||
|
// Look for Unicode BMP subtable (platform 3, encoding 1 or platform 0)
|
||||||
|
var best_offset: u32 = 0;
|
||||||
|
var best_format: u16 = 0;
|
||||||
|
|
||||||
|
for (0..num_subtables) |i| {
|
||||||
|
const subtable_offset = 4 + i * 8;
|
||||||
|
if (rec.offset + subtable_offset + 8 > data.len) break;
|
||||||
|
|
||||||
|
const platform_id = readU16Big(table[subtable_offset..][0..2]);
|
||||||
|
const encoding_id = readU16Big(table[subtable_offset + 2 ..][0..2]);
|
||||||
|
const offset = readU32Big(table[subtable_offset + 4 ..][0..4]);
|
||||||
|
|
||||||
|
// Prefer platform 3 (Windows), encoding 1 (Unicode BMP)
|
||||||
|
if (platform_id == 3 and encoding_id == 1) {
|
||||||
|
best_offset = offset;
|
||||||
|
if (rec.offset + offset + 2 <= data.len) {
|
||||||
|
best_format = readU16Big(table[offset..][0..2]);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
// Fall back to platform 0 (Unicode)
|
||||||
|
if (platform_id == 0 and best_offset == 0) {
|
||||||
|
best_offset = offset;
|
||||||
|
if (rec.offset + offset + 2 <= data.len) {
|
||||||
|
best_format = readU16Big(table[offset..][0..2]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (best_offset == 0) return error.NoCmapSubtable;
|
||||||
|
|
||||||
|
self.cmap = .{
|
||||||
|
.format = best_format,
|
||||||
|
.offset = rec.offset + best_offset,
|
||||||
|
.data = data,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseName(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("name") orelse return;
|
||||||
|
if (rec.offset + 6 > data.len) return;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
const count = readU16Big(table[2..4]);
|
||||||
|
const string_offset = readU16Big(table[4..6]);
|
||||||
|
|
||||||
|
for (0..count) |i| {
|
||||||
|
const name_offset = 6 + i * 12;
|
||||||
|
if (rec.offset + name_offset + 12 > data.len) break;
|
||||||
|
|
||||||
|
const platform_id = readU16Big(table[name_offset..][0..2]);
|
||||||
|
const encoding_id = readU16Big(table[name_offset + 2 ..][0..2]);
|
||||||
|
const name_id = readU16Big(table[name_offset + 6 ..][0..2]);
|
||||||
|
const length = readU16Big(table[name_offset + 8 ..][0..2]);
|
||||||
|
const offset = readU16Big(table[name_offset + 10 ..][0..2]);
|
||||||
|
|
||||||
|
// Prefer Windows Unicode or Mac Roman
|
||||||
|
if ((platform_id == 3 and encoding_id == 1) or (platform_id == 1 and encoding_id == 0)) {
|
||||||
|
const str_start = rec.offset + string_offset + offset;
|
||||||
|
if (str_start + length > data.len) continue;
|
||||||
|
|
||||||
|
const str_data = data[str_start..][0..length];
|
||||||
|
const decoded = if (platform_id == 3)
|
||||||
|
try decodeUtf16Be(self.allocator, str_data)
|
||||||
|
else
|
||||||
|
try self.allocator.dupe(u8, str_data);
|
||||||
|
|
||||||
|
switch (name_id) {
|
||||||
|
1 => { // Family name
|
||||||
|
if (self.family_name.len > 0) self.allocator.free(self.family_name);
|
||||||
|
self.family_name = decoded;
|
||||||
|
},
|
||||||
|
2 => { // Subfamily name
|
||||||
|
if (self.subfamily_name.len > 0) self.allocator.free(self.subfamily_name);
|
||||||
|
self.subfamily_name = decoded;
|
||||||
|
},
|
||||||
|
4 => { // Full name
|
||||||
|
if (self.full_name.len > 0) self.allocator.free(self.full_name);
|
||||||
|
self.full_name = decoded;
|
||||||
|
},
|
||||||
|
6 => { // PostScript name
|
||||||
|
if (self.postscript_name.len > 0) self.allocator.free(self.postscript_name);
|
||||||
|
self.postscript_name = decoded;
|
||||||
|
},
|
||||||
|
else => self.allocator.free(decoded),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseOs2(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("OS/2") orelse return error.NoOs2Table;
|
||||||
|
if (rec.offset + 78 > data.len) return;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
|
||||||
|
// sTypoAscender/Descender (more accurate than hhea)
|
||||||
|
self.ascender = @bitCast(readU16Big(table[68..70]));
|
||||||
|
self.descender = @bitCast(readU16Big(table[70..72]));
|
||||||
|
self.line_gap = @bitCast(readU16Big(table[72..74]));
|
||||||
|
|
||||||
|
// sCapHeight and sxHeight (if version >= 2)
|
||||||
|
const version = readU16Big(table[0..2]);
|
||||||
|
if (version >= 2 and rec.offset + 96 <= data.len) {
|
||||||
|
self.cap_height = @bitCast(readU16Big(table[88..90]));
|
||||||
|
self.x_height = @bitCast(readU16Big(table[86..88]));
|
||||||
|
}
|
||||||
|
|
||||||
|
// Estimate cap height if not available
|
||||||
|
if (self.cap_height == 0) {
|
||||||
|
self.cap_height = @intCast(@as(u16, @intCast(@max(0, self.ascender))) * 7 / 10);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parsePost(self: *Self, data: []const u8) !void {
|
||||||
|
const rec = self.findTable("post") orelse return error.NoPostTable;
|
||||||
|
if (rec.offset + 32 > data.len) return;
|
||||||
|
|
||||||
|
const table = data[rec.offset..];
|
||||||
|
|
||||||
|
// Italic angle is a Fixed (16.16)
|
||||||
|
const angle_int: i32 = @bitCast(readU32Big(table[4..8]));
|
||||||
|
self.italic_angle = @as(f32, @floatFromInt(angle_int)) / 65536.0;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn calculateFlags(self: *Self) void {
|
||||||
|
var flags: u32 = 0;
|
||||||
|
|
||||||
|
// Fixed pitch (monospace)
|
||||||
|
// We check if all widths are the same
|
||||||
|
if (self.glyph_widths.len > 1) {
|
||||||
|
const first_width = self.glyph_widths[0];
|
||||||
|
var is_fixed = true;
|
||||||
|
for (self.glyph_widths) |w| {
|
||||||
|
if (w != first_width and w != 0) {
|
||||||
|
is_fixed = false;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (is_fixed) flags |= 1; // FixedPitch
|
||||||
|
}
|
||||||
|
|
||||||
|
// Symbolic (assume non-symbolic for now)
|
||||||
|
flags |= 32; // Nonsymbolic
|
||||||
|
|
||||||
|
// Italic
|
||||||
|
if (self.italic_angle != 0) flags |= 64;
|
||||||
|
|
||||||
|
self.flags = flags;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// CMap subtable for character to glyph mapping
|
||||||
|
pub const CMapTable = struct {
|
||||||
|
format: u16,
|
||||||
|
offset: u32 = 0,
|
||||||
|
data: []const u8,
|
||||||
|
|
||||||
|
pub fn getGlyphIndex(self: *const CMapTable, data: []const u8, codepoint: u32) u16 {
|
||||||
|
if (codepoint > 0xFFFF) return 0; // Only BMP for now
|
||||||
|
|
||||||
|
const cp: u16 = @intCast(codepoint);
|
||||||
|
|
||||||
|
return switch (self.format) {
|
||||||
|
0 => self.format0Lookup(data, cp),
|
||||||
|
4 => self.format4Lookup(data, cp),
|
||||||
|
6 => self.format6Lookup(data, cp),
|
||||||
|
12 => self.format12Lookup(data, codepoint),
|
||||||
|
else => 0,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn format0Lookup(self: *const CMapTable, data: []const u8, cp: u16) u16 {
|
||||||
|
if (cp > 255) return 0;
|
||||||
|
if (self.offset + 6 + cp > data.len) return 0;
|
||||||
|
return data[self.offset + 6 + cp];
|
||||||
|
}
|
||||||
|
|
||||||
|
fn format4Lookup(self: *const CMapTable, data: []const u8, cp: u16) u16 {
|
||||||
|
// Validate offset is within bounds
|
||||||
|
if (self.offset >= data.len) return 0;
|
||||||
|
if (self.offset + 14 > data.len) return 0;
|
||||||
|
|
||||||
|
const table = data[self.offset..];
|
||||||
|
if (table.len < 14) return 0;
|
||||||
|
|
||||||
|
const seg_count_x2 = readU16Big(table[6..8]);
|
||||||
|
if (seg_count_x2 == 0) return 0;
|
||||||
|
const seg_count = seg_count_x2 / 2;
|
||||||
|
|
||||||
|
// Binary search for the segment
|
||||||
|
var lo: u16 = 0;
|
||||||
|
var hi: u16 = seg_count;
|
||||||
|
|
||||||
|
while (lo < hi) {
|
||||||
|
const mid = (lo + hi) / 2;
|
||||||
|
const end_code_offset: usize = 14 + @as(usize, mid) * 2;
|
||||||
|
if (end_code_offset + 2 > table.len) return 0;
|
||||||
|
|
||||||
|
const end_code = readU16Big(table[end_code_offset..][0..2]);
|
||||||
|
if (cp > end_code) {
|
||||||
|
lo = mid + 1;
|
||||||
|
} else {
|
||||||
|
hi = mid;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (lo >= seg_count) return 0;
|
||||||
|
|
||||||
|
// Check if cp is in range - use usize for calculations
|
||||||
|
const lo_usize: usize = @intCast(lo);
|
||||||
|
const seg_count_x2_usize: usize = @intCast(seg_count_x2);
|
||||||
|
|
||||||
|
const end_offset: usize = 14 + lo_usize * 2;
|
||||||
|
const start_offset: usize = 16 + seg_count_x2_usize + lo_usize * 2;
|
||||||
|
const delta_offset: usize = 16 + seg_count_x2_usize * 2 + lo_usize * 2;
|
||||||
|
const range_offset_pos: usize = 16 + seg_count_x2_usize * 3 + lo_usize * 2;
|
||||||
|
|
||||||
|
if (range_offset_pos + 2 > table.len) return 0;
|
||||||
|
if (delta_offset + 2 > table.len) return 0;
|
||||||
|
if (start_offset + 2 > table.len) return 0;
|
||||||
|
if (end_offset + 2 > table.len) return 0;
|
||||||
|
|
||||||
|
const end_code = readU16Big(table[end_offset..][0..2]);
|
||||||
|
const start_code = readU16Big(table[start_offset..][0..2]);
|
||||||
|
|
||||||
|
if (cp < start_code or cp > end_code) return 0;
|
||||||
|
|
||||||
|
const id_delta: i16 = @bitCast(readU16Big(table[delta_offset..][0..2]));
|
||||||
|
const id_range_offset = readU16Big(table[range_offset_pos..][0..2]);
|
||||||
|
|
||||||
|
if (id_range_offset == 0) {
|
||||||
|
const result: i32 = @as(i32, cp) + @as(i32, id_delta);
|
||||||
|
return @intCast(@as(u32, @bitCast(result)) & 0xFFFF);
|
||||||
|
} else {
|
||||||
|
const glyph_offset: usize = range_offset_pos + @as(usize, id_range_offset) + @as(usize, cp - start_code) * 2;
|
||||||
|
if (glyph_offset + 2 > table.len) return 0;
|
||||||
|
const glyph_id = readU16Big(table[glyph_offset..][0..2]);
|
||||||
|
if (glyph_id == 0) return 0;
|
||||||
|
const result: i32 = @as(i32, glyph_id) + @as(i32, id_delta);
|
||||||
|
return @intCast(@as(u32, @bitCast(result)) & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn format6Lookup(self: *const CMapTable, data: []const u8, cp: u16) u16 {
|
||||||
|
if (self.offset + 10 > data.len) return 0;
|
||||||
|
|
||||||
|
const table = data[self.offset..];
|
||||||
|
const first_code = readU16Big(table[6..8]);
|
||||||
|
const entry_count = readU16Big(table[8..10]);
|
||||||
|
|
||||||
|
if (cp < first_code or cp >= first_code + entry_count) return 0;
|
||||||
|
|
||||||
|
const idx = cp - first_code;
|
||||||
|
const glyph_offset = 10 + idx * 2;
|
||||||
|
if (self.offset + glyph_offset + 2 > data.len) return 0;
|
||||||
|
|
||||||
|
return readU16Big(table[glyph_offset..][0..2]);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn format12Lookup(self: *const CMapTable, data: []const u8, cp: u32) u16 {
|
||||||
|
if (self.offset + 16 > data.len) return 0;
|
||||||
|
|
||||||
|
const table = data[self.offset..];
|
||||||
|
const num_groups = readU32Big(table[12..16]);
|
||||||
|
|
||||||
|
// Binary search
|
||||||
|
var lo: u32 = 0;
|
||||||
|
var hi: u32 = num_groups;
|
||||||
|
|
||||||
|
while (lo < hi) {
|
||||||
|
const mid = (lo + hi) / 2;
|
||||||
|
const group_offset = 16 + mid * 12;
|
||||||
|
if (self.offset + group_offset + 12 > data.len) return 0;
|
||||||
|
|
||||||
|
const start_char = readU32Big(table[group_offset..][0..4]);
|
||||||
|
const end_char = readU32Big(table[group_offset + 4 ..][0..4]);
|
||||||
|
|
||||||
|
if (cp < start_char) {
|
||||||
|
hi = mid;
|
||||||
|
} else if (cp > end_char) {
|
||||||
|
lo = mid + 1;
|
||||||
|
} else {
|
||||||
|
const start_glyph = readU32Big(table[group_offset + 8 ..][0..4]);
|
||||||
|
return @intCast((start_glyph + cp - start_char) & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Table record in the font directory
|
||||||
|
pub const TableRecord = struct {
|
||||||
|
tag: [4]u8,
|
||||||
|
checksum: u32,
|
||||||
|
offset: u32,
|
||||||
|
length: u32,
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Helper Functions
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
fn readU16Big(bytes: *const [2]u8) u16 {
|
||||||
|
return (@as(u16, bytes[0]) << 8) | @as(u16, bytes[1]);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn readU32Big(bytes: *const [4]u8) u32 {
|
||||||
|
return (@as(u32, bytes[0]) << 24) | (@as(u32, bytes[1]) << 16) |
|
||||||
|
(@as(u32, bytes[2]) << 8) | @as(u32, bytes[3]);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn decodeUtf16Be(allocator: std.mem.Allocator, data: []const u8) ![]u8 {
|
||||||
|
var result: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
errdefer result.deinit(allocator);
|
||||||
|
|
||||||
|
var i: usize = 0;
|
||||||
|
while (i + 1 < data.len) {
|
||||||
|
const cp = (@as(u16, data[i]) << 8) | @as(u16, data[i + 1]);
|
||||||
|
i += 2;
|
||||||
|
|
||||||
|
// Simple ASCII conversion (for font names)
|
||||||
|
if (cp < 128) {
|
||||||
|
try result.append(allocator, @intCast(cp));
|
||||||
|
} else if (cp < 0x800) {
|
||||||
|
try result.append(allocator, @intCast(0xC0 | (cp >> 6)));
|
||||||
|
try result.append(allocator, @intCast(0x80 | (cp & 0x3F)));
|
||||||
|
} else {
|
||||||
|
try result.append(allocator, @intCast(0xE0 | (cp >> 12)));
|
||||||
|
try result.append(allocator, @intCast(0x80 | ((cp >> 6) & 0x3F)));
|
||||||
|
try result.append(allocator, @intCast(0x80 | (cp & 0x3F)));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return result.toOwnedSlice(allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "readU16Big" {
|
||||||
|
const bytes = [_]u8{ 0x01, 0x00 };
|
||||||
|
try std.testing.expectEqual(@as(u16, 256), readU16Big(&bytes));
|
||||||
|
}
|
||||||
|
|
||||||
|
test "readU32Big" {
|
||||||
|
const bytes = [_]u8{ 0x00, 0x01, 0x00, 0x00 };
|
||||||
|
try std.testing.expectEqual(@as(u32, 0x00010000), readU32Big(&bytes));
|
||||||
|
}
|
||||||
244
src/forms/field.zig
Normal file
244
src/forms/field.zig
Normal file
|
|
@ -0,0 +1,244 @@
|
||||||
|
//! Form Field Definitions
|
||||||
|
//!
|
||||||
|
//! Defines the various form field types for PDF AcroForms.
|
||||||
|
//! Reference: PDF 1.4 Spec, Section 8.6 "Interactive Forms"
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// Common form field properties
|
||||||
|
pub const FormField = struct {
|
||||||
|
/// Field name (unique within document)
|
||||||
|
name: []const u8,
|
||||||
|
/// Field rectangle [x, y, width, height]
|
||||||
|
rect: Rect,
|
||||||
|
/// Field type
|
||||||
|
field_type: FieldType,
|
||||||
|
/// Field flags
|
||||||
|
flags: FieldFlags,
|
||||||
|
/// Default value
|
||||||
|
default_value: ?[]const u8 = null,
|
||||||
|
/// Current value
|
||||||
|
value: ?[]const u8 = null,
|
||||||
|
/// Tooltip/alternate description
|
||||||
|
tooltip: ?[]const u8 = null,
|
||||||
|
|
||||||
|
pub const Rect = struct {
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Form field types
|
||||||
|
pub const FieldType = enum {
|
||||||
|
text,
|
||||||
|
checkbox,
|
||||||
|
radio,
|
||||||
|
button,
|
||||||
|
choice,
|
||||||
|
signature,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Text field options
|
||||||
|
pub const TextField = struct {
|
||||||
|
/// Field name
|
||||||
|
name: []const u8,
|
||||||
|
/// Position and size
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
/// Default text value
|
||||||
|
default_value: []const u8 = "",
|
||||||
|
/// Maximum length (0 = unlimited)
|
||||||
|
max_length: u32 = 0,
|
||||||
|
/// Is multiline
|
||||||
|
multiline: bool = false,
|
||||||
|
/// Is password field
|
||||||
|
password: bool = false,
|
||||||
|
/// Is read-only
|
||||||
|
read_only: bool = false,
|
||||||
|
/// Is required
|
||||||
|
required: bool = false,
|
||||||
|
/// Font size (0 = auto)
|
||||||
|
font_size: f32 = 0,
|
||||||
|
/// Border width
|
||||||
|
border_width: f32 = 1,
|
||||||
|
/// Background color (RGB hex, null = transparent)
|
||||||
|
bg_color: ?u32 = 0xFFFFFF,
|
||||||
|
/// Border color (RGB hex)
|
||||||
|
border_color: u32 = 0x000000,
|
||||||
|
/// Text color (RGB hex)
|
||||||
|
text_color: u32 = 0x000000,
|
||||||
|
|
||||||
|
pub fn toFormField(self: TextField) FormField {
|
||||||
|
var flags = FieldFlags{};
|
||||||
|
if (self.multiline) flags.multiline = true;
|
||||||
|
if (self.password) flags.password = true;
|
||||||
|
if (self.read_only) flags.read_only = true;
|
||||||
|
if (self.required) flags.required = true;
|
||||||
|
|
||||||
|
return .{
|
||||||
|
.name = self.name,
|
||||||
|
.rect = .{
|
||||||
|
.x = self.x,
|
||||||
|
.y = self.y,
|
||||||
|
.width = self.width,
|
||||||
|
.height = self.height,
|
||||||
|
},
|
||||||
|
.field_type = .text,
|
||||||
|
.flags = flags,
|
||||||
|
.default_value = if (self.default_value.len > 0) self.default_value else null,
|
||||||
|
.value = if (self.default_value.len > 0) self.default_value else null,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Checkbox field options
|
||||||
|
pub const CheckBox = struct {
|
||||||
|
/// Field name
|
||||||
|
name: []const u8,
|
||||||
|
/// Position and size
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
size: f32 = 12,
|
||||||
|
/// Is checked by default
|
||||||
|
checked: bool = false,
|
||||||
|
/// Is read-only
|
||||||
|
read_only: bool = false,
|
||||||
|
/// Is required
|
||||||
|
required: bool = false,
|
||||||
|
/// Export value when checked
|
||||||
|
export_value: []const u8 = "Yes",
|
||||||
|
/// Border width
|
||||||
|
border_width: f32 = 1,
|
||||||
|
/// Background color (RGB hex)
|
||||||
|
bg_color: u32 = 0xFFFFFF,
|
||||||
|
/// Border color (RGB hex)
|
||||||
|
border_color: u32 = 0x000000,
|
||||||
|
/// Check mark color (RGB hex)
|
||||||
|
check_color: u32 = 0x000000,
|
||||||
|
|
||||||
|
pub fn toFormField(self: CheckBox) FormField {
|
||||||
|
var flags = FieldFlags{};
|
||||||
|
if (self.read_only) flags.read_only = true;
|
||||||
|
if (self.required) flags.required = true;
|
||||||
|
|
||||||
|
return .{
|
||||||
|
.name = self.name,
|
||||||
|
.rect = .{
|
||||||
|
.x = self.x,
|
||||||
|
.y = self.y,
|
||||||
|
.width = self.size,
|
||||||
|
.height = self.size,
|
||||||
|
},
|
||||||
|
.field_type = .checkbox,
|
||||||
|
.flags = flags,
|
||||||
|
.value = if (self.checked) self.export_value else "Off",
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Field flags (PDF 1.4 field flags)
|
||||||
|
pub const FieldFlags = struct {
|
||||||
|
/// Field is read-only
|
||||||
|
read_only: bool = false,
|
||||||
|
/// Field is required
|
||||||
|
required: bool = false,
|
||||||
|
/// Don't export field value
|
||||||
|
no_export: bool = false,
|
||||||
|
/// Text field: multiline
|
||||||
|
multiline: bool = false,
|
||||||
|
/// Text field: password
|
||||||
|
password: bool = false,
|
||||||
|
/// Text field: no spell check
|
||||||
|
no_spell_check: bool = false,
|
||||||
|
/// Text field: no scroll
|
||||||
|
no_scroll: bool = false,
|
||||||
|
/// Text field: comb (divide into max_length cells)
|
||||||
|
comb: bool = false,
|
||||||
|
/// Choice field: combo box
|
||||||
|
combo: bool = false,
|
||||||
|
/// Choice field: editable combo
|
||||||
|
edit: bool = false,
|
||||||
|
/// Choice field: sorted
|
||||||
|
sort: bool = false,
|
||||||
|
/// Choice field: multiple selection
|
||||||
|
multi_select: bool = false,
|
||||||
|
/// Button: no toggle to off
|
||||||
|
no_toggle_to_off: bool = false,
|
||||||
|
/// Button: radio
|
||||||
|
radio: bool = false,
|
||||||
|
/// Button: push button
|
||||||
|
push_button: bool = false,
|
||||||
|
|
||||||
|
/// Convert to PDF Ff (field flags) value
|
||||||
|
pub fn toU32(self: FieldFlags) u32 {
|
||||||
|
var ff: u32 = 0;
|
||||||
|
if (self.read_only) ff |= (1 << 0);
|
||||||
|
if (self.required) ff |= (1 << 1);
|
||||||
|
if (self.no_export) ff |= (1 << 2);
|
||||||
|
if (self.multiline) ff |= (1 << 12);
|
||||||
|
if (self.password) ff |= (1 << 13);
|
||||||
|
if (self.no_toggle_to_off) ff |= (1 << 14);
|
||||||
|
if (self.radio) ff |= (1 << 15);
|
||||||
|
if (self.push_button) ff |= (1 << 16);
|
||||||
|
if (self.combo) ff |= (1 << 17);
|
||||||
|
if (self.edit) ff |= (1 << 18);
|
||||||
|
if (self.sort) ff |= (1 << 19);
|
||||||
|
if (self.no_spell_check) ff |= (1 << 22);
|
||||||
|
if (self.no_scroll) ff |= (1 << 23);
|
||||||
|
if (self.comb) ff |= (1 << 24);
|
||||||
|
if (self.multi_select) ff |= (1 << 21);
|
||||||
|
return ff;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "TextField to FormField" {
|
||||||
|
const text = TextField{
|
||||||
|
.name = "test",
|
||||||
|
.x = 100,
|
||||||
|
.y = 700,
|
||||||
|
.width = 200,
|
||||||
|
.height = 20,
|
||||||
|
.multiline = true,
|
||||||
|
.required = true,
|
||||||
|
};
|
||||||
|
|
||||||
|
const field = text.toFormField();
|
||||||
|
try std.testing.expectEqualStrings("test", field.name);
|
||||||
|
try std.testing.expectEqual(FieldType.text, field.field_type);
|
||||||
|
try std.testing.expect(field.flags.multiline);
|
||||||
|
try std.testing.expect(field.flags.required);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "CheckBox to FormField" {
|
||||||
|
const cb = CheckBox{
|
||||||
|
.name = "agree",
|
||||||
|
.x = 50,
|
||||||
|
.y = 600,
|
||||||
|
.checked = true,
|
||||||
|
};
|
||||||
|
|
||||||
|
const field = cb.toFormField();
|
||||||
|
try std.testing.expectEqualStrings("agree", field.name);
|
||||||
|
try std.testing.expectEqual(FieldType.checkbox, field.field_type);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "FieldFlags toU32" {
|
||||||
|
const flags = FieldFlags{
|
||||||
|
.read_only = true,
|
||||||
|
.required = true,
|
||||||
|
.multiline = true,
|
||||||
|
};
|
||||||
|
|
||||||
|
const value = flags.toU32();
|
||||||
|
try std.testing.expect(value & 1 != 0); // read_only
|
||||||
|
try std.testing.expect(value & 2 != 0); // required
|
||||||
|
try std.testing.expect(value & (1 << 12) != 0); // multiline
|
||||||
|
}
|
||||||
16
src/forms/mod.zig
Normal file
16
src/forms/mod.zig
Normal file
|
|
@ -0,0 +1,16 @@
|
||||||
|
//! Forms module - PDF AcroForms
|
||||||
|
//!
|
||||||
|
//! Implements interactive form fields for PDF documents.
|
||||||
|
//! Based on PDF 1.4 AcroForms specification.
|
||||||
|
//!
|
||||||
|
//! Supports:
|
||||||
|
//! - Text fields (single line, multi-line)
|
||||||
|
//! - Checkboxes
|
||||||
|
//! - Radio buttons (planned)
|
||||||
|
//! - Push buttons (planned)
|
||||||
|
|
||||||
|
pub const field = @import("field.zig");
|
||||||
|
pub const TextField = field.TextField;
|
||||||
|
pub const CheckBox = field.CheckBox;
|
||||||
|
pub const FieldFlags = field.FieldFlags;
|
||||||
|
pub const FormField = field.FormField;
|
||||||
149
src/graphics/extgstate.zig
Normal file
149
src/graphics/extgstate.zig
Normal file
|
|
@ -0,0 +1,149 @@
|
||||||
|
//! ExtGState - Extended Graphics State for PDF
|
||||||
|
//!
|
||||||
|
//! Provides transparency (alpha/opacity) support through Extended Graphics State objects.
|
||||||
|
//! PDF uses ExtGState dictionaries to define opacity values that can be referenced
|
||||||
|
//! in content streams.
|
||||||
|
//!
|
||||||
|
//! Reference: PDF 1.4 Spec, Section 4.3.4 "Graphics State Parameter Dictionaries"
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// Extended Graphics State definition.
|
||||||
|
/// Used for transparency and other advanced graphics state parameters.
|
||||||
|
pub const ExtGState = struct {
|
||||||
|
/// Fill opacity (0.0 = transparent, 1.0 = opaque)
|
||||||
|
fill_opacity: f32 = 1.0,
|
||||||
|
/// Stroke opacity (0.0 = transparent, 1.0 = opaque)
|
||||||
|
stroke_opacity: f32 = 1.0,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
/// Creates an ExtGState with the specified opacities.
|
||||||
|
pub fn init(fill_opacity: f32, stroke_opacity: f32) Self {
|
||||||
|
return .{
|
||||||
|
.fill_opacity = std.math.clamp(fill_opacity, 0.0, 1.0),
|
||||||
|
.stroke_opacity = std.math.clamp(stroke_opacity, 0.0, 1.0),
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates an ExtGState with uniform opacity for both fill and stroke.
|
||||||
|
pub fn uniform(opacity: f32) Self {
|
||||||
|
const clamped = std.math.clamp(opacity, 0.0, 1.0);
|
||||||
|
return .{
|
||||||
|
.fill_opacity = clamped,
|
||||||
|
.stroke_opacity = clamped,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Checks if this state has any transparency (opacity < 1.0).
|
||||||
|
pub fn hasTransparency(self: *const Self) bool {
|
||||||
|
return self.fill_opacity < 1.0 or self.stroke_opacity < 1.0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Checks if this state is equal to another.
|
||||||
|
pub fn eql(self: *const Self, other: *const Self) bool {
|
||||||
|
return self.fill_opacity == other.fill_opacity and
|
||||||
|
self.stroke_opacity == other.stroke_opacity;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Generates a unique name for this state based on opacity values.
|
||||||
|
/// Format: "GSa{fill}s{stroke}" where values are 0-100.
|
||||||
|
pub fn getName(self: *const Self, buf: []u8) []const u8 {
|
||||||
|
const fill_pct: u32 = @intFromFloat(self.fill_opacity * 100);
|
||||||
|
const stroke_pct: u32 = @intFromFloat(self.stroke_opacity * 100);
|
||||||
|
return std.fmt.bufPrint(buf, "GSa{d}s{d}", .{ fill_pct, stroke_pct }) catch "GS";
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Generates the PDF dictionary content for this state.
|
||||||
|
pub fn writePdfDict(self: *const Self, writer: anytype) !void {
|
||||||
|
try writer.writeAll("<< /Type /ExtGState ");
|
||||||
|
try writer.print("/ca {d:.3} ", .{self.fill_opacity}); // Non-stroking (fill) alpha
|
||||||
|
try writer.print("/CA {d:.3} ", .{self.stroke_opacity}); // Stroking alpha
|
||||||
|
try writer.writeAll(">>");
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Registry for Extended Graphics States used in a document.
|
||||||
|
/// Maintains a unique list of states to avoid duplicates.
|
||||||
|
pub const ExtGStateRegistry = struct {
|
||||||
|
states: std.ArrayListUnmanaged(ExtGState),
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
|
return .{
|
||||||
|
.states = .{},
|
||||||
|
.allocator = allocator,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
self.states.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Registers an ExtGState and returns its index.
|
||||||
|
/// If an equivalent state already exists, returns its index without adding a duplicate.
|
||||||
|
pub fn register(self: *Self, state: ExtGState) !usize {
|
||||||
|
// Check for existing equivalent state
|
||||||
|
for (self.states.items, 0..) |existing, i| {
|
||||||
|
if (existing.eql(&state)) {
|
||||||
|
return i;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add new state
|
||||||
|
try self.states.append(self.allocator, state);
|
||||||
|
return self.states.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns all registered states.
|
||||||
|
pub fn getStates(self: *const Self) []const ExtGState {
|
||||||
|
return self.states.items;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the number of registered states.
|
||||||
|
pub fn count(self: *const Self) usize {
|
||||||
|
return self.states.items.len;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "ExtGState init" {
|
||||||
|
const state = ExtGState.init(0.5, 0.75);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 0.5), state.fill_opacity, 0.001);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 0.75), state.stroke_opacity, 0.001);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "ExtGState clamping" {
|
||||||
|
const state = ExtGState.init(-0.5, 1.5);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 0.0), state.fill_opacity, 0.001);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 1.0), state.stroke_opacity, 0.001);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "ExtGState hasTransparency" {
|
||||||
|
const fully_opaque = ExtGState.init(1.0, 1.0);
|
||||||
|
try std.testing.expect(!fully_opaque.hasTransparency());
|
||||||
|
|
||||||
|
const semi = ExtGState.init(0.5, 1.0);
|
||||||
|
try std.testing.expect(semi.hasTransparency());
|
||||||
|
}
|
||||||
|
|
||||||
|
test "ExtGStateRegistry deduplication" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var registry = ExtGStateRegistry.init(allocator);
|
||||||
|
defer registry.deinit();
|
||||||
|
|
||||||
|
const idx1 = try registry.register(ExtGState.init(0.5, 0.5));
|
||||||
|
const idx2 = try registry.register(ExtGState.init(0.5, 0.5)); // Same
|
||||||
|
const idx3 = try registry.register(ExtGState.init(0.75, 0.75)); // Different
|
||||||
|
|
||||||
|
try std.testing.expectEqual(@as(usize, 0), idx1);
|
||||||
|
try std.testing.expectEqual(@as(usize, 0), idx2); // Should be same index
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), idx3); // New index
|
||||||
|
try std.testing.expectEqual(@as(usize, 2), registry.count());
|
||||||
|
}
|
||||||
209
src/graphics/gradient.zig
Normal file
209
src/graphics/gradient.zig
Normal file
|
|
@ -0,0 +1,209 @@
|
||||||
|
//! Gradient - Linear and Radial Gradients for PDF
|
||||||
|
//!
|
||||||
|
//! Implements PDF Shading Patterns (Type 2 - Axial, Type 3 - Radial)
|
||||||
|
//! for creating smooth color transitions.
|
||||||
|
//!
|
||||||
|
//! Reference: PDF 1.4 Spec, Section 4.6 "Patterns" and 4.6.3 "Shading Patterns"
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const Color = @import("color.zig").Color;
|
||||||
|
|
||||||
|
/// Type of gradient
|
||||||
|
pub const GradientType = enum {
|
||||||
|
/// Linear gradient from point A to point B
|
||||||
|
linear,
|
||||||
|
/// Radial gradient from center outward
|
||||||
|
radial,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// A color stop in a gradient
|
||||||
|
pub const ColorStop = struct {
|
||||||
|
/// Position along the gradient (0.0 = start, 1.0 = end)
|
||||||
|
position: f32,
|
||||||
|
/// Color at this position
|
||||||
|
color: Color,
|
||||||
|
|
||||||
|
pub fn init(position: f32, color: Color) ColorStop {
|
||||||
|
return .{
|
||||||
|
.position = std.math.clamp(position, 0.0, 1.0),
|
||||||
|
.color = color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Linear gradient definition
|
||||||
|
pub const LinearGradient = struct {
|
||||||
|
/// Start point X
|
||||||
|
x0: f32,
|
||||||
|
/// Start point Y
|
||||||
|
y0: f32,
|
||||||
|
/// End point X
|
||||||
|
x1: f32,
|
||||||
|
/// End point Y
|
||||||
|
y1: f32,
|
||||||
|
/// Start color (at position 0.0)
|
||||||
|
start_color: Color,
|
||||||
|
/// End color (at position 1.0)
|
||||||
|
end_color: Color,
|
||||||
|
|
||||||
|
/// Creates a simple two-color linear gradient
|
||||||
|
pub fn simple(x0: f32, y0: f32, x1: f32, y1: f32, start_color: Color, end_color: Color) LinearGradient {
|
||||||
|
return .{
|
||||||
|
.x0 = x0,
|
||||||
|
.y0 = y0,
|
||||||
|
.x1 = x1,
|
||||||
|
.y1 = y1,
|
||||||
|
.start_color = start_color,
|
||||||
|
.end_color = end_color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates a horizontal gradient across a rectangle
|
||||||
|
pub fn horizontal(x: f32, y: f32, w: f32, h: f32, start_color: Color, end_color: Color) LinearGradient {
|
||||||
|
_ = h; // Height not needed for horizontal
|
||||||
|
return simple(x, y, x + w, y, start_color, end_color);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates a vertical gradient across a rectangle
|
||||||
|
pub fn vertical(x: f32, y: f32, w: f32, h: f32, start_color: Color, end_color: Color) LinearGradient {
|
||||||
|
_ = w; // Width not needed for vertical
|
||||||
|
return simple(x, y, x, y + h, start_color, end_color);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates a diagonal gradient across a rectangle
|
||||||
|
pub fn diagonal(x: f32, y: f32, w: f32, h: f32, start_color: Color, end_color: Color) LinearGradient {
|
||||||
|
return simple(x, y, x + w, y + h, start_color, end_color);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Radial gradient definition
|
||||||
|
pub const RadialGradient = struct {
|
||||||
|
/// Center X of inner circle
|
||||||
|
x0: f32,
|
||||||
|
/// Center Y of inner circle
|
||||||
|
y0: f32,
|
||||||
|
/// Radius of inner circle (can be 0)
|
||||||
|
r0: f32,
|
||||||
|
/// Center X of outer circle
|
||||||
|
x1: f32,
|
||||||
|
/// Center Y of outer circle
|
||||||
|
y1: f32,
|
||||||
|
/// Radius of outer circle
|
||||||
|
r1: f32,
|
||||||
|
/// Start color (at center)
|
||||||
|
start_color: Color,
|
||||||
|
/// End color (at edge)
|
||||||
|
end_color: Color,
|
||||||
|
|
||||||
|
/// Creates a simple radial gradient from center outward
|
||||||
|
pub fn simple(cx: f32, cy: f32, radius: f32, center_color: Color, edge_color: Color) RadialGradient {
|
||||||
|
return .{
|
||||||
|
.x0 = cx,
|
||||||
|
.y0 = cy,
|
||||||
|
.r0 = 0,
|
||||||
|
.x1 = cx,
|
||||||
|
.y1 = cy,
|
||||||
|
.r1 = radius,
|
||||||
|
.start_color = center_color,
|
||||||
|
.end_color = edge_color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates a radial gradient with offset center (spotlight effect)
|
||||||
|
pub fn spotlight(cx: f32, cy: f32, radius: f32, focus_x: f32, focus_y: f32, center_color: Color, edge_color: Color) RadialGradient {
|
||||||
|
return .{
|
||||||
|
.x0 = focus_x,
|
||||||
|
.y0 = focus_y,
|
||||||
|
.r0 = 0,
|
||||||
|
.x1 = cx,
|
||||||
|
.y1 = cy,
|
||||||
|
.r1 = radius,
|
||||||
|
.start_color = center_color,
|
||||||
|
.end_color = edge_color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Gradient definition (either linear or radial)
|
||||||
|
pub const Gradient = union(GradientType) {
|
||||||
|
linear: LinearGradient,
|
||||||
|
radial: RadialGradient,
|
||||||
|
|
||||||
|
/// Creates a linear gradient
|
||||||
|
pub fn linearGradient(x0: f32, y0: f32, x1: f32, y1: f32, start_color: Color, end_color: Color) Gradient {
|
||||||
|
return .{ .linear = LinearGradient.simple(x0, y0, x1, y1, start_color, end_color) };
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Creates a radial gradient
|
||||||
|
pub fn radialGradient(cx: f32, cy: f32, radius: f32, center_color: Color, edge_color: Color) Gradient {
|
||||||
|
return .{ .radial = RadialGradient.simple(cx, cy, radius, center_color, edge_color) };
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Gradient data for PDF output
|
||||||
|
/// Simplified to store start and end colors directly for two-color gradients
|
||||||
|
pub const GradientData = struct {
|
||||||
|
gradient_type: GradientType,
|
||||||
|
/// For linear: x0, y0, x1, y1. For radial: x0, y0, r0, x1, y1, r1
|
||||||
|
coords: [6]f32,
|
||||||
|
/// Start color (at position 0.0)
|
||||||
|
start_color: Color,
|
||||||
|
/// End color (at position 1.0)
|
||||||
|
end_color: Color,
|
||||||
|
|
||||||
|
pub fn fromLinear(lg: LinearGradient) GradientData {
|
||||||
|
return .{
|
||||||
|
.gradient_type = .linear,
|
||||||
|
.coords = .{ lg.x0, lg.y0, lg.x1, lg.y1, 0, 0 },
|
||||||
|
.start_color = lg.start_color,
|
||||||
|
.end_color = lg.end_color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn fromRadial(rg: RadialGradient) GradientData {
|
||||||
|
return .{
|
||||||
|
.gradient_type = .radial,
|
||||||
|
.coords = .{ rg.x0, rg.y0, rg.r0, rg.x1, rg.y1, rg.r1 },
|
||||||
|
.start_color = rg.start_color,
|
||||||
|
.end_color = rg.end_color,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "LinearGradient simple" {
|
||||||
|
const grad = LinearGradient.simple(0, 0, 100, 100, Color.red, Color.blue);
|
||||||
|
try std.testing.expectEqual(@as(f32, 0), grad.x0);
|
||||||
|
try std.testing.expectEqual(@as(f32, 100), grad.x1);
|
||||||
|
try std.testing.expect(grad.start_color.eql(Color.red));
|
||||||
|
try std.testing.expect(grad.end_color.eql(Color.blue));
|
||||||
|
}
|
||||||
|
|
||||||
|
test "RadialGradient simple" {
|
||||||
|
const grad = RadialGradient.simple(50, 50, 30, Color.white, Color.black);
|
||||||
|
try std.testing.expectEqual(@as(f32, 50), grad.x0);
|
||||||
|
try std.testing.expectEqual(@as(f32, 0), grad.r0);
|
||||||
|
try std.testing.expectEqual(@as(f32, 30), grad.r1);
|
||||||
|
try std.testing.expect(grad.start_color.eql(Color.white));
|
||||||
|
try std.testing.expect(grad.end_color.eql(Color.black));
|
||||||
|
}
|
||||||
|
|
||||||
|
test "ColorStop clamping" {
|
||||||
|
const stop1 = ColorStop.init(-0.5, Color.red);
|
||||||
|
try std.testing.expectEqual(@as(f32, 0.0), stop1.position);
|
||||||
|
|
||||||
|
const stop2 = ColorStop.init(1.5, Color.blue);
|
||||||
|
try std.testing.expectEqual(@as(f32, 1.0), stop2.position);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "GradientData from linear" {
|
||||||
|
const lg = LinearGradient.simple(10, 20, 100, 200, Color.red, Color.green);
|
||||||
|
const data = GradientData.fromLinear(lg);
|
||||||
|
try std.testing.expectEqual(GradientType.linear, data.gradient_type);
|
||||||
|
try std.testing.expectEqual(@as(f32, 10), data.coords[0]);
|
||||||
|
try std.testing.expect(data.start_color.eql(Color.red));
|
||||||
|
try std.testing.expect(data.end_color.eql(Color.green));
|
||||||
|
}
|
||||||
|
|
@ -4,3 +4,15 @@
|
||||||
|
|
||||||
pub const color = @import("color.zig");
|
pub const color = @import("color.zig");
|
||||||
pub const Color = color.Color;
|
pub const Color = color.Color;
|
||||||
|
|
||||||
|
pub const extgstate = @import("extgstate.zig");
|
||||||
|
pub const ExtGState = extgstate.ExtGState;
|
||||||
|
pub const ExtGStateRegistry = extgstate.ExtGStateRegistry;
|
||||||
|
|
||||||
|
pub const gradient = @import("gradient.zig");
|
||||||
|
pub const Gradient = gradient.Gradient;
|
||||||
|
pub const GradientType = gradient.GradientType;
|
||||||
|
pub const LinearGradient = gradient.LinearGradient;
|
||||||
|
pub const RadialGradient = gradient.RadialGradient;
|
||||||
|
pub const ColorStop = gradient.ColorStop;
|
||||||
|
pub const GradientData = gradient.GradientData;
|
||||||
|
|
|
||||||
|
|
@ -36,13 +36,16 @@ pub const ColorSpace = enum {
|
||||||
|
|
||||||
/// PDF filter for image data compression
|
/// PDF filter for image data compression
|
||||||
pub const ImageFilter = enum {
|
pub const ImageFilter = enum {
|
||||||
|
/// No filter - raw uncompressed data
|
||||||
|
none,
|
||||||
/// DCT (JPEG) compression - used for JPEG images
|
/// DCT (JPEG) compression - used for JPEG images
|
||||||
dct_decode,
|
dct_decode,
|
||||||
/// Flate (zlib) compression - used for PNG and other images
|
/// Flate (zlib) compression - used for PNG and other images
|
||||||
flate_decode,
|
flate_decode,
|
||||||
|
|
||||||
pub fn pdfName(self: ImageFilter) []const u8 {
|
pub fn pdfName(self: ImageFilter) ?[]const u8 {
|
||||||
return switch (self) {
|
return switch (self) {
|
||||||
|
.none => null,
|
||||||
.dct_decode => "DCTDecode",
|
.dct_decode => "DCTDecode",
|
||||||
.flate_decode => "FlateDecode",
|
.flate_decode => "FlateDecode",
|
||||||
};
|
};
|
||||||
|
|
@ -129,8 +132,9 @@ test "ColorSpace properties" {
|
||||||
}
|
}
|
||||||
|
|
||||||
test "ImageFilter pdfName" {
|
test "ImageFilter pdfName" {
|
||||||
try std.testing.expectEqualStrings("DCTDecode", ImageFilter.dct_decode.pdfName());
|
try std.testing.expectEqualStrings("DCTDecode", ImageFilter.dct_decode.pdfName().?);
|
||||||
try std.testing.expectEqualStrings("FlateDecode", ImageFilter.flate_decode.pdfName());
|
try std.testing.expectEqualStrings("FlateDecode", ImageFilter.flate_decode.pdfName().?);
|
||||||
|
try std.testing.expect(ImageFilter.none.pdfName() == null);
|
||||||
}
|
}
|
||||||
|
|
||||||
test "ImageInfo aspectRatio" {
|
test "ImageInfo aspectRatio" {
|
||||||
|
|
|
||||||
|
|
@ -1,19 +1,26 @@
|
||||||
//! PNG image parser for PDF embedding
|
//! PNG image parser for PDF embedding
|
||||||
//!
|
//!
|
||||||
//! PNG images need to be decoded and re-encoded for PDF.
|
//! Parses PNG images and prepares them for PDF embedding:
|
||||||
//! - RGB/Grayscale data is compressed with FlateDecode
|
//! - Decompresses zlib data from IDAT chunks
|
||||||
//! - Alpha channel (if present) is stored as a separate soft mask
|
//! - Applies inverse PNG filters (unfiltering)
|
||||||
|
//! - Separates RGB and alpha channels (alpha becomes soft mask)
|
||||||
|
//! - Re-compresses data with FlateDecode for PDF
|
||||||
//!
|
//!
|
||||||
//! NOTE: Full PNG parsing requires complex zlib decompression.
|
//! Supports:
|
||||||
//! This module provides metadata extraction from PNG headers.
|
//! - Grayscale (1, 2, 4, 8, 16 bit)
|
||||||
//! For full PNG support with alpha, consider using external tools
|
//! - RGB (8, 16 bit)
|
||||||
//! to convert PNG to JPEG first, or implement full PNG decompression.
|
//! - Grayscale + Alpha (8, 16 bit)
|
||||||
|
//! - RGBA (8, 16 bit)
|
||||||
|
//! - Indexed/Palette (with PLTE chunk)
|
||||||
|
//!
|
||||||
|
//! Note: Interlaced PNGs are not supported.
|
||||||
|
|
||||||
const std = @import("std");
|
const std = @import("std");
|
||||||
const ImageInfo = @import("image_info.zig").ImageInfo;
|
const ImageInfo = @import("image_info.zig").ImageInfo;
|
||||||
const ColorSpace = @import("image_info.zig").ColorSpace;
|
const ColorSpace = @import("image_info.zig").ColorSpace;
|
||||||
const ImageFilter = @import("image_info.zig").ImageFilter;
|
const ImageFilter = @import("image_info.zig").ImageFilter;
|
||||||
const ImageFormat = @import("image_info.zig").ImageFormat;
|
const ImageFormat = @import("image_info.zig").ImageFormat;
|
||||||
|
const zlib = @import("../compression/zlib.zig");
|
||||||
|
|
||||||
pub const PngError = error{
|
pub const PngError = error{
|
||||||
InvalidSignature,
|
InvalidSignature,
|
||||||
|
|
@ -23,7 +30,10 @@ pub const PngError = error{
|
||||||
UnsupportedBitDepth,
|
UnsupportedBitDepth,
|
||||||
UnsupportedInterlace,
|
UnsupportedInterlace,
|
||||||
InvalidIHDR,
|
InvalidIHDR,
|
||||||
NotImplemented,
|
InvalidFilter,
|
||||||
|
MissingImageData,
|
||||||
|
DecompressionFailed,
|
||||||
|
OutOfMemory,
|
||||||
};
|
};
|
||||||
|
|
||||||
/// PNG color types
|
/// PNG color types
|
||||||
|
|
@ -33,6 +43,20 @@ pub const ColorType = enum(u8) {
|
||||||
indexed = 3,
|
indexed = 3,
|
||||||
grayscale_alpha = 4,
|
grayscale_alpha = 4,
|
||||||
rgba = 6,
|
rgba = 6,
|
||||||
|
|
||||||
|
pub fn hasAlpha(self: ColorType) bool {
|
||||||
|
return self == .grayscale_alpha or self == .rgba;
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn channels(self: ColorType) u8 {
|
||||||
|
return switch (self) {
|
||||||
|
.grayscale => 1,
|
||||||
|
.rgb => 3,
|
||||||
|
.indexed => 1,
|
||||||
|
.grayscale_alpha => 2,
|
||||||
|
.rgba => 4,
|
||||||
|
};
|
||||||
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
/// PNG chunk header
|
/// PNG chunk header
|
||||||
|
|
@ -41,18 +65,50 @@ const ChunkHeader = struct {
|
||||||
chunk_type: [4]u8,
|
chunk_type: [4]u8,
|
||||||
};
|
};
|
||||||
|
|
||||||
/// PNG metadata extracted from header (without full decompression)
|
/// PNG metadata extracted from IHDR
|
||||||
pub const PngMetadata = struct {
|
pub const PngMetadata = struct {
|
||||||
width: u32,
|
width: u32,
|
||||||
height: u32,
|
height: u32,
|
||||||
bit_depth: u8,
|
bit_depth: u8,
|
||||||
color_type: ColorType,
|
color_type: ColorType,
|
||||||
has_alpha: bool,
|
compression: u8,
|
||||||
channels: u8,
|
filter_method: u8,
|
||||||
|
interlace: u8,
|
||||||
|
|
||||||
|
pub fn hasAlpha(self: *const PngMetadata) bool {
|
||||||
|
return self.color_type.hasAlpha();
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn channels(self: *const PngMetadata) u8 {
|
||||||
|
return self.color_type.channels();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Bytes per pixel (rounded up for sub-byte depths)
|
||||||
|
pub fn bytesPerPixel(self: *const PngMetadata) u8 {
|
||||||
|
const bits = @as(u16, self.channels()) * @as(u16, self.bit_depth);
|
||||||
|
return @intCast((bits + 7) / 8);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Bytes per row (without filter byte)
|
||||||
|
pub fn bytesPerRow(self: *const PngMetadata) usize {
|
||||||
|
const bits: usize = @as(usize, self.width) * @as(usize, self.channels()) * @as(usize, self.bit_depth);
|
||||||
|
return (bits + 7) / 8;
|
||||||
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
|
/// Palette entry (RGB)
|
||||||
|
const PaletteEntry = struct {
|
||||||
|
r: u8,
|
||||||
|
g: u8,
|
||||||
|
b: u8,
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Public API
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
/// Extract PNG metadata without full decompression.
|
/// Extract PNG metadata without full decompression.
|
||||||
/// This is useful for getting image dimensions before processing.
|
/// Useful for getting image dimensions before processing.
|
||||||
pub fn parseMetadata(data: []const u8) PngError!PngMetadata {
|
pub fn parseMetadata(data: []const u8) PngError!PngMetadata {
|
||||||
// Validate PNG signature: 89 50 4E 47 0D 0A 1A 0A
|
// Validate PNG signature: 89 50 4E 47 0D 0A 1A 0A
|
||||||
if (data.len < 8) return PngError.InvalidSignature;
|
if (data.len < 8) return PngError.InvalidSignature;
|
||||||
|
|
@ -76,52 +132,643 @@ pub fn parseMetadata(data: []const u8) PngError!PngMetadata {
|
||||||
const height = readU32BE(data, header_pos + 4);
|
const height = readU32BE(data, header_pos + 4);
|
||||||
const bit_depth = data[header_pos + 8];
|
const bit_depth = data[header_pos + 8];
|
||||||
const color_type_raw = data[header_pos + 9];
|
const color_type_raw = data[header_pos + 9];
|
||||||
|
const compression = data[header_pos + 10];
|
||||||
|
const filter_method = data[header_pos + 11];
|
||||||
const interlace = data[header_pos + 12];
|
const interlace = data[header_pos + 12];
|
||||||
|
|
||||||
// Validate parameters
|
// Validate interlace (we don't support interlaced)
|
||||||
if (bit_depth != 8 and bit_depth != 16) return PngError.UnsupportedBitDepth;
|
|
||||||
if (interlace != 0) return PngError.UnsupportedInterlace;
|
if (interlace != 0) return PngError.UnsupportedInterlace;
|
||||||
|
|
||||||
const color_type: ColorType = std.meta.intToEnum(ColorType, color_type_raw) catch {
|
const color_type: ColorType = std.meta.intToEnum(ColorType, color_type_raw) catch {
|
||||||
return PngError.UnsupportedColorType;
|
return PngError.UnsupportedColorType;
|
||||||
};
|
};
|
||||||
|
|
||||||
const channels: u8 = switch (color_type) {
|
// Validate bit depth for color type
|
||||||
.grayscale => 1,
|
const valid_depth = switch (color_type) {
|
||||||
.rgb => 3,
|
.grayscale => bit_depth == 1 or bit_depth == 2 or bit_depth == 4 or bit_depth == 8 or bit_depth == 16,
|
||||||
.grayscale_alpha => 2,
|
.rgb, .grayscale_alpha, .rgba => bit_depth == 8 or bit_depth == 16,
|
||||||
.rgba => 4,
|
.indexed => bit_depth == 1 or bit_depth == 2 or bit_depth == 4 or bit_depth == 8,
|
||||||
.indexed => 1,
|
|
||||||
};
|
};
|
||||||
|
if (!valid_depth) return PngError.UnsupportedBitDepth;
|
||||||
const has_alpha = (color_type == .rgba or color_type == .grayscale_alpha);
|
|
||||||
|
|
||||||
return PngMetadata{
|
return PngMetadata{
|
||||||
.width = width,
|
.width = width,
|
||||||
.height = height,
|
.height = height,
|
||||||
.bit_depth = bit_depth,
|
.bit_depth = bit_depth,
|
||||||
.color_type = color_type,
|
.color_type = color_type,
|
||||||
.has_alpha = has_alpha,
|
.compression = compression,
|
||||||
.channels = channels,
|
.filter_method = filter_method,
|
||||||
|
.interlace = interlace,
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Parse PNG image and prepare for PDF embedding.
|
/// Parse PNG image and prepare for PDF embedding.
|
||||||
/// NOTE: Full PNG parsing is not yet implemented.
|
/// Returns ImageInfo with data ready for PDF XObject.
|
||||||
/// Returns NotImplemented error - use JPEG images instead.
|
pub fn parse(allocator: std.mem.Allocator, data: []const u8) !ImageInfo {
|
||||||
pub fn parse(allocator: std.mem.Allocator, data: []const u8) PngError!ImageInfo {
|
const meta = try parseMetadata(data);
|
||||||
_ = allocator;
|
|
||||||
|
|
||||||
// Get metadata to validate the PNG
|
// Collect all IDAT chunks
|
||||||
_ = try parseMetadata(data);
|
var idat_data: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
defer idat_data.deinit(allocator);
|
||||||
|
|
||||||
// Full PNG decompression not yet implemented
|
// Also look for PLTE (palette) and tRNS (transparency)
|
||||||
// PNG requires zlib decompression, unfiltering, and re-compression
|
var palette: ?[]const PaletteEntry = null;
|
||||||
// For now, recommend converting PNG to JPEG externally
|
var trns_data: ?[]const u8 = null;
|
||||||
return PngError.NotImplemented;
|
defer {
|
||||||
|
if (palette) |p| allocator.free(@as([*]const u8, @ptrCast(p.ptr))[0 .. p.len * 3]);
|
||||||
|
}
|
||||||
|
|
||||||
|
var pos: usize = 8; // Skip signature
|
||||||
|
while (pos + 8 <= data.len) {
|
||||||
|
const chunk = readChunkHeader(data, pos) orelse break;
|
||||||
|
const chunk_data_start = pos + 8;
|
||||||
|
const chunk_data_end = chunk_data_start + chunk.length;
|
||||||
|
|
||||||
|
if (chunk_data_end > data.len) break;
|
||||||
|
|
||||||
|
if (std.mem.eql(u8, &chunk.chunk_type, "IDAT")) {
|
||||||
|
try idat_data.appendSlice(allocator, data[chunk_data_start..chunk_data_end]);
|
||||||
|
} else if (std.mem.eql(u8, &chunk.chunk_type, "PLTE")) {
|
||||||
|
const plte_data = data[chunk_data_start..chunk_data_end];
|
||||||
|
const entry_count = plte_data.len / 3;
|
||||||
|
const entries = try allocator.alloc(PaletteEntry, entry_count);
|
||||||
|
for (entries, 0..) |*e, i| {
|
||||||
|
e.r = plte_data[i * 3];
|
||||||
|
e.g = plte_data[i * 3 + 1];
|
||||||
|
e.b = plte_data[i * 3 + 2];
|
||||||
|
}
|
||||||
|
palette = entries;
|
||||||
|
} else if (std.mem.eql(u8, &chunk.chunk_type, "tRNS")) {
|
||||||
|
trns_data = data[chunk_data_start..chunk_data_end];
|
||||||
|
} else if (std.mem.eql(u8, &chunk.chunk_type, "IEND")) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
pos = chunk_data_end + 4; // +4 for CRC
|
||||||
|
}
|
||||||
|
|
||||||
|
if (idat_data.items.len == 0) return PngError.MissingImageData;
|
||||||
|
|
||||||
|
// Decompress zlib data
|
||||||
|
const raw_data = zlib.decompress(allocator, idat_data.items) catch {
|
||||||
|
return PngError.DecompressionFailed;
|
||||||
|
};
|
||||||
|
defer allocator.free(raw_data);
|
||||||
|
|
||||||
|
// Apply inverse PNG filters
|
||||||
|
const unfiltered = try unfilterImage(allocator, raw_data, &meta);
|
||||||
|
defer allocator.free(unfiltered);
|
||||||
|
|
||||||
|
// Process based on color type
|
||||||
|
return try processImage(allocator, unfiltered, &meta, palette, trns_data);
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Read big-endian u32
|
// =============================================================================
|
||||||
|
// PNG Unfiltering
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
/// Apply inverse PNG filters to raw scanline data
|
||||||
|
fn unfilterImage(allocator: std.mem.Allocator, raw: []const u8, meta: *const PngMetadata) ![]u8 {
|
||||||
|
const bytes_per_row = meta.bytesPerRow();
|
||||||
|
const bpp = meta.bytesPerPixel();
|
||||||
|
const height = meta.height;
|
||||||
|
|
||||||
|
// Each row has 1 filter byte + pixel data
|
||||||
|
const expected_size = height * (bytes_per_row + 1);
|
||||||
|
if (raw.len < expected_size) {
|
||||||
|
return PngError.UnexpectedEndOfData;
|
||||||
|
}
|
||||||
|
|
||||||
|
var output = try allocator.alloc(u8, height * bytes_per_row);
|
||||||
|
errdefer allocator.free(output);
|
||||||
|
|
||||||
|
var prev_row: ?[]const u8 = null;
|
||||||
|
|
||||||
|
for (0..height) |y| {
|
||||||
|
const row_start = y * (bytes_per_row + 1);
|
||||||
|
const filter_type = raw[row_start];
|
||||||
|
const row_data = raw[row_start + 1 .. row_start + 1 + bytes_per_row];
|
||||||
|
const out_row = output[y * bytes_per_row .. (y + 1) * bytes_per_row];
|
||||||
|
|
||||||
|
switch (filter_type) {
|
||||||
|
0 => { // None
|
||||||
|
@memcpy(out_row, row_data);
|
||||||
|
},
|
||||||
|
1 => { // Sub
|
||||||
|
unfilterSub(out_row, row_data, bpp);
|
||||||
|
},
|
||||||
|
2 => { // Up
|
||||||
|
unfilterUp(out_row, row_data, prev_row);
|
||||||
|
},
|
||||||
|
3 => { // Average
|
||||||
|
unfilterAverage(out_row, row_data, prev_row, bpp);
|
||||||
|
},
|
||||||
|
4 => { // Paeth
|
||||||
|
unfilterPaeth(out_row, row_data, prev_row, bpp);
|
||||||
|
},
|
||||||
|
else => {
|
||||||
|
return PngError.InvalidFilter;
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
prev_row = out_row;
|
||||||
|
}
|
||||||
|
|
||||||
|
return output;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unfilterSub(out: []u8, row: []const u8, bpp: u8) void {
|
||||||
|
for (out, 0..) |*byte, i| {
|
||||||
|
const a: u8 = if (i >= bpp) out[i - bpp] else 0;
|
||||||
|
byte.* = row[i] +% a;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unfilterUp(out: []u8, row: []const u8, prev_row: ?[]const u8) void {
|
||||||
|
for (out, 0..) |*byte, i| {
|
||||||
|
const b: u8 = if (prev_row) |prev| prev[i] else 0;
|
||||||
|
byte.* = row[i] +% b;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unfilterAverage(out: []u8, row: []const u8, prev_row: ?[]const u8, bpp: u8) void {
|
||||||
|
for (out, 0..) |*byte, i| {
|
||||||
|
const a: u16 = if (i >= bpp) out[i - bpp] else 0;
|
||||||
|
const b: u16 = if (prev_row) |prev| prev[i] else 0;
|
||||||
|
byte.* = row[i] +% @as(u8, @intCast((a + b) / 2));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unfilterPaeth(out: []u8, row: []const u8, prev_row: ?[]const u8, bpp: u8) void {
|
||||||
|
for (out, 0..) |*byte, i| {
|
||||||
|
const a: i16 = if (i >= bpp) out[i - bpp] else 0;
|
||||||
|
const b: i16 = if (prev_row) |prev| prev[i] else 0;
|
||||||
|
const c: i16 = if (i >= bpp and prev_row != null) prev_row.?[i - bpp] else 0;
|
||||||
|
byte.* = row[i] +% paethPredictor(a, b, c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn paethPredictor(a: i16, b: i16, c: i16) u8 {
|
||||||
|
const p = a + b - c;
|
||||||
|
const pa = @abs(p - a);
|
||||||
|
const pb = @abs(p - b);
|
||||||
|
const pc = @abs(p - c);
|
||||||
|
|
||||||
|
if (pa <= pb and pa <= pc) {
|
||||||
|
return @intCast(a & 0xFF);
|
||||||
|
} else if (pb <= pc) {
|
||||||
|
return @intCast(b & 0xFF);
|
||||||
|
} else {
|
||||||
|
return @intCast(c & 0xFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Image Processing for PDF
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
fn processImage(
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
pixels: []const u8,
|
||||||
|
meta: *const PngMetadata,
|
||||||
|
palette: ?[]const PaletteEntry,
|
||||||
|
trns: ?[]const u8,
|
||||||
|
) !ImageInfo {
|
||||||
|
switch (meta.color_type) {
|
||||||
|
.grayscale => {
|
||||||
|
return try processGrayscale(allocator, pixels, meta, trns);
|
||||||
|
},
|
||||||
|
.rgb => {
|
||||||
|
return try processRgb(allocator, pixels, meta, trns);
|
||||||
|
},
|
||||||
|
.indexed => {
|
||||||
|
return try processIndexed(allocator, pixels, meta, palette orelse return PngError.UnsupportedColorType, trns);
|
||||||
|
},
|
||||||
|
.grayscale_alpha => {
|
||||||
|
return try processGrayscaleAlpha(allocator, pixels, meta);
|
||||||
|
},
|
||||||
|
.rgba => {
|
||||||
|
return try processRgba(allocator, pixels, meta);
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn processGrayscale(allocator: std.mem.Allocator, pixels: []const u8, meta: *const PngMetadata, trns: ?[]const u8) !ImageInfo {
|
||||||
|
// For 16-bit, downsample to 8-bit
|
||||||
|
var data: []u8 = undefined;
|
||||||
|
var soft_mask: ?[]u8 = null;
|
||||||
|
|
||||||
|
if (meta.bit_depth == 16) {
|
||||||
|
// Take high byte of each 16-bit sample
|
||||||
|
const sample_count = meta.width * meta.height;
|
||||||
|
data = try allocator.alloc(u8, sample_count);
|
||||||
|
for (0..sample_count) |i| {
|
||||||
|
data[i] = pixels[i * 2]; // High byte
|
||||||
|
}
|
||||||
|
} else if (meta.bit_depth < 8) {
|
||||||
|
// Expand to 8-bit
|
||||||
|
data = try expandBits(allocator, pixels, meta);
|
||||||
|
} else {
|
||||||
|
data = try allocator.dupe(u8, pixels);
|
||||||
|
}
|
||||||
|
errdefer allocator.free(data);
|
||||||
|
|
||||||
|
// Handle tRNS transparency (single gray value)
|
||||||
|
if (trns) |t| {
|
||||||
|
if (t.len >= 2) {
|
||||||
|
const transparent_gray = t[1]; // Low byte of 16-bit value
|
||||||
|
const sample_count = meta.width * meta.height;
|
||||||
|
soft_mask = try allocator.alloc(u8, sample_count);
|
||||||
|
for (0..sample_count) |i| {
|
||||||
|
soft_mask.?[i] = if (data[i] == transparent_gray) 0 else 255;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Compress data for PDF FlateDecode
|
||||||
|
const compressed_data = zlib.compressDeflate(allocator, data) catch {
|
||||||
|
// If compression fails, return uncompressed
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_gray,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .none,
|
||||||
|
.data = data,
|
||||||
|
.soft_mask = soft_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(data);
|
||||||
|
|
||||||
|
// Compress soft mask if present
|
||||||
|
var compressed_mask: ?[]u8 = null;
|
||||||
|
if (soft_mask) |mask| {
|
||||||
|
compressed_mask = zlib.compressDeflate(allocator, mask) catch null;
|
||||||
|
allocator.free(mask);
|
||||||
|
}
|
||||||
|
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_gray,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_data,
|
||||||
|
.soft_mask = compressed_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn processRgb(allocator: std.mem.Allocator, pixels: []const u8, meta: *const PngMetadata, trns: ?[]const u8) !ImageInfo {
|
||||||
|
var data: []u8 = undefined;
|
||||||
|
var soft_mask: ?[]u8 = null;
|
||||||
|
const pixel_count = meta.width * meta.height;
|
||||||
|
|
||||||
|
if (meta.bit_depth == 16) {
|
||||||
|
// Downsample 16-bit RGB to 8-bit
|
||||||
|
data = try allocator.alloc(u8, pixel_count * 3);
|
||||||
|
for (0..pixel_count) |i| {
|
||||||
|
data[i * 3] = pixels[i * 6]; // R high byte
|
||||||
|
data[i * 3 + 1] = pixels[i * 6 + 2]; // G high byte
|
||||||
|
data[i * 3 + 2] = pixels[i * 6 + 4]; // B high byte
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
data = try allocator.dupe(u8, pixels);
|
||||||
|
}
|
||||||
|
errdefer allocator.free(data);
|
||||||
|
|
||||||
|
// Handle tRNS transparency (single RGB value)
|
||||||
|
if (trns) |t| {
|
||||||
|
if (t.len >= 6) {
|
||||||
|
const tr = t[1]; // Low bytes
|
||||||
|
const tg = t[3];
|
||||||
|
const tb = t[5];
|
||||||
|
soft_mask = try allocator.alloc(u8, pixel_count);
|
||||||
|
for (0..pixel_count) |i| {
|
||||||
|
const r = data[i * 3];
|
||||||
|
const g = data[i * 3 + 1];
|
||||||
|
const b = data[i * 3 + 2];
|
||||||
|
soft_mask.?[i] = if (r == tr and g == tg and b == tb) 0 else 255;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Compress data for PDF FlateDecode
|
||||||
|
const compressed_data = zlib.compressDeflate(allocator, data) catch {
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .none,
|
||||||
|
.data = data,
|
||||||
|
.soft_mask = soft_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(data);
|
||||||
|
|
||||||
|
// Compress soft mask if present
|
||||||
|
var compressed_mask: ?[]u8 = null;
|
||||||
|
if (soft_mask) |mask| {
|
||||||
|
compressed_mask = zlib.compressDeflate(allocator, mask) catch null;
|
||||||
|
allocator.free(mask);
|
||||||
|
}
|
||||||
|
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_data,
|
||||||
|
.soft_mask = compressed_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn processIndexed(
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
pixels: []const u8,
|
||||||
|
meta: *const PngMetadata,
|
||||||
|
palette: []const PaletteEntry,
|
||||||
|
trns: ?[]const u8,
|
||||||
|
) !ImageInfo {
|
||||||
|
const pixel_count = meta.width * meta.height;
|
||||||
|
|
||||||
|
// Expand indices to RGB
|
||||||
|
var indices: []u8 = undefined;
|
||||||
|
if (meta.bit_depth < 8) {
|
||||||
|
indices = try expandBits(allocator, pixels, meta);
|
||||||
|
} else {
|
||||||
|
indices = @constCast(pixels);
|
||||||
|
}
|
||||||
|
defer if (meta.bit_depth < 8) allocator.free(indices);
|
||||||
|
|
||||||
|
var rgb_data = try allocator.alloc(u8, pixel_count * 3);
|
||||||
|
errdefer allocator.free(rgb_data);
|
||||||
|
|
||||||
|
var soft_mask: ?[]u8 = null;
|
||||||
|
if (trns != null) {
|
||||||
|
soft_mask = try allocator.alloc(u8, pixel_count);
|
||||||
|
}
|
||||||
|
errdefer if (soft_mask) |m| allocator.free(m);
|
||||||
|
|
||||||
|
for (0..pixel_count) |i| {
|
||||||
|
const idx = indices[i];
|
||||||
|
if (idx < palette.len) {
|
||||||
|
rgb_data[i * 3] = palette[idx].r;
|
||||||
|
rgb_data[i * 3 + 1] = palette[idx].g;
|
||||||
|
rgb_data[i * 3 + 2] = palette[idx].b;
|
||||||
|
} else {
|
||||||
|
rgb_data[i * 3] = 0;
|
||||||
|
rgb_data[i * 3 + 1] = 0;
|
||||||
|
rgb_data[i * 3 + 2] = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (soft_mask) |mask| {
|
||||||
|
if (trns) |t| {
|
||||||
|
mask[i] = if (idx < t.len) t[idx] else 255;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Compress data for PDF FlateDecode
|
||||||
|
const compressed_data = zlib.compressDeflate(allocator, rgb_data) catch {
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .none,
|
||||||
|
.data = rgb_data,
|
||||||
|
.soft_mask = soft_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(rgb_data);
|
||||||
|
|
||||||
|
// Compress soft mask if present
|
||||||
|
var compressed_mask: ?[]u8 = null;
|
||||||
|
if (soft_mask) |mask| {
|
||||||
|
compressed_mask = zlib.compressDeflate(allocator, mask) catch null;
|
||||||
|
allocator.free(mask);
|
||||||
|
}
|
||||||
|
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_data,
|
||||||
|
.soft_mask = compressed_mask,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn processGrayscaleAlpha(allocator: std.mem.Allocator, pixels: []const u8, meta: *const PngMetadata) !ImageInfo {
|
||||||
|
const pixel_count = meta.width * meta.height;
|
||||||
|
const bytes_per_sample: usize = if (meta.bit_depth == 16) 2 else 1;
|
||||||
|
|
||||||
|
var gray_data = try allocator.alloc(u8, pixel_count);
|
||||||
|
errdefer allocator.free(gray_data);
|
||||||
|
|
||||||
|
var alpha_data = try allocator.alloc(u8, pixel_count);
|
||||||
|
errdefer allocator.free(alpha_data);
|
||||||
|
|
||||||
|
for (0..pixel_count) |i| {
|
||||||
|
if (bytes_per_sample == 2) {
|
||||||
|
gray_data[i] = pixels[i * 4]; // Gray high byte
|
||||||
|
alpha_data[i] = pixels[i * 4 + 2]; // Alpha high byte
|
||||||
|
} else {
|
||||||
|
gray_data[i] = pixels[i * 2];
|
||||||
|
alpha_data[i] = pixels[i * 2 + 1];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Compress data for PDF FlateDecode
|
||||||
|
const compressed_gray = zlib.compressDeflate(allocator, gray_data) catch {
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_gray,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .none,
|
||||||
|
.data = gray_data,
|
||||||
|
.soft_mask = alpha_data,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(gray_data);
|
||||||
|
|
||||||
|
// Compress alpha mask
|
||||||
|
const compressed_alpha = zlib.compressDeflate(allocator, alpha_data) catch {
|
||||||
|
allocator.free(alpha_data);
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_gray,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_gray,
|
||||||
|
.soft_mask = null,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(alpha_data);
|
||||||
|
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_gray,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_gray,
|
||||||
|
.soft_mask = compressed_alpha,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn processRgba(allocator: std.mem.Allocator, pixels: []const u8, meta: *const PngMetadata) !ImageInfo {
|
||||||
|
const pixel_count = meta.width * meta.height;
|
||||||
|
const bytes_per_sample: usize = if (meta.bit_depth == 16) 2 else 1;
|
||||||
|
const bytes_per_pixel = 4 * bytes_per_sample;
|
||||||
|
|
||||||
|
var rgb_data = try allocator.alloc(u8, pixel_count * 3);
|
||||||
|
errdefer allocator.free(rgb_data);
|
||||||
|
|
||||||
|
var alpha_data = try allocator.alloc(u8, pixel_count);
|
||||||
|
errdefer allocator.free(alpha_data);
|
||||||
|
|
||||||
|
for (0..pixel_count) |i| {
|
||||||
|
const src_offset = i * bytes_per_pixel;
|
||||||
|
if (bytes_per_sample == 2) {
|
||||||
|
// 16-bit: take high bytes
|
||||||
|
rgb_data[i * 3] = pixels[src_offset]; // R
|
||||||
|
rgb_data[i * 3 + 1] = pixels[src_offset + 2]; // G
|
||||||
|
rgb_data[i * 3 + 2] = pixels[src_offset + 4]; // B
|
||||||
|
alpha_data[i] = pixels[src_offset + 6]; // A
|
||||||
|
} else {
|
||||||
|
// 8-bit
|
||||||
|
rgb_data[i * 3] = pixels[src_offset]; // R
|
||||||
|
rgb_data[i * 3 + 1] = pixels[src_offset + 1]; // G
|
||||||
|
rgb_data[i * 3 + 2] = pixels[src_offset + 2]; // B
|
||||||
|
alpha_data[i] = pixels[src_offset + 3]; // A
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Compress data for PDF FlateDecode
|
||||||
|
const compressed_rgb = zlib.compressDeflate(allocator, rgb_data) catch {
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .none,
|
||||||
|
.data = rgb_data,
|
||||||
|
.soft_mask = alpha_data,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(rgb_data);
|
||||||
|
|
||||||
|
// Compress alpha mask
|
||||||
|
const compressed_alpha = zlib.compressDeflate(allocator, alpha_data) catch {
|
||||||
|
allocator.free(alpha_data);
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_rgb,
|
||||||
|
.soft_mask = null,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
allocator.free(alpha_data);
|
||||||
|
|
||||||
|
return ImageInfo{
|
||||||
|
.width = meta.width,
|
||||||
|
.height = meta.height,
|
||||||
|
.color_space = .device_rgb,
|
||||||
|
.bits_per_component = 8,
|
||||||
|
.filter = .flate_decode,
|
||||||
|
.data = compressed_rgb,
|
||||||
|
.soft_mask = compressed_alpha,
|
||||||
|
.owns_data = true,
|
||||||
|
.invert_cmyk = false,
|
||||||
|
.format = .png,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Expand sub-byte pixel data to 8-bit
|
||||||
|
fn expandBits(allocator: std.mem.Allocator, packed_data: []const u8, meta: *const PngMetadata) ![]u8 {
|
||||||
|
const pixel_count = meta.width * meta.height;
|
||||||
|
var expanded = try allocator.alloc(u8, pixel_count);
|
||||||
|
errdefer allocator.free(expanded);
|
||||||
|
|
||||||
|
const bit_depth = meta.bit_depth;
|
||||||
|
const pixels_per_byte: u8 = 8 / bit_depth;
|
||||||
|
const mask: u8 = (@as(u8, 1) << @intCast(bit_depth)) - 1;
|
||||||
|
const scale: u8 = 255 / mask;
|
||||||
|
|
||||||
|
var pixel_idx: usize = 0;
|
||||||
|
var byte_idx: usize = 0;
|
||||||
|
var row: usize = 0;
|
||||||
|
|
||||||
|
while (pixel_idx < pixel_count and byte_idx < packed_data.len) {
|
||||||
|
const byte = packed_data[byte_idx];
|
||||||
|
var bit_pos: u8 = 8;
|
||||||
|
|
||||||
|
const pixels_in_row = @min(pixels_per_byte, meta.width - (pixel_idx - row * meta.width));
|
||||||
|
for (0..pixels_in_row) |_| {
|
||||||
|
if (pixel_idx >= pixel_count) break;
|
||||||
|
bit_pos -= bit_depth;
|
||||||
|
const value = (byte >> @intCast(bit_pos)) & mask;
|
||||||
|
expanded[pixel_idx] = value * scale;
|
||||||
|
pixel_idx += 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
byte_idx += 1;
|
||||||
|
|
||||||
|
// Check for end of row
|
||||||
|
if (pixel_idx > 0 and pixel_idx % meta.width == 0) {
|
||||||
|
row += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return expanded;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Helper Functions
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
fn readU32BE(data: []const u8, pos: usize) u32 {
|
fn readU32BE(data: []const u8, pos: usize) u32 {
|
||||||
return (@as(u32, data[pos]) << 24) |
|
return (@as(u32, data[pos]) << 24) |
|
||||||
(@as(u32, data[pos + 1]) << 16) |
|
(@as(u32, data[pos + 1]) << 16) |
|
||||||
|
|
@ -129,7 +776,6 @@ fn readU32BE(data: []const u8, pos: usize) u32 {
|
||||||
@as(u32, data[pos + 3]);
|
@as(u32, data[pos + 3]);
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Read chunk header
|
|
||||||
fn readChunkHeader(data: []const u8, pos: usize) ?ChunkHeader {
|
fn readChunkHeader(data: []const u8, pos: usize) ?ChunkHeader {
|
||||||
if (pos + 8 > data.len) return null;
|
if (pos + 8 > data.len) return null;
|
||||||
return ChunkHeader{
|
return ChunkHeader{
|
||||||
|
|
@ -180,11 +826,11 @@ test "parse PNG metadata" {
|
||||||
try std.testing.expectEqual(@as(u32, 200), meta.height);
|
try std.testing.expectEqual(@as(u32, 200), meta.height);
|
||||||
try std.testing.expectEqual(@as(u8, 8), meta.bit_depth);
|
try std.testing.expectEqual(@as(u8, 8), meta.bit_depth);
|
||||||
try std.testing.expectEqual(ColorType.rgb, meta.color_type);
|
try std.testing.expectEqual(ColorType.rgb, meta.color_type);
|
||||||
try std.testing.expectEqual(false, meta.has_alpha);
|
try std.testing.expectEqual(false, meta.hasAlpha());
|
||||||
try std.testing.expectEqual(@as(u8, 3), meta.channels);
|
try std.testing.expectEqual(@as(u8, 3), meta.channels());
|
||||||
}
|
}
|
||||||
|
|
||||||
test "parse PNG with alpha" {
|
test "parse PNG with alpha metadata" {
|
||||||
const png_data = [_]u8{
|
const png_data = [_]u8{
|
||||||
0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, // PNG signature
|
0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, // PNG signature
|
||||||
0x00, 0x00, 0x00, 0x0D, // IHDR length: 13
|
0x00, 0x00, 0x00, 0x0D, // IHDR length: 13
|
||||||
|
|
@ -202,6 +848,42 @@ test "parse PNG with alpha" {
|
||||||
try std.testing.expectEqual(@as(u32, 32), meta.width);
|
try std.testing.expectEqual(@as(u32, 32), meta.width);
|
||||||
try std.testing.expectEqual(@as(u32, 32), meta.height);
|
try std.testing.expectEqual(@as(u32, 32), meta.height);
|
||||||
try std.testing.expectEqual(ColorType.rgba, meta.color_type);
|
try std.testing.expectEqual(ColorType.rgba, meta.color_type);
|
||||||
try std.testing.expectEqual(true, meta.has_alpha);
|
try std.testing.expectEqual(true, meta.hasAlpha());
|
||||||
try std.testing.expectEqual(@as(u8, 4), meta.channels);
|
try std.testing.expectEqual(@as(u8, 4), meta.channels());
|
||||||
|
}
|
||||||
|
|
||||||
|
test "paeth predictor" {
|
||||||
|
// Test the Paeth predictor algorithm
|
||||||
|
// p = a + b - c; choose nearest to p among a, b, c
|
||||||
|
try std.testing.expectEqual(@as(u8, 100), paethPredictor(100, 100, 100));
|
||||||
|
// a=50, b=100, c=75: p=75, pa=25, pb=25, pc=0 -> c is nearest
|
||||||
|
try std.testing.expectEqual(@as(u8, 75), paethPredictor(50, 100, 75));
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), paethPredictor(0, 0, 0));
|
||||||
|
// a=10, b=20, c=5: p=25, pa=15, pb=5, pc=20 -> b is nearest
|
||||||
|
try std.testing.expectEqual(@as(u8, 20), paethPredictor(10, 20, 5));
|
||||||
|
}
|
||||||
|
|
||||||
|
test "unfilter none" {
|
||||||
|
const row = [_]u8{ 10, 20, 30, 40 };
|
||||||
|
var out: [4]u8 = undefined;
|
||||||
|
@memcpy(&out, &row);
|
||||||
|
try std.testing.expectEqualSlices(u8, &row, &out);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "unfilter sub" {
|
||||||
|
// Sub filter: each byte is difference from byte bpp positions left
|
||||||
|
const row = [_]u8{ 10, 5, 7, 3 }; // Filtered
|
||||||
|
var out: [4]u8 = undefined;
|
||||||
|
unfilterSub(&out, &row, 1); // bpp = 1
|
||||||
|
// Expected: 10, 10+5=15, 15+7=22, 22+3=25
|
||||||
|
try std.testing.expectEqualSlices(u8, &[_]u8{ 10, 15, 22, 25 }, &out);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "unfilter up" {
|
||||||
|
const prev = [_]u8{ 5, 10, 15, 20 };
|
||||||
|
const row = [_]u8{ 2, 3, 4, 5 }; // Filtered
|
||||||
|
var out: [4]u8 = undefined;
|
||||||
|
unfilterUp(&out, &row, &prev);
|
||||||
|
// Expected: 5+2=7, 10+3=13, 15+4=19, 20+5=25
|
||||||
|
try std.testing.expectEqualSlices(u8, &[_]u8{ 7, 13, 19, 25 }, &out);
|
||||||
}
|
}
|
||||||
|
|
|
||||||
470
src/markdown/markdown.zig
Normal file
470
src/markdown/markdown.zig
Normal file
|
|
@ -0,0 +1,470 @@
|
||||||
|
//! Markdown - Styled text rendering with Markdown-like syntax
|
||||||
|
//!
|
||||||
|
//! Parses a subset of Markdown syntax and renders it to PDF.
|
||||||
|
//!
|
||||||
|
//! Supported syntax:
|
||||||
|
//! - **bold** or __bold__
|
||||||
|
//! - *italic* or _italic_
|
||||||
|
//! - ***bold italic*** or ___bold italic___
|
||||||
|
//! - ~~strikethrough~~
|
||||||
|
//! - [link text](url)
|
||||||
|
//! - # Heading 1
|
||||||
|
//! - ## Heading 2
|
||||||
|
//! - ### Heading 3
|
||||||
|
//! - - list item (bullet)
|
||||||
|
//! - 1. numbered list
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const Font = @import("../fonts/mod.zig").Font;
|
||||||
|
|
||||||
|
/// Style flags for text spans
|
||||||
|
pub const SpanStyle = packed struct {
|
||||||
|
bold: bool = false,
|
||||||
|
italic: bool = false,
|
||||||
|
underline: bool = false,
|
||||||
|
strikethrough: bool = false,
|
||||||
|
|
||||||
|
pub const none: SpanStyle = .{};
|
||||||
|
pub const bold_style: SpanStyle = .{ .bold = true };
|
||||||
|
pub const italic_style: SpanStyle = .{ .italic = true };
|
||||||
|
pub const bold_italic: SpanStyle = .{ .bold = true, .italic = true };
|
||||||
|
};
|
||||||
|
|
||||||
|
/// A span of styled text
|
||||||
|
pub const TextSpan = struct {
|
||||||
|
text: []const u8,
|
||||||
|
style: SpanStyle = .{},
|
||||||
|
url: ?[]const u8 = null, // For links
|
||||||
|
font_size: ?f32 = null, // Override font size (for headings)
|
||||||
|
color: ?u24 = null, // Override color (RGB hex)
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Markdown text renderer
|
||||||
|
pub const MarkdownRenderer = struct {
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
/// Parsed lines
|
||||||
|
lines: std.ArrayListUnmanaged(Line),
|
||||||
|
|
||||||
|
pub const Line = struct {
|
||||||
|
/// Spans for this line (allocated)
|
||||||
|
spans: []TextSpan,
|
||||||
|
line_type: LineType = .paragraph,
|
||||||
|
indent: u8 = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const LineType = enum {
|
||||||
|
paragraph,
|
||||||
|
heading1,
|
||||||
|
heading2,
|
||||||
|
heading3,
|
||||||
|
bullet,
|
||||||
|
numbered,
|
||||||
|
blank,
|
||||||
|
};
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
|
return .{
|
||||||
|
.allocator = allocator,
|
||||||
|
.lines = .{},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
for (self.lines.items) |line| {
|
||||||
|
self.allocator.free(line.spans);
|
||||||
|
}
|
||||||
|
self.lines.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Parse markdown text into styled spans
|
||||||
|
pub fn parse(self: *Self, markdown_text: []const u8) !void {
|
||||||
|
// Split into lines
|
||||||
|
var line_iter = std.mem.splitScalar(u8, markdown_text, '\n');
|
||||||
|
|
||||||
|
while (line_iter.next()) |line| {
|
||||||
|
try self.parseLine(line);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseLine(self: *Self, line: []const u8) !void {
|
||||||
|
const trimmed = std.mem.trim(u8, line, " \t\r");
|
||||||
|
|
||||||
|
// Empty line
|
||||||
|
if (trimmed.len == 0) {
|
||||||
|
const empty_spans = try self.allocator.alloc(TextSpan, 0);
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = empty_spans,
|
||||||
|
.line_type = .blank,
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for headings
|
||||||
|
if (trimmed.len >= 4 and std.mem.startsWith(u8, trimmed, "### ")) {
|
||||||
|
const content = trimmed[4..];
|
||||||
|
const spans = try self.parseInlineStyles(content, .{ .bold = true }, 18);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .heading3,
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (trimmed.len >= 3 and std.mem.startsWith(u8, trimmed, "## ")) {
|
||||||
|
const content = trimmed[3..];
|
||||||
|
const spans = try self.parseInlineStyles(content, .{ .bold = true }, 20);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .heading2,
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (trimmed.len >= 2 and trimmed[0] == '#' and trimmed[1] == ' ') {
|
||||||
|
const content = trimmed[2..];
|
||||||
|
const spans = try self.parseInlineStyles(content, .{ .bold = true }, 24);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .heading1,
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for bullet list
|
||||||
|
if (trimmed.len >= 2 and (trimmed[0] == '-' or trimmed[0] == '*') and trimmed[1] == ' ') {
|
||||||
|
const content = trimmed[2..];
|
||||||
|
const spans = try self.parseInlineStyles(content, .{}, null);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .bullet,
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for numbered list (1. 2. etc.)
|
||||||
|
if (trimmed.len >= 3) {
|
||||||
|
var digit_end: usize = 0;
|
||||||
|
while (digit_end < trimmed.len and std.ascii.isDigit(trimmed[digit_end])) {
|
||||||
|
digit_end += 1;
|
||||||
|
}
|
||||||
|
if (digit_end > 0 and digit_end + 1 < trimmed.len and trimmed[digit_end] == '.' and trimmed[digit_end + 1] == ' ') {
|
||||||
|
const content = trimmed[digit_end + 2 ..];
|
||||||
|
const spans = try self.parseInlineStyles(content, .{}, null);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .numbered,
|
||||||
|
.indent = @intCast(digit_end),
|
||||||
|
});
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Regular paragraph
|
||||||
|
const spans = try self.parseInlineStyles(trimmed, .{}, null);
|
||||||
|
|
||||||
|
try self.lines.append(self.allocator, .{
|
||||||
|
.spans = spans,
|
||||||
|
.line_type = .paragraph,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseInlineStyles(self: *Self, text: []const u8, base_style: SpanStyle, font_size_override: ?f32) ![]TextSpan {
|
||||||
|
var temp_spans = std.ArrayListUnmanaged(TextSpan){};
|
||||||
|
defer temp_spans.deinit(self.allocator);
|
||||||
|
|
||||||
|
var i: usize = 0;
|
||||||
|
var current_start: usize = 0;
|
||||||
|
var current_style = base_style;
|
||||||
|
|
||||||
|
while (i < text.len) {
|
||||||
|
// Check for bold+italic (*** or ___)
|
||||||
|
if (i + 2 < text.len and ((text[i] == '*' and text[i + 1] == '*' and text[i + 2] == '*') or
|
||||||
|
(text[i] == '_' and text[i + 1] == '_' and text[i + 2] == '_')))
|
||||||
|
{
|
||||||
|
// Flush current text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
current_style.bold = !current_style.bold;
|
||||||
|
current_style.italic = !current_style.italic;
|
||||||
|
i += 3;
|
||||||
|
current_start = i;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for bold (** or __)
|
||||||
|
if (i + 1 < text.len and ((text[i] == '*' and text[i + 1] == '*') or
|
||||||
|
(text[i] == '_' and text[i + 1] == '_')))
|
||||||
|
{
|
||||||
|
// Flush current text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
current_style.bold = !current_style.bold;
|
||||||
|
i += 2;
|
||||||
|
current_start = i;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for strikethrough (~~)
|
||||||
|
if (i + 1 < text.len and text[i] == '~' and text[i + 1] == '~') {
|
||||||
|
// Flush current text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
current_style.strikethrough = !current_style.strikethrough;
|
||||||
|
i += 2;
|
||||||
|
current_start = i;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for italic (* or _) - but not if part of ** or __
|
||||||
|
if ((text[i] == '*' or text[i] == '_')) {
|
||||||
|
const next_is_same = i + 1 < text.len and text[i + 1] == text[i];
|
||||||
|
if (!next_is_same) {
|
||||||
|
// Flush current text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
current_style.italic = !current_style.italic;
|
||||||
|
i += 1;
|
||||||
|
current_start = i;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Check for link [text](url)
|
||||||
|
if (text[i] == '[') {
|
||||||
|
// Find closing ]
|
||||||
|
var j = i + 1;
|
||||||
|
while (j < text.len and text[j] != ']') : (j += 1) {}
|
||||||
|
|
||||||
|
if (j + 1 < text.len and text[j] == ']' and text[j + 1] == '(') {
|
||||||
|
// Find closing )
|
||||||
|
var k = j + 2;
|
||||||
|
while (k < text.len and text[k] != ')') : (k += 1) {}
|
||||||
|
|
||||||
|
if (k < text.len and text[k] == ')') {
|
||||||
|
// Flush current text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add link span
|
||||||
|
const link_text = text[i + 1 .. j];
|
||||||
|
const url = text[j + 2 .. k];
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = link_text,
|
||||||
|
.style = .{ .underline = true },
|
||||||
|
.url = url,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
.color = 0x0000FF, // Blue for links
|
||||||
|
});
|
||||||
|
|
||||||
|
i = k + 1;
|
||||||
|
current_start = i;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
i += 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Flush remaining text
|
||||||
|
if (i > current_start) {
|
||||||
|
try temp_spans.append(self.allocator, .{
|
||||||
|
.text = text[current_start..i],
|
||||||
|
.style = current_style,
|
||||||
|
.font_size = font_size_override,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
// Allocate and copy to owned slice
|
||||||
|
const result = try self.allocator.alloc(TextSpan, temp_spans.items.len);
|
||||||
|
@memcpy(result, temp_spans.items);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get font for a given style
|
||||||
|
pub fn fontForStyle(style: SpanStyle) Font {
|
||||||
|
if (style.bold and style.italic) {
|
||||||
|
return .helvetica_bold_oblique;
|
||||||
|
} else if (style.bold) {
|
||||||
|
return .helvetica_bold;
|
||||||
|
} else if (style.italic) {
|
||||||
|
return .helvetica_oblique;
|
||||||
|
}
|
||||||
|
return .helvetica;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Calculate the width of a line in points
|
||||||
|
pub fn lineWidth(line: Line, base_font_size: f32) f32 {
|
||||||
|
var width: f32 = 0;
|
||||||
|
for (line.spans) |span| {
|
||||||
|
const font = fontForStyle(span.style);
|
||||||
|
const font_size = span.font_size orelse base_font_size;
|
||||||
|
width += font.stringWidth(span.text, font_size);
|
||||||
|
}
|
||||||
|
return width;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get the lines
|
||||||
|
pub fn getLines(self: *const Self) []const Line {
|
||||||
|
return self.lines.items;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "MarkdownRenderer init and deinit" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse plain text" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("Hello, world!");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), lines.len);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.paragraph, lines[0].line_type);
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), lines[0].spans.len);
|
||||||
|
try std.testing.expectEqualStrings("Hello, world!", lines[0].spans[0].text);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse bold" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("This is **bold** text");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), lines.len);
|
||||||
|
try std.testing.expectEqual(@as(usize, 3), lines[0].spans.len);
|
||||||
|
|
||||||
|
// "This is "
|
||||||
|
try std.testing.expectEqual(false, lines[0].spans[0].style.bold);
|
||||||
|
|
||||||
|
// "bold"
|
||||||
|
try std.testing.expectEqual(true, lines[0].spans[1].style.bold);
|
||||||
|
try std.testing.expectEqualStrings("bold", lines[0].spans[1].text);
|
||||||
|
|
||||||
|
// " text"
|
||||||
|
try std.testing.expectEqual(false, lines[0].spans[2].style.bold);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse italic" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("This is *italic* text");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), lines.len);
|
||||||
|
try std.testing.expectEqual(@as(usize, 3), lines[0].spans.len);
|
||||||
|
|
||||||
|
try std.testing.expectEqual(true, lines[0].spans[1].style.italic);
|
||||||
|
try std.testing.expectEqualStrings("italic", lines[0].spans[1].text);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse headings" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("# Heading 1\n## Heading 2\n### Heading 3");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 3), lines.len);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.heading1, lines[0].line_type);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.heading2, lines[1].line_type);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.heading3, lines[2].line_type);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse bullet list" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("- Item 1\n- Item 2");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 2), lines.len);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.bullet, lines[0].line_type);
|
||||||
|
try std.testing.expectEqual(MarkdownRenderer.LineType.bullet, lines[1].line_type);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer parse link" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var renderer = MarkdownRenderer.init(allocator);
|
||||||
|
defer renderer.deinit();
|
||||||
|
|
||||||
|
try renderer.parse("Click [here](https://example.com) for more");
|
||||||
|
|
||||||
|
const lines = renderer.getLines();
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), lines.len);
|
||||||
|
try std.testing.expectEqual(@as(usize, 3), lines[0].spans.len);
|
||||||
|
|
||||||
|
// Link span
|
||||||
|
try std.testing.expectEqualStrings("here", lines[0].spans[1].text);
|
||||||
|
try std.testing.expectEqualStrings("https://example.com", lines[0].spans[1].url.?);
|
||||||
|
try std.testing.expectEqual(true, lines[0].spans[1].style.underline);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "MarkdownRenderer fontForStyle" {
|
||||||
|
const bold_font = MarkdownRenderer.fontForStyle(.{ .bold = true });
|
||||||
|
try std.testing.expectEqual(Font.helvetica_bold, bold_font);
|
||||||
|
|
||||||
|
const italic_font = MarkdownRenderer.fontForStyle(.{ .italic = true });
|
||||||
|
try std.testing.expectEqual(Font.helvetica_oblique, italic_font);
|
||||||
|
|
||||||
|
const bold_italic_font = MarkdownRenderer.fontForStyle(.{ .bold = true, .italic = true });
|
||||||
|
try std.testing.expectEqual(Font.helvetica_bold_oblique, bold_italic_font);
|
||||||
|
|
||||||
|
const normal_font = MarkdownRenderer.fontForStyle(.{});
|
||||||
|
try std.testing.expectEqual(Font.helvetica, normal_font);
|
||||||
|
}
|
||||||
9
src/markdown/mod.zig
Normal file
9
src/markdown/mod.zig
Normal file
|
|
@ -0,0 +1,9 @@
|
||||||
|
//! Markdown module - Styled text rendering with Markdown-like syntax
|
||||||
|
//!
|
||||||
|
//! Provides simple text formatting for PDF documents using Markdown-like syntax.
|
||||||
|
//! Supports bold, italic, underline, links, and headings.
|
||||||
|
|
||||||
|
pub const markdown = @import("markdown.zig");
|
||||||
|
pub const MarkdownRenderer = markdown.MarkdownRenderer;
|
||||||
|
pub const TextSpan = markdown.TextSpan;
|
||||||
|
pub const SpanStyle = markdown.SpanStyle;
|
||||||
133
src/outline.zig
Normal file
133
src/outline.zig
Normal file
|
|
@ -0,0 +1,133 @@
|
||||||
|
//! Outline/Bookmarks - PDF document outline (table of contents)
|
||||||
|
//!
|
||||||
|
//! Provides support for PDF bookmarks/outlines that appear in the
|
||||||
|
//! sidebar of PDF readers for easy navigation.
|
||||||
|
//!
|
||||||
|
//! Reference: PDF 1.4 Spec, Section 8.2.2 "Document Outline"
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// A single outline item (bookmark)
|
||||||
|
pub const OutlineItem = struct {
|
||||||
|
/// Display title
|
||||||
|
title: []const u8,
|
||||||
|
/// Target page index (0-based)
|
||||||
|
page: usize,
|
||||||
|
/// Y position on the page (top of view)
|
||||||
|
y: f32 = 0,
|
||||||
|
/// Nesting level (0 = top level)
|
||||||
|
level: u8 = 0,
|
||||||
|
/// Whether the item is initially open (shows children)
|
||||||
|
open: bool = true,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Outline builder for PDF documents
|
||||||
|
pub const Outline = struct {
|
||||||
|
items: std.ArrayListUnmanaged(OutlineItem),
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
|
return .{
|
||||||
|
.items = .{},
|
||||||
|
.allocator = allocator,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
self.items.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Add a top-level bookmark
|
||||||
|
pub fn addBookmark(self: *Self, title: []const u8, page: usize) !void {
|
||||||
|
try self.items.append(self.allocator, .{
|
||||||
|
.title = title,
|
||||||
|
.page = page,
|
||||||
|
.y = 0,
|
||||||
|
.level = 0,
|
||||||
|
.open = true,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Add a bookmark with specific Y position
|
||||||
|
pub fn addBookmarkAt(self: *Self, title: []const u8, page: usize, y: f32) !void {
|
||||||
|
try self.items.append(self.allocator, .{
|
||||||
|
.title = title,
|
||||||
|
.page = page,
|
||||||
|
.y = y,
|
||||||
|
.level = 0,
|
||||||
|
.open = true,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Add a nested bookmark (child of previous item at level-1)
|
||||||
|
pub fn addChild(self: *Self, title: []const u8, page: usize, level: u8) !void {
|
||||||
|
try self.items.append(self.allocator, .{
|
||||||
|
.title = title,
|
||||||
|
.page = page,
|
||||||
|
.y = 0,
|
||||||
|
.level = level,
|
||||||
|
.open = true,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Add a nested bookmark with Y position
|
||||||
|
pub fn addChildAt(self: *Self, title: []const u8, page: usize, y: f32, level: u8) !void {
|
||||||
|
try self.items.append(self.allocator, .{
|
||||||
|
.title = title,
|
||||||
|
.page = page,
|
||||||
|
.y = y,
|
||||||
|
.level = level,
|
||||||
|
.open = true,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get all outline items
|
||||||
|
pub fn getItems(self: *const Self) []const OutlineItem {
|
||||||
|
return self.items.items;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Check if outline is empty
|
||||||
|
pub fn isEmpty(self: *const Self) bool {
|
||||||
|
return self.items.items.len == 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Count total items
|
||||||
|
pub fn count(self: *const Self) usize {
|
||||||
|
return self.items.items.len;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "Outline basic usage" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var outline = Outline.init(allocator);
|
||||||
|
defer outline.deinit();
|
||||||
|
|
||||||
|
try outline.addBookmark("Chapter 1", 0);
|
||||||
|
try outline.addChild("Section 1.1", 0, 1);
|
||||||
|
try outline.addChild("Section 1.2", 1, 1);
|
||||||
|
try outline.addBookmark("Chapter 2", 2);
|
||||||
|
|
||||||
|
try std.testing.expectEqual(@as(usize, 4), outline.count());
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), outline.getItems()[0].level);
|
||||||
|
try std.testing.expectEqual(@as(u8, 1), outline.getItems()[1].level);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Outline with positions" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var outline = Outline.init(allocator);
|
||||||
|
defer outline.deinit();
|
||||||
|
|
||||||
|
try outline.addBookmarkAt("Title", 0, 800);
|
||||||
|
try outline.addChildAt("Subtitle", 0, 700, 1);
|
||||||
|
|
||||||
|
try std.testing.expectEqual(@as(f32, 800), outline.getItems()[0].y);
|
||||||
|
try std.testing.expectEqual(@as(f32, 700), outline.getItems()[1].y);
|
||||||
|
}
|
||||||
|
|
@ -6,3 +6,4 @@ pub const producer = @import("producer.zig");
|
||||||
pub const OutputProducer = producer.OutputProducer;
|
pub const OutputProducer = producer.OutputProducer;
|
||||||
pub const PageData = producer.PageData;
|
pub const PageData = producer.PageData;
|
||||||
pub const DocumentMetadata = producer.DocumentMetadata;
|
pub const DocumentMetadata = producer.DocumentMetadata;
|
||||||
|
pub const CompressionOptions = producer.CompressionOptions;
|
||||||
|
|
|
||||||
|
|
@ -11,6 +11,8 @@ const base = @import("../objects/base.zig");
|
||||||
const Font = @import("../fonts/type1.zig").Font;
|
const Font = @import("../fonts/type1.zig").Font;
|
||||||
const ImageInfo = @import("../images/image_info.zig").ImageInfo;
|
const ImageInfo = @import("../images/image_info.zig").ImageInfo;
|
||||||
const Link = @import("../links.zig").Link;
|
const Link = @import("../links.zig").Link;
|
||||||
|
const zlib = @import("../compression/zlib.zig");
|
||||||
|
const OutlineItem = @import("../outline.zig").OutlineItem;
|
||||||
|
|
||||||
/// Image reference for serialization
|
/// Image reference for serialization
|
||||||
pub const ImageData = struct {
|
pub const ImageData = struct {
|
||||||
|
|
@ -18,6 +20,37 @@ pub const ImageData = struct {
|
||||||
info: *const ImageInfo,
|
info: *const ImageInfo,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
/// Extended graphics state (for transparency)
|
||||||
|
pub const ExtGStateData = struct {
|
||||||
|
fill_opacity: f32,
|
||||||
|
stroke_opacity: f32,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Gradient type
|
||||||
|
pub const GradientType = enum {
|
||||||
|
linear,
|
||||||
|
radial,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Color stop for gradients
|
||||||
|
pub const ColorStopData = struct {
|
||||||
|
position: f32,
|
||||||
|
r: f32,
|
||||||
|
g: f32,
|
||||||
|
b: f32,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Gradient data for PDF output
|
||||||
|
pub const GradientOutputData = struct {
|
||||||
|
gradient_type: GradientType,
|
||||||
|
/// For linear: x0, y0, x1, y1. For radial: x0, y0, r0, x1, y1, r1
|
||||||
|
coords: [6]f32,
|
||||||
|
/// Start color (RGB floats)
|
||||||
|
start_color: [3]f32,
|
||||||
|
/// End color (RGB floats)
|
||||||
|
end_color: [3]f32,
|
||||||
|
};
|
||||||
|
|
||||||
/// Page data ready for serialization
|
/// Page data ready for serialization
|
||||||
pub const PageData = struct {
|
pub const PageData = struct {
|
||||||
width: f32,
|
width: f32,
|
||||||
|
|
@ -26,6 +59,20 @@ pub const PageData = struct {
|
||||||
fonts_used: []const Font,
|
fonts_used: []const Font,
|
||||||
images_used: []const ImageData = &[_]ImageData{},
|
images_used: []const ImageData = &[_]ImageData{},
|
||||||
links: []const Link = &[_]Link{},
|
links: []const Link = &[_]Link{},
|
||||||
|
extgstates: []const ExtGStateData = &[_]ExtGStateData{},
|
||||||
|
gradients: []const GradientOutputData = &[_]GradientOutputData{},
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Compression options for PDF output
|
||||||
|
pub const CompressionOptions = struct {
|
||||||
|
/// Enable stream compression (FlateDecode)
|
||||||
|
enabled: bool = true,
|
||||||
|
/// Compression level (0-12, where 6 is default, 12 is max)
|
||||||
|
level: i32 = 6,
|
||||||
|
/// Minimum size for compression (smaller streams are not worth compressing)
|
||||||
|
min_size: usize = 128,
|
||||||
|
/// Minimum compression ratio to keep compressed version (0.95 = only use if 5%+ smaller)
|
||||||
|
min_ratio: f32 = 0.95,
|
||||||
};
|
};
|
||||||
|
|
||||||
/// Generates a complete PDF document.
|
/// Generates a complete PDF document.
|
||||||
|
|
@ -34,15 +81,21 @@ pub const OutputProducer = struct {
|
||||||
buffer: std.ArrayListUnmanaged(u8),
|
buffer: std.ArrayListUnmanaged(u8),
|
||||||
obj_offsets: std.ArrayListUnmanaged(usize),
|
obj_offsets: std.ArrayListUnmanaged(usize),
|
||||||
current_obj_id: u32,
|
current_obj_id: u32,
|
||||||
|
compression: CompressionOptions,
|
||||||
|
|
||||||
const Self = @This();
|
const Self = @This();
|
||||||
|
|
||||||
pub fn init(allocator: std.mem.Allocator) Self {
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
|
return initWithCompression(allocator, .{});
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn initWithCompression(allocator: std.mem.Allocator, compression: CompressionOptions) Self {
|
||||||
return .{
|
return .{
|
||||||
.allocator = allocator,
|
.allocator = allocator,
|
||||||
.buffer = .{},
|
.buffer = .{},
|
||||||
.obj_offsets = .{},
|
.obj_offsets = .{},
|
||||||
.current_obj_id = 0,
|
.current_obj_id = 0,
|
||||||
|
.compression = compression,
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
@ -53,22 +106,49 @@ pub const OutputProducer = struct {
|
||||||
|
|
||||||
/// Generates a complete PDF from the given pages.
|
/// Generates a complete PDF from the given pages.
|
||||||
pub fn generate(self: *Self, pages: []const PageData, metadata: DocumentMetadata) ![]u8 {
|
pub fn generate(self: *Self, pages: []const PageData, metadata: DocumentMetadata) ![]u8 {
|
||||||
return self.generateWithImages(pages, metadata, &[_]*const ImageInfo{});
|
return self.generateFull(pages, metadata, &[_]*const ImageInfo{}, &[_]OutlineItem{});
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Generates a complete PDF from the given pages with images.
|
/// Generates a complete PDF from the given pages with images.
|
||||||
pub fn generateWithImages(self: *Self, pages: []const PageData, metadata: DocumentMetadata, images: []const *const ImageInfo) ![]u8 {
|
pub fn generateWithImages(self: *Self, pages: []const PageData, metadata: DocumentMetadata, images: []const *const ImageInfo) ![]u8 {
|
||||||
|
return self.generateFull(pages, metadata, images, &[_]OutlineItem{});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Generates a complete PDF with all features.
|
||||||
|
pub fn generateFull(
|
||||||
|
self: *Self,
|
||||||
|
pages: []const PageData,
|
||||||
|
metadata: DocumentMetadata,
|
||||||
|
images: []const *const ImageInfo,
|
||||||
|
outline_items: []const OutlineItem,
|
||||||
|
) ![]u8 {
|
||||||
self.buffer.clearRetainingCapacity();
|
self.buffer.clearRetainingCapacity();
|
||||||
self.obj_offsets.clearRetainingCapacity();
|
self.obj_offsets.clearRetainingCapacity();
|
||||||
self.current_obj_id = 0;
|
self.current_obj_id = 0;
|
||||||
|
|
||||||
|
// Estimate and pre-allocate buffer capacity
|
||||||
|
// Base overhead: ~500 bytes for header/trailer
|
||||||
|
// Per page: ~200 bytes for page object + content size
|
||||||
|
// Per image: ~200 bytes for XObject header + data size
|
||||||
|
var estimated_size: usize = 500;
|
||||||
|
for (pages) |page| {
|
||||||
|
estimated_size += 200 + page.content.len;
|
||||||
|
}
|
||||||
|
for (images) |img| {
|
||||||
|
estimated_size += 200 + img.data.len;
|
||||||
|
if (img.soft_mask) |mask| {
|
||||||
|
estimated_size += 200 + mask.len;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
try self.buffer.ensureTotalCapacity(self.allocator, estimated_size);
|
||||||
|
|
||||||
const writer = self.buffer.writer(self.allocator);
|
const writer = self.buffer.writer(self.allocator);
|
||||||
|
|
||||||
// PDF Header
|
// PDF Header
|
||||||
try writer.writeAll("%PDF-1.4\n");
|
try writer.writeAll("%PDF-1.4\n");
|
||||||
try writer.writeAll("%\xE2\xE3\xCF\xD3\n"); // Binary marker
|
try writer.writeAll("%\xE2\xE3\xCF\xD3\n"); // Binary marker
|
||||||
|
|
||||||
// Collect all unique fonts used
|
// Collect all unique fonts used (max 14 Type1 fonts)
|
||||||
var fonts_set = std.AutoHashMap(Font, void).init(self.allocator);
|
var fonts_set = std.AutoHashMap(Font, void).init(self.allocator);
|
||||||
defer fonts_set.deinit();
|
defer fonts_set.deinit();
|
||||||
for (pages) |page| {
|
for (pages) |page| {
|
||||||
|
|
@ -92,26 +172,49 @@ pub const OutputProducer = struct {
|
||||||
total_links += page.links.len;
|
total_links += page.links.len;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Count images with soft masks (they need extra objects)
|
||||||
|
var soft_mask_count: usize = 0;
|
||||||
|
for (images) |img| {
|
||||||
|
if (img.soft_mask != null) {
|
||||||
|
soft_mask_count += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
// Calculate object IDs:
|
// Calculate object IDs:
|
||||||
// 1 = Catalog
|
// 1 = Catalog
|
||||||
// 2 = Pages (root)
|
// 2 = Pages (root)
|
||||||
// 3 = Info (optional)
|
// 3 = Info (optional)
|
||||||
// 4..4+num_fonts-1 = Font objects
|
// 4 = Outlines root (if any)
|
||||||
// 4+num_fonts..4+num_fonts+num_images-1 = Image XObjects
|
// 5..5+outline_count = Outline items (if any)
|
||||||
|
// next = Font objects
|
||||||
|
// next = Image XObjects
|
||||||
|
// next = Soft mask XObjects (for images with alpha)
|
||||||
// next = Link annotation objects
|
// next = Link annotation objects
|
||||||
// next = Page + Content objects
|
// next = Page + Content objects
|
||||||
const catalog_id: u32 = 1;
|
const catalog_id: u32 = 1;
|
||||||
const pages_root_id: u32 = 2;
|
const pages_root_id: u32 = 2;
|
||||||
const info_id: u32 = 3;
|
const info_id: u32 = 3;
|
||||||
const first_font_id: u32 = 4;
|
const has_outline = outline_items.len > 0;
|
||||||
|
const outline_root_id: u32 = if (has_outline) 4 else 0;
|
||||||
|
const first_outline_item_id: u32 = if (has_outline) 5 else 4;
|
||||||
|
const first_font_id: u32 = first_outline_item_id + @as(u32, @intCast(outline_items.len));
|
||||||
const first_image_id: u32 = first_font_id + @as(u32, @intCast(fonts.len));
|
const first_image_id: u32 = first_font_id + @as(u32, @intCast(fonts.len));
|
||||||
const first_link_id: u32 = first_image_id + @as(u32, @intCast(images.len));
|
const first_soft_mask_id: u32 = first_image_id + @as(u32, @intCast(images.len));
|
||||||
|
const first_link_id: u32 = first_soft_mask_id + @as(u32, @intCast(soft_mask_count));
|
||||||
const first_page_id: u32 = first_link_id + @as(u32, @intCast(total_links));
|
const first_page_id: u32 = first_link_id + @as(u32, @intCast(total_links));
|
||||||
|
|
||||||
|
// Pre-allocate obj_offsets array (each page generates 2 objects: page + content)
|
||||||
|
const total_objects = first_page_id + @as(u32, @intCast(pages.len * 2));
|
||||||
|
try self.obj_offsets.ensureTotalCapacity(self.allocator, total_objects);
|
||||||
|
|
||||||
// Object 1: Catalog
|
// Object 1: Catalog
|
||||||
try self.beginObject(catalog_id);
|
try self.beginObject(catalog_id);
|
||||||
try writer.writeAll("<< /Type /Catalog ");
|
try writer.writeAll("<< /Type /Catalog ");
|
||||||
try writer.print("/Pages {d} 0 R ", .{pages_root_id});
|
try writer.print("/Pages {d} 0 R ", .{pages_root_id});
|
||||||
|
if (has_outline) {
|
||||||
|
try writer.print("/Outlines {d} 0 R ", .{outline_root_id});
|
||||||
|
try writer.writeAll("/PageMode /UseOutlines ");
|
||||||
|
}
|
||||||
try writer.writeAll(">>\n");
|
try writer.writeAll(">>\n");
|
||||||
try self.endObject();
|
try self.endObject();
|
||||||
|
|
||||||
|
|
@ -155,6 +258,51 @@ pub const OutputProducer = struct {
|
||||||
try writer.writeAll(">>\n");
|
try writer.writeAll(">>\n");
|
||||||
try self.endObject();
|
try self.endObject();
|
||||||
|
|
||||||
|
// Outline objects (if any)
|
||||||
|
if (has_outline) {
|
||||||
|
// Outline root dictionary
|
||||||
|
try self.beginObject(outline_root_id);
|
||||||
|
try writer.writeAll("<< /Type /Outlines\n");
|
||||||
|
// First and Last point to first and last top-level items
|
||||||
|
// For simplicity, we'll link all items linearly
|
||||||
|
try writer.print("/First {d} 0 R\n", .{first_outline_item_id});
|
||||||
|
try writer.print("/Last {d} 0 R\n", .{first_outline_item_id + @as(u32, @intCast(outline_items.len - 1))});
|
||||||
|
try writer.print("/Count {d}\n", .{outline_items.len});
|
||||||
|
try writer.writeAll(">>\n");
|
||||||
|
try self.endObject();
|
||||||
|
|
||||||
|
// Individual outline items
|
||||||
|
for (outline_items, 0..) |item, i| {
|
||||||
|
const item_id = first_outline_item_id + @as(u32, @intCast(i));
|
||||||
|
const page_obj_id = first_page_id + @as(u32, @intCast(item.page * 2));
|
||||||
|
|
||||||
|
try self.beginObject(item_id);
|
||||||
|
try writer.writeAll("<<\n");
|
||||||
|
|
||||||
|
// Title
|
||||||
|
try writer.writeAll("/Title ");
|
||||||
|
try base.writeString(writer, item.title);
|
||||||
|
try writer.writeByte('\n');
|
||||||
|
|
||||||
|
// Parent (outline root for all items in simple implementation)
|
||||||
|
try writer.print("/Parent {d} 0 R\n", .{outline_root_id});
|
||||||
|
|
||||||
|
// Prev/Next links
|
||||||
|
if (i > 0) {
|
||||||
|
try writer.print("/Prev {d} 0 R\n", .{item_id - 1});
|
||||||
|
}
|
||||||
|
if (i < outline_items.len - 1) {
|
||||||
|
try writer.print("/Next {d} 0 R\n", .{item_id + 1});
|
||||||
|
}
|
||||||
|
|
||||||
|
// Destination: [page /XYZ left top zoom]
|
||||||
|
try writer.print("/Dest [{d} 0 R /XYZ 0 {d:.2} 0]\n", .{ page_obj_id, item.y });
|
||||||
|
|
||||||
|
try writer.writeAll(">>\n");
|
||||||
|
try self.endObject();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
// Font objects
|
// Font objects
|
||||||
for (fonts, 0..) |font, i| {
|
for (fonts, 0..) |font, i| {
|
||||||
const font_id = first_font_id + @as(u32, @intCast(i));
|
const font_id = first_font_id + @as(u32, @intCast(i));
|
||||||
|
|
@ -169,6 +317,8 @@ pub const OutputProducer = struct {
|
||||||
}
|
}
|
||||||
|
|
||||||
// Image XObject objects
|
// Image XObject objects
|
||||||
|
// First pass: track which images have soft masks
|
||||||
|
var soft_mask_idx: u32 = 0;
|
||||||
for (images, 0..) |img, i| {
|
for (images, 0..) |img, i| {
|
||||||
const img_id = first_image_id + @as(u32, @intCast(i));
|
const img_id = first_image_id + @as(u32, @intCast(i));
|
||||||
try self.beginObject(img_id);
|
try self.beginObject(img_id);
|
||||||
|
|
@ -178,17 +328,9 @@ pub const OutputProducer = struct {
|
||||||
try writer.print("/Height {d}\n", .{img.height});
|
try writer.print("/Height {d}\n", .{img.height});
|
||||||
try writer.print("/ColorSpace /{s}\n", .{img.color_space.pdfName()});
|
try writer.print("/ColorSpace /{s}\n", .{img.color_space.pdfName()});
|
||||||
try writer.print("/BitsPerComponent {d}\n", .{img.bits_per_component});
|
try writer.print("/BitsPerComponent {d}\n", .{img.bits_per_component});
|
||||||
try writer.print("/Filter /{s}\n", .{img.filter.pdfName()});
|
// Only write Filter if there is one (none = raw uncompressed data)
|
||||||
|
if (img.filter.pdfName()) |filter_name| {
|
||||||
// Decode parameters for FlateDecode
|
try writer.print("/Filter /{s}\n", .{filter_name});
|
||||||
if (img.filter == .flate_decode) {
|
|
||||||
try writer.writeAll("/DecodeParms << ");
|
|
||||||
var buf: [128]u8 = undefined;
|
|
||||||
const params = img.decodeParams(&buf);
|
|
||||||
if (params.len > 0) {
|
|
||||||
try writer.writeAll(params);
|
|
||||||
}
|
|
||||||
try writer.writeAll(" >>\n");
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// CMYK inversion
|
// CMYK inversion
|
||||||
|
|
@ -196,6 +338,13 @@ pub const OutputProducer = struct {
|
||||||
try writer.writeAll("/Decode [1 0 1 0 1 0 1 0]\n");
|
try writer.writeAll("/Decode [1 0 1 0 1 0 1 0]\n");
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Soft mask reference (for PNG with alpha)
|
||||||
|
if (img.soft_mask != null) {
|
||||||
|
const mask_obj_id = first_soft_mask_id + soft_mask_idx;
|
||||||
|
try writer.print("/SMask {d} 0 R\n", .{mask_obj_id});
|
||||||
|
soft_mask_idx += 1;
|
||||||
|
}
|
||||||
|
|
||||||
try writer.print("/Length {d}\n", .{img.data.len});
|
try writer.print("/Length {d}\n", .{img.data.len});
|
||||||
try writer.writeAll(">>\n");
|
try writer.writeAll(">>\n");
|
||||||
try writer.writeAll("stream\n");
|
try writer.writeAll("stream\n");
|
||||||
|
|
@ -204,6 +353,32 @@ pub const OutputProducer = struct {
|
||||||
try self.endObject();
|
try self.endObject();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Soft mask XObject objects (grayscale images for alpha channel)
|
||||||
|
soft_mask_idx = 0;
|
||||||
|
for (images) |img| {
|
||||||
|
if (img.soft_mask) |mask_data| {
|
||||||
|
const mask_id = first_soft_mask_id + soft_mask_idx;
|
||||||
|
try self.beginObject(mask_id);
|
||||||
|
try writer.writeAll("<< /Type /XObject\n");
|
||||||
|
try writer.writeAll("/Subtype /Image\n");
|
||||||
|
try writer.print("/Width {d}\n", .{img.width});
|
||||||
|
try writer.print("/Height {d}\n", .{img.height});
|
||||||
|
try writer.writeAll("/ColorSpace /DeviceGray\n");
|
||||||
|
try writer.writeAll("/BitsPerComponent 8\n");
|
||||||
|
// Soft mask uses same filter as main image
|
||||||
|
if (img.filter.pdfName()) |filter_name| {
|
||||||
|
try writer.print("/Filter /{s}\n", .{filter_name});
|
||||||
|
}
|
||||||
|
try writer.print("/Length {d}\n", .{mask_data.len});
|
||||||
|
try writer.writeAll(">>\n");
|
||||||
|
try writer.writeAll("stream\n");
|
||||||
|
try writer.writeAll(mask_data);
|
||||||
|
try writer.writeAll("\nendstream\n");
|
||||||
|
try self.endObject();
|
||||||
|
soft_mask_idx += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
// Link annotation objects
|
// Link annotation objects
|
||||||
var current_link_id = first_link_id;
|
var current_link_id = first_link_id;
|
||||||
for (pages) |page| {
|
for (pages) |page| {
|
||||||
|
|
@ -294,6 +469,58 @@ pub const OutputProducer = struct {
|
||||||
}
|
}
|
||||||
try writer.writeAll(" >>\n");
|
try writer.writeAll(" >>\n");
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// ExtGState resources for transparency
|
||||||
|
if (page.extgstates.len > 0) {
|
||||||
|
try writer.writeAll(" /ExtGState <<\n");
|
||||||
|
for (page.extgstates, 0..) |gs, gs_idx| {
|
||||||
|
try writer.print(" /GS{d} << /Type /ExtGState /ca {d:.3} /CA {d:.3} >>\n", .{
|
||||||
|
gs_idx,
|
||||||
|
gs.fill_opacity,
|
||||||
|
gs.stroke_opacity,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
try writer.writeAll(" >>\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
// Shading resources for gradients
|
||||||
|
if (page.gradients.len > 0) {
|
||||||
|
try writer.writeAll(" /Shading <<\n");
|
||||||
|
for (page.gradients, 0..) |grad, grad_idx| {
|
||||||
|
// Shading type: 2 = axial (linear), 3 = radial
|
||||||
|
const shading_type: u8 = if (grad.gradient_type == .linear) 2 else 3;
|
||||||
|
|
||||||
|
try writer.print(" /Sh{d} <<\n", .{grad_idx});
|
||||||
|
try writer.print(" /ShadingType {d}\n", .{shading_type});
|
||||||
|
try writer.writeAll(" /ColorSpace /DeviceRGB\n");
|
||||||
|
|
||||||
|
if (grad.gradient_type == .linear) {
|
||||||
|
try writer.print(" /Coords [{d:.2} {d:.2} {d:.2} {d:.2}]\n", .{
|
||||||
|
grad.coords[0], grad.coords[1], grad.coords[2], grad.coords[3],
|
||||||
|
});
|
||||||
|
} else {
|
||||||
|
try writer.print(" /Coords [{d:.2} {d:.2} {d:.2} {d:.2} {d:.2} {d:.2}]\n", .{
|
||||||
|
grad.coords[0], grad.coords[1], grad.coords[2],
|
||||||
|
grad.coords[3], grad.coords[4], grad.coords[5],
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
// Function for color interpolation (Type 2 exponential)
|
||||||
|
try writer.writeAll(" /Function <<\n");
|
||||||
|
try writer.writeAll(" /FunctionType 2\n");
|
||||||
|
try writer.writeAll(" /Domain [0 1]\n");
|
||||||
|
try writer.print(" /C0 [{d:.3} {d:.3} {d:.3}]\n", .{
|
||||||
|
grad.start_color[0], grad.start_color[1], grad.start_color[2],
|
||||||
|
});
|
||||||
|
try writer.print(" /C1 [{d:.3} {d:.3} {d:.3}]\n", .{
|
||||||
|
grad.end_color[0], grad.end_color[1], grad.end_color[2],
|
||||||
|
});
|
||||||
|
try writer.writeAll(" /N 1\n");
|
||||||
|
try writer.writeAll(" >>\n");
|
||||||
|
try writer.writeAll(" >>\n");
|
||||||
|
}
|
||||||
|
try writer.writeAll(" >>\n");
|
||||||
|
}
|
||||||
try writer.writeAll(">>\n");
|
try writer.writeAll(">>\n");
|
||||||
|
|
||||||
try writer.writeAll(">>\n");
|
try writer.writeAll(">>\n");
|
||||||
|
|
@ -302,8 +529,50 @@ pub const OutputProducer = struct {
|
||||||
// Track link offset for next page
|
// Track link offset for next page
|
||||||
link_offset += @as(u32, @intCast(page.links.len));
|
link_offset += @as(u32, @intCast(page.links.len));
|
||||||
|
|
||||||
// Content stream
|
// Content stream (with optional compression)
|
||||||
try self.beginObject(content_obj_id);
|
try self.beginObject(content_obj_id);
|
||||||
|
|
||||||
|
// Only attempt compression if enabled and content is large enough
|
||||||
|
const should_try_compress = self.compression.enabled and
|
||||||
|
page.content.len >= self.compression.min_size;
|
||||||
|
|
||||||
|
if (should_try_compress) {
|
||||||
|
// Compress content stream
|
||||||
|
const compressed = zlib.compressDeflateLevel(self.allocator, page.content, self.compression.level) catch {
|
||||||
|
// Fallback to uncompressed if compression fails
|
||||||
|
try writer.print("<< /Length {d} >>\n", .{page.content.len});
|
||||||
|
try writer.writeAll("stream\n");
|
||||||
|
try writer.writeAll(page.content);
|
||||||
|
if (page.content[page.content.len - 1] != '\n') {
|
||||||
|
try writer.writeByte('\n');
|
||||||
|
}
|
||||||
|
try writer.writeAll("endstream\n");
|
||||||
|
try self.endObject();
|
||||||
|
continue;
|
||||||
|
};
|
||||||
|
defer self.allocator.free(compressed);
|
||||||
|
|
||||||
|
// Check if compression is worthwhile (at least min_ratio improvement)
|
||||||
|
const ratio = @as(f32, @floatFromInt(compressed.len)) /
|
||||||
|
@as(f32, @floatFromInt(page.content.len));
|
||||||
|
if (ratio < self.compression.min_ratio) {
|
||||||
|
// Use compressed version
|
||||||
|
try writer.print("<< /Filter /FlateDecode /Length {d} >>\n", .{compressed.len});
|
||||||
|
try writer.writeAll("stream\n");
|
||||||
|
try writer.writeAll(compressed);
|
||||||
|
try writer.writeAll("\nendstream\n");
|
||||||
|
} else {
|
||||||
|
// Compression not worth it, use original
|
||||||
|
try writer.print("<< /Length {d} >>\n", .{page.content.len});
|
||||||
|
try writer.writeAll("stream\n");
|
||||||
|
try writer.writeAll(page.content);
|
||||||
|
if (page.content[page.content.len - 1] != '\n') {
|
||||||
|
try writer.writeByte('\n');
|
||||||
|
}
|
||||||
|
try writer.writeAll("endstream\n");
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Uncompressed content stream
|
||||||
try writer.print("<< /Length {d} >>\n", .{page.content.len});
|
try writer.print("<< /Length {d} >>\n", .{page.content.len});
|
||||||
try writer.writeAll("stream\n");
|
try writer.writeAll("stream\n");
|
||||||
try writer.writeAll(page.content);
|
try writer.writeAll(page.content);
|
||||||
|
|
@ -311,6 +580,7 @@ pub const OutputProducer = struct {
|
||||||
try writer.writeByte('\n');
|
try writer.writeByte('\n');
|
||||||
}
|
}
|
||||||
try writer.writeAll("endstream\n");
|
try writer.writeAll("endstream\n");
|
||||||
|
}
|
||||||
try self.endObject();
|
try self.endObject();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
||||||
502
src/page.zig
502
src/page.zig
|
|
@ -9,10 +9,17 @@ const std = @import("std");
|
||||||
const ContentStream = @import("content_stream.zig").ContentStream;
|
const ContentStream = @import("content_stream.zig").ContentStream;
|
||||||
const RenderStyle = @import("content_stream.zig").RenderStyle;
|
const RenderStyle = @import("content_stream.zig").RenderStyle;
|
||||||
const Color = @import("graphics/color.zig").Color;
|
const Color = @import("graphics/color.zig").Color;
|
||||||
|
const ExtGState = @import("graphics/extgstate.zig").ExtGState;
|
||||||
|
const gradient_mod = @import("graphics/gradient.zig");
|
||||||
|
const LinearGradient = gradient_mod.LinearGradient;
|
||||||
|
const RadialGradient = gradient_mod.RadialGradient;
|
||||||
|
const GradientData = gradient_mod.GradientData;
|
||||||
const Font = @import("fonts/type1.zig").Font;
|
const Font = @import("fonts/type1.zig").Font;
|
||||||
const PageSize = @import("objects/base.zig").PageSize;
|
const PageSize = @import("objects/base.zig").PageSize;
|
||||||
const ImageInfo = @import("images/image_info.zig").ImageInfo;
|
const ImageInfo = @import("images/image_info.zig").ImageInfo;
|
||||||
const Link = @import("links.zig").Link;
|
const Link = @import("links.zig").Link;
|
||||||
|
const Code128 = @import("barcodes/code128.zig").Code128;
|
||||||
|
const QRCode = @import("barcodes/qr.zig").QRCode;
|
||||||
|
|
||||||
/// Text alignment options
|
/// Text alignment options
|
||||||
pub const Align = enum {
|
pub const Align = enum {
|
||||||
|
|
@ -70,6 +77,12 @@ pub const Page = struct {
|
||||||
/// Links on this page (for annotations)
|
/// Links on this page (for annotations)
|
||||||
links: std.ArrayListUnmanaged(Link),
|
links: std.ArrayListUnmanaged(Link),
|
||||||
|
|
||||||
|
/// Extended graphics states used (for transparency/opacity)
|
||||||
|
extgstates: std.ArrayListUnmanaged(ExtGState),
|
||||||
|
|
||||||
|
/// Gradients used on this page
|
||||||
|
gradients: std.ArrayListUnmanaged(GradientData),
|
||||||
|
|
||||||
const Self = @This();
|
const Self = @This();
|
||||||
|
|
||||||
/// Graphics state for the page
|
/// Graphics state for the page
|
||||||
|
|
@ -96,6 +109,10 @@ pub const Page = struct {
|
||||||
top_margin: f32 = 28.35, // 10mm default
|
top_margin: f32 = 28.35, // 10mm default
|
||||||
/// Cell margin (horizontal padding inside cells)
|
/// Cell margin (horizontal padding inside cells)
|
||||||
cell_margin: f32 = 1.0,
|
cell_margin: f32 = 1.0,
|
||||||
|
/// Fill opacity (0.0 = transparent, 1.0 = opaque)
|
||||||
|
fill_opacity: f32 = 1.0,
|
||||||
|
/// Stroke opacity (0.0 = transparent, 1.0 = opaque)
|
||||||
|
stroke_opacity: f32 = 1.0,
|
||||||
};
|
};
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -119,6 +136,8 @@ pub const Page = struct {
|
||||||
.fonts_used = std.AutoHashMap(Font, void).init(allocator),
|
.fonts_used = std.AutoHashMap(Font, void).init(allocator),
|
||||||
.images_used = .{},
|
.images_used = .{},
|
||||||
.links = .{},
|
.links = .{},
|
||||||
|
.extgstates = .{},
|
||||||
|
.gradients = .{},
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
@ -128,6 +147,8 @@ pub const Page = struct {
|
||||||
self.fonts_used.deinit();
|
self.fonts_used.deinit();
|
||||||
self.images_used.deinit(self.allocator);
|
self.images_used.deinit(self.allocator);
|
||||||
self.links.deinit(self.allocator);
|
self.links.deinit(self.allocator);
|
||||||
|
self.extgstates.deinit(self.allocator);
|
||||||
|
self.gradients.deinit(self.allocator);
|
||||||
}
|
}
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -170,6 +191,157 @@ pub const Page = struct {
|
||||||
self.setFillColor(color);
|
self.setFillColor(color);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Opacity / Transparency Operations
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Sets the fill opacity (alpha) for subsequent fill operations.
|
||||||
|
/// 0.0 = fully transparent, 1.0 = fully opaque.
|
||||||
|
pub fn setFillOpacity(self: *Self, opacity: f32) !void {
|
||||||
|
const clamped = std.math.clamp(opacity, 0.0, 1.0);
|
||||||
|
self.state.fill_opacity = clamped;
|
||||||
|
try self.applyOpacity();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Sets the stroke opacity (alpha) for subsequent stroke operations.
|
||||||
|
/// 0.0 = fully transparent, 1.0 = fully opaque.
|
||||||
|
pub fn setStrokeOpacity(self: *Self, opacity: f32) !void {
|
||||||
|
const clamped = std.math.clamp(opacity, 0.0, 1.0);
|
||||||
|
self.state.stroke_opacity = clamped;
|
||||||
|
try self.applyOpacity();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Sets both fill and stroke opacity at once.
|
||||||
|
/// 0.0 = fully transparent, 1.0 = fully opaque.
|
||||||
|
pub fn setOpacity(self: *Self, opacity: f32) !void {
|
||||||
|
const clamped = std.math.clamp(opacity, 0.0, 1.0);
|
||||||
|
self.state.fill_opacity = clamped;
|
||||||
|
self.state.stroke_opacity = clamped;
|
||||||
|
try self.applyOpacity();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Internal: applies the current opacity state by registering/using an ExtGState.
|
||||||
|
fn applyOpacity(self: *Self) !void {
|
||||||
|
// Don't emit ExtGState if fully opaque (default)
|
||||||
|
if (self.state.fill_opacity >= 1.0 and self.state.stroke_opacity >= 1.0) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
const state = ExtGState.init(self.state.fill_opacity, self.state.stroke_opacity);
|
||||||
|
|
||||||
|
// Check if we already have this state registered
|
||||||
|
var state_index: usize = self.extgstates.items.len;
|
||||||
|
for (self.extgstates.items, 0..) |existing, i| {
|
||||||
|
if (existing.eql(&state)) {
|
||||||
|
state_index = i;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// If not found, add it
|
||||||
|
if (state_index == self.extgstates.items.len) {
|
||||||
|
try self.extgstates.append(self.allocator, state);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Write the gs operator to content stream
|
||||||
|
try self.content.writeFmt("/GS{d} gs\n", .{state_index});
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the ExtGStates used on this page.
|
||||||
|
pub fn getExtGStates(self: *const Self) []const ExtGState {
|
||||||
|
return self.extgstates.items;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Gradient Operations
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Fills a rectangle with a linear gradient.
|
||||||
|
pub fn linearGradientRect(self: *Self, x: f32, y: f32, w: f32, h: f32, start_color: Color, end_color: Color, direction: GradientDirection) !void {
|
||||||
|
const grad = switch (direction) {
|
||||||
|
.horizontal => LinearGradient.horizontal(x, y, w, h, start_color, end_color),
|
||||||
|
.vertical => LinearGradient.vertical(x, y, w, h, start_color, end_color),
|
||||||
|
.diagonal => LinearGradient.diagonal(x, y, w, h, start_color, end_color),
|
||||||
|
};
|
||||||
|
|
||||||
|
const grad_idx = self.gradients.items.len;
|
||||||
|
try self.gradients.append(self.allocator, GradientData.fromLinear(grad));
|
||||||
|
|
||||||
|
// Draw rectangle with gradient shading
|
||||||
|
try self.content.saveState();
|
||||||
|
// Clip to rectangle
|
||||||
|
try self.content.rectangle(x, y, w, h);
|
||||||
|
try self.content.clip();
|
||||||
|
try self.content.endPath();
|
||||||
|
// Apply shading
|
||||||
|
try self.content.writeFmt("/Sh{d} sh\n", .{grad_idx});
|
||||||
|
try self.content.restoreState();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Fills a circle with a radial gradient.
|
||||||
|
pub fn radialGradientCircle(self: *Self, cx: f32, cy: f32, radius: f32, center_color: Color, edge_color: Color) !void {
|
||||||
|
const grad = RadialGradient.simple(cx, cy, radius, center_color, edge_color);
|
||||||
|
|
||||||
|
const grad_idx = self.gradients.items.len;
|
||||||
|
try self.gradients.append(self.allocator, GradientData.fromRadial(grad));
|
||||||
|
|
||||||
|
// Draw circle with gradient shading
|
||||||
|
try self.content.saveState();
|
||||||
|
// Clip to circle (using ellipse path)
|
||||||
|
try self.drawEllipsePath(cx, cy, radius, radius);
|
||||||
|
try self.content.clip();
|
||||||
|
try self.content.endPath();
|
||||||
|
// Apply shading
|
||||||
|
try self.content.writeFmt("/Sh{d} sh\n", .{grad_idx});
|
||||||
|
try self.content.restoreState();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Fills an ellipse with a radial gradient.
|
||||||
|
pub fn radialGradientEllipse(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32, center_color: Color, edge_color: Color) !void {
|
||||||
|
// Use the larger radius for the gradient
|
||||||
|
const max_r = @max(rx, ry);
|
||||||
|
const grad = RadialGradient.simple(cx, cy, max_r, center_color, edge_color);
|
||||||
|
|
||||||
|
const grad_idx = self.gradients.items.len;
|
||||||
|
try self.gradients.append(self.allocator, GradientData.fromRadial(grad));
|
||||||
|
|
||||||
|
// Draw ellipse with gradient shading
|
||||||
|
try self.content.saveState();
|
||||||
|
// Clip to ellipse
|
||||||
|
try self.drawEllipsePath(cx, cy, rx, ry);
|
||||||
|
try self.content.clip();
|
||||||
|
try self.content.endPath();
|
||||||
|
// Apply shading
|
||||||
|
try self.content.writeFmt("/Sh{d} sh\n", .{grad_idx});
|
||||||
|
try self.content.restoreState();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws an ellipse path without stroking/filling (for clipping).
|
||||||
|
fn drawEllipsePath(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32) !void {
|
||||||
|
const k: f32 = 0.5522847498;
|
||||||
|
const kx = k * rx;
|
||||||
|
const ky = k * ry;
|
||||||
|
|
||||||
|
try self.content.moveTo(cx + rx, cy);
|
||||||
|
try self.content.curveTo(cx + rx, cy + ky, cx + kx, cy + ry, cx, cy + ry);
|
||||||
|
try self.content.curveTo(cx - kx, cy + ry, cx - rx, cy + ky, cx - rx, cy);
|
||||||
|
try self.content.curveTo(cx - rx, cy - ky, cx - kx, cy - ry, cx, cy - ry);
|
||||||
|
try self.content.curveTo(cx + kx, cy - ry, cx + rx, cy - ky, cx + rx, cy);
|
||||||
|
try self.content.closePath();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the gradients used on this page.
|
||||||
|
pub fn getGradients(self: *const Self) []const GradientData {
|
||||||
|
return self.gradients.items;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Direction for linear gradients
|
||||||
|
pub const GradientDirection = enum {
|
||||||
|
horizontal,
|
||||||
|
vertical,
|
||||||
|
diagonal,
|
||||||
|
};
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
// Line Style Operations
|
// Line Style Operations
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -180,6 +352,91 @@ pub const Page = struct {
|
||||||
try self.content.setLineWidth(width);
|
try self.content.setLineWidth(width);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Graphics State / Transformations
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Saves the current graphics state (colors, line width, transformations).
|
||||||
|
/// Must be paired with a corresponding restoreState() call.
|
||||||
|
pub fn saveState(self: *Self) !void {
|
||||||
|
try self.content.saveState();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Restores the previously saved graphics state.
|
||||||
|
/// Must be paired with a preceding saveState() call.
|
||||||
|
pub fn restoreState(self: *Self) !void {
|
||||||
|
try self.content.restoreState();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a rotation transformation around a point.
|
||||||
|
/// Angle is in degrees, positive is counterclockwise.
|
||||||
|
/// Call saveState() before and restoreState() after to limit the transformation scope.
|
||||||
|
pub fn rotate(self: *Self, angle_deg: f32, cx: f32, cy: f32) !void {
|
||||||
|
const pi = std.math.pi;
|
||||||
|
const angle_rad = angle_deg * pi / 180.0;
|
||||||
|
const cos_a = @cos(angle_rad);
|
||||||
|
const sin_a = @sin(angle_rad);
|
||||||
|
|
||||||
|
// Translate to origin, rotate, translate back
|
||||||
|
// Combined matrix: [cos -sin sin cos cx-cx*cos+cy*sin cy-cx*sin-cy*cos]
|
||||||
|
const e = cx - cx * cos_a + cy * sin_a;
|
||||||
|
const f = cy - cx * sin_a - cy * cos_a;
|
||||||
|
|
||||||
|
try self.content.transform(cos_a, sin_a, -sin_a, cos_a, e, f);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a simple rotation around the origin (0, 0).
|
||||||
|
/// Angle is in degrees, positive is counterclockwise.
|
||||||
|
pub fn rotateAroundOrigin(self: *Self, angle_deg: f32) !void {
|
||||||
|
const pi = std.math.pi;
|
||||||
|
const angle_rad = angle_deg * pi / 180.0;
|
||||||
|
const cos_a = @cos(angle_rad);
|
||||||
|
const sin_a = @sin(angle_rad);
|
||||||
|
|
||||||
|
try self.content.transform(cos_a, sin_a, -sin_a, cos_a, 0, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a scale transformation relative to a point.
|
||||||
|
/// sx, sy are scale factors (1.0 = no change, 2.0 = double size).
|
||||||
|
pub fn scale(self: *Self, sx: f32, sy: f32, cx: f32, cy: f32) !void {
|
||||||
|
// Translate to origin, scale, translate back
|
||||||
|
const e = cx - cx * sx;
|
||||||
|
const f = cy - cy * sy;
|
||||||
|
|
||||||
|
try self.content.transform(sx, 0, 0, sy, e, f);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a scale transformation from the origin.
|
||||||
|
pub fn scaleFromOrigin(self: *Self, sx: f32, sy: f32) !void {
|
||||||
|
try self.content.transform(sx, 0, 0, sy, 0, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a translation (shift) transformation.
|
||||||
|
pub fn translate(self: *Self, tx: f32, ty: f32) !void {
|
||||||
|
try self.content.transform(1, 0, 0, 1, tx, ty);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a skew (shear) transformation.
|
||||||
|
/// Angles are in degrees.
|
||||||
|
/// - skew_x: Skew angle in the X direction (positive tilts right)
|
||||||
|
/// - skew_y: Skew angle in the Y direction (positive tilts up)
|
||||||
|
pub fn skew(self: *Self, skew_x_deg: f32, skew_y_deg: f32) !void {
|
||||||
|
const pi = std.math.pi;
|
||||||
|
const tan_x = @tan(skew_x_deg * pi / 180.0);
|
||||||
|
const tan_y = @tan(skew_y_deg * pi / 180.0);
|
||||||
|
|
||||||
|
try self.content.transform(1, tan_y, tan_x, 1, 0, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applies a custom transformation matrix.
|
||||||
|
/// The matrix is [a b c d e f] representing:
|
||||||
|
/// | a c e |
|
||||||
|
/// | b d f |
|
||||||
|
/// | 0 0 1 |
|
||||||
|
pub fn transform(self: *Self, a: f32, b: f32, c: f32, d: f32, e: f32, f: f32) !void {
|
||||||
|
try self.content.transform(a, b, c, d, e, f);
|
||||||
|
}
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
// Position Operations
|
// Position Operations
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -551,6 +808,154 @@ pub const Page = struct {
|
||||||
try self.content.rect(x, y, w, h, style);
|
try self.content.rect(x, y, w, h, style);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Bezier Curve Operations
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Draws a cubic Bezier curve from (x0, y0) to (x3, y3) using control points.
|
||||||
|
/// The curve starts at (x0, y0), bends toward (x1, y1) and (x2, y2),
|
||||||
|
/// and ends at (x3, y3).
|
||||||
|
pub fn drawBezier(self: *Self, x0: f32, y0: f32, x1: f32, y1: f32, x2: f32, y2: f32, x3: f32, y3: f32) !void {
|
||||||
|
try self.state.stroke_color.writeStrokeColor(&self.content);
|
||||||
|
try self.content.moveTo(x0, y0);
|
||||||
|
try self.content.curveTo(x1, y1, x2, y2, x3, y3);
|
||||||
|
try self.content.stroke();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a quadratic Bezier curve from (x0, y0) to (x2, y2) using one control point.
|
||||||
|
/// Converts to cubic Bezier internally (PDF only supports cubic curves).
|
||||||
|
pub fn drawQuadBezier(self: *Self, x0: f32, y0: f32, x1: f32, y1: f32, x2: f32, y2: f32) !void {
|
||||||
|
// Convert quadratic to cubic: control points are 2/3 of the way from endpoints to the quad control point
|
||||||
|
const cx1 = x0 + 2.0 / 3.0 * (x1 - x0);
|
||||||
|
const cy1 = y0 + 2.0 / 3.0 * (y1 - y0);
|
||||||
|
const cx2 = x2 + 2.0 / 3.0 * (x1 - x2);
|
||||||
|
const cy2 = y2 + 2.0 / 3.0 * (y1 - y2);
|
||||||
|
|
||||||
|
try self.drawBezier(x0, y0, cx1, cy1, cx2, cy2, x2, y2);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws an ellipse at the specified center point.
|
||||||
|
pub fn drawEllipse(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32) !void {
|
||||||
|
try self.ellipse(cx, cy, rx, ry, .stroke);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Fills an ellipse at the specified center point.
|
||||||
|
pub fn fillEllipse(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32) !void {
|
||||||
|
try self.ellipse(cx, cy, rx, ry, .fill);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws an ellipse with the specified style.
|
||||||
|
/// Uses cubic Bezier curves to approximate the ellipse (4 arcs).
|
||||||
|
pub fn ellipse(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32, style: RenderStyle) !void {
|
||||||
|
// Magic number for cubic Bezier approximation of circular arc
|
||||||
|
// k = 4/3 * tan(pi/8) ≈ 0.5522847498
|
||||||
|
const k: f32 = 0.5522847498;
|
||||||
|
const kx = k * rx;
|
||||||
|
const ky = k * ry;
|
||||||
|
|
||||||
|
switch (style) {
|
||||||
|
.stroke => try self.state.stroke_color.writeStrokeColor(&self.content),
|
||||||
|
.fill => try self.state.fill_color.writeFillColor(&self.content),
|
||||||
|
.fill_stroke => {
|
||||||
|
try self.state.fill_color.writeFillColor(&self.content);
|
||||||
|
try self.state.stroke_color.writeStrokeColor(&self.content);
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
// Start at rightmost point
|
||||||
|
try self.content.moveTo(cx + rx, cy);
|
||||||
|
|
||||||
|
// Top-right quadrant (right to top)
|
||||||
|
try self.content.curveTo(cx + rx, cy + ky, cx + kx, cy + ry, cx, cy + ry);
|
||||||
|
// Top-left quadrant (top to left)
|
||||||
|
try self.content.curveTo(cx - kx, cy + ry, cx - rx, cy + ky, cx - rx, cy);
|
||||||
|
// Bottom-left quadrant (left to bottom)
|
||||||
|
try self.content.curveTo(cx - rx, cy - ky, cx - kx, cy - ry, cx, cy - ry);
|
||||||
|
// Bottom-right quadrant (bottom to right)
|
||||||
|
try self.content.curveTo(cx + kx, cy - ry, cx + rx, cy - ky, cx + rx, cy);
|
||||||
|
|
||||||
|
try self.content.closePath();
|
||||||
|
|
||||||
|
switch (style) {
|
||||||
|
.stroke => try self.content.stroke(),
|
||||||
|
.fill => try self.content.fill(),
|
||||||
|
.fill_stroke => try self.content.fillAndStroke(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a circle at the specified center point.
|
||||||
|
pub fn drawCircle(self: *Self, cx: f32, cy: f32, r: f32) !void {
|
||||||
|
try self.ellipse(cx, cy, r, r, .stroke);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Fills a circle at the specified center point.
|
||||||
|
pub fn fillCircle(self: *Self, cx: f32, cy: f32, r: f32) !void {
|
||||||
|
try self.ellipse(cx, cy, r, r, .fill);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a circle with the specified style.
|
||||||
|
pub fn circle(self: *Self, cx: f32, cy: f32, r: f32, style: RenderStyle) !void {
|
||||||
|
try self.ellipse(cx, cy, r, r, style);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws an arc (portion of an ellipse).
|
||||||
|
/// Angles are in degrees, counterclockwise from the positive X axis.
|
||||||
|
pub fn drawArc(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32, start_deg: f32, end_deg: f32) !void {
|
||||||
|
try self.state.stroke_color.writeStrokeColor(&self.content);
|
||||||
|
try self.arcPath(cx, cy, rx, ry, start_deg, end_deg);
|
||||||
|
try self.content.stroke();
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Builds an arc path using cubic Bezier curves.
|
||||||
|
/// Internal function used by drawArc and other arc methods.
|
||||||
|
fn arcPath(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32, start_deg: f32, end_deg: f32) !void {
|
||||||
|
const pi = std.math.pi;
|
||||||
|
const start_rad = start_deg * pi / 180.0;
|
||||||
|
const end_rad = end_deg * pi / 180.0;
|
||||||
|
|
||||||
|
// For large arcs, split into multiple segments (max 90 degrees each)
|
||||||
|
var current = start_rad;
|
||||||
|
var first = true;
|
||||||
|
|
||||||
|
while (current < end_rad) {
|
||||||
|
var segment_end = current + pi / 2.0;
|
||||||
|
if (segment_end > end_rad) segment_end = end_rad;
|
||||||
|
|
||||||
|
try self.arcSegment(cx, cy, rx, ry, current, segment_end, first);
|
||||||
|
first = false;
|
||||||
|
current = segment_end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a single arc segment (up to 90 degrees) using cubic Bezier.
|
||||||
|
fn arcSegment(self: *Self, cx: f32, cy: f32, rx: f32, ry: f32, start_rad: f32, end_rad: f32, move_to: bool) !void {
|
||||||
|
const cos_start = @cos(start_rad);
|
||||||
|
const sin_start = @sin(start_rad);
|
||||||
|
const cos_end = @cos(end_rad);
|
||||||
|
const sin_end = @sin(end_rad);
|
||||||
|
|
||||||
|
// Start and end points
|
||||||
|
const x0 = cx + rx * cos_start;
|
||||||
|
const y0 = cy + ry * sin_start;
|
||||||
|
const x3 = cx + rx * cos_end;
|
||||||
|
const y3 = cy + ry * sin_end;
|
||||||
|
|
||||||
|
// Control point distance factor for cubic Bezier approximation
|
||||||
|
const angle = end_rad - start_rad;
|
||||||
|
const alpha = @sin(angle) * (@sqrt(4.0 + 3.0 * @tan(angle / 2.0) * @tan(angle / 2.0)) - 1.0) / 3.0;
|
||||||
|
|
||||||
|
// Control points
|
||||||
|
const x1 = x0 - alpha * rx * sin_start;
|
||||||
|
const y1 = y0 + alpha * ry * cos_start;
|
||||||
|
const x2 = x3 + alpha * rx * sin_end;
|
||||||
|
const y2 = y3 - alpha * ry * cos_end;
|
||||||
|
|
||||||
|
if (move_to) {
|
||||||
|
try self.content.moveTo(x0, y0);
|
||||||
|
}
|
||||||
|
try self.content.curveTo(x1, y1, x2, y2, x3, y3);
|
||||||
|
}
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
// Image Operations
|
// Image Operations
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -628,13 +1033,13 @@ pub const Page = struct {
|
||||||
const img_w: f32 = @floatFromInt(info.width);
|
const img_w: f32 = @floatFromInt(info.width);
|
||||||
const img_h: f32 = @floatFromInt(info.height);
|
const img_h: f32 = @floatFromInt(info.height);
|
||||||
|
|
||||||
// Calculate scale to fit within box
|
// Calculate scale factor to fit within box
|
||||||
const scale_w = max_w / img_w;
|
const scale_w = max_w / img_w;
|
||||||
const scale_h = max_h / img_h;
|
const scale_h = max_h / img_h;
|
||||||
const scale = @min(scale_w, scale_h);
|
const scale_factor = @min(scale_w, scale_h);
|
||||||
|
|
||||||
const w = img_w * scale;
|
const w = img_w * scale_factor;
|
||||||
const h = img_h * scale;
|
const h = img_h * scale_factor;
|
||||||
|
|
||||||
try self.image(image_index, info, x, y, w, h);
|
try self.image(image_index, info, x, y, w, h);
|
||||||
}
|
}
|
||||||
|
|
@ -760,6 +1165,95 @@ pub const Page = struct {
|
||||||
pub fn getLinks(self: *const Self) []const Link {
|
pub fn getLinks(self: *const Self) []const Link {
|
||||||
return self.links.items;
|
return self.links.items;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Barcode Operations
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Draws a Code128 barcode at the specified position.
|
||||||
|
///
|
||||||
|
/// Parameters:
|
||||||
|
/// - x: X position of barcode (left edge)
|
||||||
|
/// - y: Y position of barcode (bottom edge)
|
||||||
|
/// - text: Text to encode
|
||||||
|
/// - height: Height of the barcode bars
|
||||||
|
/// - module_width: Width of each module (narrow bar unit)
|
||||||
|
pub fn drawCode128(self: *Self, x: f32, y: f32, text: []const u8, height: f32, module_width: f32) !void {
|
||||||
|
const bars = try Code128.encode(self.allocator, text);
|
||||||
|
defer self.allocator.free(bars);
|
||||||
|
|
||||||
|
// Set fill color for bars (black)
|
||||||
|
try self.state.fill_color.writeFillColor(&self.content);
|
||||||
|
|
||||||
|
// Draw each bar
|
||||||
|
var current_x = x;
|
||||||
|
for (bars) |bar| {
|
||||||
|
if (bar == 1) {
|
||||||
|
// Draw black bar
|
||||||
|
try self.content.rect(current_x, y, module_width, height, .fill);
|
||||||
|
}
|
||||||
|
current_x += module_width;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a Code128 barcode with text label below.
|
||||||
|
///
|
||||||
|
/// Parameters:
|
||||||
|
/// - x: X position of barcode (left edge)
|
||||||
|
/// - y: Y position of barcode (bottom of bars, text will be below)
|
||||||
|
/// - text: Text to encode
|
||||||
|
/// - height: Height of the barcode bars
|
||||||
|
/// - module_width: Width of each module
|
||||||
|
/// - show_text: Whether to show the text below the barcode
|
||||||
|
pub fn drawCode128WithText(self: *Self, x: f32, y: f32, text: []const u8, height: f32, module_width: f32, show_text: bool) !void {
|
||||||
|
// Draw barcode
|
||||||
|
try self.drawCode128(x, y, text, height, module_width);
|
||||||
|
|
||||||
|
// Optionally draw text below
|
||||||
|
if (show_text) {
|
||||||
|
const bars = try Code128.encode(self.allocator, text);
|
||||||
|
defer self.allocator.free(bars);
|
||||||
|
|
||||||
|
const barcode_width = @as(f32, @floatFromInt(bars.len)) * module_width;
|
||||||
|
const text_width = self.getStringWidth(text);
|
||||||
|
const text_x = x + (barcode_width - text_width) / 2;
|
||||||
|
const text_y = y - self.state.font_size - 2;
|
||||||
|
|
||||||
|
try self.state.fill_color.writeFillColor(&self.content);
|
||||||
|
try self.content.text(text_x, text_y, self.state.font.pdfName(), self.state.font_size, text);
|
||||||
|
try self.fonts_used.put(self.state.font, {});
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Draws a QR Code at the specified position.
|
||||||
|
///
|
||||||
|
/// Parameters:
|
||||||
|
/// - x: X position of QR code (left edge)
|
||||||
|
/// - y: Y position of QR code (bottom edge)
|
||||||
|
/// - text: Text to encode
|
||||||
|
/// - size: Size of the QR code (width and height)
|
||||||
|
/// - ec: Error correction level (L, M, Q, H)
|
||||||
|
pub fn drawQRCode(self: *Self, x: f32, y: f32, text: []const u8, size: f32, ec: QRCode.ErrorCorrection) !void {
|
||||||
|
var qr = try QRCode.encode(self.allocator, text, ec);
|
||||||
|
defer qr.deinit();
|
||||||
|
|
||||||
|
const module_size = size / @as(f32, @floatFromInt(qr.size));
|
||||||
|
|
||||||
|
// Set fill color for modules (black)
|
||||||
|
try self.state.fill_color.writeFillColor(&self.content);
|
||||||
|
|
||||||
|
// Draw each dark module
|
||||||
|
for (0..qr.size) |row| {
|
||||||
|
for (0..qr.size) |col| {
|
||||||
|
if (qr.get(col, row)) {
|
||||||
|
const mx = x + @as(f32, @floatFromInt(col)) * module_size;
|
||||||
|
// QR code y is top-down, PDF is bottom-up
|
||||||
|
const my = y + size - @as(f32, @floatFromInt(row + 1)) * module_size;
|
||||||
|
try self.content.rect(mx, my, module_size, module_size, .fill);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
// =============================================================================
|
// =============================================================================
|
||||||
|
|
|
||||||
236
src/pdf.zig
236
src/pdf.zig
|
|
@ -10,14 +10,32 @@ const Page = @import("page.zig").Page;
|
||||||
const ContentStream = @import("content_stream.zig").ContentStream;
|
const ContentStream = @import("content_stream.zig").ContentStream;
|
||||||
const Color = @import("graphics/color.zig").Color;
|
const Color = @import("graphics/color.zig").Color;
|
||||||
const Font = @import("fonts/type1.zig").Font;
|
const Font = @import("fonts/type1.zig").Font;
|
||||||
|
const TrueTypeFont = @import("fonts/ttf.zig").TrueTypeFont;
|
||||||
const PageSize = @import("objects/base.zig").PageSize;
|
const PageSize = @import("objects/base.zig").PageSize;
|
||||||
const Orientation = @import("objects/base.zig").Orientation;
|
const Orientation = @import("objects/base.zig").Orientation;
|
||||||
const Unit = @import("objects/base.zig").Unit;
|
const Unit = @import("objects/base.zig").Unit;
|
||||||
const OutputProducer = @import("output/producer.zig").OutputProducer;
|
const OutputProducer = @import("output/producer.zig").OutputProducer;
|
||||||
const PageData = @import("output/producer.zig").PageData;
|
const PageData = @import("output/producer.zig").PageData;
|
||||||
|
const ExtGStateData = @import("output/producer.zig").ExtGStateData;
|
||||||
|
const GradientOutputData = @import("output/producer.zig").GradientOutputData;
|
||||||
|
const producer_GradientType = @import("output/producer.zig").GradientType;
|
||||||
|
const GradientData = @import("graphics/gradient.zig").GradientData;
|
||||||
|
const page_GradientType = @import("graphics/gradient.zig").GradientType;
|
||||||
const DocumentMetadata = @import("output/producer.zig").DocumentMetadata;
|
const DocumentMetadata = @import("output/producer.zig").DocumentMetadata;
|
||||||
|
const CompressionOptions = @import("output/producer.zig").CompressionOptions;
|
||||||
const ImageInfo = @import("images/image_info.zig").ImageInfo;
|
const ImageInfo = @import("images/image_info.zig").ImageInfo;
|
||||||
const jpeg = @import("images/jpeg.zig");
|
const jpeg = @import("images/jpeg.zig");
|
||||||
|
const png = @import("images/png.zig");
|
||||||
|
const images_mod = @import("images/mod.zig");
|
||||||
|
const Outline = @import("outline.zig").Outline;
|
||||||
|
|
||||||
|
/// Configuration constants for zpdf
|
||||||
|
pub const Config = struct {
|
||||||
|
/// Maximum file size for image loading (default: 10MB)
|
||||||
|
pub const max_image_file_size: usize = 10 * 1024 * 1024;
|
||||||
|
/// Maximum decompression buffer size (default: 100MB)
|
||||||
|
pub const max_decompression_size: usize = 100 * 1024 * 1024;
|
||||||
|
};
|
||||||
|
|
||||||
/// A PDF document builder.
|
/// A PDF document builder.
|
||||||
///
|
///
|
||||||
|
|
@ -41,6 +59,15 @@ pub const Pdf = struct {
|
||||||
/// All images in the document
|
/// All images in the document
|
||||||
images: std.ArrayListUnmanaged(ImageInfo),
|
images: std.ArrayListUnmanaged(ImageInfo),
|
||||||
|
|
||||||
|
/// TrueType fonts loaded
|
||||||
|
ttf_fonts: std.ArrayListUnmanaged(TrueTypeFont),
|
||||||
|
|
||||||
|
/// TTF font data (raw bytes, need to keep alive)
|
||||||
|
ttf_data: std.ArrayListUnmanaged([]u8),
|
||||||
|
|
||||||
|
/// Document outline (bookmarks)
|
||||||
|
outline: Outline,
|
||||||
|
|
||||||
/// Document metadata
|
/// Document metadata
|
||||||
title: ?[]const u8 = null,
|
title: ?[]const u8 = null,
|
||||||
author: ?[]const u8 = null,
|
author: ?[]const u8 = null,
|
||||||
|
|
@ -52,6 +79,9 @@ pub const Pdf = struct {
|
||||||
default_orientation: Orientation,
|
default_orientation: Orientation,
|
||||||
unit: Unit,
|
unit: Unit,
|
||||||
|
|
||||||
|
/// Compression settings
|
||||||
|
compression: CompressionOptions,
|
||||||
|
|
||||||
const Self = @This();
|
const Self = @This();
|
||||||
|
|
||||||
/// Options for creating a PDF document.
|
/// Options for creating a PDF document.
|
||||||
|
|
@ -62,6 +92,8 @@ pub const Pdf = struct {
|
||||||
orientation: Orientation = .portrait,
|
orientation: Orientation = .portrait,
|
||||||
/// Unit of measurement for user coordinates
|
/// Unit of measurement for user coordinates
|
||||||
unit: Unit = .pt,
|
unit: Unit = .pt,
|
||||||
|
/// Compression options for PDF streams
|
||||||
|
compression: CompressionOptions = .{},
|
||||||
};
|
};
|
||||||
|
|
||||||
/// Options for adding a page.
|
/// Options for adding a page.
|
||||||
|
|
@ -82,12 +114,31 @@ pub const Pdf = struct {
|
||||||
.allocator = allocator,
|
.allocator = allocator,
|
||||||
.pages = .{},
|
.pages = .{},
|
||||||
.images = .{},
|
.images = .{},
|
||||||
|
.ttf_fonts = .{},
|
||||||
|
.ttf_data = .{},
|
||||||
|
.outline = Outline.init(allocator),
|
||||||
.default_page_size = options.page_size,
|
.default_page_size = options.page_size,
|
||||||
.default_orientation = options.orientation,
|
.default_orientation = options.orientation,
|
||||||
.unit = options.unit,
|
.unit = options.unit,
|
||||||
|
.compression = options.compression,
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/// Sets the compression level (0-12, where 0=disabled, 6=default, 12=max).
|
||||||
|
pub fn setCompressionLevel(self: *Self, level: i32) void {
|
||||||
|
if (level <= 0) {
|
||||||
|
self.compression.enabled = false;
|
||||||
|
} else {
|
||||||
|
self.compression.enabled = true;
|
||||||
|
self.compression.level = @min(level, 12);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Enables or disables stream compression.
|
||||||
|
pub fn setCompression(self: *Self, enabled: bool) void {
|
||||||
|
self.compression.enabled = enabled;
|
||||||
|
}
|
||||||
|
|
||||||
/// Frees all resources.
|
/// Frees all resources.
|
||||||
pub fn deinit(self: *Self) void {
|
pub fn deinit(self: *Self) void {
|
||||||
for (self.pages.items) |*page| {
|
for (self.pages.items) |*page| {
|
||||||
|
|
@ -100,6 +151,20 @@ pub const Pdf = struct {
|
||||||
img.deinit(self.allocator);
|
img.deinit(self.allocator);
|
||||||
}
|
}
|
||||||
self.images.deinit(self.allocator);
|
self.images.deinit(self.allocator);
|
||||||
|
|
||||||
|
// Free TTF fonts
|
||||||
|
for (self.ttf_fonts.items) |*font| {
|
||||||
|
font.deinit();
|
||||||
|
}
|
||||||
|
self.ttf_fonts.deinit(self.allocator);
|
||||||
|
|
||||||
|
// Free TTF raw data
|
||||||
|
for (self.ttf_data.items) |data| {
|
||||||
|
self.allocator.free(data);
|
||||||
|
}
|
||||||
|
self.ttf_data.deinit(self.allocator);
|
||||||
|
|
||||||
|
self.outline.deinit();
|
||||||
}
|
}
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -184,7 +249,7 @@ pub const Pdf = struct {
|
||||||
const file = try std.fs.cwd().openFile(path, .{});
|
const file = try std.fs.cwd().openFile(path, .{});
|
||||||
defer file.close();
|
defer file.close();
|
||||||
|
|
||||||
const data = try file.readToEndAlloc(self.allocator, 10 * 1024 * 1024); // 10MB max
|
const data = try file.readToEndAlloc(self.allocator, Config.max_image_file_size);
|
||||||
|
|
||||||
var info = try jpeg.parse(data);
|
var info = try jpeg.parse(data);
|
||||||
// Mark as owned since we allocated the data
|
// Mark as owned since we allocated the data
|
||||||
|
|
@ -195,6 +260,57 @@ pub const Pdf = struct {
|
||||||
return self.images.items.len - 1;
|
return self.images.items.len - 1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/// Adds a PNG image from raw data and returns its index.
|
||||||
|
/// Supports PNG with alpha channel (transparency).
|
||||||
|
pub fn addPngImage(self: *Self, png_data: []const u8) !usize {
|
||||||
|
const info = try png.parse(self.allocator, png_data);
|
||||||
|
try self.images.append(self.allocator, info);
|
||||||
|
return self.images.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds a PNG image from a file and returns its index.
|
||||||
|
/// Supports PNG with alpha channel (transparency).
|
||||||
|
pub fn addPngImageFromFile(self: *Self, path: []const u8) !usize {
|
||||||
|
const file = try std.fs.cwd().openFile(path, .{});
|
||||||
|
defer file.close();
|
||||||
|
|
||||||
|
const data = try file.readToEndAlloc(self.allocator, Config.max_image_file_size);
|
||||||
|
defer self.allocator.free(data);
|
||||||
|
|
||||||
|
const info = try png.parse(self.allocator, data);
|
||||||
|
try self.images.append(self.allocator, info);
|
||||||
|
return self.images.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds an image from file, auto-detecting format (JPEG or PNG).
|
||||||
|
pub fn addImageFromFile(self: *Self, path: []const u8) !usize {
|
||||||
|
const file = try std.fs.cwd().openFile(path, .{});
|
||||||
|
defer file.close();
|
||||||
|
|
||||||
|
const data = try file.readToEndAlloc(self.allocator, Config.max_image_file_size);
|
||||||
|
|
||||||
|
const format = images_mod.detectFormat(data) orelse {
|
||||||
|
self.allocator.free(data);
|
||||||
|
return error.UnsupportedImageFormat;
|
||||||
|
};
|
||||||
|
|
||||||
|
switch (format) {
|
||||||
|
.jpeg => {
|
||||||
|
var info = try jpeg.parse(data);
|
||||||
|
info.data = data;
|
||||||
|
info.owns_data = true;
|
||||||
|
try self.images.append(self.allocator, info);
|
||||||
|
},
|
||||||
|
.png => {
|
||||||
|
defer self.allocator.free(data);
|
||||||
|
const info = try png.parse(self.allocator, data);
|
||||||
|
try self.images.append(self.allocator, info);
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
return self.images.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
/// Returns the ImageInfo for an image by index.
|
/// Returns the ImageInfo for an image by index.
|
||||||
pub fn getImage(self: *const Self, index: usize) ?*const ImageInfo {
|
pub fn getImage(self: *const Self, index: usize) ?*const ImageInfo {
|
||||||
if (index < self.images.items.len) {
|
if (index < self.images.items.len) {
|
||||||
|
|
@ -208,6 +324,73 @@ pub const Pdf = struct {
|
||||||
return self.images.items.len;
|
return self.images.items.len;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// TrueType Font Management
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Adds a TrueType font from raw data and returns its index.
|
||||||
|
/// The font can then be used with page.setTtfFont(index, size).
|
||||||
|
pub fn addTtfFont(self: *Self, ttf_data: []const u8) !usize {
|
||||||
|
const font = try TrueTypeFont.parse(self.allocator, ttf_data);
|
||||||
|
try self.ttf_fonts.append(self.allocator, font);
|
||||||
|
return self.ttf_fonts.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds a TrueType font from a file and returns its index.
|
||||||
|
pub fn addTtfFontFromFile(self: *Self, path: []const u8) !usize {
|
||||||
|
const file = try std.fs.cwd().openFile(path, .{});
|
||||||
|
defer file.close();
|
||||||
|
|
||||||
|
const data = try file.readToEndAlloc(self.allocator, Config.max_image_file_size);
|
||||||
|
try self.ttf_data.append(self.allocator, data);
|
||||||
|
|
||||||
|
const font = try TrueTypeFont.parse(self.allocator, data);
|
||||||
|
try self.ttf_fonts.append(self.allocator, font);
|
||||||
|
return self.ttf_fonts.items.len - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the TrueTypeFont for a font by index.
|
||||||
|
pub fn getTtfFont(self: *const Self, index: usize) ?*const TrueTypeFont {
|
||||||
|
if (index < self.ttf_fonts.items.len) {
|
||||||
|
return &self.ttf_fonts.items[index];
|
||||||
|
}
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the number of TTF fonts loaded.
|
||||||
|
pub fn ttfFontCount(self: *const Self) usize {
|
||||||
|
return self.ttf_fonts.items.len;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// Bookmarks / Outline
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Adds a top-level bookmark pointing to a page.
|
||||||
|
pub fn addBookmark(self: *Self, title: []const u8, page: usize) !void {
|
||||||
|
try self.outline.addBookmark(title, page);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds a bookmark with a specific Y position on the page.
|
||||||
|
pub fn addBookmarkAt(self: *Self, title: []const u8, page: usize, y: f32) !void {
|
||||||
|
try self.outline.addBookmarkAt(title, page, y);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds a nested bookmark (child).
|
||||||
|
pub fn addBookmarkChild(self: *Self, title: []const u8, page: usize, level: u8) !void {
|
||||||
|
try self.outline.addChild(title, page, level);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Adds a nested bookmark with Y position.
|
||||||
|
pub fn addBookmarkChildAt(self: *Self, title: []const u8, page: usize, y: f32, level: u8) !void {
|
||||||
|
try self.outline.addChildAt(title, page, y, level);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Returns the number of bookmarks.
|
||||||
|
pub fn bookmarkCount(self: *const Self) usize {
|
||||||
|
return self.outline.count();
|
||||||
|
}
|
||||||
|
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
// Output
|
// Output
|
||||||
// =========================================================================
|
// =========================================================================
|
||||||
|
|
@ -218,13 +401,23 @@ pub const Pdf = struct {
|
||||||
var page_data: std.ArrayListUnmanaged(PageData) = .{};
|
var page_data: std.ArrayListUnmanaged(PageData) = .{};
|
||||||
defer page_data.deinit(self.allocator);
|
defer page_data.deinit(self.allocator);
|
||||||
|
|
||||||
// Keep track of all font slices to free them after generation
|
// Keep track of all slices to free them after generation
|
||||||
var font_slices: std.ArrayListUnmanaged([]Font) = .{};
|
var font_slices: std.ArrayListUnmanaged([]Font) = .{};
|
||||||
|
var extgstate_slices: std.ArrayListUnmanaged([]ExtGStateData) = .{};
|
||||||
|
var gradient_slices: std.ArrayListUnmanaged([]GradientOutputData) = .{};
|
||||||
defer {
|
defer {
|
||||||
for (font_slices.items) |slice| {
|
for (font_slices.items) |slice| {
|
||||||
self.allocator.free(slice);
|
self.allocator.free(slice);
|
||||||
}
|
}
|
||||||
font_slices.deinit(self.allocator);
|
font_slices.deinit(self.allocator);
|
||||||
|
for (extgstate_slices.items) |slice| {
|
||||||
|
self.allocator.free(slice);
|
||||||
|
}
|
||||||
|
extgstate_slices.deinit(self.allocator);
|
||||||
|
for (gradient_slices.items) |slice| {
|
||||||
|
self.allocator.free(slice);
|
||||||
|
}
|
||||||
|
gradient_slices.deinit(self.allocator);
|
||||||
}
|
}
|
||||||
|
|
||||||
for (self.pages.items) |*page| {
|
for (self.pages.items) |*page| {
|
||||||
|
|
@ -237,12 +430,45 @@ pub const Pdf = struct {
|
||||||
const fonts_slice = try fonts.toOwnedSlice(self.allocator);
|
const fonts_slice = try fonts.toOwnedSlice(self.allocator);
|
||||||
try font_slices.append(self.allocator, fonts_slice);
|
try font_slices.append(self.allocator, fonts_slice);
|
||||||
|
|
||||||
|
// Get ExtGStates used - convert to owned slice
|
||||||
|
var extgstates: std.ArrayListUnmanaged(ExtGStateData) = .{};
|
||||||
|
for (page.getExtGStates()) |gs| {
|
||||||
|
try extgstates.append(self.allocator, .{
|
||||||
|
.fill_opacity = gs.fill_opacity,
|
||||||
|
.stroke_opacity = gs.stroke_opacity,
|
||||||
|
});
|
||||||
|
}
|
||||||
|
const extgstates_slice = try extgstates.toOwnedSlice(self.allocator);
|
||||||
|
try extgstate_slices.append(self.allocator, extgstates_slice);
|
||||||
|
|
||||||
|
// Get Gradients used - convert to output format
|
||||||
|
var gradients: std.ArrayListUnmanaged(GradientOutputData) = .{};
|
||||||
|
for (page.getGradients()) |grad| {
|
||||||
|
// Convert GradientData to GradientOutputData
|
||||||
|
const start_color = grad.start_color.toRgbFloats();
|
||||||
|
const end_color = grad.end_color.toRgbFloats();
|
||||||
|
|
||||||
|
try gradients.append(self.allocator, .{
|
||||||
|
.gradient_type = if (grad.gradient_type == page_GradientType.linear)
|
||||||
|
producer_GradientType.linear
|
||||||
|
else
|
||||||
|
producer_GradientType.radial,
|
||||||
|
.coords = grad.coords,
|
||||||
|
.start_color = .{ start_color.r, start_color.g, start_color.b },
|
||||||
|
.end_color = .{ end_color.r, end_color.g, end_color.b },
|
||||||
|
});
|
||||||
|
}
|
||||||
|
const gradients_slice = try gradients.toOwnedSlice(self.allocator);
|
||||||
|
try gradient_slices.append(self.allocator, gradients_slice);
|
||||||
|
|
||||||
try page_data.append(self.allocator, .{
|
try page_data.append(self.allocator, .{
|
||||||
.width = page.width,
|
.width = page.width,
|
||||||
.height = page.height,
|
.height = page.height,
|
||||||
.content = page.getContent(),
|
.content = page.getContent(),
|
||||||
.fonts_used = fonts_slice,
|
.fonts_used = fonts_slice,
|
||||||
.links = page.getLinks(),
|
.links = page.getLinks(),
|
||||||
|
.extgstates = extgstates_slice,
|
||||||
|
.gradients = gradients_slice,
|
||||||
});
|
});
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
@ -255,15 +481,15 @@ pub const Pdf = struct {
|
||||||
}
|
}
|
||||||
|
|
||||||
// Generate PDF
|
// Generate PDF
|
||||||
var producer = OutputProducer.init(self.allocator);
|
var producer = OutputProducer.initWithCompression(self.allocator, self.compression);
|
||||||
defer producer.deinit();
|
defer producer.deinit();
|
||||||
|
|
||||||
return try producer.generateWithImages(page_data.items, .{
|
return try producer.generateFull(page_data.items, .{
|
||||||
.title = self.title,
|
.title = self.title,
|
||||||
.author = self.author,
|
.author = self.author,
|
||||||
.subject = self.subject,
|
.subject = self.subject,
|
||||||
.creator = self.creator,
|
.creator = self.creator,
|
||||||
}, image_ptrs.items);
|
}, image_ptrs.items, self.outline.getItems());
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Saves the document to a file.
|
/// Saves the document to a file.
|
||||||
|
|
|
||||||
74
src/root.zig
74
src/root.zig
|
|
@ -29,6 +29,7 @@ const std = @import("std");
|
||||||
/// Main PDF document facade
|
/// Main PDF document facade
|
||||||
pub const pdf = @import("pdf.zig");
|
pub const pdf = @import("pdf.zig");
|
||||||
pub const Pdf = pdf.Pdf;
|
pub const Pdf = pdf.Pdf;
|
||||||
|
pub const Config = pdf.Config;
|
||||||
|
|
||||||
/// Page representation
|
/// Page representation
|
||||||
pub const page = @import("page.zig");
|
pub const page = @import("page.zig");
|
||||||
|
|
@ -45,15 +46,22 @@ pub const LineCap = content_stream.LineCap;
|
||||||
pub const LineJoin = content_stream.LineJoin;
|
pub const LineJoin = content_stream.LineJoin;
|
||||||
pub const TextRenderMode = content_stream.TextRenderMode;
|
pub const TextRenderMode = content_stream.TextRenderMode;
|
||||||
|
|
||||||
/// Graphics (colors, etc.)
|
/// Graphics (colors, transparency, gradients)
|
||||||
pub const graphics = @import("graphics/mod.zig");
|
pub const graphics = @import("graphics/mod.zig");
|
||||||
pub const Color = graphics.Color;
|
pub const Color = graphics.Color;
|
||||||
|
pub const ExtGState = graphics.ExtGState;
|
||||||
|
pub const Gradient = graphics.Gradient;
|
||||||
|
pub const LinearGradient = graphics.LinearGradient;
|
||||||
|
pub const RadialGradient = graphics.RadialGradient;
|
||||||
|
pub const ColorStop = graphics.ColorStop;
|
||||||
|
pub const GradientDirection = page.Page.GradientDirection;
|
||||||
|
|
||||||
/// Fonts
|
/// Fonts
|
||||||
pub const fonts = @import("fonts/mod.zig");
|
pub const fonts = @import("fonts/mod.zig");
|
||||||
pub const Font = fonts.Font;
|
pub const Font = fonts.Font;
|
||||||
pub const FontFamily = fonts.FontFamily;
|
pub const FontFamily = fonts.FontFamily;
|
||||||
pub const FontState = fonts.FontState;
|
pub const FontState = fonts.FontState;
|
||||||
|
pub const TrueTypeFont = fonts.TrueTypeFont;
|
||||||
|
|
||||||
/// Objects (base types, page sizes, units)
|
/// Objects (base types, page sizes, units)
|
||||||
pub const objects = @import("objects/mod.zig");
|
pub const objects = @import("objects/mod.zig");
|
||||||
|
|
@ -64,12 +72,16 @@ pub const Unit = objects.Unit;
|
||||||
/// Output (PDF generation)
|
/// Output (PDF generation)
|
||||||
pub const output = @import("output/mod.zig");
|
pub const output = @import("output/mod.zig");
|
||||||
pub const OutputProducer = output.OutputProducer;
|
pub const OutputProducer = output.OutputProducer;
|
||||||
|
pub const CompressionOptions = output.CompressionOptions;
|
||||||
|
|
||||||
/// Images (JPEG, PNG)
|
/// Images (JPEG, PNG)
|
||||||
pub const images = @import("images/mod.zig");
|
pub const images = @import("images/mod.zig");
|
||||||
pub const ImageInfo = images.ImageInfo;
|
pub const ImageInfo = images.ImageInfo;
|
||||||
pub const ImageFormat = images.ImageFormat;
|
pub const ImageFormat = images.ImageFormat;
|
||||||
|
|
||||||
|
/// Compression (zlib/deflate)
|
||||||
|
pub const compression = @import("compression/mod.zig");
|
||||||
|
|
||||||
/// Table helper
|
/// Table helper
|
||||||
pub const table = @import("table.zig");
|
pub const table = @import("table.zig");
|
||||||
pub const Table = table.Table;
|
pub const Table = table.Table;
|
||||||
|
|
@ -89,6 +101,46 @@ pub const links = @import("links.zig");
|
||||||
pub const Link = links.Link;
|
pub const Link = links.Link;
|
||||||
pub const PageLinks = links.PageLinks;
|
pub const PageLinks = links.PageLinks;
|
||||||
|
|
||||||
|
/// Outline/Bookmarks
|
||||||
|
pub const outline_mod = @import("outline.zig");
|
||||||
|
pub const Outline = outline_mod.Outline;
|
||||||
|
pub const OutlineItem = outline_mod.OutlineItem;
|
||||||
|
|
||||||
|
/// Barcodes (Code128, QR)
|
||||||
|
pub const barcodes = @import("barcodes/mod.zig");
|
||||||
|
pub const Code128 = barcodes.Code128;
|
||||||
|
pub const QRCode = barcodes.QRCode;
|
||||||
|
|
||||||
|
/// Security (Encryption)
|
||||||
|
pub const security = @import("security/mod.zig");
|
||||||
|
pub const Encryption = security.Encryption;
|
||||||
|
pub const EncryptionOptions = security.EncryptionOptions;
|
||||||
|
pub const Permissions = security.Permissions;
|
||||||
|
|
||||||
|
/// Forms (AcroForms)
|
||||||
|
pub const forms = @import("forms/mod.zig");
|
||||||
|
pub const TextField = forms.TextField;
|
||||||
|
pub const CheckBox = forms.CheckBox;
|
||||||
|
pub const FieldFlags = forms.FieldFlags;
|
||||||
|
pub const FormField = forms.FormField;
|
||||||
|
|
||||||
|
/// SVG Import
|
||||||
|
pub const svg = @import("svg/mod.zig");
|
||||||
|
pub const SvgParser = svg.SvgParser;
|
||||||
|
pub const SvgElement = svg.SvgElement;
|
||||||
|
|
||||||
|
/// Templates (reusable layouts)
|
||||||
|
pub const template = @import("template/mod.zig");
|
||||||
|
pub const Template = template.Template;
|
||||||
|
pub const TemplateRegion = template.TemplateRegion;
|
||||||
|
pub const RegionType = template.RegionType;
|
||||||
|
|
||||||
|
/// Markdown styling
|
||||||
|
pub const markdown = @import("markdown/mod.zig");
|
||||||
|
pub const MarkdownRenderer = markdown.MarkdownRenderer;
|
||||||
|
pub const TextSpan = markdown.TextSpan;
|
||||||
|
pub const SpanStyle = markdown.SpanStyle;
|
||||||
|
|
||||||
// =============================================================================
|
// =============================================================================
|
||||||
// Backwards Compatibility - Old API (Document)
|
// Backwards Compatibility - Old API (Document)
|
||||||
// =============================================================================
|
// =============================================================================
|
||||||
|
|
@ -244,14 +296,34 @@ comptime {
|
||||||
_ = @import("page.zig");
|
_ = @import("page.zig");
|
||||||
_ = @import("pdf.zig");
|
_ = @import("pdf.zig");
|
||||||
_ = @import("graphics/color.zig");
|
_ = @import("graphics/color.zig");
|
||||||
|
_ = @import("graphics/extgstate.zig");
|
||||||
|
_ = @import("graphics/gradient.zig");
|
||||||
|
_ = @import("barcodes/mod.zig");
|
||||||
|
_ = @import("barcodes/code128.zig");
|
||||||
|
_ = @import("barcodes/qr.zig");
|
||||||
_ = @import("fonts/type1.zig");
|
_ = @import("fonts/type1.zig");
|
||||||
|
_ = @import("fonts/ttf.zig");
|
||||||
_ = @import("objects/base.zig");
|
_ = @import("objects/base.zig");
|
||||||
_ = @import("output/producer.zig");
|
_ = @import("output/producer.zig");
|
||||||
_ = @import("images/mod.zig");
|
_ = @import("images/mod.zig");
|
||||||
_ = @import("images/image_info.zig");
|
_ = @import("images/image_info.zig");
|
||||||
_ = @import("images/jpeg.zig");
|
_ = @import("images/jpeg.zig");
|
||||||
_ = @import("images/png.zig");
|
_ = @import("images/png.zig");
|
||||||
|
_ = @import("compression/mod.zig");
|
||||||
|
_ = @import("compression/zlib.zig");
|
||||||
_ = @import("table.zig");
|
_ = @import("table.zig");
|
||||||
_ = @import("pagination.zig");
|
_ = @import("pagination.zig");
|
||||||
_ = @import("links.zig");
|
_ = @import("links.zig");
|
||||||
|
_ = @import("outline.zig");
|
||||||
|
_ = @import("security/mod.zig");
|
||||||
|
_ = @import("security/rc4.zig");
|
||||||
|
_ = @import("security/encryption.zig");
|
||||||
|
_ = @import("forms/mod.zig");
|
||||||
|
_ = @import("forms/field.zig");
|
||||||
|
_ = @import("svg/mod.zig");
|
||||||
|
_ = @import("svg/parser.zig");
|
||||||
|
_ = @import("template/mod.zig");
|
||||||
|
_ = @import("template/template.zig");
|
||||||
|
_ = @import("markdown/mod.zig");
|
||||||
|
_ = @import("markdown/markdown.zig");
|
||||||
}
|
}
|
||||||
|
|
|
||||||
373
src/security/encryption.zig
Normal file
373
src/security/encryption.zig
Normal file
|
|
@ -0,0 +1,373 @@
|
||||||
|
//! PDF Encryption
|
||||||
|
//!
|
||||||
|
//! Implements PDF 1.4 encryption (Standard Security Handler).
|
||||||
|
//! Supports user/owner passwords and permission flags.
|
||||||
|
//!
|
||||||
|
//! Reference: PDF 1.4 Spec, Section 3.5 "Encryption"
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
const RC4 = @import("rc4.zig").RC4;
|
||||||
|
|
||||||
|
/// PDF encryption handler
|
||||||
|
pub const Encryption = struct {
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
/// Encryption key (5 or 16 bytes)
|
||||||
|
key: []u8,
|
||||||
|
key_length: u8, // 5 (40-bit) or 16 (128-bit)
|
||||||
|
|
||||||
|
/// Owner and user password hashes
|
||||||
|
owner_hash: [32]u8,
|
||||||
|
user_hash: [32]u8,
|
||||||
|
|
||||||
|
/// Permission flags
|
||||||
|
permissions: Permissions,
|
||||||
|
|
||||||
|
/// Document ID (first element)
|
||||||
|
document_id: []u8,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
/// PDF padding string (32 bytes)
|
||||||
|
const PDF_PADDING = [_]u8{
|
||||||
|
0x28, 0xBF, 0x4E, 0x5E, 0x4E, 0x75, 0x8A, 0x41,
|
||||||
|
0x64, 0x00, 0x4E, 0x56, 0xFF, 0xFA, 0x01, 0x08,
|
||||||
|
0x2E, 0x2E, 0x00, 0xB6, 0xD0, 0x68, 0x3E, 0x80,
|
||||||
|
0x2F, 0x0C, 0xA9, 0xFE, 0x64, 0x53, 0x69, 0x7A,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Initialize encryption with passwords
|
||||||
|
pub fn init(
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
user_password: []const u8,
|
||||||
|
owner_password: []const u8,
|
||||||
|
permissions: Permissions,
|
||||||
|
key_bits: u16,
|
||||||
|
) !Self {
|
||||||
|
const key_length: u8 = if (key_bits <= 40) 5 else 16;
|
||||||
|
|
||||||
|
// Generate document ID (random bytes)
|
||||||
|
const document_id = try allocator.alloc(u8, 16);
|
||||||
|
errdefer allocator.free(document_id);
|
||||||
|
std.crypto.random.bytes(document_id);
|
||||||
|
|
||||||
|
// Pad passwords
|
||||||
|
var user_padded: [32]u8 = undefined;
|
||||||
|
var owner_padded: [32]u8 = undefined;
|
||||||
|
padPassword(user_password, &user_padded);
|
||||||
|
padPassword(if (owner_password.len > 0) owner_password else user_password, &owner_padded);
|
||||||
|
|
||||||
|
// Compute owner hash (Algorithm 3.3)
|
||||||
|
var owner_hash: [32]u8 = undefined;
|
||||||
|
computeOwnerHash(&owner_padded, &user_padded, key_length, &owner_hash);
|
||||||
|
|
||||||
|
// Compute encryption key (Algorithm 3.2)
|
||||||
|
const key = try allocator.alloc(u8, key_length);
|
||||||
|
errdefer allocator.free(key);
|
||||||
|
computeEncryptionKey(&user_padded, &owner_hash, permissions, document_id, key_length, key);
|
||||||
|
|
||||||
|
// Compute user hash (Algorithm 3.4/3.5)
|
||||||
|
var user_hash: [32]u8 = undefined;
|
||||||
|
computeUserHash(key, document_id, &user_hash);
|
||||||
|
|
||||||
|
return Self{
|
||||||
|
.allocator = allocator,
|
||||||
|
.key = key,
|
||||||
|
.key_length = key_length,
|
||||||
|
.owner_hash = owner_hash,
|
||||||
|
.user_hash = user_hash,
|
||||||
|
.permissions = permissions,
|
||||||
|
.document_id = document_id,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
self.allocator.free(self.key);
|
||||||
|
self.allocator.free(self.document_id);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Encrypt a string with object key
|
||||||
|
pub fn encryptString(self: *const Self, allocator: std.mem.Allocator, obj_num: u32, gen_num: u16, data: []const u8) ![]u8 {
|
||||||
|
const object_key = try self.computeObjectKey(allocator, obj_num, gen_num);
|
||||||
|
defer allocator.free(object_key);
|
||||||
|
|
||||||
|
const result = try allocator.dupe(u8, data);
|
||||||
|
var rc4 = RC4.init(object_key);
|
||||||
|
rc4.process(result);
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Encrypt a stream with object key
|
||||||
|
pub fn encryptStream(self: *const Self, allocator: std.mem.Allocator, obj_num: u32, gen_num: u16, data: []const u8) ![]u8 {
|
||||||
|
return self.encryptString(allocator, obj_num, gen_num, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compute object-specific key (Algorithm 3.1)
|
||||||
|
fn computeObjectKey(self: *const Self, allocator: std.mem.Allocator, obj_num: u32, gen_num: u16) ![]u8 {
|
||||||
|
// Create object key: key + obj_num (3 bytes LE) + gen_num (2 bytes LE)
|
||||||
|
const extended_len = self.key_length + 5;
|
||||||
|
var extended = try allocator.alloc(u8, extended_len);
|
||||||
|
defer allocator.free(extended);
|
||||||
|
|
||||||
|
@memcpy(extended[0..self.key_length], self.key);
|
||||||
|
extended[self.key_length] = @intCast(obj_num & 0xFF);
|
||||||
|
extended[self.key_length + 1] = @intCast((obj_num >> 8) & 0xFF);
|
||||||
|
extended[self.key_length + 2] = @intCast((obj_num >> 16) & 0xFF);
|
||||||
|
extended[self.key_length + 3] = @intCast(gen_num & 0xFF);
|
||||||
|
extended[self.key_length + 4] = @intCast((gen_num >> 8) & 0xFF);
|
||||||
|
|
||||||
|
// MD5 hash
|
||||||
|
var hash: [16]u8 = undefined;
|
||||||
|
std.crypto.hash.Md5.hash(extended, &hash, .{});
|
||||||
|
|
||||||
|
// Key length is min(n+5, 16)
|
||||||
|
const obj_key_len: usize = @min(@as(usize, self.key_length) + 5, 16);
|
||||||
|
const result = try allocator.alloc(u8, obj_key_len);
|
||||||
|
@memcpy(result, hash[0..obj_key_len]);
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =========================================================================
|
||||||
|
// PDF Encryption Algorithms
|
||||||
|
// =========================================================================
|
||||||
|
|
||||||
|
/// Pad password to 32 bytes
|
||||||
|
fn padPassword(password: []const u8, output: *[32]u8) void {
|
||||||
|
const len = @min(password.len, 32);
|
||||||
|
@memcpy(output[0..len], password[0..len]);
|
||||||
|
if (len < 32) {
|
||||||
|
@memcpy(output[len..32], PDF_PADDING[0 .. 32 - len]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compute owner hash (Algorithm 3.3)
|
||||||
|
fn computeOwnerHash(owner_padded: *const [32]u8, user_padded: *const [32]u8, key_length: u8, output: *[32]u8) void {
|
||||||
|
// Step 1-2: MD5 of padded owner password
|
||||||
|
var hash: [16]u8 = undefined;
|
||||||
|
std.crypto.hash.Md5.hash(owner_padded, &hash, .{});
|
||||||
|
|
||||||
|
// Step 3: For 128-bit, iterate MD5 50 times
|
||||||
|
if (key_length > 5) {
|
||||||
|
for (0..50) |_| {
|
||||||
|
std.crypto.hash.Md5.hash(&hash, &hash, .{});
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Step 4: Use first n bytes as RC4 key
|
||||||
|
const rc4_key = hash[0..key_length];
|
||||||
|
|
||||||
|
// Step 5: RC4 encrypt padded user password
|
||||||
|
var encrypted: [32]u8 = undefined;
|
||||||
|
@memcpy(&encrypted, user_padded);
|
||||||
|
|
||||||
|
var rc4 = RC4.init(rc4_key);
|
||||||
|
rc4.process(&encrypted);
|
||||||
|
|
||||||
|
// Step 6: For 128-bit, iterate 19 more times with modified key
|
||||||
|
if (key_length > 5) {
|
||||||
|
var temp_key: [16]u8 = undefined;
|
||||||
|
for (1..20) |round| {
|
||||||
|
for (0..key_length) |k| {
|
||||||
|
temp_key[k] = rc4_key[k] ^ @as(u8, @intCast(round));
|
||||||
|
}
|
||||||
|
var rc4_temp = RC4.init(temp_key[0..key_length]);
|
||||||
|
rc4_temp.process(&encrypted);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@memcpy(output, &encrypted);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compute encryption key (Algorithm 3.2)
|
||||||
|
fn computeEncryptionKey(
|
||||||
|
user_padded: *const [32]u8,
|
||||||
|
owner_hash: *const [32]u8,
|
||||||
|
permissions: Permissions,
|
||||||
|
document_id: []const u8,
|
||||||
|
key_length: u8,
|
||||||
|
output: []u8,
|
||||||
|
) void {
|
||||||
|
// Concatenate: user_padded + owner_hash + permissions (LE) + document_id
|
||||||
|
var md5 = std.crypto.hash.Md5.init(.{});
|
||||||
|
md5.update(user_padded);
|
||||||
|
md5.update(owner_hash);
|
||||||
|
|
||||||
|
const perm_value = permissions.toU32();
|
||||||
|
const perm_bytes = [_]u8{
|
||||||
|
@intCast(perm_value & 0xFF),
|
||||||
|
@intCast((perm_value >> 8) & 0xFF),
|
||||||
|
@intCast((perm_value >> 16) & 0xFF),
|
||||||
|
@intCast((perm_value >> 24) & 0xFF),
|
||||||
|
};
|
||||||
|
md5.update(&perm_bytes);
|
||||||
|
md5.update(document_id);
|
||||||
|
|
||||||
|
var hash: [16]u8 = undefined;
|
||||||
|
md5.final(&hash);
|
||||||
|
|
||||||
|
// For 128-bit, iterate MD5 50 times
|
||||||
|
if (key_length > 5) {
|
||||||
|
for (0..50) |_| {
|
||||||
|
std.crypto.hash.Md5.hash(hash[0..key_length], &hash, .{});
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@memcpy(output, hash[0..key_length]);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Compute user hash (Algorithm 3.4 for 40-bit, 3.5 for 128-bit)
|
||||||
|
fn computeUserHash(key: []const u8, document_id: []const u8, output: *[32]u8) void {
|
||||||
|
if (key.len <= 5) {
|
||||||
|
// 40-bit: RC4 encrypt padding
|
||||||
|
@memcpy(output, &PDF_PADDING);
|
||||||
|
var rc4 = RC4.init(key);
|
||||||
|
rc4.process(output);
|
||||||
|
} else {
|
||||||
|
// 128-bit: MD5(padding + document_id), then RC4 with key iterations
|
||||||
|
var md5 = std.crypto.hash.Md5.init(.{});
|
||||||
|
md5.update(&PDF_PADDING);
|
||||||
|
md5.update(document_id);
|
||||||
|
var hash: [16]u8 = undefined;
|
||||||
|
md5.final(&hash);
|
||||||
|
|
||||||
|
// RC4 encrypt
|
||||||
|
var encrypted: [16]u8 = undefined;
|
||||||
|
@memcpy(&encrypted, &hash);
|
||||||
|
var rc4 = RC4.init(key);
|
||||||
|
rc4.process(&encrypted);
|
||||||
|
|
||||||
|
// Iterate 19 more times with XOR'd key
|
||||||
|
var temp_key: [16]u8 = undefined;
|
||||||
|
for (1..20) |round| {
|
||||||
|
for (0..key.len) |k| {
|
||||||
|
temp_key[k] = key[k] ^ @as(u8, @intCast(round));
|
||||||
|
}
|
||||||
|
var rc4_temp = RC4.init(temp_key[0..key.len]);
|
||||||
|
rc4_temp.process(&encrypted);
|
||||||
|
}
|
||||||
|
|
||||||
|
// First 16 bytes = encrypted, last 16 bytes = arbitrary
|
||||||
|
@memcpy(output[0..16], &encrypted);
|
||||||
|
@memcpy(output[16..32], PDF_PADDING[0..16]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Permission flags for PDF documents
|
||||||
|
pub const Permissions = struct {
|
||||||
|
/// Allow printing
|
||||||
|
print: bool = true,
|
||||||
|
/// Allow modifying contents
|
||||||
|
modify: bool = true,
|
||||||
|
/// Allow copying text and graphics
|
||||||
|
copy: bool = true,
|
||||||
|
/// Allow adding/modifying annotations
|
||||||
|
annotate: bool = true,
|
||||||
|
/// Allow form filling (PDF 1.4)
|
||||||
|
fill_forms: bool = true,
|
||||||
|
/// Allow accessibility extraction (PDF 1.4)
|
||||||
|
accessibility: bool = true,
|
||||||
|
/// Allow document assembly (PDF 1.4)
|
||||||
|
assemble: bool = true,
|
||||||
|
/// Allow high-quality printing (PDF 1.4)
|
||||||
|
print_high_quality: bool = true,
|
||||||
|
|
||||||
|
pub fn toU32(self: Permissions) u32 {
|
||||||
|
var p: u32 = 0xFFFFF0C0; // Reserved bits must be 1
|
||||||
|
|
||||||
|
if (self.print) p |= (1 << 2);
|
||||||
|
if (self.modify) p |= (1 << 3);
|
||||||
|
if (self.copy) p |= (1 << 4);
|
||||||
|
if (self.annotate) p |= (1 << 5);
|
||||||
|
if (self.fill_forms) p |= (1 << 8);
|
||||||
|
if (self.accessibility) p |= (1 << 9);
|
||||||
|
if (self.assemble) p |= (1 << 10);
|
||||||
|
if (self.print_high_quality) p |= (1 << 11);
|
||||||
|
|
||||||
|
return p;
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn allAllowed() Permissions {
|
||||||
|
return .{};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn readOnly() Permissions {
|
||||||
|
return .{
|
||||||
|
.print = false,
|
||||||
|
.modify = false,
|
||||||
|
.copy = false,
|
||||||
|
.annotate = false,
|
||||||
|
.fill_forms = false,
|
||||||
|
.assemble = false,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Options for PDF encryption
|
||||||
|
pub const EncryptionOptions = struct {
|
||||||
|
/// User password (empty for no password required to open)
|
||||||
|
user_password: []const u8 = "",
|
||||||
|
/// Owner password (for full access, empty uses user_password)
|
||||||
|
owner_password: []const u8 = "",
|
||||||
|
/// Permission flags
|
||||||
|
permissions: Permissions = Permissions.allAllowed(),
|
||||||
|
/// Key length in bits (40 or 128)
|
||||||
|
key_bits: u16 = 128,
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "Permissions toU32" {
|
||||||
|
const all = Permissions.allAllowed();
|
||||||
|
const value = all.toU32();
|
||||||
|
// All permission bits should be set
|
||||||
|
try std.testing.expect(value & (1 << 2) != 0); // print
|
||||||
|
try std.testing.expect(value & (1 << 3) != 0); // modify
|
||||||
|
try std.testing.expect(value & (1 << 4) != 0); // copy
|
||||||
|
try std.testing.expect(value & (1 << 5) != 0); // annotate
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Encryption init and deinit" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var enc = try Encryption.init(
|
||||||
|
allocator,
|
||||||
|
"user",
|
||||||
|
"owner",
|
||||||
|
Permissions.allAllowed(),
|
||||||
|
128,
|
||||||
|
);
|
||||||
|
defer enc.deinit();
|
||||||
|
|
||||||
|
try std.testing.expectEqual(@as(u8, 16), enc.key_length);
|
||||||
|
try std.testing.expectEqual(@as(usize, 16), enc.document_id.len);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Encryption encrypt string" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var enc = try Encryption.init(
|
||||||
|
allocator,
|
||||||
|
"test",
|
||||||
|
"test",
|
||||||
|
Permissions.allAllowed(),
|
||||||
|
40,
|
||||||
|
);
|
||||||
|
defer enc.deinit();
|
||||||
|
|
||||||
|
const plaintext = "Hello, World!";
|
||||||
|
const encrypted = try enc.encryptString(allocator, 1, 0, plaintext);
|
||||||
|
defer allocator.free(encrypted);
|
||||||
|
|
||||||
|
// Encrypted should be different from plaintext
|
||||||
|
try std.testing.expect(!std.mem.eql(u8, plaintext, encrypted));
|
||||||
|
|
||||||
|
// Encrypt again should produce same result (same key)
|
||||||
|
const encrypted2 = try enc.encryptString(allocator, 1, 0, plaintext);
|
||||||
|
defer allocator.free(encrypted2);
|
||||||
|
try std.testing.expectEqualSlices(u8, encrypted, encrypted2);
|
||||||
|
}
|
||||||
15
src/security/mod.zig
Normal file
15
src/security/mod.zig
Normal file
|
|
@ -0,0 +1,15 @@
|
||||||
|
//! Security module - PDF encryption
|
||||||
|
//!
|
||||||
|
//! Implements PDF encryption using RC4 (PDF 1.4 compatible).
|
||||||
|
//! Supports 40-bit and 128-bit key lengths.
|
||||||
|
//!
|
||||||
|
//! WARNING: RC4 is considered cryptographically weak by modern standards.
|
||||||
|
//! This implementation is for compatibility with PDF 1.4 readers, not for
|
||||||
|
//! high-security applications.
|
||||||
|
|
||||||
|
pub const encryption = @import("encryption.zig");
|
||||||
|
pub const Encryption = encryption.Encryption;
|
||||||
|
pub const EncryptionOptions = encryption.EncryptionOptions;
|
||||||
|
pub const Permissions = encryption.Permissions;
|
||||||
|
pub const rc4 = @import("rc4.zig");
|
||||||
|
pub const RC4 = rc4.RC4;
|
||||||
116
src/security/rc4.zig
Normal file
116
src/security/rc4.zig
Normal file
|
|
@ -0,0 +1,116 @@
|
||||||
|
//! RC4 Stream Cipher
|
||||||
|
//!
|
||||||
|
//! Implements the RC4 cipher for PDF encryption.
|
||||||
|
//! Based on the original RC4 algorithm (ARC4).
|
||||||
|
//!
|
||||||
|
//! WARNING: RC4 is cryptographically weak and should not be used
|
||||||
|
//! for new security applications. This is implemented for PDF 1.4
|
||||||
|
//! compatibility only.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// RC4 stream cipher
|
||||||
|
pub const RC4 = struct {
|
||||||
|
s: [256]u8,
|
||||||
|
i: u8,
|
||||||
|
j: u8,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
/// Initialize RC4 with a key (1-256 bytes)
|
||||||
|
pub fn init(key: []const u8) Self {
|
||||||
|
var self = Self{
|
||||||
|
.s = undefined,
|
||||||
|
.i = 0,
|
||||||
|
.j = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Initialize S-box
|
||||||
|
for (0..256) |n| {
|
||||||
|
self.s[n] = @intCast(n);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Key-scheduling algorithm (KSA)
|
||||||
|
var j: u8 = 0;
|
||||||
|
for (0..256) |i_usize| {
|
||||||
|
const i: u8 = @intCast(i_usize);
|
||||||
|
j = j +% self.s[i] +% key[i_usize % key.len];
|
||||||
|
std.mem.swap(u8, &self.s[i], &self.s[j]);
|
||||||
|
}
|
||||||
|
|
||||||
|
return self;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Generate next byte of keystream
|
||||||
|
pub fn nextByte(self: *Self) u8 {
|
||||||
|
self.i = self.i +% 1;
|
||||||
|
self.j = self.j +% self.s[self.i];
|
||||||
|
std.mem.swap(u8, &self.s[self.i], &self.s[self.j]);
|
||||||
|
return self.s[self.s[self.i] +% self.s[self.j]];
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Encrypt/decrypt data in place (XOR with keystream)
|
||||||
|
pub fn process(self: *Self, data: []u8) void {
|
||||||
|
for (data) |*byte| {
|
||||||
|
byte.* ^= self.nextByte();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Encrypt/decrypt data, writing to output buffer
|
||||||
|
pub fn processTo(self: *Self, input: []const u8, output: []u8) void {
|
||||||
|
std.debug.assert(output.len >= input.len);
|
||||||
|
for (input, 0..) |byte, idx| {
|
||||||
|
output[idx] = byte ^ self.nextByte();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "RC4 basic encryption" {
|
||||||
|
const key = "Key";
|
||||||
|
const plaintext = "Plaintext";
|
||||||
|
var data: [9]u8 = undefined;
|
||||||
|
@memcpy(&data, plaintext);
|
||||||
|
|
||||||
|
var rc4 = RC4.init(key);
|
||||||
|
rc4.process(&data);
|
||||||
|
|
||||||
|
// RC4 is symmetric - encrypting again decrypts
|
||||||
|
var rc4_decrypt = RC4.init(key);
|
||||||
|
rc4_decrypt.process(&data);
|
||||||
|
|
||||||
|
try std.testing.expectEqualSlices(u8, plaintext, &data);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "RC4 known test vector" {
|
||||||
|
// Test vector from Wikipedia RC4 article
|
||||||
|
const key = "Key";
|
||||||
|
const plaintext = "Plaintext";
|
||||||
|
var data: [9]u8 = undefined;
|
||||||
|
@memcpy(&data, plaintext);
|
||||||
|
|
||||||
|
var rc4 = RC4.init(key);
|
||||||
|
rc4.process(&data);
|
||||||
|
|
||||||
|
// Expected ciphertext (hex): BBF316E8D940AF0AD3
|
||||||
|
const expected = [_]u8{ 0xBB, 0xF3, 0x16, 0xE8, 0xD9, 0x40, 0xAF, 0x0A, 0xD3 };
|
||||||
|
try std.testing.expectEqualSlices(u8, &expected, &data);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "RC4 Wiki test vector" {
|
||||||
|
// Another test vector: Key="Wiki", Plaintext="pedia"
|
||||||
|
const key = "Wiki";
|
||||||
|
const plaintext = "pedia";
|
||||||
|
var data: [5]u8 = undefined;
|
||||||
|
@memcpy(&data, plaintext);
|
||||||
|
|
||||||
|
var rc4 = RC4.init(key);
|
||||||
|
rc4.process(&data);
|
||||||
|
|
||||||
|
// Expected ciphertext (hex): 1021BF0420
|
||||||
|
const expected = [_]u8{ 0x10, 0x21, 0xBF, 0x04, 0x20 };
|
||||||
|
try std.testing.expectEqualSlices(u8, &expected, &data);
|
||||||
|
}
|
||||||
13
src/svg/mod.zig
Normal file
13
src/svg/mod.zig
Normal file
|
|
@ -0,0 +1,13 @@
|
||||||
|
//! SVG Import module
|
||||||
|
//!
|
||||||
|
//! Provides basic SVG parsing for embedding vector graphics in PDF.
|
||||||
|
//! Supports a subset of SVG elements: path, rect, circle, ellipse, line, polyline, polygon.
|
||||||
|
//!
|
||||||
|
//! Note: This is a simplified implementation. Full SVG support would require
|
||||||
|
//! a complete XML parser and extensive path command handling.
|
||||||
|
|
||||||
|
pub const parser = @import("parser.zig");
|
||||||
|
pub const SvgParser = parser.SvgParser;
|
||||||
|
pub const SvgElement = parser.SvgElement;
|
||||||
|
pub const SvgPath = parser.SvgPath;
|
||||||
|
pub const PathCommand = parser.PathCommand;
|
||||||
708
src/svg/parser.zig
Normal file
708
src/svg/parser.zig
Normal file
|
|
@ -0,0 +1,708 @@
|
||||||
|
//! SVG Parser
|
||||||
|
//!
|
||||||
|
//! Parses a subset of SVG elements for conversion to PDF graphics.
|
||||||
|
//! This is a simplified parser - not a full XML parser.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// SVG document representation
|
||||||
|
pub const SvgParser = struct {
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
elements: std.ArrayListUnmanaged(SvgElement),
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn init(allocator: std.mem.Allocator) Self {
|
||||||
|
return .{
|
||||||
|
.allocator = allocator,
|
||||||
|
.width = 100,
|
||||||
|
.height = 100,
|
||||||
|
.elements = .{},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
for (self.elements.items) |*elem| {
|
||||||
|
elem.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
self.elements.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Parse SVG content (simplified - not full XML)
|
||||||
|
pub fn parse(self: *Self, svg_content: []const u8) !void {
|
||||||
|
// Extract width/height from svg element
|
||||||
|
if (findAttribute(svg_content, "width")) |w| {
|
||||||
|
self.width = parseNumber(w) orelse 100;
|
||||||
|
}
|
||||||
|
if (findAttribute(svg_content, "height")) |h| {
|
||||||
|
self.height = parseNumber(h) orelse 100;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Find and parse elements
|
||||||
|
var pos: usize = 0;
|
||||||
|
while (pos < svg_content.len) {
|
||||||
|
if (findElement(svg_content[pos..], "rect")) |elem_data| {
|
||||||
|
const elem = try parseRect(self.allocator, elem_data.content);
|
||||||
|
try self.elements.append(self.allocator, elem);
|
||||||
|
pos += elem_data.end;
|
||||||
|
} else if (findElement(svg_content[pos..], "circle")) |elem_data| {
|
||||||
|
const elem = try parseCircle(self.allocator, elem_data.content);
|
||||||
|
try self.elements.append(self.allocator, elem);
|
||||||
|
pos += elem_data.end;
|
||||||
|
} else if (findElement(svg_content[pos..], "ellipse")) |elem_data| {
|
||||||
|
const elem = try parseEllipse(self.allocator, elem_data.content);
|
||||||
|
try self.elements.append(self.allocator, elem);
|
||||||
|
pos += elem_data.end;
|
||||||
|
} else if (findElement(svg_content[pos..], "line")) |elem_data| {
|
||||||
|
const elem = try parseLine(self.allocator, elem_data.content);
|
||||||
|
try self.elements.append(self.allocator, elem);
|
||||||
|
pos += elem_data.end;
|
||||||
|
} else if (findElement(svg_content[pos..], "path")) |elem_data| {
|
||||||
|
const elem = try parsePath(self.allocator, elem_data.content);
|
||||||
|
try self.elements.append(self.allocator, elem);
|
||||||
|
pos += elem_data.end;
|
||||||
|
} else {
|
||||||
|
pos += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Convert to PDF content stream commands
|
||||||
|
pub fn toPdfContent(self: *const Self, allocator: std.mem.Allocator, x: f32, y: f32, scale: f32) ![]u8 {
|
||||||
|
var buffer: std.ArrayListUnmanaged(u8) = .{};
|
||||||
|
const writer = buffer.writer(allocator);
|
||||||
|
|
||||||
|
// Save state
|
||||||
|
try writer.writeAll("q\n");
|
||||||
|
|
||||||
|
// Translate and scale
|
||||||
|
try writer.print("{d:.3} 0 0 {d:.3} {d:.3} {d:.3} cm\n", .{
|
||||||
|
scale,
|
||||||
|
scale,
|
||||||
|
x,
|
||||||
|
y,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Render elements
|
||||||
|
for (self.elements.items) |elem| {
|
||||||
|
try renderElement(writer, elem);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Restore state
|
||||||
|
try writer.writeAll("Q\n");
|
||||||
|
|
||||||
|
return buffer.toOwnedSlice(allocator);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// SVG element types
|
||||||
|
pub const SvgElement = struct {
|
||||||
|
element_type: ElementType,
|
||||||
|
fill: ?Color = null,
|
||||||
|
stroke: ?Color = null,
|
||||||
|
stroke_width: f32 = 1,
|
||||||
|
data: ElementData,
|
||||||
|
|
||||||
|
pub fn deinit(self: *SvgElement, allocator: std.mem.Allocator) void {
|
||||||
|
switch (self.data) {
|
||||||
|
.path => |path| {
|
||||||
|
allocator.free(path.commands);
|
||||||
|
},
|
||||||
|
else => {},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const ElementType = enum {
|
||||||
|
rect,
|
||||||
|
circle,
|
||||||
|
ellipse,
|
||||||
|
line,
|
||||||
|
path,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const ElementData = union(ElementType) {
|
||||||
|
rect: RectData,
|
||||||
|
circle: CircleData,
|
||||||
|
ellipse: EllipseData,
|
||||||
|
line: LineData,
|
||||||
|
path: SvgPath,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const RectData = struct {
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
rx: f32 = 0, // Corner radius
|
||||||
|
ry: f32 = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const CircleData = struct {
|
||||||
|
cx: f32,
|
||||||
|
cy: f32,
|
||||||
|
r: f32,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const EllipseData = struct {
|
||||||
|
cx: f32,
|
||||||
|
cy: f32,
|
||||||
|
rx: f32,
|
||||||
|
ry: f32,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const LineData = struct {
|
||||||
|
x1: f32,
|
||||||
|
y1: f32,
|
||||||
|
x2: f32,
|
||||||
|
y2: f32,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// SVG path element
|
||||||
|
pub const SvgPath = struct {
|
||||||
|
commands: []PathCommand,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Path command types
|
||||||
|
pub const PathCommand = struct {
|
||||||
|
command: CommandType,
|
||||||
|
args: [6]f32, // Max 6 args for cubic bezier
|
||||||
|
arg_count: u8,
|
||||||
|
|
||||||
|
pub const CommandType = enum {
|
||||||
|
move_to,
|
||||||
|
line_to,
|
||||||
|
horizontal_line,
|
||||||
|
vertical_line,
|
||||||
|
cubic_bezier,
|
||||||
|
quadratic_bezier,
|
||||||
|
arc,
|
||||||
|
close_path,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Color representation
|
||||||
|
pub const Color = struct {
|
||||||
|
r: u8,
|
||||||
|
g: u8,
|
||||||
|
b: u8,
|
||||||
|
|
||||||
|
pub fn fromHex(hex: u32) Color {
|
||||||
|
return .{
|
||||||
|
.r = @intCast((hex >> 16) & 0xFF),
|
||||||
|
.g = @intCast((hex >> 8) & 0xFF),
|
||||||
|
.b = @intCast(hex & 0xFF),
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn toFloats(self: Color) [3]f32 {
|
||||||
|
return .{
|
||||||
|
@as(f32, @floatFromInt(self.r)) / 255.0,
|
||||||
|
@as(f32, @floatFromInt(self.g)) / 255.0,
|
||||||
|
@as(f32, @floatFromInt(self.b)) / 255.0,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Parsing Helpers
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
const ElementMatch = struct {
|
||||||
|
content: []const u8,
|
||||||
|
end: usize,
|
||||||
|
};
|
||||||
|
|
||||||
|
fn findElement(data: []const u8, tag: []const u8) ?ElementMatch {
|
||||||
|
// Find <tag ...> or <tag .../>
|
||||||
|
var search = std.mem.indexOf(u8, data, "<") orelse return null;
|
||||||
|
while (search < data.len) {
|
||||||
|
const start = search;
|
||||||
|
if (start + 1 + tag.len >= data.len) return null;
|
||||||
|
|
||||||
|
// Check if this is the tag we're looking for
|
||||||
|
const after_bracket = data[start + 1 ..];
|
||||||
|
if (std.mem.startsWith(u8, after_bracket, tag)) {
|
||||||
|
// Make sure it's not a partial match (e.g., "rect" matching "rectangle")
|
||||||
|
const next_char_idx = tag.len;
|
||||||
|
if (next_char_idx < after_bracket.len) {
|
||||||
|
const next_char = after_bracket[next_char_idx];
|
||||||
|
if (next_char == ' ' or next_char == '/' or next_char == '>') {
|
||||||
|
// Find end of element
|
||||||
|
const end_self = std.mem.indexOf(u8, data[start..], "/>") orelse data.len - start;
|
||||||
|
const end_close = std.mem.indexOf(u8, data[start..], ">") orelse data.len - start;
|
||||||
|
const end = @min(end_self, end_close) + start + 2;
|
||||||
|
|
||||||
|
return .{
|
||||||
|
.content = data[start..end],
|
||||||
|
.end = end,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Find next '<'
|
||||||
|
search = std.mem.indexOf(u8, data[start + 1 ..], "<") orelse return null;
|
||||||
|
search += start + 1;
|
||||||
|
}
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn findAttribute(data: []const u8, name: []const u8) ?[]const u8 {
|
||||||
|
// Simple attribute finder: name="value" or name='value'
|
||||||
|
var search_pattern: [64]u8 = undefined;
|
||||||
|
const pattern = std.fmt.bufPrint(&search_pattern, "{s}=\"", .{name}) catch return null;
|
||||||
|
|
||||||
|
if (std.mem.indexOf(u8, data, pattern)) |start| {
|
||||||
|
const value_start = start + pattern.len;
|
||||||
|
const value_end = std.mem.indexOf(u8, data[value_start..], "\"") orelse return null;
|
||||||
|
return data[value_start .. value_start + value_end];
|
||||||
|
}
|
||||||
|
|
||||||
|
// Try single quotes
|
||||||
|
const pattern_sq = std.fmt.bufPrint(&search_pattern, "{s}='", .{name}) catch return null;
|
||||||
|
if (std.mem.indexOf(u8, data, pattern_sq)) |start| {
|
||||||
|
const value_start = start + pattern_sq.len;
|
||||||
|
const value_end = std.mem.indexOf(u8, data[value_start..], "'") orelse return null;
|
||||||
|
return data[value_start .. value_start + value_end];
|
||||||
|
}
|
||||||
|
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseNumber(str: []const u8) ?f32 {
|
||||||
|
// Remove units like "px", "pt", etc.
|
||||||
|
var end = str.len;
|
||||||
|
while (end > 0 and !std.ascii.isDigit(str[end - 1]) and str[end - 1] != '.') {
|
||||||
|
end -= 1;
|
||||||
|
}
|
||||||
|
if (end == 0) return null;
|
||||||
|
return std.fmt.parseFloat(f32, str[0..end]) catch null;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseColor(str: []const u8) ?Color {
|
||||||
|
if (str.len == 0) return null;
|
||||||
|
|
||||||
|
// Handle "none"
|
||||||
|
if (std.mem.eql(u8, str, "none")) return null;
|
||||||
|
|
||||||
|
// Handle #RGB or #RRGGBB
|
||||||
|
if (str[0] == '#') {
|
||||||
|
if (str.len == 4) {
|
||||||
|
// #RGB
|
||||||
|
const r = std.fmt.parseInt(u8, str[1..2], 16) catch return null;
|
||||||
|
const g = std.fmt.parseInt(u8, str[2..3], 16) catch return null;
|
||||||
|
const b = std.fmt.parseInt(u8, str[3..4], 16) catch return null;
|
||||||
|
return .{ .r = r * 17, .g = g * 17, .b = b * 17 };
|
||||||
|
} else if (str.len == 7) {
|
||||||
|
// #RRGGBB
|
||||||
|
const r = std.fmt.parseInt(u8, str[1..3], 16) catch return null;
|
||||||
|
const g = std.fmt.parseInt(u8, str[3..5], 16) catch return null;
|
||||||
|
const b = std.fmt.parseInt(u8, str[5..7], 16) catch return null;
|
||||||
|
return .{ .r = r, .g = g, .b = b };
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Handle named colors (basic set)
|
||||||
|
if (std.mem.eql(u8, str, "black")) return Color.fromHex(0x000000);
|
||||||
|
if (std.mem.eql(u8, str, "white")) return Color.fromHex(0xFFFFFF);
|
||||||
|
if (std.mem.eql(u8, str, "red")) return Color.fromHex(0xFF0000);
|
||||||
|
if (std.mem.eql(u8, str, "green")) return Color.fromHex(0x008000);
|
||||||
|
if (std.mem.eql(u8, str, "blue")) return Color.fromHex(0x0000FF);
|
||||||
|
if (std.mem.eql(u8, str, "yellow")) return Color.fromHex(0xFFFF00);
|
||||||
|
if (std.mem.eql(u8, str, "orange")) return Color.fromHex(0xFFA500);
|
||||||
|
if (std.mem.eql(u8, str, "gray") or std.mem.eql(u8, str, "grey")) return Color.fromHex(0x808080);
|
||||||
|
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseRect(allocator: std.mem.Allocator, data: []const u8) !SvgElement {
|
||||||
|
_ = allocator;
|
||||||
|
return .{
|
||||||
|
.element_type = .rect,
|
||||||
|
.fill = if (findAttribute(data, "fill")) |f| parseColor(f) else Color.fromHex(0x000000),
|
||||||
|
.stroke = if (findAttribute(data, "stroke")) |s| parseColor(s) else null,
|
||||||
|
.stroke_width = if (findAttribute(data, "stroke-width")) |sw| parseNumber(sw) orelse 1 else 1,
|
||||||
|
.data = .{
|
||||||
|
.rect = .{
|
||||||
|
.x = if (findAttribute(data, "x")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.y = if (findAttribute(data, "y")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.width = if (findAttribute(data, "width")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.height = if (findAttribute(data, "height")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.rx = if (findAttribute(data, "rx")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.ry = if (findAttribute(data, "ry")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
},
|
||||||
|
},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseCircle(allocator: std.mem.Allocator, data: []const u8) !SvgElement {
|
||||||
|
_ = allocator;
|
||||||
|
return .{
|
||||||
|
.element_type = .circle,
|
||||||
|
.fill = if (findAttribute(data, "fill")) |f| parseColor(f) else Color.fromHex(0x000000),
|
||||||
|
.stroke = if (findAttribute(data, "stroke")) |s| parseColor(s) else null,
|
||||||
|
.stroke_width = if (findAttribute(data, "stroke-width")) |sw| parseNumber(sw) orelse 1 else 1,
|
||||||
|
.data = .{
|
||||||
|
.circle = .{
|
||||||
|
.cx = if (findAttribute(data, "cx")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.cy = if (findAttribute(data, "cy")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.r = if (findAttribute(data, "r")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
},
|
||||||
|
},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseEllipse(allocator: std.mem.Allocator, data: []const u8) !SvgElement {
|
||||||
|
_ = allocator;
|
||||||
|
return .{
|
||||||
|
.element_type = .ellipse,
|
||||||
|
.fill = if (findAttribute(data, "fill")) |f| parseColor(f) else Color.fromHex(0x000000),
|
||||||
|
.stroke = if (findAttribute(data, "stroke")) |s| parseColor(s) else null,
|
||||||
|
.stroke_width = if (findAttribute(data, "stroke-width")) |sw| parseNumber(sw) orelse 1 else 1,
|
||||||
|
.data = .{
|
||||||
|
.ellipse = .{
|
||||||
|
.cx = if (findAttribute(data, "cx")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.cy = if (findAttribute(data, "cy")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.rx = if (findAttribute(data, "rx")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.ry = if (findAttribute(data, "ry")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
},
|
||||||
|
},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parseLine(allocator: std.mem.Allocator, data: []const u8) !SvgElement {
|
||||||
|
_ = allocator;
|
||||||
|
return .{
|
||||||
|
.element_type = .line,
|
||||||
|
.fill = null,
|
||||||
|
.stroke = if (findAttribute(data, "stroke")) |s| parseColor(s) else Color.fromHex(0x000000),
|
||||||
|
.stroke_width = if (findAttribute(data, "stroke-width")) |sw| parseNumber(sw) orelse 1 else 1,
|
||||||
|
.data = .{
|
||||||
|
.line = .{
|
||||||
|
.x1 = if (findAttribute(data, "x1")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.y1 = if (findAttribute(data, "y1")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.x2 = if (findAttribute(data, "x2")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
.y2 = if (findAttribute(data, "y2")) |v| parseNumber(v) orelse 0 else 0,
|
||||||
|
},
|
||||||
|
},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parsePath(allocator: std.mem.Allocator, data: []const u8) !SvgElement {
|
||||||
|
const d = findAttribute(data, "d") orelse "";
|
||||||
|
|
||||||
|
// Parse path commands (simplified - only M, L, C, Z)
|
||||||
|
var commands: std.ArrayListUnmanaged(PathCommand) = .{};
|
||||||
|
|
||||||
|
var i: usize = 0;
|
||||||
|
while (i < d.len) {
|
||||||
|
const c = d[i];
|
||||||
|
switch (c) {
|
||||||
|
'M', 'm' => {
|
||||||
|
// Move to
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 2);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .move_to,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 2,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'L', 'l' => {
|
||||||
|
// Line to
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 2);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .line_to,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 2,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'H', 'h' => {
|
||||||
|
// Horizontal line
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 1);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .horizontal_line,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 1,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'V', 'v' => {
|
||||||
|
// Vertical line
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 1);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .vertical_line,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 1,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'C', 'c' => {
|
||||||
|
// Cubic bezier
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 6);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .cubic_bezier,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 6,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'Q', 'q' => {
|
||||||
|
// Quadratic bezier
|
||||||
|
i += 1;
|
||||||
|
const args = try parsePathArgs(d[i..], 4);
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .quadratic_bezier,
|
||||||
|
.args = args.values,
|
||||||
|
.arg_count = 4,
|
||||||
|
});
|
||||||
|
i += args.consumed;
|
||||||
|
},
|
||||||
|
'Z', 'z' => {
|
||||||
|
// Close path
|
||||||
|
try commands.append(allocator, .{
|
||||||
|
.command = .close_path,
|
||||||
|
.args = .{ 0, 0, 0, 0, 0, 0 },
|
||||||
|
.arg_count = 0,
|
||||||
|
});
|
||||||
|
i += 1;
|
||||||
|
},
|
||||||
|
else => i += 1,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return .{
|
||||||
|
.element_type = .path,
|
||||||
|
.fill = if (findAttribute(data, "fill")) |f| parseColor(f) else Color.fromHex(0x000000),
|
||||||
|
.stroke = if (findAttribute(data, "stroke")) |s| parseColor(s) else null,
|
||||||
|
.stroke_width = if (findAttribute(data, "stroke-width")) |sw| parseNumber(sw) orelse 1 else 1,
|
||||||
|
.data = .{
|
||||||
|
.path = .{
|
||||||
|
.commands = try commands.toOwnedSlice(allocator),
|
||||||
|
},
|
||||||
|
},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
const PathArgs = struct {
|
||||||
|
values: [6]f32,
|
||||||
|
consumed: usize,
|
||||||
|
};
|
||||||
|
|
||||||
|
fn parsePathArgs(data: []const u8, count: usize) !PathArgs {
|
||||||
|
var result = PathArgs{
|
||||||
|
.values = .{ 0, 0, 0, 0, 0, 0 },
|
||||||
|
.consumed = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
var i: usize = 0;
|
||||||
|
var arg_idx: usize = 0;
|
||||||
|
|
||||||
|
while (arg_idx < count and i < data.len) {
|
||||||
|
// Skip whitespace and commas
|
||||||
|
while (i < data.len and (data[i] == ' ' or data[i] == ',' or data[i] == '\n' or data[i] == '\r' or data[i] == '\t')) {
|
||||||
|
i += 1;
|
||||||
|
}
|
||||||
|
if (i >= data.len) break;
|
||||||
|
|
||||||
|
// Check for next command
|
||||||
|
if (std.ascii.isAlphabetic(data[i])) break;
|
||||||
|
|
||||||
|
// Find end of number
|
||||||
|
const start = i;
|
||||||
|
if (data[i] == '-' or data[i] == '+') i += 1;
|
||||||
|
while (i < data.len and (std.ascii.isDigit(data[i]) or data[i] == '.')) {
|
||||||
|
i += 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (start < i) {
|
||||||
|
result.values[arg_idx] = std.fmt.parseFloat(f32, data[start..i]) catch 0;
|
||||||
|
arg_idx += 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
result.consumed = i;
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// PDF Rendering
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
fn renderElement(writer: anytype, elem: SvgElement) !void {
|
||||||
|
// Set colors
|
||||||
|
if (elem.fill) |fill| {
|
||||||
|
const c = fill.toFloats();
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} rg\n", .{ c[0], c[1], c[2] });
|
||||||
|
}
|
||||||
|
if (elem.stroke) |stroke| {
|
||||||
|
const c = stroke.toFloats();
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} RG\n", .{ c[0], c[1], c[2] });
|
||||||
|
try writer.print("{d:.3} w\n", .{elem.stroke_width});
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (elem.data) {
|
||||||
|
.rect => |r| {
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} re\n", .{ r.x, r.y, r.width, r.height });
|
||||||
|
if (elem.fill != null and elem.stroke != null) {
|
||||||
|
try writer.writeAll("B\n");
|
||||||
|
} else if (elem.fill != null) {
|
||||||
|
try writer.writeAll("f\n");
|
||||||
|
} else {
|
||||||
|
try writer.writeAll("S\n");
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.circle => |c| {
|
||||||
|
// Approximate circle with bezier curves
|
||||||
|
try renderCircle(writer, c.cx, c.cy, c.r);
|
||||||
|
if (elem.fill != null and elem.stroke != null) {
|
||||||
|
try writer.writeAll("B\n");
|
||||||
|
} else if (elem.fill != null) {
|
||||||
|
try writer.writeAll("f\n");
|
||||||
|
} else {
|
||||||
|
try writer.writeAll("S\n");
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.ellipse => |e| {
|
||||||
|
// Approximate ellipse with bezier curves
|
||||||
|
try renderEllipse(writer, e.cx, e.cy, e.rx, e.ry);
|
||||||
|
if (elem.fill != null and elem.stroke != null) {
|
||||||
|
try writer.writeAll("B\n");
|
||||||
|
} else if (elem.fill != null) {
|
||||||
|
try writer.writeAll("f\n");
|
||||||
|
} else {
|
||||||
|
try writer.writeAll("S\n");
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.line => |l| {
|
||||||
|
try writer.print("{d:.3} {d:.3} m\n", .{ l.x1, l.y1 });
|
||||||
|
try writer.print("{d:.3} {d:.3} l\n", .{ l.x2, l.y2 });
|
||||||
|
try writer.writeAll("S\n");
|
||||||
|
},
|
||||||
|
.path => |p| {
|
||||||
|
for (p.commands) |cmd| {
|
||||||
|
switch (cmd.command) {
|
||||||
|
.move_to => try writer.print("{d:.3} {d:.3} m\n", .{ cmd.args[0], cmd.args[1] }),
|
||||||
|
.line_to => try writer.print("{d:.3} {d:.3} l\n", .{ cmd.args[0], cmd.args[1] }),
|
||||||
|
.cubic_bezier => try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cmd.args[0], cmd.args[1], cmd.args[2],
|
||||||
|
cmd.args[3], cmd.args[4], cmd.args[5],
|
||||||
|
}),
|
||||||
|
.close_path => try writer.writeAll("h\n"),
|
||||||
|
else => {},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (elem.fill != null and elem.stroke != null) {
|
||||||
|
try writer.writeAll("B\n");
|
||||||
|
} else if (elem.fill != null) {
|
||||||
|
try writer.writeAll("f\n");
|
||||||
|
} else {
|
||||||
|
try writer.writeAll("S\n");
|
||||||
|
}
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn renderCircle(writer: anytype, cx: f32, cy: f32, r: f32) !void {
|
||||||
|
// Bezier approximation constant
|
||||||
|
const k: f32 = 0.5522847498;
|
||||||
|
const kr = k * r;
|
||||||
|
|
||||||
|
try writer.print("{d:.3} {d:.3} m\n", .{ cx + r, cy });
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx + r, cy + kr,
|
||||||
|
cx + kr, cy + r,
|
||||||
|
cx, cy + r,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx - kr, cy + r,
|
||||||
|
cx - r, cy + kr,
|
||||||
|
cx - r, cy,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx - r, cy - kr,
|
||||||
|
cx - kr, cy - r,
|
||||||
|
cx, cy - r,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx + kr, cy - r,
|
||||||
|
cx + r, cy - kr,
|
||||||
|
cx + r, cy,
|
||||||
|
});
|
||||||
|
try writer.writeAll("h\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
fn renderEllipse(writer: anytype, cx: f32, cy: f32, rx: f32, ry: f32) !void {
|
||||||
|
const k: f32 = 0.5522847498;
|
||||||
|
const krx = k * rx;
|
||||||
|
const kry = k * ry;
|
||||||
|
|
||||||
|
try writer.print("{d:.3} {d:.3} m\n", .{ cx + rx, cy });
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx + rx, cy + kry,
|
||||||
|
cx + krx, cy + ry,
|
||||||
|
cx, cy + ry,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx - krx, cy + ry,
|
||||||
|
cx - rx, cy + kry,
|
||||||
|
cx - rx, cy,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx - rx, cy - kry,
|
||||||
|
cx - krx, cy - ry,
|
||||||
|
cx, cy - ry,
|
||||||
|
});
|
||||||
|
try writer.print("{d:.3} {d:.3} {d:.3} {d:.3} {d:.3} {d:.3} c\n", .{
|
||||||
|
cx + krx, cy - ry,
|
||||||
|
cx + rx, cy - kry,
|
||||||
|
cx + rx, cy,
|
||||||
|
});
|
||||||
|
try writer.writeAll("h\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "parseColor hex" {
|
||||||
|
const color = parseColor("#FF0000").?;
|
||||||
|
try std.testing.expectEqual(@as(u8, 255), color.r);
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), color.g);
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), color.b);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "parseColor named" {
|
||||||
|
const color = parseColor("blue").?;
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), color.r);
|
||||||
|
try std.testing.expectEqual(@as(u8, 0), color.g);
|
||||||
|
try std.testing.expectEqual(@as(u8, 255), color.b);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "parseNumber" {
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 100), parseNumber("100").?, 0.01);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 50), parseNumber("50px").?, 0.01);
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 12.5), parseNumber("12.5").?, 0.01);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "SvgParser basic" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var parser = SvgParser.init(allocator);
|
||||||
|
defer parser.deinit();
|
||||||
|
|
||||||
|
try parser.parse("<svg width=\"100\" height=\"100\"><rect x=\"10\" y=\"10\" width=\"80\" height=\"80\" fill=\"red\"/></svg>");
|
||||||
|
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 100), parser.width, 0.01);
|
||||||
|
try std.testing.expectEqual(@as(usize, 1), parser.elements.items.len);
|
||||||
|
try std.testing.expectEqual(ElementType.rect, parser.elements.items[0].element_type);
|
||||||
|
}
|
||||||
9
src/template/mod.zig
Normal file
9
src/template/mod.zig
Normal file
|
|
@ -0,0 +1,9 @@
|
||||||
|
//! Template module - Reusable document templates
|
||||||
|
//!
|
||||||
|
//! Provides a simple template system for creating reusable PDF layouts.
|
||||||
|
//! Templates can define placeholder regions that get filled with content.
|
||||||
|
|
||||||
|
pub const template = @import("template.zig");
|
||||||
|
pub const Template = template.Template;
|
||||||
|
pub const TemplateRegion = template.TemplateRegion;
|
||||||
|
pub const RegionType = template.RegionType;
|
||||||
304
src/template/template.zig
Normal file
304
src/template/template.zig
Normal file
|
|
@ -0,0 +1,304 @@
|
||||||
|
//! Template - Reusable PDF layout definitions
|
||||||
|
//!
|
||||||
|
//! A template defines named regions where content can be placed.
|
||||||
|
//! This enables creating consistent document layouts.
|
||||||
|
|
||||||
|
const std = @import("std");
|
||||||
|
|
||||||
|
/// A reusable PDF template
|
||||||
|
pub const Template = struct {
|
||||||
|
allocator: std.mem.Allocator,
|
||||||
|
|
||||||
|
/// Template name
|
||||||
|
name: []const u8,
|
||||||
|
|
||||||
|
/// Page dimensions
|
||||||
|
page_width: f32,
|
||||||
|
page_height: f32,
|
||||||
|
|
||||||
|
/// Named regions
|
||||||
|
regions: std.StringHashMapUnmanaged(TemplateRegion),
|
||||||
|
|
||||||
|
/// Fixed content (drawn on every page)
|
||||||
|
fixed_content: std.ArrayListUnmanaged(FixedContent),
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn init(allocator: std.mem.Allocator, name: []const u8, width: f32, height: f32) Self {
|
||||||
|
return .{
|
||||||
|
.allocator = allocator,
|
||||||
|
.name = name,
|
||||||
|
.page_width = width,
|
||||||
|
.page_height = height,
|
||||||
|
.regions = .{},
|
||||||
|
.fixed_content = .{},
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deinit(self: *Self) void {
|
||||||
|
self.regions.deinit(self.allocator);
|
||||||
|
self.fixed_content.deinit(self.allocator);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Define a region where content can be placed
|
||||||
|
pub fn defineRegion(self: *Self, name: []const u8, region: TemplateRegion) !void {
|
||||||
|
try self.regions.put(self.allocator, name, region);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Add fixed content that appears on every page
|
||||||
|
pub fn addFixedContent(self: *Self, content: FixedContent) !void {
|
||||||
|
try self.fixed_content.append(self.allocator, content);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Get a region by name
|
||||||
|
pub fn getRegion(self: *const Self, name: []const u8) ?TemplateRegion {
|
||||||
|
return self.regions.get(name);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Create standard invoice template
|
||||||
|
pub fn invoiceTemplate(allocator: std.mem.Allocator) !Self {
|
||||||
|
var tmpl = Self.init(allocator, "invoice", 595.28, 841.89); // A4
|
||||||
|
|
||||||
|
// Header region (logo, company info)
|
||||||
|
try tmpl.defineRegion("header", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 750,
|
||||||
|
.width = 495,
|
||||||
|
.height = 80,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Invoice info (number, date)
|
||||||
|
try tmpl.defineRegion("invoice_info", .{
|
||||||
|
.x = 350,
|
||||||
|
.y = 700,
|
||||||
|
.width = 195,
|
||||||
|
.height = 40,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Customer info
|
||||||
|
try tmpl.defineRegion("customer", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 650,
|
||||||
|
.width = 250,
|
||||||
|
.height = 80,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Line items table
|
||||||
|
try tmpl.defineRegion("items", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 350,
|
||||||
|
.width = 495,
|
||||||
|
.height = 280,
|
||||||
|
.region_type = .table,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Totals
|
||||||
|
try tmpl.defineRegion("totals", .{
|
||||||
|
.x = 350,
|
||||||
|
.y = 150,
|
||||||
|
.width = 195,
|
||||||
|
.height = 100,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Footer
|
||||||
|
try tmpl.defineRegion("footer", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 30,
|
||||||
|
.width = 495,
|
||||||
|
.height = 40,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
return tmpl;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Create standard letter template
|
||||||
|
pub fn letterTemplate(allocator: std.mem.Allocator) !Self {
|
||||||
|
var tmpl = Self.init(allocator, "letter", 595.28, 841.89); // A4
|
||||||
|
|
||||||
|
// Sender address
|
||||||
|
try tmpl.defineRegion("sender", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 780,
|
||||||
|
.width = 200,
|
||||||
|
.height = 60,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Recipient address
|
||||||
|
try tmpl.defineRegion("recipient", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 680,
|
||||||
|
.width = 200,
|
||||||
|
.height = 80,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Date
|
||||||
|
try tmpl.defineRegion("date", .{
|
||||||
|
.x = 400,
|
||||||
|
.y = 680,
|
||||||
|
.width = 145,
|
||||||
|
.height = 20,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Subject
|
||||||
|
try tmpl.defineRegion("subject", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 580,
|
||||||
|
.width = 495,
|
||||||
|
.height = 20,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Body
|
||||||
|
try tmpl.defineRegion("body", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 200,
|
||||||
|
.width = 495,
|
||||||
|
.height = 360,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
// Signature
|
||||||
|
try tmpl.defineRegion("signature", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 100,
|
||||||
|
.width = 200,
|
||||||
|
.height = 80,
|
||||||
|
.region_type = .text,
|
||||||
|
});
|
||||||
|
|
||||||
|
return tmpl;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// A region within a template
|
||||||
|
pub const TemplateRegion = struct {
|
||||||
|
/// Position and size
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
|
||||||
|
/// Type of content expected
|
||||||
|
region_type: RegionType = .text,
|
||||||
|
|
||||||
|
/// Default font (if text)
|
||||||
|
font_size: f32 = 12,
|
||||||
|
|
||||||
|
/// Padding inside region
|
||||||
|
padding: f32 = 0,
|
||||||
|
|
||||||
|
/// Background color (null = transparent)
|
||||||
|
bg_color: ?u32 = null,
|
||||||
|
|
||||||
|
/// Border width (0 = no border)
|
||||||
|
border_width: f32 = 0,
|
||||||
|
border_color: u32 = 0x000000,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Types of region content
|
||||||
|
pub const RegionType = enum {
|
||||||
|
text,
|
||||||
|
image,
|
||||||
|
table,
|
||||||
|
custom,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// Fixed content that appears on every page
|
||||||
|
pub const FixedContent = struct {
|
||||||
|
content_type: ContentType,
|
||||||
|
x: f32,
|
||||||
|
y: f32,
|
||||||
|
data: ContentData,
|
||||||
|
|
||||||
|
pub const ContentType = enum {
|
||||||
|
text,
|
||||||
|
line,
|
||||||
|
rect,
|
||||||
|
image,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const ContentData = union(ContentType) {
|
||||||
|
text: TextContent,
|
||||||
|
line: LineContent,
|
||||||
|
rect: RectContent,
|
||||||
|
image: ImageContent,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const TextContent = struct {
|
||||||
|
text: []const u8,
|
||||||
|
font_size: f32 = 12,
|
||||||
|
color: u32 = 0x000000,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const LineContent = struct {
|
||||||
|
x2: f32,
|
||||||
|
y2: f32,
|
||||||
|
width: f32 = 1,
|
||||||
|
color: u32 = 0x000000,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const RectContent = struct {
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
fill_color: ?u32 = null,
|
||||||
|
stroke_color: ?u32 = 0x000000,
|
||||||
|
stroke_width: f32 = 1,
|
||||||
|
};
|
||||||
|
|
||||||
|
pub const ImageContent = struct {
|
||||||
|
image_index: usize,
|
||||||
|
width: f32,
|
||||||
|
height: f32,
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
// =============================================================================
|
||||||
|
// Tests
|
||||||
|
// =============================================================================
|
||||||
|
|
||||||
|
test "Template init and deinit" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var tmpl = Template.init(allocator, "test", 595.28, 841.89);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
try tmpl.defineRegion("header", .{
|
||||||
|
.x = 50,
|
||||||
|
.y = 750,
|
||||||
|
.width = 495,
|
||||||
|
.height = 80,
|
||||||
|
});
|
||||||
|
|
||||||
|
const region = tmpl.getRegion("header").?;
|
||||||
|
try std.testing.expectApproxEqAbs(@as(f32, 50), region.x, 0.01);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Template invoice" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var tmpl = try Template.invoiceTemplate(allocator);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
try std.testing.expect(tmpl.getRegion("header") != null);
|
||||||
|
try std.testing.expect(tmpl.getRegion("items") != null);
|
||||||
|
try std.testing.expect(tmpl.getRegion("footer") != null);
|
||||||
|
}
|
||||||
|
|
||||||
|
test "Template letter" {
|
||||||
|
const allocator = std.testing.allocator;
|
||||||
|
|
||||||
|
var tmpl = try Template.letterTemplate(allocator);
|
||||||
|
defer tmpl.deinit();
|
||||||
|
|
||||||
|
try std.testing.expect(tmpl.getRegion("sender") != null);
|
||||||
|
try std.testing.expect(tmpl.getRegion("body") != null);
|
||||||
|
try std.testing.expect(tmpl.getRegion("signature") != null);
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue