prawnpdf/prawn
Prawn
Prawn 是一个 Ruby 库和文档布局工具，用于以编程方式生成 PDF 文件。它作为一个矢量图形引擎，允许创建包含格式化文本、自定义形状和组织页面布局的便携式文档。
该库通过基于坐标的矢量渲染系统脱颖而出，支持多点渐变填充、复杂多边形和基于层的混合。它提供了一个全面的排版系统，能够嵌入 TrueType 和 OpenType 字体，以支持多语言出版的 UTF-8 字符和从右到左的文本。
广泛的功能包括具有分层大纲的文档结构管理、支持透明度的光栅图像嵌入以及交互式超链接的插入。该系统还包括用于文档加密和密码保护的安全功能。
Features
- PDF Generation Libraries - Offers a programmatic interface for creating and formatting professional PDF documents using Ruby.
- PDF Document Generation - Provides a programmatic interface for generating PDF files from scratch, including text, images, and vector layouts.
- Document Layout and Styling - Organizes content using a grid system with repeatable headers, footers, and page numbers.
- Document Layout Tools - Provides a comprehensive system for organizing page content with repeatable headers, footers, and grid-based layouts.
- Text Rendering Engines - Produces flowing text with inline formatting and supports a comprehensive typography system.
- Binary Document Stream Generators - Constructs PDF files by writing formatted text streams and binary data according to the PDF specification.
- Coordinate-Based Rendering - Implements a coordinate-based vector rendering system to map shapes and text to a fixed page grid.
- Vector Graphics Renderers - Renders lines, polygons, curves, and ellipses to create custom shapes and diagrams.
- PDF Image Embedding - Inserts raster PNG and JPG images into PDF documents using flexible scaling options.
- PDF Vector Graphics - Enables programmatic drawing of complex vector shapes, paths, and multi-stop gradients onto PDF pages.
- Document Object Models - Represents the PDF document as a hierarchical object tree that can be directly manipulated.
- PDF Font Embedding - Integrates TrueType and OpenType font glyphs directly into PDF files for consistent cross-platform rendering.
- PDF Font Embedding - Integrates TrueType and OpenType fonts into documents to ensure consistent typography across different viewers.
- Automated Report Generators - Generates structured reports with repeatable headers and footers for business or technical data summaries.
- Multilingual Rendering - Supports rendering UTF-8 characters and right-to-left text for international document publishing.
- Outline Management - Provides programmatic creation and modification of hierarchical document outlines and bookmarks.
- PDF Outline Generators - Generates clickable navigation menus and structured tables of contents for long documents.
- Multi-Stop Gradients - Supports filling shapes using a series of color stops positioned across a coordinate system.
- PDF Encryptions and Decryptions - Applies password-based encryption and security to PDF files to restrict unauthorized access.
- Blending Utilities - Controls how overlapping layers merge visually using standard blending operations.
- Geospatial Blending Modes - Provides blending utilities to control how overlapping graphical layers merge visually using transparency operations.
- Right-to-Left Script Rendering - Supports global languages by rendering UTF-8 characters and right-to-left text with fallback font support.
- Ruby Frameworks and Tools - PDF generation tool for Ruby.
- PDF Generation - Fast and nimble PDF generation library.
