jung-kurt/gofpdfArchived
Gofpdf
This is a Go-based PDF library used for the programmatic generation of PDF documents without relying on external C dependencies. It functions as a document generator, layout engine, security tool, and vector graphics engine for creating files containing text, images, and geometric shapes.
The project distinguishes itself through a cell-based layout engine that manages automatic text wrapping, page breaks, and structured positioning. It provides specialized capabilities for vector graphics, including the rendering of Bézier curves and polygons, as well as a security toolkit for applying password protection and restricting printing or modification permissions.
The library covers a broad range of document capabilities, including font management for TrueType and OpenType fonts, image embedding with transparency support, and the creation of interactive elements like hyperlinks and bookmarks. It also handles data visualization for barcodes and charts, HTML subset rendering for text styling, and the management of optional content layers and reusable document templates.
Features
- PDF Document Generation - Programmatically generates binary PDF files from scratch to automate the production of reports and invoices.
- Cell-Based Layout Engines - Implements a cell-based layout engine to handle automatic text wrapping and structured positioning across pages.
- PDF Libraries - Provides a Go-based implementation for the programmatic generation and manipulation of PDF documents.
- Document Layout Tools - Provides tools for organizing pages with automatic text wrapping, headers, footers, and grid-based positioning.
- Paginated Document Layouts - Manages page formats, margins, orientation, and automatic page breaks with integrated headers and footers.
- PDF Layout Engines - Implements a system for managing page formats, margins, and cell-based text wrapping for structured documents.
- Coordinate-Based Graphic Rendering - Provides the ability to draw shapes and graphics using absolute page coordinates for precise placement.
- Text Rendering - Prints text using custom fonts with support for alignment, wrapping, superscripts, and subscripts.
- PDF Image Embedding - Inserts raster images and path-only SVG images with support for transparency and DPI scaling.
- PDF Vector Graphics - Draws precise lines, Bézier curves, and geometric shapes directly onto PDF pages.
- PDF Vector Graphics Engines - Implements a full toolkit for drawing Bézier curves, polygons, and shapes with customizable colors and gradients.
- PDF Security and Signing - Provides comprehensive capabilities for managing PDF password protection, permission settings, and digital signature application.
- Document Password Protection - Secures files with user and owner passwords to restrict printing, modifying, or copying of content.
- PDF Font Embedding - Imports standard and custom TrueType and OpenType fonts with support for UTF-8 and right-to-left languages.
- Document Templating - Enables the creation of reusable content blocks that can be instantiated and repeated across multiple pages.
- Password-Based Encryption - Secures documents using password-based encryption to restrict unauthorized viewing, printing, or modification.
- Coordinate Transformations - Applies transformation matrices to rotate, scale, or translate text and graphics relative to a coordinate point.
- Data Visualization Libraries - Generates barcodes, coordinate grids, and charts to visually represent quantitative data.
- Gradient Renderers - Defines RGB, CMYK, and spot colors along with linear or radial gradients for fills and strokes.
- PDF Interactive Elements - Supports the creation and insertion of interactive PDF components such as internal bookmarks, external hyperlinks, and file attachments.
- Programmatic Data Visualization - Automatically generates barcodes, coordinate grids, and mathematical plots to represent quantitative data.
- Page Hierarchies - Provides structural organization for documents through the management of pages, headers, footers, and outline bookmarks.
- PDF Font Embedding - Embeds TrueType and OpenType font glyphs directly into the PDF binary to ensure consistent rendering.
- HTML-to-PDF Text Stylers - Converts a subset of HTML tags for text styling, alignment, and hyperlinks into PDF document content.
- Template Engines - PDF document generator.
Star history
How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.
