Brooooooklyn/canvas
Canvas
Canvas is a headless vector graphics engine and two-dimensional graphics rendering library built on a native graphics library with zero system dependencies for server-side drawing. It provides a programmatic shape construction and manipulation library supporting bezier curves, boolean operations, and native rendering without requiring a display server.
The library renders shapes, paths, text, and images onto virtual memory surfaces and off-screen drawing areas for server-side image generation, vector animation rendering, and PDF generation. It supports path boolean operations to compute complex geometric intersections, unions, and differences of vector shapes, alongside bytecode-level asset embedding for fonts, images, and external media.
Additional capabilities include surface resizing, transformation, and exporting drawing surfaces into various image formats for backend processing. All required native graphics libraries are bundled directly into the binary distribution to eliminate external system library requirements.
Features
- High Performance Rendering - Renders shapes, paths, text, and images onto a two-dimensional drawing surface using a high-performance graphics engine.
- 2D Vector Graphics Libraries - Provides a standard graphics context to draw shapes, text, and images onto a virtual surface programmatically.
- Boolean Path Operations - Computes complex geometric intersections, unions, and differences of vector shapes using dedicated polygon clipping algorithms.
- Headless Vector Engines - Provides a headless vector graphics engine that programs drawing surfaces and exports images without a display server.
- Vector Graphics Renderers - Renders two-dimensional vector graphics directly through a high-performance compiled graphics library without relying on host operating system graphics APIs.
- HTML5 Canvas Libraries - Delivers a high-performance two-dimensional graphics rendering library built on native graphics with zero system dependencies.
- Off-Screen Rendering - Draws shapes, text, and images onto virtual memory surfaces for high-performance background image processing.
- Vector Graphics Libraries - Offers a programmatic shape construction and manipulation library supporting bezier curves and boolean operations.
- Vector Path Construction - Supports constructing and transforming complex vector shapes using quadratic and cubic beziers, conics, and winding rules.
- Vector Shape Construction - Constructs, transforms, and manipulates complex vector shapes and paths with boolean operations for custom pipelines.
- Zero-Dependency Binary Distributions - Bundles all required native graphics libraries directly into the binary distribution to eliminate external system library requirements.
- Canvas Exporters - Enables resizing, transforming, and exporting drawing surfaces into various image formats for server-side processing.
- Server-Side Rendering Architectures - Maintains virtual off-screen drawing surfaces in memory to process graphics commands headlessly in server environments.
- Media Asset Embedding - Embeds fonts, images, and external media directly into the rendering pipeline for self-contained vector execution.
- Server-Side Image Generators - Creates and exports images programmatically on a server without needing a physical screen or browser window installed.
- Server-Side PDF Rendering - Generates printable documents and graphical reports programmatically on a backend server for direct download.
