Automattic/node-canvas

Features

• Server-Side Image Generators - Provides a server-side implementation of the Canvas API to generate dynamic images and graphics within Node.js.
• 2D Primitive Rendering - Provides 2D rendering primitives for drawing rectangles, lines, and paths with custom styles.
• 2D Vector Graphics Libraries - Provides a comprehensive toolset for drawing shapes, text, and paths with vector output support.
• Canvas Exporters - Exports visual canvas content to files or streams in PNG, JPEG, PDF, and SVG formats.
• Vector Graphics Renderers - Uses the Cairo graphics library as its primary native engine to render vector graphics and perform rasterization.
• Text Rendering - Renders text strings onto the canvas with configurable fonts and precise measurement metrics.
• Graphics Rendering Engines - Integrates a native rendering engine that provides high-quality anti-aliasing and transformations.
• HTML5 Canvas Libraries - Implements the HTML5 Canvas API on the server side for Node.js using the Cairo rendering engine.
• Image File Loading - Supports importing image assets from local paths, buffers, data URIs, and remote URLs into memory.
• Image Graphics Rendering - Provides capabilities to draw external images and buffers onto a canvas surface.
• Node.js Image Processing - Offers image processing capabilities for the Node.js runtime, including pixel manipulation and format export.
• Node.js Native Addons - Implements high-performance graphics processing by binding JavaScript calls to native C++ implementations.
• Font Registrations - Allows programmatic registration and deregistration of custom typefaces for server-side text rendering.
• System Font Integration - Integrates with system font libraries to load and manage native typefaces.
• Low-Level Pixel Buffer Access - Allows direct access to contiguous memory buffers for high-performance raw pixel manipulation.
• PDF Document Generation - Enables the programmatic generation of multi-page PDF documents with custom layouts and vector graphics.
• Pixel-Buffer Memory Mapping - Maps raw image data to contiguous memory buffers for direct pixel manipulation and high-speed exports.
• Fill and Stroke Styles - Enables applying colors, gradients, patterns, and shadows to fill and stroke vector shapes.
• Programmatic SVG Generation - Generates resolution-independent scalable vector graphics files programmatically from code.
• Advanced Typography Rendering - Renders text using custom fonts and advanced typographic controls for high-fidelity branded content.
• Rendering Quality Settings - Provides configuration options for anti-aliasing and transformation smoothness to balance fidelity and performance.
• In-Memory Image Buffers - Decodes external images into in-memory pixel buffers for high-performance rendering on the canvas surface.
• Vector Output Formats - Generates content in SVG or PDF formats using specialized native backends.
• SVG Document Exporters - Produces scalable vector graphics documents by specifying the SVG canvas type.
• Text Typography Controls - Canvas node typography management for controlling language codes, bidirectional directionality, and text alignment.
• 2D and 3D Element Transformations - Implements 2D spatial transformations including scaling, rotation, and matrix applications for canvas elements.
• Custom Font Registrars - Maps typeface identifiers to native rendering glyphs by integrating with system and custom font libraries.
• Canvas and Graphics - Cairo-backed Canvas implementation for Node.js.

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