Flipboard/react-canvas
React Canvas
react-canvas is a library for drawing user interface elements to a hardware-accelerated canvas instead of the standard document tree. It provides a system for rendering components to a canvas to improve rendering speed and frame rates.
The project includes a layer manager to organize visual elements and cache expensive drawing operations. It features a text engine capable of rendering multi-line text with precise character metric measurements and truncation, as well as a virtualized list system that processes only visible items to maintain smooth scrolling.
Interaction is handled through a canvas event handler that maps native coordinates back to virtual components, simulating standard event behavior to trigger application responses.
Features
- Canvas Rendering Engines - Provides a rendering engine that translates component trees into pixel-based images on a hardware-accelerated canvas.
- Canvas Rendering - A library for drawing high-performance user interface elements directly to a hardware-accelerated canvas.
- Event Simulation Systems - Captures user interactions on canvas elements using a standard event model to trigger application responses.
- Canvas Rendering Pipelines - Renders high-performance UI components directly to a hardware-accelerated canvas pipeline.
- Canvas Interaction Mapping - Implements a system to map native canvas coordinates back to virtual components to simulate standard event behavior.
- Canvas Coordinate Handlers - Provides an interaction model that captures user events on canvas-rendered components.
- Coordinate-to-Component Mapping - Maps native canvas interaction coordinates back to individual virtual components to simulate DOM event behavior.
- Drawing Layers - Uses a layer manager to organize visual elements and cache expensive drawing operations to reduce redraws.
- Canvas Text Layout Engines - Uses a specialized text layout engine to handle multi-line rendering and precise character measurements on canvas.
- Layered Canvas Composition - Organizes visual elements using containers that handle stacking order and caching of drawing operations.
- Segmented Canvas Rendering - Implements a virtualized rendering system to process only visible items for smooth scrolling on a canvas.
- Text Dimension Calculators - Calculates precise character dimensions and metrics to handle manual text wrapping and truncation on canvas.
- Virtualized List Rendering - Employs a high-performance rendering technique that displays only the visible subset of items in a column.
- Virtualized Lists - Processes only items currently visible in the viewport to maintain smooth scrolling and low memory usage.
- Canvas Libraries - High-performance rendering for React components.
