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A G plugin of renderer implementation with Canvas2D API





使用 CanvasRenderingContext2D 绘制各类图形。


  1. CanvasRendererPlugin 实现了以下 hook:

    1. beginFrame 保存上下文,如果开启了脏矩形渲染,创建脏矩形对应的 clip rect 并擦除
    2. renderFrame 绘制各个图形,如果开启了脏矩形渲染,仅在该区域内重绘
    3. endFrame 恢复上下文
  2. LoadImagePlugin 负责加载图片,实现了以下 hook:

    1. mounted Image 图形首次进入画布,异步加载包含的图片
    2. attributeChanged 如果 Image 图形的图片地址发生改变,重新加载图片