存储canvas渲染的像素数据

属性

示例：

// xxx.ets
@Entry
@Component
struct Translate {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private img:ImageBitmap = new ImageBitmap("/common/images/1234.png")

build() {
  Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
    Canvas(this.context)
      .width('100%')
      .height('100%')
      .backgroundColor('#ffff00')
      .onReady(() =>{
        this.context.drawImage(this.img,0,0,130,130)
        var imagedata = this.context.getImageData(50,50,130,130)
        this.context.putImageData(imagedata,150,150)
      })
  }
  .width('100%')
  .height('100%')
}
}