HarmonyOS 鸿蒙Next 如何将app.media.app_icon，转换为ImageBitmap

HarmonyOS 鸿蒙Next 如何将app.media.app_icon，转换为ImageBitmap 看了社区的一个帖子，只是把media下的文件转为PixelMap

想问一下大家，PixelMap如何再转为ImageBitmap呀？

我想实现通过Canvas来展示一张图片！代码如下：

import { image } from '@kit.ImageKit'

@Entry
@Component
struct Index {
  private settings: RenderingContextSettings = new RenderingContextSettings(true)
  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
  // private img: ImageBitmap = new ImageBitmap("image/main_nav_bg.jpg")

  private img_1?: PixelMap
  private img_2?: ImageBitmap

  aboutToAppear(): void {
    try {
      // 媒体文件字节数组
      getContext().resourceManager.getMediaContent($r('app.media.startIcon').id, (error, value:ArrayBuffer) => {
        let opts: image.InitializationOptions = {
          editable: true,
          pixelFormat: 3,
          size: { height: 300, width: 300 }
        }
        // 创建PixelMap
        image.createPixelMap(value, opts).then((pixelmap) => {
          // TODO 这个位置如何把PixelMap转换为ImageBitmap？？
        })
      });
    } catch (error) {
      console.error(`callback getMediaContent failed, error code: ${error.code}, message: ${error.message}.`)
    }
  }

  build() {
    Column() {
      Canvas(this.context)
        .width('100%')
        .height('50%')
        .backgroundColor(Color.Transparent)
        .onReady(() => {
          this.context.drawImage(this.img_2, 0, 0, 50, 60, 0, 0, 50, 60)
        })
    }
    .backgroundColor('#c0c0c0')
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Start)
  }
}