HarmonyOS 自定义组件是否可以转换成PixelMap

import componentSnapshot from '@ohos.ArkUI.componentSnapshot' 
import image from '@ohos.multimedia.image' 
@Entry 
@Component 
struct waterMarkPage { 
  @State pixmap: image.PixelMap | undefined = undefined 
  build() { 
    Column() { 
      Stack({ alignContent: Alignment.Center }){ 
        Image($r('app.media.ic_product02')).autoResize(true).width(300).height(300) 
        Row() { 
          Text("水印").width(40).height(20).fontSize(16).fontColor(Color.White) 
            .border({ color: Color.Red, width: 1 }).borderRadius(4) 
            .margin({top:10,right:10}) 
        } 
        .width(300).height(300) 
        .alignItems(VerticalAlign.Top) 
        .justifyContent(FlexAlign.End) 
        Row() { 
          Image($r('app.media.startIcon')).autoResize(true).width(40).height(40).margin({bottom:10,right:10}) 
        } 
        .width(300).height(300) 
        .alignItems(VerticalAlign.Bottom) 
        .justifyContent(FlexAlign.End) 
      } 
      .id("root") 
      Button("生成水印图片") 
        .onClick(() => { 
          componentSnapshot.get("root") 
            .then((pixmap: image.PixelMap) => { 
              this.pixmap = pixmap 
            }).catch((err:Error) => { 
            console.log("error: " + err) 
          }) 
        }).margin(10) 
      Image(this.pixmap).width(300).height(300).border({ color: Color.Blue, width: 1 }).margin(5) 
    } 
    .width('100%') 
    .height('100%') 
    .alignItems(HorizontalAlign.Center) 
  } 
}