image.createPixelMap的option中的pixelMapFormat没有按预期生效

@State showImage: Resource | image.PixelMap = $r(“app.media.holder”) 
 
Image(this.showImage) 
  .width(50) 
  .height(50) 
  .onClick(() => {this.showPixelMap()}) 
 
async showPixelMap() { 
  let pixelArray: number[] = []; 
  for(let i = 0; i < 50 * 50; i++) { 
    pixelArray.push(255, 0, 0, 255); 
  } 
  let pixelBuffer = pixelArray.buffer as Object as ArrayBuffer; 
  let opt: image.InitializationOptions = { 
    size: {width: 50, height:50}, 
    pixelFormat: image.PixelMapFormat.RGBA_8888, 
    editable: true; 
  } 
  this.showImage = await image.createPixelMap(pixelBuffer, opt); 
}