#鸿蒙通关秘籍# 如何使用PixelMap进行图片的深拷贝操作并保持性能优化？

 async function copyPixelMap(pm: PixelMap): Promise<PixelMap> {
     const imageInfo: image.ImageInfo = await pm.getImageInfo();
     const buffer: ArrayBuffer = new ArrayBuffer(pm.getPixelBytesNumber());
     // TODO 知识点：通过readPixelsToBuffer实现PixelMap的深拷贝，其中readPixelsToBuffer输出为BGRA_8888
     await pm.readPixelsToBuffer(buffer);
     // TODO 知识点：readPixelsToBuffer输出为BGRA_8888,此处createPixelMap需转为RGBA_8888
     const opts: image.InitializationOptions = {
       editable: true,
       pixelFormat: image.PixelMapFormat.RGBA_8888,
       size: { height: imageInfo.size.height, width: imageInfo.size.width }
     };
     return await image.createPixelMap(buffer, opts);
   }