【鸿蒙】【毛豆工具集】【图片】【存储】将image.PixelMap对像存沙盒文件

在研发过程中，会用到将image.PixelMap对象存储到本机沙盒文件的需求，下面代码可实现将image.PixelMap对像存沙盒文件

export async function pixelMapSaveToSandBoxFile(pixelMap: image.PixelMap, pngPath: string): Promise<void> {
  let fd: number | null = null;
  const imagePacker = image.createImagePacker();
  const imageBuffer = await imagePacker.packToData(pixelMap, {
    format: 'image/png',
    quality: 100
  });
  const mode = fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE;
  fd = fileIo.openSync(pngPath, mode).fd;
  fileIo.truncateSync(fd);
  fileIo.writeSync(fd, imageBuffer);
  fileIo.close(fd);
}

代码使用示例

pixelMapSaveToSandBoxFile(this.pixelMap)