如何在电子中将ImageData保存为PNG

function saveImageDataAsPNG(imageData, fileName) {
  // 创建一个新的Canvas元素
  var canvas = document.createElement('canvas');
  canvas.width = imageData.width;
  canvas.height = imageData.height;

  // 将ImageData绘制到Canvas上
  var context = canvas.getContext('2d');
  context.putImageData(imageData, 0, 0);

  // 将Canvas中的图像数据转换为DataURL
  var dataURL = canvas.toDataURL('image/png');

  // 将DataURL转换为Blob对象
  var binary = atob(dataURL.split(',')[1]);
  var array = [];
  for (var i = 0; i < binary.length; i++) {
    array.push(binary.charCodeAt(i));
  }
  var blob = new Blob([new Uint8Array(array)], { type: 'image/png' });

  // 创建一个a标签并设置其属性
  var link = document.createElement('a');
  link.href = URL.createObjectURL(blob);
  link.download = fileName;

  // 模拟点击a标签以触发文件下载
  link.click();
}