grayToRgba static method

Uint8List grayToRgba(UGrayImage image)

Packs a grayscale buffer into ARGB pixels, ready for decodeImageFromPixels.

Implementation

static Uint8List grayToRgba(UGrayImage image) {
  final Uint8List out = Uint8List(image.width * image.height * 4);
  for (int y = 0; y < image.height; y++) {
    final int source = y * image.stride;
    final int destination = y * image.width * 4;
    for (int x = 0; x < image.width; x++) {
      final int value = image.data[source + x];
      out[destination + x * 4] = value;
      out[destination + x * 4 + 1] = value;
      out[destination + x * 4 + 2] = value;
      out[destination + x * 4 + 3] = 255;
    }
  }
  return out;
}