encodeImage method

@override List<int> encodeImage(Image image)

Encode a single image.

Implementation

@override
List<int> encodeImage(Image image) {
  final out = OutputBuffer(bigEndian: true);

  final header = List<int>.filled(18, 0);
  header[2] = 2;
  header[12] = image.width & 0xff;
  header[13] = (image.width >> 8) & 0xff;
  header[14] = image.height & 0xff;
  header[15] = (image.height >> 8) & 0xff;
  header[16] = image.channels == Channels.rgb ? 24 : 32;

  out.writeBytes(header);

  for (var y = image.height - 1; y >= 0; --y) {
    for (var x = 0; x < image.width; ++x) {
      final c = image.getPixel(x, y);
      out.writeByte(getBlue(c));
      out.writeByte(getGreen(c));
      out.writeByte(getRed(c));
      if (image.channels == Channels.rgba) {
        out.writeByte(getAlpha(c));
      }
    }
  }

  return out.getBytes();
}