method getCanvasIndex

Source

static int getCanvasIndex(int bitmapDataChannel) {
  var isLittleEndianSystem = env.isLittleEndianSystem;
  if (bitmapDataChannel & BitmapDataChannel.RED != 0) return isLittleEndianSystem ? 0 : 3;
  if (bitmapDataChannel & BitmapDataChannel.GREEN != 0) return isLittleEndianSystem ? 1 : 2;
  if (bitmapDataChannel & BitmapDataChannel.BLUE != 0) return isLittleEndianSystem ? 2 : 1;
  if (bitmapDataChannel & BitmapDataChannel.ALPHA != 0) return isLittleEndianSystem ? 3 : 0;
  throw new ArgumentError("Invalid bitmapDataChannel");
}