// Results for ThinkPad in MPixels/s:
//   852 (alpha 0) / 158 (alpha 0x80) / 401 (alpha 0xFF)

sclass BenchDrawingImageOnImageWithAlpha {
  int w = 1000, h = w;
  long nanos;
  settable int alphaValue = 0x80; // alpha 0 (draw nothing) and alpha 255 (draw opaque) are faster than other values
  
  run {
    int[] pixels = repIntAsArray(w*h, -1);
    var img = bufferedImageWithoutAlpha(w, h, pixels);
    pixels = repIntAsArray(w*h, alphaValue << 24);
    var img2 = bufferedImageWithAlpha(w, h, pixels);
    var g = graphics(img);
    nanos = benchFor5("draw " + nPixels(w*h), -> drawImage(g, img2));
    print("Fastest result for alpha " + alphaValue + ": Can draw " + n2(w*h*1000/nanos) + " MPixels/s");
  }
}

svoid benchDrawingImageOnImageWithAlpha() {
  new BenchDrawingImageOnImageWithAlpha().alphaValue(0).run();
  new BenchDrawingImageOnImageWithAlpha().alphaValue(0x80).run();
  new BenchDrawingImageOnImageWithAlpha().alphaValue(0xFF).run();
}