Minor bug in Graphics.drawImage()

Hi!
I've just tried to write an image to my famous clock :) and found a bug with transparent color.

var image={ width:9 , height:13 , bpp:24 ,
  buffer:Uint24Array(
[
  0x0,0x1,0x2,0x4,0x8,0x10,0x20,0x40,0x80,
  0x0,0x100,0x200,0x400,0x800,0x1000,0x2000,0x4000,0x8000,
  0,0,0,0,0,0,0,0,0,
  0,0,0,0,0,0,0,0,0,
  0x0,0x10000,0x20000,0x40000,0x80000,0x100000,0x200000,0x400000,0x800000,
]),
  transparent: 0x1,
};
gt.drawImage(image, 5, 1);
neopixel.write(pin, gt.buffer);

I expect transparent point is in first image line (I can find it even if image is mirrored because there is second color line near) but it is actually in last one. If I set transparent to 0x10000 I see transparent point in first line while expect it in last one.