import bitmaptools
import displayio
import _bmp16

if "/" in __file__:
    here = __file__.rsplit("/", 1)[0]
else:
    here = "."

c = displayio.Colorspace.BGR565

b1 = _bmp16.loadbmp16(here + "/minerva16.bmp")
b3 = displayio.Bitmap(320, 240, 65536)

for i in (
    0,
    1 / 64,
    3 / 64,
    3 / 32,
    3 / 16,
    0.5,
    1 - 3 / 16,
    1 - 3 / 32,
    1 - 3 / 64,
    1 - 1 / 64,
    1,
):
    bitmaptools.dither(b3, b1, c)
    _bmp16.writebmp16(f"dither-atkinson.bmp", b3)
    bitmaptools.dither(b3, b1, c, bitmaptools.DitherAlgorithm.FloydStenberg)
    _bmp16.writebmp16(f"dither-floydstenberg.bmp", b3)