mirror of
https://github.com/irmen/prog8.git
synced 2024-12-24 16:29:21 +00:00
35 lines
956 B
Python
35 lines
956 B
Python
#!/usr/bin/env python
|
|
|
|
from PIL import Image
|
|
|
|
|
|
def make_cx16_palette(palette: list[int]) -> bytes:
|
|
def to4bit(color: int) -> int:
|
|
return (color * 15 + 135) >> 8 # see https://threadlocalmutex.com/?p=48
|
|
cx16palette = bytearray()
|
|
for pi in range(0, len(palette), 3):
|
|
r = to4bit(palette[pi])
|
|
g = to4bit(palette[pi+1])
|
|
b = to4bit(palette[pi+2])
|
|
cx16palette.append(g << 4 | b)
|
|
cx16palette.append(r)
|
|
return cx16palette
|
|
|
|
|
|
img = Image.open("dragonsprite.png")
|
|
assert img.size == (64, 128) and img.mode == 'P'
|
|
|
|
data = bytearray()
|
|
for y in range(0, 128):
|
|
for x in range(0, 64, 2):
|
|
pix1 = img.getpixel((x, y))
|
|
pix2 = img.getpixel((x + 1, y))
|
|
data.append(pix1 << 4 | pix2)
|
|
|
|
palette = make_cx16_palette(img.getpalette())
|
|
|
|
assert len(data) == 64 * 128 / 2
|
|
assert len(palette) <= 16*2
|
|
open("DRAGONSPRITE.PAL", "wb").write(palette)
|
|
open("DRAGONSPRITE.BIN", "wb").write(data)
|