mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-09-09 09:51:34 -07:00
63 lines
1.6 KiB
Python
Executable File
63 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
from __future__ import print_function
|
|
|
|
import sys
|
|
from pokemontools import png
|
|
|
|
def rgb8_to_rgb5(c):
|
|
r, g, b = c
|
|
return (r // 8, g // 8, b // 8)
|
|
|
|
def rgb5_to_rgb8(c):
|
|
r, g, b = c
|
|
return ((r * 8) | (r // 4), (g * 8) | (g // 4), (b * 8) | (b // 4))
|
|
|
|
def invert(c):
|
|
r, g, b = c
|
|
return (31 - r, 31 - g, 31 - b)
|
|
|
|
def luminance(c):
|
|
r, g, b = c
|
|
return (0.299 * r**2 + 0.587 * g**2 + 0.114 * b**2)**0.5
|
|
|
|
def rgb5_pixels(row):
|
|
for x in range(0, len(row), 4):
|
|
yield rgb8_to_rgb5(row[x:x+3])
|
|
|
|
def fix_pal(filename):
|
|
with open(filename, 'rb') as file:
|
|
width, height, data = png.Reader(file).asRGBA8()[:3]
|
|
data = list(data)
|
|
b_and_w = {(0, 0, 0), (31, 31, 31)}
|
|
colors = set(c for row in data for c in rgb5_pixels(row)) - b_and_w
|
|
if not colors:
|
|
colors = {(20, 20, 20), (10, 10, 10)}
|
|
elif len(colors) == 1:
|
|
c = colors.pop()
|
|
colors = {c, invert(c)}
|
|
elif len(colors) != 2:
|
|
return False
|
|
palette = tuple(sorted(colors | b_and_w, key=luminance, reverse=True))
|
|
assert len(palette) == 4
|
|
data = [list(map(palette.index, rgb5_pixels(row))) for row in data]
|
|
palette = tuple(map(rgb5_to_rgb8, palette))
|
|
writer = png.Writer(width, height, palette=palette, compression=9)
|
|
with open(filename, 'wb') as file:
|
|
writer.write(file, data)
|
|
return True
|
|
|
|
def main():
|
|
if len(sys.argv) < 2:
|
|
print('Usage: %s pic.png' % sys.argv[0], file=sys.stderr)
|
|
sys.exit(1)
|
|
for filename in sys.argv[1:]:
|
|
if not filename.lower().endswith('.png'):
|
|
print(filename, 'is not a .png file!', file=sys.stderr)
|
|
elif not fix_pal(filename):
|
|
print(filename, 'has too many colors!', file=sys.stderr)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|