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#!/bin/python3
import itertools
import io
from PIL import Image, ImageDraw
from consts import *
from shared import main
palette_img = Image.new('P', (1, 1))
palette_img.putpalette(list(itertools.chain.from_iterable([
*PICTOCHAT_PALETTE,
*[PICTOCHAT_PALETTE[0] for x in range(256 - len(PICTOCHAT_PALETTE))],
])))
def convert_chunk(img, offset):
palette_indices = []
for y in range(DS_TILE_SIZE):
for x in range(DS_TILE_SIZE):
palette_indices.append(img.getpixel((x + offset[0], y + offset[1])))
bytes = bytearray()
for i in range(0, len(palette_indices), 2):
bytes.append((palette_indices[i+0] << 0) | (palette_indices[i+1] << 4))
return bytes
def png2pc(data):
img = Image.open(io.BytesIO(data))
if img.width != TILES_HORIZONTAL * DS_TILE_SIZE:
print(f"error: input image is not {TILES_HORIZONTAL * DS_TILE_SIZE} pixels wide")
exit(1)
if img.height % DS_TILE_SIZE != 0:
print(f"error: input image height not a muliple of {DS_TILE_SIZE}")
exit(1)
tile_count = (img.width * img.height) // (DS_TILE_SIZE ** 2)
img = img.convert('RGB')
img = img.quantize(palette=palette_img)
draw = ImageDraw.Draw(img)
draw.rectangle(((0, 0), (24, img.height)), fill=0)
draw.rectangle(((252, 0), (256, img.height)), fill=0)
draw.rectangle(((24, 0), (79, 16)), fill=0)
output = b""
for tile_idx in range(tile_count):
tile = (
tile_idx % TILES_HORIZONTAL,
tile_idx // TILES_HORIZONTAL,
)
offset = (
tile[0] * DS_TILE_SIZE,
tile[1] * DS_TILE_SIZE,
)
output += convert_chunk(img, offset)
return output
if __name__ == "__main__":
main("png", "bin", png2pc)
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