DragonHD
46 lines
1.7 KiB
Python
46 lines
1.7 KiB
Python
"""Patch only U+3002 pixels in an existing CJK atlas; preserve its TGA bytes."""
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import argparse
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import json
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from pathlib import Path
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from build_cjk import lower_full_stop, tga_to_image, tga_geometry
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def patch_atlas(raw, metadata):
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image, desc = tga_to_image(raw)
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cell = metadata['cell']
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if list(image.size) != metadata['atlas']:
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raise ValueError('atlas geometry mismatch')
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entry = metadata['cells'][str(int.from_bytes('。'.encode('gb2312'), 'big'))]
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if entry['uni'] != '。':
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raise ValueError('full-stop cell mismatch')
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x, y = entry['x'], entry['y']
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tile = image.crop((x, y, x + cell, y + cell))
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fixed = lower_full_stop(tile)
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idlen, _, w, h, _, _ = tga_geometry(raw)
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result = bytearray(raw)
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for j in range(cell):
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row = y + j if desc & 0x20 else h - 1 - y - j
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for i in range(cell):
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offset = 18 + idlen + (row * w + x + i) * 4
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r, g, b, a = fixed.getpixel((i, j))
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result[offset:offset + 4] = bytes((b, g, r, a))
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return bytes(result)
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def main():
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p = argparse.ArgumentParser(description=__doc__)
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p.add_argument('--source', type=Path, required=True)
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p.add_argument('--cells', type=Path, required=True)
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p.add_argument('--out', type=Path, required=True)
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args = p.parse_args()
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if args.source.resolve() == args.out.resolve():
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p.error('output must differ from source')
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result = patch_atlas(args.source.read_bytes(), json.loads(args.cells.read_text(encoding='utf-8')))
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args.out.parent.mkdir(parents=True, exist_ok=True)
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args.out.write_bytes(result)
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print('Full stop anchored at cell bottom; other atlas bytes preserved.')
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if __name__ == '__main__':
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main()
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