91 lines
2.4 KiB
Python
Executable File
91 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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from PIL import Image
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import sys
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import struct
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import zlib
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def process_rgb(w, h, data):
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pix = bytearray(w * h * 3)
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for i in range(w * h):
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c = (data[i * 2] << 8) + data[i * 2 + 1]
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pix[i * 3 + 0] = (c & 0xF800) >> 8
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pix[i * 3 + 1] = (c & 0x07C0) >> 3
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pix[i * 3 + 2] = (c & 0x001F) << 3
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return bytes(pix)
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def process_grayscale(w, h, data):
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pix = bytearray(w * h)
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for i in range(w * h // 2):
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pix[i * 2 + 0] = data[i] & 0xF0
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pix[i * 2 + 1] = (data[i] & 0x0F) << 4
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return bytes(pix)
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def process_image(ifn, ofn):
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data = open(ifn, 'rb').read()
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if ifn.endswith('.toif'):
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if data[:4] != b'TOIf':
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print('Unknown TOIF header')
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return 1
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elif ifn.endswith('.toig'):
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if data[:4] != b'TOIg':
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print('Unknown TOIG header')
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return 2
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else:
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print('Unsupported format')
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return 3
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if ofn is None:
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ofn = '%s.png' % ifn[:-5]
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w, h = struct.unpack('<HH', data[4:8])
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print('Opened %s ... %d x %d' % (ifn, w, h))
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l = struct.unpack('<I', data[8:12])[0]
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data = data[12:]
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if len(data) != l:
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print('Compressed data length mismatch (%d vs %d)' % (len(data), l))
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return 4
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data = zlib.decompress(data, -10)
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if ifn.endswith('.toif'):
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if len(data) != w * h * 2:
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print('Uncompressed data length mismatch (%d vs %d)' %
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(len(data), w * h * 2))
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return 5
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pix = process_rgb(w, h, data)
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img = Image.frombuffer('RGB', (w, h), pix, 'raw', 'RGB', 0, 1)
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img.save(ofn)
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print('Written %s ...' % ofn)
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if ifn.endswith('.toig'):
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if len(data) != w * h // 2:
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print('Uncompressed data length mismatch (%d vs %d)' %
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(len(data), w * h // 2))
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return 6
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pix = process_grayscale(w, h, data)
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img = Image.frombuffer('L', (w, h), pix, 'raw', 'L', 0, 1)
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img.save(ofn)
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print('Written %s ...' % ofn)
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def main():
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if len(sys.argv) < 2:
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print('Usage: toi2png image.toi[fg] [output]')
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return 1
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ifn = sys.argv[1]
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if not ifn.endswith('.toif') and not ifn.endswith('.toig'):
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print('Must provide TOIF/TOIG file')
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return 2
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ofn = sys.argv[2] if len(sys.argv) > 2 else None
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process_image(ifn, ofn)
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main()
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