72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
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#!/usr/bin/env python3
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# This script is just to view the icons
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def write_png(buf, width, height):
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import zlib
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import struct
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# reverse the vertical line order and add null bytes at the start
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width_byte_4 = width * 4
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raw_data = b"".join(b'\x00' + buf[span:span + width_byte_4] for span in range((height - 1) * width * 4, -1, - width_byte_4))
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def png_pack(png_tag, data):
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chunk_head = png_tag + data
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return struct.pack("!I", len(data)) + chunk_head + struct.pack("!I", 0xFFFFFFFF & zlib.crc32(chunk_head))
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return b"".join([
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b'\x89PNG\r\n\x1a\n',
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png_pack(b'IHDR', struct.pack("!2I5B", width, height, 8, 6, 0, 0, 0)),
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png_pack(b'IDAT', zlib.compress(raw_data, 9)),
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png_pack(b'IEND', b'')])
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def icondata_to_png(file_src, file_dst):
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import struct
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with open(file_src, 'rb') as f_src:
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# 2 ints
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temp_data = f_src.read(4 * 2)
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w, h = struct.unpack('<2I', temp_data)
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temp_data = f_src.read(4 * 2) # (x, y) - ignored
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temp_data = f_src.read(4 * 2) # (xfrom, yfrom) - ignored
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# pixels
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temp_data = f_src.read(w * h * 4)
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buf = write_png(temp_data, w, h)
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with open(file_dst, 'wb') as f_dst:
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f_dst.write(buf)
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def main():
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import sys
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import os
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for arg in sys.argv[1:]:
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file_src = arg
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file_dst = os.path.splitext(arg)[0] + ".png"
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icondata_to_png(file_src, file_dst)
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if __name__ == "__main__":
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main()
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