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59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
#
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# Python Imaging Library
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# $Id$
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#
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# stuff to read GIMP palette files
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#
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# History:
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# 1997-08-23 fl Created
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# 2004-09-07 fl Support GIMP 2.0 palette files.
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#
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# Copyright (c) Secret Labs AB 1997-2004. All rights reserved.
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# Copyright (c) Fredrik Lundh 1997-2004.
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#
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# See the README file for information on usage and redistribution.
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#
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from __future__ import annotations
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import re
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from typing import IO
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from ._binary import o8
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class GimpPaletteFile:
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"""File handler for GIMP's palette format."""
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rawmode = "RGB"
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def __init__(self, fp: IO[bytes]) -> None:
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palette = [o8(i) * 3 for i in range(256)]
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if fp.readline()[:12] != b"GIMP Palette":
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msg = "not a GIMP palette file"
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raise SyntaxError(msg)
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for i in range(256):
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s = fp.readline()
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if not s:
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break
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# skip fields and comment lines
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if re.match(rb"\w+:|#", s):
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continue
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if len(s) > 100:
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msg = "bad palette file"
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raise SyntaxError(msg)
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v = tuple(map(int, s.split()[:3]))
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if len(v) != 3:
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msg = "bad palette entry"
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raise ValueError(msg)
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palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2])
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self.palette = b"".join(palette)
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def getpalette(self) -> tuple[bytes, str]:
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return self.palette, self.rawmode
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