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