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1# 

2# Python Imaging Library 

3# $Id$ 

4# 

5# stuff to read GIMP palette files 

6# 

7# History: 

8# 1997-08-23 fl Created 

9# 2004-09-07 fl Support GIMP 2.0 palette files. 

10# 

11# Copyright (c) Secret Labs AB 1997-2004. All rights reserved. 

12# Copyright (c) Fredrik Lundh 1997-2004. 

13# 

14# See the README file for information on usage and redistribution. 

15# 

16 

17import re 

18 

19from ._binary import o8 

20 

21 

22class GimpPaletteFile: 

23 """File handler for GIMP's palette format.""" 

24 

25 rawmode = "RGB" 

26 

27 def __init__(self, fp): 

28 

29 self.palette = [o8(i) * 3 for i in range(256)] 

30 

31 if fp.readline()[:12] != b"GIMP Palette": 

32 raise SyntaxError("not a GIMP palette file") 

33 

34 for i in range(256): 

35 

36 s = fp.readline() 

37 if not s: 

38 break 

39 

40 # skip fields and comment lines 

41 if re.match(rb"\w+:|#", s): 

42 continue 

43 if len(s) > 100: 

44 raise SyntaxError("bad palette file") 

45 

46 v = tuple(map(int, s.split()[:3])) 

47 if len(v) != 3: 

48 raise ValueError("bad palette entry") 

49 

50 self.palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2]) 

51 

52 self.palette = b"".join(self.palette) 

53 

54 def getpalette(self): 

55 

56 return self.palette, self.rawmode