1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
#
# The Python Imaging Library.
# $Id$
#
# XPM File handling
#
# History:
# 1996-12-29 fl Created
# 2001-02-17 fl Use 're' instead of 'regex' (Python 2.1) (0.7)
#
# Copyright (c) Secret Labs AB 1997-2001.
# Copyright (c) Fredrik Lundh 1996-2001.
#
# See the README file for information on usage and redistribution.
#
import re
from . import Image, ImageFile, ImagePalette
from ._binary import i8, o8
# __version__ is deprecated and will be removed in a future version. Use
# PIL.__version__ instead.
__version__ = "0.2"
# XPM header
xpm_head = re.compile(b'"([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*)')
def _accept(prefix):
return prefix[:9] == b"/* XPM */"
##
# Image plugin for X11 pixel maps.
class XpmImageFile(ImageFile.ImageFile):
format = "XPM"
format_description = "X11 Pixel Map"
def _open(self):
if not _accept(self.fp.read(9)):
raise SyntaxError("not an XPM file")
# skip forward to next string
while True:
s = self.fp.readline()
if not s:
raise SyntaxError("broken XPM file")
m = xpm_head.match(s)
if m:
break
self._size = int(m.group(1)), int(m.group(2))
pal = int(m.group(3))
bpp = int(m.group(4))
if pal > 256 or bpp != 1:
raise ValueError("cannot read this XPM file")
#
# load palette description
palette = [b"\0\0\0"] * 256
for i in range(pal):
s = self.fp.readline()
if s[-2:] == b"\r\n":
s = s[:-2]
elif s[-1:] in b"\r\n":
s = s[:-1]
c = i8(s[1])
s = s[2:-2].split()
for i in range(0, len(s), 2):
if s[i] == b"c":
# process colour key
rgb = s[i + 1]
if rgb == b"None":
self.info["transparency"] = c
elif rgb[0:1] == b"#":
# FIXME: handle colour names (see ImagePalette.py)
rgb = int(rgb[1:], 16)
palette[c] = (
o8((rgb >> 16) & 255) + o8((rgb >> 8) & 255) + o8(rgb & 255)
)
else:
# unknown colour
raise ValueError("cannot read this XPM file")
break
else:
# missing colour key
raise ValueError("cannot read this XPM file")
self.mode = "P"
self.palette = ImagePalette.raw("RGB", b"".join(palette))
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), ("P", 0, 1))]
def load_read(self, bytes):
#
# load all image data in one chunk
xsize, ysize = self.size
s = [None] * ysize
for i in range(ysize):
s[i] = self.fp.readline()[1 : xsize + 1].ljust(xsize)
return b"".join(s)
#
# Registry
Image.register_open(XpmImageFile.format, XpmImageFile, _accept)
Image.register_extension(XpmImageFile.format, ".xpm")
Image.register_mime(XpmImageFile.format, "image/xpm")
|
