Pillow/PIL/IcoImagePlugin.py

85 lines
1.8 KiB
Python
Raw Normal View History

2010-07-31 06:52:47 +04:00
#
# The Python Imaging Library.
# $Id$
#
# Windows Icon support for PIL
#
# Notes:
# uses BmpImagePlugin.py to read the bitmap data.
#
# History:
# 96-05-27 fl Created
#
# Copyright (c) Secret Labs AB 1997.
# Copyright (c) Fredrik Lundh 1996.
#
# See the README file for information on usage and redistribution.
#
__version__ = "0.1"
2013-03-07 20:20:28 +04:00
from PIL import Image, BmpImagePlugin, _binary
2010-07-31 06:52:47 +04:00
#
# --------------------------------------------------------------------
i8 = _binary.i8
i16 = _binary.i16le
i32 = _binary.i32le
2010-07-31 06:52:47 +04:00
def _accept(prefix):
return prefix[:4] == b"\0\0\1\0"
2010-07-31 06:52:47 +04:00
##
# Image plugin for Windows Icon files.
class IcoImageFile(BmpImagePlugin.BmpImageFile):
format = "ICO"
format_description = "Windows Icon"
def _open(self):
# check magic
s = self.fp.read(6)
if not _accept(s):
raise SyntaxError("not an ICO file")
2010-07-31 06:52:47 +04:00
# pick the largest icon in the file
2012-10-26 02:00:19 +04:00
m = b""
2010-07-31 06:52:47 +04:00
for i in range(i16(s[4:])):
s = self.fp.read(16)
if not m:
m = s
elif i8(s[0]) > i8(m[0]) and i8(s[1]) > i8(m[1]):
2010-07-31 06:52:47 +04:00
m = s
#print "width", i8(s[0])
#print "height", i8(s[1])
#print "colors", i8(s[2])
#print "reserved", i8(s[3])
2010-07-31 06:52:47 +04:00
#print "planes", i16(s[4:])
#print "bitcount", i16(s[6:])
#print "bytes", i32(s[8:])
#print "offset", i32(s[12:])
# load as bitmap
self._bitmap(i32(m[12:]))
# patch up the bitmap height
self.size = self.size[0], self.size[1]//2
2010-07-31 06:52:47 +04:00
d, e, o, a = self.tile[0]
self.tile[0] = d, (0,0)+self.size, o, a
return
#
# --------------------------------------------------------------------
Image.register_open("ICO", IcoImageFile, _accept)
Image.register_extension("ICO", ".ico")