PIL.CurImagePlugin 源代码

#
# The Python Imaging Library.
# $Id$
#
# Windows Cursor 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.
#


from PIL import Image, BmpImagePlugin, _binary

__version__ = "0.1"

#
# --------------------------------------------------------------------

i8 = _binary.i8
i16 = _binary.i16le
i32 = _binary.i32le


def _accept(prefix):
    return prefix[:4] == b"\0\0\2\0"


##
# Image plugin for Windows Cursor files.

[文档]class CurImageFile(BmpImagePlugin.BmpImageFile): format = "CUR" format_description = "Windows Cursor" def _open(self): offset = self.fp.tell() # check magic s = self.fp.read(6) if not _accept(s): raise SyntaxError("not a CUR file") # pick the largest cursor in the file m = b"" 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]): m = s # print "width", i8(s[0]) # print "height", i8(s[1]) # print "colors", i8(s[2]) # print "reserved", i8(s[3]) # print "hotspot x", i16(s[4:]) # print "hotspot y", i16(s[6:]) # print "bytes", i32(s[8:]) # print "offset", i32(s[12:]) if not m: raise TypeError("No cursors were found") # load as bitmap self._bitmap(i32(m[12:]) + offset) # patch up the bitmap height self.size = self.size[0], self.size[1]//2 d, e, o, a = self.tile[0] self.tile[0] = d, (0, 0)+self.size, o, a return
# # -------------------------------------------------------------------- Image.register_open(CurImageFile.format, CurImageFile, _accept) Image.register_extension(CurImageFile.format, ".cur")