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author | Keshav Sharma <keshav7890@gmail.com> | 2011-07-03 11:22:14 (GMT) |
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committer | Keshav Sharma <keshav7890@gmail.com> | 2011-07-03 11:22:14 (GMT) |
commit | ca10d560496dc9f6edde8b422fe591c96c175a6d (patch) | |
tree | 5efdf45be57028217d8f742651301ec234824401 /PIL/MspImagePlugin.py |
added activity folder
Diffstat (limited to 'PIL/MspImagePlugin.py')
-rw-r--r-- | PIL/MspImagePlugin.py | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/PIL/MspImagePlugin.py b/PIL/MspImagePlugin.py new file mode 100644 index 0000000..40aac19 --- /dev/null +++ b/PIL/MspImagePlugin.py @@ -0,0 +1,103 @@ +# +# The Python Imaging Library. +# $Id: MspImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $ +# +# MSP file handling +# +# This is the format used by the Paint program in Windows 1 and 2. +# +# History: +# 95-09-05 fl Created +# 97-01-03 fl Read/write MSP images +# +# Copyright (c) Secret Labs AB 1997. +# Copyright (c) Fredrik Lundh 1995-97. +# +# See the README file for information on usage and redistribution. +# + + +__version__ = "0.1" + +import Image, ImageFile + + +# +# read MSP files + +def i16(c): + return ord(c[0]) + (ord(c[1])<<8) + +def _accept(prefix): + return prefix[:4] in ["DanM", "LinS"] + +## +# Image plugin for Windows MSP images. This plugin supports both +# uncompressed (Windows 1.0). + +class MspImageFile(ImageFile.ImageFile): + + format = "MSP" + format_description = "Windows Paint" + + def _open(self): + + # Header + s = self.fp.read(32) + if s[:4] not in ["DanM", "LinS"]: + raise SyntaxError, "not an MSP file" + + # Header checksum + sum = 0 + for i in range(0, 32, 2): + sum = sum ^ i16(s[i:i+2]) + if sum != 0: + raise SyntaxError, "bad MSP checksum" + + self.mode = "1" + self.size = i16(s[4:]), i16(s[6:]) + + if s[:4] == "DanM": + self.tile = [("raw", (0,0)+self.size, 32, ("1", 0, 1))] + else: + self.tile = [("msp", (0,0)+self.size, 32+2*self.size[1], None)] + +# +# write MSP files (uncompressed only) + +def o16(i): + return chr(i&255) + chr(i>>8&255) + +def _save(im, fp, filename): + + if im.mode != "1": + raise IOError, "cannot write mode %s as MSP" % im.mode + + # create MSP header + header = [0] * 16 + + header[0], header[1] = i16("Da"), i16("nM") # version 1 + header[2], header[3] = im.size + header[4], header[5] = 1, 1 + header[6], header[7] = 1, 1 + header[8], header[9] = im.size + + sum = 0 + for h in header: + sum = sum ^ h + header[12] = sum # FIXME: is this the right field? + + # header + for h in header: + fp.write(o16(h)) + + # image body + ImageFile._save(im, fp, [("raw", (0,0)+im.size, 32, ("1", 0, 1))]) + +# +# registry + +Image.register_open("MSP", MspImageFile, _accept) +Image.register_save("MSP", _save) + +Image.register_extension("MSP", ".msp") |