1 files changed, 104 insertions, 0 deletions
diff --git a/lib/Python/Lib/PIL/MspImagePlugin.py b/lib/Python/Lib/PIL/MspImagePlugin.py
new file mode 100644
index 000000000..4753be7cd
--- /dev/null
+++ b/lib/Python/Lib/PIL/MspImagePlugin.py
@@ -0,0 +1,104 @@
+#
+# The Python Imaging Library.
+# $Id$
+#
+# 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"
+
+from PIL import Image, ImageFile, _binary
+
+
+#
+# read MSP files
+
+i16 = _binary.i16le
+
+
+def _accept(prefix):
+    return prefix[:4] in [b"DanM", b"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 [b"DanM", b"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] == b"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)
+
+o16 = _binary.o16le
+
+
+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(b"Da"), i16(b"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")