1 files changed, 131 insertions, 0 deletions
diff --git a/PIL/PpmImagePlugin.py b/PIL/PpmImagePlugin.py
new file mode 100644
index 0000000..b9b9f81
--- /dev/null
+++ b/PIL/PpmImagePlugin.py
@@ -0,0 +1,131 @@
+#
+# The Python Imaging Library.
+# $Id: PpmImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $
+#
+# PPM support for PIL
+#
+# History:
+#       96-03-24 fl     Created
+#       98-03-06 fl     Write RGBA images (as RGB, that is)
+#
+# Copyright (c) Secret Labs AB 1997-98.
+# Copyright (c) Fredrik Lundh 1996.
+#
+# See the README file for information on usage and redistribution.
+#
+
+
+__version__ = "0.2"
+
+import string
+
+import Image, ImageFile
+
+#
+# --------------------------------------------------------------------
+
+MODES = {
+    # standard
+    "P4": "1",
+    "P5": "L",
+    "P6": "RGB",
+    # extensions
+    "P0CMYK": "CMYK",
+    # PIL extensions (for test purposes only)
+    "PyP": "P",
+    "PyRGBA": "RGBA",
+    "PyCMYK": "CMYK"
+}
+
+def _accept(prefix):
+    return prefix[0] == "P" and prefix[1] in "0456y"
+
+##
+# Image plugin for PBM, PGM, and PPM images.
+
+class PpmImageFile(ImageFile.ImageFile):
+
+    format = "PPM"
+    format_description = "Pbmplus image"
+
+    def _token(self, s = ""):
+        while 1: # read until next whitespace
+            c = self.fp.read(1)
+            if not c or c in string.whitespace:
+                break
+            s = s + c
+        return s
+
+    def _open(self):
+
+        # check magic
+        s = self.fp.read(1)
+        if s != "P":
+            raise SyntaxError, "not a PPM file"
+        mode = MODES[self._token(s)]
+
+        if mode == "1":
+            self.mode = "1"
+            rawmode = "1;I"
+        else:
+            self.mode = rawmode = mode
+
+        for ix in range(3):
+            while 1:
+                while 1:
+                    s = self.fp.read(1)
+                    if s not in string.whitespace:
+                        break
+                if s != "#":
+                    break
+                s = self.fp.readline()
+            s = int(self._token(s))
+            if ix == 0:
+                xsize = s
+            elif ix == 1:
+                ysize = s
+                if mode == "1":
+                    break
+
+        self.size = xsize, ysize
+        self.tile = [("raw",
+                     (0, 0, xsize, ysize),
+                     self.fp.tell(),
+                     (rawmode, 0, 1))]
+
+        # ALTERNATIVE: load via builtin debug function
+        # self.im = Image.core.open_ppm(self.filename)
+        # self.mode = self.im.mode
+        # self.size = self.im.size
+
+#
+# --------------------------------------------------------------------
+
+def _save(im, fp, filename):
+    if im.mode == "1":
+        rawmode, head = "1;I", "P4"
+    elif im.mode == "L":
+        rawmode, head = "L", "P5"
+    elif im.mode == "RGB":
+        rawmode, head = "RGB", "P6"
+    elif im.mode == "RGBA":
+        rawmode, head = "RGB", "P6"
+    else:
+        raise IOError, "cannot write mode %s as PPM" % im.mode
+    fp.write(head + "\n%d %d\n" % im.size)
+    if head != "P4":
+        fp.write("255\n")
+    ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, 0, 1))])
+
+    # ALTERNATIVE: save via builtin debug function
+    # im._dump(filename)
+
+#
+# --------------------------------------------------------------------
+
+Image.register_open("PPM", PpmImageFile, _accept)
+Image.register_save("PPM", _save)
+
+Image.register_extension("PPM", ".pbm")
+Image.register_extension("PPM", ".pgm")
+Image.register_extension("PPM", ".ppm")