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-rw-r--r--PIL/PpmImagePlugin.py131
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diff --git a/PIL/PpmImagePlugin.py b/PIL/PpmImagePlugin.py
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--- a/PIL/PpmImagePlugin.py
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-#
-# 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")