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-rw-r--r--PIL/ImImagePlugin.py335
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diff --git a/PIL/ImImagePlugin.py b/PIL/ImImagePlugin.py
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-#
-# The Python Imaging Library.
-# $Id: ImImagePlugin.py 2285 2005-02-07 23:52:14Z fredrik $
-#
-# IFUNC IM file handling for PIL
-#
-# history:
-# 1995-09-01 fl Created.
-# 1997-01-03 fl Save palette images
-# 1997-01-08 fl Added sequence support
-# 1997-01-23 fl Added P and RGB save support
-# 1997-05-31 fl Read floating point images
-# 1997-06-22 fl Save floating point images
-# 1997-08-27 fl Read and save 1-bit images
-# 1998-06-25 fl Added support for RGB+LUT images
-# 1998-07-02 fl Added support for YCC images
-# 1998-07-15 fl Renamed offset attribute to avoid name clash
-# 1998-12-29 fl Added I;16 support
-# 2001-02-17 fl Use 're' instead of 'regex' (Python 2.1) (0.7)
-# 2003-09-26 fl Added LA/PA support
-#
-# Copyright (c) 1997-2003 by Secret Labs AB.
-# Copyright (c) 1995-2001 by Fredrik Lundh.
-#
-# See the README file for information on usage and redistribution.
-#
-
-
-__version__ = "0.7"
-
-import re, string
-import Image, ImageFile, ImagePalette
-
-
-# --------------------------------------------------------------------
-# Standard tags
-
-COMMENT = "Comment"
-DATE = "Date"
-EQUIPMENT = "Digitalization equipment"
-FRAMES = "File size (no of images)"
-LUT = "Lut"
-NAME = "Name"
-SCALE = "Scale (x,y)"
-SIZE = "Image size (x*y)"
-MODE = "Image type"
-
-TAGS = { COMMENT:0, DATE:0, EQUIPMENT:0, FRAMES:0, LUT:0, NAME:0,
- SCALE:0, SIZE:0, MODE:0 }
-
-OPEN = {
- # ifunc93/p3cfunc formats
- "0 1 image": ("1", "1"),
- "L 1 image": ("1", "1"),
- "Greyscale image": ("L", "L"),
- "Grayscale image": ("L", "L"),
- "RGB image": ("RGB", "RGB;L"),
- "RLB image": ("RGB", "RLB"),
- "RYB image": ("RGB", "RLB"),
- "B1 image": ("1", "1"),
- "B2 image": ("P", "P;2"),
- "B4 image": ("P", "P;4"),
- "X 24 image": ("RGB", "RGB"),
- "L 32 S image": ("I", "I;32"),
- "L 32 F image": ("F", "F;32"),
- # old p3cfunc formats
- "RGB3 image": ("RGB", "RGB;T"),
- "RYB3 image": ("RGB", "RYB;T"),
- # extensions
- "LA image": ("LA", "LA;L"),
- "RGBA image": ("RGBA", "RGBA;L"),
- "RGBX image": ("RGBX", "RGBX;L"),
- "CMYK image": ("CMYK", "CMYK;L"),
- "YCC image": ("YCbCr", "YCbCr;L"),
-}
-
-# ifunc95 extensions
-for i in ["8", "8S", "16", "16S", "32", "32F"]:
- OPEN["L %s image" % i] = ("F", "F;%s" % i)
- OPEN["L*%s image" % i] = ("F", "F;%s" % i)
-for i in ["16", "16B"]:
- OPEN["L %s image" % i] = ("I;%s" % i, "I;%s" % i)
- OPEN["L*%s image" % i] = ("I;%s" % i, "I;%s" % i)
-for i in ["32S"]:
- OPEN["L %s image" % i] = ("I", "I;%s" % i)
- OPEN["L*%s image" % i] = ("I", "I;%s" % i)
-for i in range(2, 33):
- OPEN["L*%s image" % i] = ("F", "F;%s" % i)
-
-
-# --------------------------------------------------------------------
-# Read IM directory
-
-split = re.compile(r"^([A-Za-z][^:]*):[ \t]*(.*)[ \t]*$")
-
-def number(s):
- try:
- return int(s)
- except ValueError:
- return float(s)
-
-##
-# Image plugin for the IFUNC IM file format.
-
-class ImImageFile(ImageFile.ImageFile):
-
- format = "IM"
- format_description = "IFUNC Image Memory"
-
- def _open(self):
-
- # Quick rejection: if there's not an LF among the first
- # 100 bytes, this is (probably) not a text header.
-
- if not "\n" in self.fp.read(100):
- raise SyntaxError, "not an IM file"
- self.fp.seek(0)
-
- n = 0
-
- # Default values
- self.info[MODE] = "L"
- self.info[SIZE] = (512, 512)
- self.info[FRAMES] = 1
-
- self.rawmode = "L"
-
- while 1:
-
- s = self.fp.read(1)
-
- # Some versions of IFUNC uses \n\r instead of \r\n...
- if s == "\r":
- continue
-
- if not s or s[0] == chr(0) or s[0] == chr(26):
- break
-
- # FIXME: this may read whole file if not a text file
- s = s + self.fp.readline()
-
- if len(s) > 100:
- raise SyntaxError, "not an IM file"
-
- if s[-2:] == '\r\n':
- s = s[:-2]
- elif s[-1:] == '\n':
- s = s[:-1]
-
- try:
- m = split.match(s)
- except re.error, v:
- raise SyntaxError, "not an IM file"
-
- if m:
-
- k, v = m.group(1,2)
-
- # Convert value as appropriate
- if k in [FRAMES, SCALE, SIZE]:
- v = string.replace(v, "*", ",")
- v = tuple(map(number, string.split(v, ",")))
- if len(v) == 1:
- v = v[0]
- elif k == MODE and OPEN.has_key(v):
- v, self.rawmode = OPEN[v]
-
- # Add to dictionary. Note that COMMENT tags are
- # combined into a list of strings.
- if k == COMMENT:
- if self.info.has_key(k):
- self.info[k].append(v)
- else:
- self.info[k] = [v]
- else:
- self.info[k] = v
-
- if TAGS.has_key(k):
- n = n + 1
-
- else:
-
- raise SyntaxError, "Syntax error in IM header: " + s
-
- if not n:
- raise SyntaxError, "Not an IM file"
-
- # Basic attributes
- self.size = self.info[SIZE]
- self.mode = self.info[MODE]
-
- # Skip forward to start of image data
- while s and s[0] != chr(26):
- s = self.fp.read(1)
- if not s:
- raise SyntaxError, "File truncated"
-
- if self.info.has_key(LUT):
- # convert lookup table to palette or lut attribute
- palette = self.fp.read(768)
- greyscale = 1 # greyscale palette
- linear = 1 # linear greyscale palette
- for i in range(256):
- if palette[i] == palette[i+256] == palette[i+512]:
- if palette[i] != chr(i):
- linear = 0
- else:
- greyscale = 0
- if self.mode == "L" or self.mode == "LA":
- if greyscale:
- if not linear:
- self.lut = map(ord, palette[:256])
- else:
- if self.mode == "L":
- self.mode = self.rawmode = "P"
- elif self.mode == "LA":
- self.mode = self.rawmode = "PA"
- self.palette = ImagePalette.raw("RGB;L", palette)
- elif self.mode == "RGB":
- if not greyscale or not linear:
- self.lut = map(ord, palette)
-
- self.frame = 0
-
- self.__offset = offs = self.fp.tell()
-
- self.__fp = self.fp # FIXME: hack
-
- if self.rawmode[:2] == "F;":
-
- # ifunc95 formats
- try:
- # use bit decoder (if necessary)
- bits = int(self.rawmode[2:])
- if bits not in [8, 16, 32]:
- self.tile = [("bit", (0,0)+self.size, offs,
- (bits, 8, 3, 0, -1))]
- return
- except ValueError:
- pass
-
- if self.rawmode in ["RGB;T", "RYB;T"]:
- # Old LabEye/3PC files. Would be very surprised if anyone
- # ever stumbled upon such a file ;-)
- size = self.size[0] * self.size[1]
- self.tile = [("raw", (0,0)+self.size, offs, ("G", 0, -1)),
- ("raw", (0,0)+self.size, offs+size, ("R", 0, -1)),
- ("raw", (0,0)+self.size, offs+2*size, ("B", 0, -1))]
- else:
- # LabEye/IFUNC files
- self.tile = [("raw", (0,0)+self.size, offs, (self.rawmode, 0, -1))]
-
- def seek(self, frame):
-
- if frame < 0 or frame >= self.info[FRAMES]:
- raise EOFError, "seek outside sequence"
-
- if self.frame == frame:
- return
-
- self.frame = frame
-
- if self.mode == "1":
- bits = 1
- else:
- bits = 8 * len(self.mode)
-
- size = ((self.size[0] * bits + 7) / 8) * self.size[1]
- offs = self.__offset + frame * size
-
- self.fp = self.__fp
-
- self.tile = [("raw", (0,0)+self.size, offs, (self.rawmode, 0, -1))]
-
- def tell(self):
-
- return self.frame
-
-#
-# --------------------------------------------------------------------
-# Save IM files
-
-SAVE = {
- # mode: (im type, raw mode)
- "1": ("0 1", "1"),
- "L": ("Greyscale", "L"),
- "LA": ("LA", "LA;L"),
- "P": ("Greyscale", "P"),
- "PA": ("LA", "PA;L"),
- "I": ("L 32S", "I;32S"),
- "I;16": ("L 16", "I;16"),
- "I;16B": ("L 16B", "I;16B"),
- "F": ("L 32F", "F;32F"),
- "RGB": ("RGB", "RGB;L"),
- "RGBA": ("RGBA", "RGBA;L"),
- "RGBX": ("RGBX", "RGBX;L"),
- "CMYK": ("CMYK", "CMYK;L"),
- "YCbCr": ("YCC", "YCbCr;L")
-}
-
-def _save(im, fp, filename, check=0):
-
- try:
- type, rawmode = SAVE[im.mode]
- except KeyError:
- raise ValueError, "Cannot save %s images as IM" % im.mode
-
- try:
- frames = im.encoderinfo["frames"]
- except KeyError:
- frames = 1
-
- if check:
- return check
-
- fp.write("Image type: %s image\r\n" % type)
- if filename:
- fp.write("Name: %s\r\n" % filename)
- fp.write("Image size (x*y): %d*%d\r\n" % im.size)
- fp.write("File size (no of images): %d\r\n" % frames)
- if im.mode == "P":
- fp.write("Lut: 1\r\n")
- fp.write("\000" * (511-fp.tell()) + "\032")
- if im.mode == "P":
- fp.write(im.im.getpalette("RGB", "RGB;L")) # 768 bytes
- ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, 0, -1))])
-
-#
-# --------------------------------------------------------------------
-# Registry
-
-Image.register_open("IM", ImImageFile)
-Image.register_save("IM", _save)
-
-Image.register_extension("IM", ".im")
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