2010-07-31 06:52:47 +04:00
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#
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# The Python Imaging Library.
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# $Id$
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#
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# PCD file handling
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#
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# History:
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# 96-05-10 fl Created
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# 96-05-27 fl Added draft mode (128x192, 256x384)
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#
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# Copyright (c) Secret Labs AB 1997.
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# Copyright (c) Fredrik Lundh 1996.
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#
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# See the README file for information on usage and redistribution.
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#
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__version__ = "0.1"
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2013-03-07 20:20:28 +04:00
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from PIL import Image, ImageFile, _binary
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py3k: The big push
There are two main issues fixed with this commit:
* bytes vs. str: All file, image, and palette data are now handled as
bytes. A new _binary module consolidates the hacks needed to do this
across Python versions. tostring/fromstring methods have been renamed to
tobytes/frombytes, but the Python 2.6/2.7 versions alias them to the old
names for compatibility. Users should move to tobytes/frombytes.
One other potentially-breaking change is that text data in image files
(such as tags, comments) are now explicitly handled with a specific
character encoding in mind. This works well with the Unicode str in
Python 3, but may trip up old code expecting a straight byte-for-byte
translation to a Python string. This also required a change to Gohlke's
tags tests (in Tests/test_file_png.py) to expect Unicode strings from
the code.
* True div vs. floor div: Many division operations used the "/" operator
to do floor division, which is now the "//" operator in Python 3. These
were fixed.
As of this commit, on the first pass, I have one failing test (improper
handling of a slice object in a C module, test_imagepath.py) in Python 3,
and three that that I haven't tried running yet (test_imagegl,
test_imagegrab, and test_imageqt). I also haven't tested anything on
Windows. All but the three skipped tests run flawlessly against Pythons
2.6 and 2.7.
2012-10-21 01:01:53 +04:00
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i8 = _binary.i8
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2010-07-31 06:52:47 +04:00
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##
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# Image plugin for PhotoCD images. This plugin only reads the 768x512
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# image from the file; higher resolutions are encoded in a proprietary
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# encoding.
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class PcdImageFile(ImageFile.ImageFile):
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format = "PCD"
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format_description = "Kodak PhotoCD"
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def _open(self):
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# rough
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self.fp.seek(2048)
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s = self.fp.read(2048)
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py3k: The big push
There are two main issues fixed with this commit:
* bytes vs. str: All file, image, and palette data are now handled as
bytes. A new _binary module consolidates the hacks needed to do this
across Python versions. tostring/fromstring methods have been renamed to
tobytes/frombytes, but the Python 2.6/2.7 versions alias them to the old
names for compatibility. Users should move to tobytes/frombytes.
One other potentially-breaking change is that text data in image files
(such as tags, comments) are now explicitly handled with a specific
character encoding in mind. This works well with the Unicode str in
Python 3, but may trip up old code expecting a straight byte-for-byte
translation to a Python string. This also required a change to Gohlke's
tags tests (in Tests/test_file_png.py) to expect Unicode strings from
the code.
* True div vs. floor div: Many division operations used the "/" operator
to do floor division, which is now the "//" operator in Python 3. These
were fixed.
As of this commit, on the first pass, I have one failing test (improper
handling of a slice object in a C module, test_imagepath.py) in Python 3,
and three that that I haven't tried running yet (test_imagegl,
test_imagegrab, and test_imageqt). I also haven't tested anything on
Windows. All but the three skipped tests run flawlessly against Pythons
2.6 and 2.7.
2012-10-21 01:01:53 +04:00
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if s[:4] != b"PCD_":
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2012-10-11 07:52:53 +04:00
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raise SyntaxError("not a PCD file")
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2010-07-31 06:52:47 +04:00
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py3k: The big push
There are two main issues fixed with this commit:
* bytes vs. str: All file, image, and palette data are now handled as
bytes. A new _binary module consolidates the hacks needed to do this
across Python versions. tostring/fromstring methods have been renamed to
tobytes/frombytes, but the Python 2.6/2.7 versions alias them to the old
names for compatibility. Users should move to tobytes/frombytes.
One other potentially-breaking change is that text data in image files
(such as tags, comments) are now explicitly handled with a specific
character encoding in mind. This works well with the Unicode str in
Python 3, but may trip up old code expecting a straight byte-for-byte
translation to a Python string. This also required a change to Gohlke's
tags tests (in Tests/test_file_png.py) to expect Unicode strings from
the code.
* True div vs. floor div: Many division operations used the "/" operator
to do floor division, which is now the "//" operator in Python 3. These
were fixed.
As of this commit, on the first pass, I have one failing test (improper
handling of a slice object in a C module, test_imagepath.py) in Python 3,
and three that that I haven't tried running yet (test_imagegl,
test_imagegrab, and test_imageqt). I also haven't tested anything on
Windows. All but the three skipped tests run flawlessly against Pythons
2.6 and 2.7.
2012-10-21 01:01:53 +04:00
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orientation = i8(s[1538]) & 3
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2010-07-31 06:52:47 +04:00
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if orientation == 1:
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self.tile_post_rotate = 90 # hack
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elif orientation == 3:
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self.tile_post_rotate = -90
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self.mode = "RGB"
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self.size = 768, 512 # FIXME: not correct for rotated images!
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self.tile = [("pcd", (0,0)+self.size, 96*2048, None)]
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def draft(self, mode, size):
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if len(self.tile) != 1:
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return
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d, e, o, a = self.tile[0]
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if size:
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scale = max(self.size[0] / size[0], self.size[1] / size[1])
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for s, o in [(4,0*2048), (2,0*2048), (1,96*2048)]:
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if scale >= s:
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break
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# e = e[0], e[1], (e[2]-e[0]+s-1)/s+e[0], (e[3]-e[1]+s-1)/s+e[1]
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# self.size = ((self.size[0]+s-1)/s, (self.size[1]+s-1)/s)
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self.tile = [(d, e, o, a)]
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return self
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#
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# registry
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Image.register_open("PCD", PcdImageFile)
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Image.register_extension("PCD", ".pcd")
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