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https://github.com/python-pillow/Pillow.git
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a7e3b2e47b
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.
90 lines
2.1 KiB
Python
90 lines
2.1 KiB
Python
#
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# The Python Imaging Library.
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# $Id$
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#
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# SGI image file handling
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#
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# See "The SGI Image File Format (Draft version 0.97)", Paul Haeberli.
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# <ftp://ftp.sgi.com/graphics/SGIIMAGESPEC>
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#
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# History:
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# 1995-09-10 fl Created
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#
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# Copyright (c) 2008 by Karsten Hiddemann.
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# Copyright (c) 1997 by Secret Labs AB.
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# Copyright (c) 1995 by Fredrik Lundh.
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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__ = "0.2"
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from . import Image, ImageFile, _binary
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i8 = _binary.i8
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i16 = _binary.i16be
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i32 = _binary.i32be
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def _accept(prefix):
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return i16(prefix) == 474
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##
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# Image plugin for SGI images.
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class SgiImageFile(ImageFile.ImageFile):
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format = "SGI"
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format_description = "SGI Image File Format"
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def _open(self):
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# HEAD
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s = self.fp.read(512)
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if i16(s) != 474:
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raise SyntaxError("not an SGI image file")
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# relevant header entries
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compression = i8(s[2])
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# bytes, dimension, zsize
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layout = i8(s[3]), i16(s[4:]), i16(s[10:])
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# determine mode from bytes/zsize
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if layout == (1, 2, 1) or layout == (1, 1, 1):
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self.mode = "L"
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elif layout == (1, 3, 3):
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self.mode = "RGB"
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elif layout == (1, 3, 4):
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self.mode = "RGBA"
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else:
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raise SyntaxError("unsupported SGI image mode")
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# size
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self.size = i16(s[6:]), i16(s[8:])
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# decoder info
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if compression == 0:
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offset = 512
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pagesize = self.size[0]*self.size[1]*layout[0]
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self.tile = []
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for layer in self.mode:
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self.tile.append(("raw", (0,0)+self.size, offset, (layer,0,-1)))
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offset = offset + pagesize
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elif compression == 1:
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self.tile = [("sgi_rle", (0,0)+self.size, 512, (self.mode, 0, -1))]
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#
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# registry
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Image.register_open("SGI", SgiImageFile, _accept)
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Image.register_extension("SGI", ".bw")
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Image.register_extension("SGI", ".rgb")
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Image.register_extension("SGI", ".rgba")
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Image.register_extension("SGI", ".sgi") # really?
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