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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.
83 lines
1.9 KiB
Python
83 lines
1.9 KiB
Python
#
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# The Python Imaging Library.
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# $Id$
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#
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# Sun image file handling
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#
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# History:
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# 1995-09-10 fl Created
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# 1996-05-28 fl Fixed 32-bit alignment
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# 1998-12-29 fl Import ImagePalette module
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# 2001-12-18 fl Fixed palette loading (from Jean-Claude Rimbault)
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#
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# Copyright (c) 1997-2001 by Secret Labs AB
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# Copyright (c) 1995-1996 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__ = "0.3"
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from . import Image, ImageFile, ImagePalette, _binary
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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 i32(prefix) == 0x59a66a95
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##
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# Image plugin for Sun raster files.
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class SunImageFile(ImageFile.ImageFile):
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format = "SUN"
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format_description = "Sun Raster File"
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def _open(self):
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# HEAD
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s = self.fp.read(32)
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if i32(s) != 0x59a66a95:
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raise SyntaxError("not an SUN raster file")
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offset = 32
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self.size = i32(s[4:8]), i32(s[8:12])
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depth = i32(s[12:16])
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if depth == 1:
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self.mode, rawmode = "1", "1;I"
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elif depth == 8:
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self.mode = rawmode = "L"
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elif depth == 24:
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self.mode, rawmode = "RGB", "BGR"
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else:
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raise SyntaxError("unsupported mode")
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compression = i32(s[20:24])
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if i32(s[24:28]) != 0:
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length = i32(s[28:32])
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offset = offset + length
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self.palette = ImagePalette.raw("RGB;L", self.fp.read(length))
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if self.mode == "L":
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self.mode = rawmode = "P"
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stride = (((self.size[0] * depth + 7) // 8) + 3) & (~3)
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if compression == 1:
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self.tile = [("raw", (0,0)+self.size, offset, (rawmode, stride))]
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elif compression == 2:
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self.tile = [("sun_rle", (0,0)+self.size, offset, rawmode)]
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#
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# registry
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Image.register_open("SUN", SunImageFile, _accept)
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Image.register_extension("SUN", ".ras")
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