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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.
53 lines
1.1 KiB
Python
53 lines
1.1 KiB
Python
#
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# The Python Imaging Library.
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# $Id$
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#
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# Binary input/output support routines.
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#
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# Copyright (c) 1997-2003 by Secret Labs AB
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# Copyright (c) 1995-2003 by Fredrik Lundh
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# Copyright (c) 2012 by Brian Crowell
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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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if bytes is str:
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def i8(c):
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return ord(c)
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def o8(i):
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return chr(i&255)
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else:
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def i8(c):
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return c if c.__class__ is int else c[0]
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def o8(i):
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return bytes((i&255,))
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# Input, le = little endian, be = big endian
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def i16le(c, o=0):
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return i8(c[o]) | (i8(c[o+1])<<8)
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def i32le(c, o=0):
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return i8(c[o]) | (i8(c[o+1])<<8) | (i8(c[o+2])<<16) | (i8(c[o+3])<<24)
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def i16be(c, o=0):
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return (i8(c[o])<<8) | i8(c[o+1])
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def i32be(c, o=0):
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return (i8(c[o])<<24) | (i8(c[o+1])<<16) | (i8(c[o+2])<<8) | i8(c[o+3])
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# Output, le = little endian, be = big endian
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def o16le(i):
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return o8(i) + o8(i>>8)
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def o32le(i):
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return o8(i) + o8(i>>8) + o8(i>>16) + o8(i>>24)
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def o16be(i):
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return o8(i>>8) + o8(i)
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def o32be(i):
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return o8(i>>24) + o8(i>>16) + o8(i>>8) + o8(i)
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