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62 lines
2.4 KiB
Plaintext
62 lines
2.4 KiB
Plaintext
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Libpng 1.5.28beta01 - December 27, 2016
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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Files available for download:
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Source files with LF line endings (for Unix/Linux) and with a
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"configure" script
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1.5.28beta01.tar.xz (LZMA-compressed, recommended)
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1.5.28beta01.tar.gz
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Source files with CRLF line endings (for Windows), without the
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"configure" script
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lp1528b01.7z (LZMA-compressed, recommended)
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lp1528b01.zip
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Other information:
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1.5.28beta01-README.txt
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1.5.28beta01-LICENSE.txt
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libpng-1.5.28beta01-*.asc (armored detached GPG signatures)
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Changes since the last public release (1.5.27):
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version 1.5.28beta01 [December 27, 2016]
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Merged with current libpng16 gregbook, pngvalid.c, pngtest.c, pngminim,
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pngminus
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Fixed undefined behavior in png_push_save_buffer(). Do not call
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memcpy() with a null source, even if count is zero (Leon Scroggins III).
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Added "Common linking failures" section to INSTALL.
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Merge contrib/pngminim/*/makefile with libpng-1.6.24
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Minor editing of INSTALL, (whitespace, added copyright line)
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Removed the use of a macro containing the pre-processor 'defined'
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operator. It is unclear whether this is valid; a macro that
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"generates" 'defined' is not permitted, but the use of the word
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"generates" within the C90 standard seems to imply more than simple
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substitution of an expression itself containing a well-formed defined
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operation.
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Previously the pngtrans.c code always resulted in an unsigned arithmetic
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overflow. This is well defined but produces errors from clang with the
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option to detect unsigned overflow. As the expression only gets
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evaluated once per row in this version of libpng it is easier just
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to rewrite it.
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The previous version of png.c produced a signed overflow as a result of
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both the "& 0xffff" on the most significant bits of a negative argument;
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this converted (-1) into 65535 which resulted in a subsequent overflow.
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Since signed overflow is undefined in C90 the code has been modified to
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correctly calculate a signed result. This requires changing the 'hi'
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result parameter to a signed value.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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to subscribe)
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or to glennrp at users.sourceforge.net
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Glenn R-P
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