| |
| Libpng 1.5.28rc01 - December 27, 2016 |
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| This is not intended to be a public release. It will be replaced |
| within a few weeks by a public version or by another test version. |
| |
| Files available for download: |
| |
| Source files with LF line endings (for Unix/Linux) and with a |
| "configure" script |
| |
| 1.5.28rc01.tar.xz (LZMA-compressed, recommended) |
| 1.5.28rc01.tar.gz |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
| |
| lp1528r01.7z (LZMA-compressed, recommended) |
| lp1528r01.zip |
| |
| Other information: |
| |
| 1.5.28rc01-README.txt |
| 1.5.28rc01-LICENSE.txt |
| libpng-1.5.28rc01-*.asc (armored detached GPG signatures) |
| |
| Changes since the last public release (1.5.27): |
| |
| version 1.5.28rc01 [December 27, 2016] |
| Merged with current libpng16 gregbook, pngvalid.c, pngtest.c, pngminim, |
| pngminus |
| Fixed undefined behavior in png_push_save_buffer(). Do not call |
| memcpy() with a null source, even if count is zero (Leon Scroggins III). |
| Added "Common linking failures" section to INSTALL. |
| Merge contrib/pngminim/*/makefile with libpng-1.6.24 |
| Minor editing of INSTALL, (whitespace, added copyright line) |
| Removed the use of a macro containing the pre-processor 'defined' |
| operator. It is unclear whether this is valid; a macro that |
| "generates" 'defined' is not permitted, but the use of the word |
| "generates" within the C90 standard seems to imply more than simple |
| substitution of an expression itself containing a well-formed defined |
| operation. |
| Previously the pngtrans.c code always resulted in an unsigned arithmetic |
| overflow. This is well defined but produces errors from clang with the |
| option to detect unsigned overflow. As the expression only gets |
| evaluated once per row in this version of libpng it is easier just |
| to rewrite it. |
| The previous version of png.c produced a signed overflow as a result of |
| both the "& 0xffff" on the most significant bits of a negative argument; |
| this converted (-1) into 65535 which resulted in a subsequent overflow. |
| Since signed overflow is undefined in C90 the code has been modified to |
| correctly calculate a signed result. This requires changing the 'hi' |
| result parameter to a signed value. |
| |
| Send comments/corrections/commendations to png-mng-implement at lists.sf.net |
| (subscription required; visit |
| https://lists.sourceforge.net/lists/listinfo/png-mng-implement |
| to subscribe) |
| or to glennrp at users.sourceforge.net |
| |
| Glenn R-P |
