X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4b48b6105049e9ef88ee538ea8f2cb2289c38089..a47ad3591bff06e4585b7209391138c4c97d2af8:/src/png/ANNOUNCE diff --git a/src/png/ANNOUNCE b/src/png/ANNOUNCE index 77eea6eb23..d8ad39e51f 100644 --- a/src/png/ANNOUNCE +++ b/src/png/ANNOUNCE @@ -1,53 +1,87 @@ - -Libpng 1.0.3 - January 14, 1999 +Libpng 1.5.6 - November 3, 2011 This is a public release of libpng, intended for use in production codes. -Changes since the previous public release (1.0.2): - -libpng-1.0.3: - - Replaced and extended code that was removed from png_set_filler() in 1.0.1a. - Fixed a bug in png_do_filler() that made it fail to write filler bytes in - the left-most pixel of each row (Kevin Bracey). - Changed "static pngcharp tIME_string" to "static char tIME_string[30]" - in pngtest.c (Duncan Simpson). - Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk - even when no tIME chunk was present in the source file. - Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit. - Fixed a problem in png_read_push_finish_row(), which would not skip some - passes that it should skip, for images that are less than 3 pixels high. - Interchanged the order of calls to png_do_swap() and png_do_shift() - in pngwtran.c (John Cromer). - Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h . - Changed "bad adaptive filter type" from error to warning in pngrutil.c . - Fixed a documentation error about default filtering with 8-bit indexed-color. - Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO - (L. Peter Deutsch). - Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions. - Added png_get_copyright() and png_get_header_version() functions. - Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c - Added information about debugging in libpng.txt and libpng.3 . - Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco. - Removed lines after Dynamic Dependencies" in makefile.aco . - Revised makefile.dec to make a shared library (Jeremie Petit). - Removed trailing blanks from all files. - Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h - Added "if" tests to silence complaints about unused png_ptr in png.h and png.c - Changed "check_if_png" function in example.c to return true (nonzero) if PNG. - Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() - which is obsolete. - Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) - Added a statement of Y2K compliance in png.h, libpng.1, and Y2KINFO. - -Send comments/corrections/commendations to -png-implement@dworkin.wustl.edu or to randeg@alumni.rpi.edu +Files available for download: -Glenn R-P +Source files with LF line endings (for Unix/Linux) and with a +"configure" script + + libpng-1.5.6.tar.xz (LZMA-compressed, recommended) + libpng-1.5.6.tar.gz + libpng-1.5.6.tar.bz2 + +Source files with CRLF line endings (for Windows), without the +"configure" script + + lpng156.7z (LZMA-compressed, recommended) + lpng156.zip -Send comments/corrections/commendations to -png-implement@dworkin.wustl.edu or to randeg@alumni.rpi.edu +Other information: -Glenn Randers-Pehrson -libpng maintainer -PNG Development Group + libpng-1.5.6-README.txt + libpng-1.5.6-LICENSE.txt + +Changes since the last public release (1.5.5): + + Fixed some 64-bit type conversion warnings in pngrtran.c + Moved row_info from png_struct to a local variable. + The various interlace mask arrays have been made into arrays of + bytes and made PNG_CONST and static (previously some arrays were + marked PNG_CONST and some weren't). + Additional checks have been added to the transform code to validate the + pixel depths after the transforms on both read and write. + Removed some redundant code from pngwrite.c, in png_desgtroy_write_struct(). + Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4]. + This removes the need to allocate temporary strings for chunk names on + the stack in the read/write code. Unknown chunk handling still uses the + string form because this is exposed in the API. + Added a note in the manual the png_read_update_info() must be called only + once with a particular info_ptr. + Revised test-pngtest.sh to report FAIL when pngtest fails. + Added "--strict" option to pngtest, to report FAIL when the failure is + only because the resulting valid files are different. + Revised CMakeLists.txt to work with mingw and removed some material from + CMakeLists.txt that is no longer useful in libpng-1.5. + Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")." + Speed up png_combine_row() for interlaced images. This reduces the generality + of the code, allowing it to be optimized for Adam7 interlace. The masks + passed to png_combine_row() are now generated internally, avoiding + some code duplication and localizing the interlace handling somewhat. + Align png_struct::row_buf - previously it was always unaligned, caused by + a bug in the code that attempted to align it; the code needs to subtract + one from the pointer to take account of the filter byte prepended to + each row. + Optimized png_combine_row() when rows are aligned. This gains a small + percentage for 16-bit and 32-bit pixels in the typical case where the + output row buffers are appropriately aligned. The optimization was not + previously possible because the png_struct buffer was always misaligned. + Removed two redundant tests for unitialized row. + Fixed a relatively harmless memory overwrite in compressed text writing + with a 1 byte zlib buffer. + Add ability to call png_read_update_info multiple times to pngvalid.c + Fixes for multiple calls to png_read_update_info. These fixes attend to + most of the errors revealed in pngvalid, however doing the gamma work + twice results in inaccuracies that can't be easily fixed. There is now + a warning in the code if this is going to happen. + Turned on multiple png_read_update_info in pngvalid transform tests. + Prevent libpng from overwriting unused bits at the end of the image when + it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would + overwrite the partial byte at the end of each row if the row width was not + an exact multiple of 8 bits and the image is not interlaced. + Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row + (Mans Rullgard). + Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM" + Added PNG_LSR() and PNG_LSL() macros to defend against buggy compilers that + evaluate non-taken code branches and complain about out-of-range shifts. + Renamed the local variable 'byte' because it appears in a MSYS header + file. + Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h + +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