libpng-1.4.6 is available from
There are no changes from libpng-1.4.6beta02.
Changes since the last public release (1.4.5):
Fixed bug in background transformation handling in pngrtran.c (it was
looking for the flag in png_ptr->transformations instead of in
png_ptr->flags) (David Raymond).
Fixed misspelled macros in contrib/pngminim (Cosmin)
Updated CMakeLists.txt (Clifford Yapp)
Fixed some typecasts in png_debug statements (Cosmin).
Updated documentation of png_set|get_tRNS() (Thomas Klausner).
Added png_const_structp and png_const_infop types, and used them in
prototypes for most png_get_*() functions.
In the manual, describe the png_get_IHDR() arguments in the correct order.
Updated the synopses in the manual to reflect recent changes.
Fixed a typo in the *.def files and deleted entries that are now
declared in pngpriv.h
Updated contrib/pngsuite/README to add the word "modify".
Added the private PNG_UNUSED() macro definition in pngconf.h.
ifdef out mask arrays in pngread.c when interlacing is not supported.
Added attribute definition (warnings) for MSC_VER >= 1300 in pngconf.h
Added -D_CRT_SECURE_NO_DEPRECATE to CFLAGS in makefile.vcwin32
Fixed mistake in the descriptions of user read_transform and
function prototypes in the manual. The row_info struct is
Added a request in the manual that applications do not use "png_" or
"PNG_" to begin any of their own symbols.
Fixed incorrect examples of callback prototypes in the manual, that were
introduced in libpng-1.0.0.
Removed "strip" from contrib/pngminim/*/makefile.
Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03).
This is expected to be the last release of 1.4.x unless
a security release becomes necessary.