[libpng16] Imported from libpng-1.6.0beta01.tar

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.6.0alpha01 - December 8, 2011
+Libpng 1.6.0beta01 - December 15, 2011
 
 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.
@@ -9,111 +9,28 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.6.0alpha01.tar.xz (LZMA-compressed, recommended)
-   1.6.0alpha01.tar.gz
-   1.6.0alpha01.tar.bz2
+   1.6.0beta01.tar.xz (LZMA-compressed, recommended)
+   1.6.0beta01.tar.gz
+   1.6.0beta01.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp160a01.7z  (LZMA-compressed, recommended)
-   lp160a01.zip
+   lp160b01.7z  (LZMA-compressed, recommended)
+   lp160b01.zip
 
 Other information:
 
-   1.6.0alpha01-README.txt
-   1.6.0alpha01-LICENSE.txt
+   1.6.0beta01-README.txt
+   1.6.0beta01-LICENSE.txt
 
-Changes since the last public release (1.5.6):
+Changes since the last public release (1.5.7):
 
-Version 1.5.7beta01 [November 4, 2011]
-  Added support for ARM processor (Mans Rullgard)
-  Fixed bug in pngvalid on early allocation failure; fixed type cast in
-    pngmem.c; pngvalid would attempt to call png_error() if the allocation
-    of a png_struct or png_info failed. This would probably have led to a
-    crash.  The pngmem.c implementation of png_malloc() included a cast
-    to png_size_t which would fail on large allocations on 16-bit systems.
-  Fix for the preprocessor of the Intel C compiler. The preprocessor
-    splits adjacent @ signs with a space; this changes the concatentation
-    token from @-@-@ to PNG_JOIN; that should work with all compiler
-    preprocessors.
-  Paeth filter speed improvements from work by Siarhei Siamashka. This
-    changes the 'Paeth' reconstruction function to improve the GCC code
-    generation on x86. The changes are only part of the suggested ones;
-    just the changes that definitely improve speed and remain simple.
-    The changes also slightly increase the clarity of the code.
-
-Version 1.5.7beta02 [November 11, 2011]
-  Check compression_type parameter in png_get_iCCP and remove spurious
-    casts. The compression_type parameter is always assigned to, so must
-    be non-NULL. The cast of the profile length potentially truncated the
-    value unnecessarily on a 16-bit int system, so the cast of the (byte)
-    compression type to (int) is specified by ANSI-C anyway.
-  Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left
-    the sBIT fields in the test pixel as 0, which resulted in a floating
-    point division by zero which was irrelevant but causes systems where
-    FP exceptions cause a crash. Added code to pngvalid to turn on FP
-    exceptions if the appropriate glibc support is there to ensure this is
-    tested in the future.
-  Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the
-    new PNG_JOIN macro.
-  Added versioning to pnglibconf.h comments.
-  Simplified read/write API initial version; basic read/write tested on
-    a variety of images, limited documentation (in the header file.)
-  Installed more accurate linear to sRGB conversion tables. The slightly
-    modified tables reduce the number of 16-bit values that
-    convert to an off-by-one 8-bit value.  The "makesRGB.c" code that was used
-    to generate the tables is now in a contrib/sRGBtables sub-directory.
-
-Version 1.5.7beta03 [November 17, 2011]
-  Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c
-  Added run-time detection of NEON support.
-  Added contrib/libtests; includes simplified API test and timing test and
-    a color conversion utility for rapid checking of failed 'pngstest' results.
-  Multiple transform bug fixes plus a work-round for double gamma correction.
-    libpng does not support more than one transform that requires linear data
-    at once - if this is tried typically the results is double gamma
-    correction. Since the simplified APIs can need rgb to gray combined with
-    a compose operation it is necessary to do one of these outside the main
-    libpng transform code. This check-in also contains fixes to various bugs
-    in the simplified APIs themselves and to some bugs in compose and rgb to
-    gray (on palette) itself.
-  Fixes for C++ compilation using g++ When libpng source is compiled
-    using g++. The compiler imposes C++ rules on the C source; thus it
-    is desireable to make the source work with either C or C++ rules
-    without throwing away useful error information.  This change adds
-    png_voidcast to allow C semantic (void*) cases or the corresponding
-    C++ static_cast operation, as appropriate.
-  Added --noexecstack to assembler file compilation. GCC does not set
-    this on assembler compilation, even though it does on C compilation.
-    This creates security issues if assembler code is enabled; the
-    work-around is to set it by default in the flags for $(CCAS)
-  Work around compilers that don't support declaration of const data. Some
-    compilers fault 'extern const' data declarations (because the data is
-    not initialized); this turns on const-ness only for compilers where
-    this is known to work.
-
-Version 1.5.7beta04 [November 17, 2011]
-  Since the gcc driver does not recognize the --noexecstack flag, we must
-    use the -Wa prefix to have it passed through to the assembler.
-    Also removed a duplicate setting of this flag.
-  Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
-
-Version 1.5.7beta05 [(PENDING RELEASE)]
-  Removed "zTXt" from warning in generic chunk decompression function.
-  Validate time settings passed to pngset() and png_convert_to_rfc1123()
-    (Frank Busse).
-  Allow row_stride==0 to indicate default stride in simplified API.
-  Added MINGW support to CMakeLists.txt
-  Reject invalid compression flag or method when reading the iTXt chunk.
-
-Version 1.6.0alpha01 [December 8, 2011]
+Version 1.6.0beta01 [December 15, 2011]
   Removed machine-generated configure files from the GIT repository (they will
     continue to appear in the tarball distributions).
   Restored the new 'simplified' API, which was deleted from libpng-1.5.7.
   Added example programs for the new 'simplified' API.
-  Moved pngvalid.c into contrib/libtests
-  Rebuilt Makefile.in, configure, etc., with autoconf-2.68
   Added ANSI-C (C90) headers and require them, and take advantage of the
     change. Also fixed some of the projects/* and contrib/* files that needed
     updates for libpng16 and the move of pngvalid.c.
@@ -129,19 +46,22 @@ Version 1.6.0alpha01 [December 8, 2011]
     seems likely that it will ask 'malloc' for more than 65535 bytes with any
     image that has a sufficiently large row size (rather than simply failing
     to read such images).
-  Replaced an "#if" with "ifdef" in pngrtran.c
   New tools directory containing tools used to generate libpng code.
-  Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
-    as in libpng-1.5.4.
-  Put CRLF line endings in the owatcom project files.
-  Fixed minor memset/sizeof errors in pngvalid.c.
   Fixed race conditions in parallel make builds. With higher degrees of
     parallelism during 'make' the use of the same temporary file names such
     as 'dfn*' can result in a race where a temporary file from one arm of the
     build is deleted or overwritten in another arm.  This changes the
     temporary files for suffix rules to always use $* and ensures that the
     non-suffix rules use unique file names.
-  Updated CMakeLists.txt to account for relocated and new test programs.
+
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+#endif
 
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