Also added one msa optimized function: png_read_filter_row_up_msa
Signed-off-by: NMandar Sahastrabuddhe <Mandar.Sahastrabuddhe@imgtec.com>

Moved it from bin_PROGRAMS to check_PROGRAMS in Makefile.am so it will be
built but not installed.

This adds pngcp to the build together with a pngcp.dfa configuration test; the
test revealed some configuration bugs which are fixed by corrections to the
_SUPPORTED macros.

pngcp builds on all tested configurations and a number of bugs have been fixed
to make this happen relative to the version in libpng 1.7 contrib/examples.
pngcp.dfa will have to be different for 1.7 but pngcp.c should work fine (not
yet tested).  pngcp itself is still missing a usage message; this is a
preliminary version, although since it behaves the same way as 'cp' most unoids
shouldn't have a problem using it correctly.
Signed-off-by: NJohn Bowler <jbowler@acm.org>

presence of clock_gettime() in configure.ac and Makefile.am.

on platforms that don't supply clock_gettime().

inadvertently replaced with libpng17 versions).

Signed-off-by: NJohn Bowler <jbowler@acm.org>

tests/pngstest-* are changed so that the new test files are divided into 8
groups by gamma and alpha channel.  This makes each test take just under 5
seconds on a moderately up-to-date x86_64 system using libpng16 (test times are
somewhat variable under libpng17 at present because of the lack of optimization
in some gamma processing paths.)

These tests have considerably better code and pixel-value coverage than
contrib/pngsuite however coverage is still incomplete.
Signed-off-by: NJohn Bowler <jbowler@acm.org>

pnglibconf.* in "make clean" (Cosmin).

configure.  In configure builds 'make install' changes/adds links like png.h
and libpng.a to point to the newly installed, versioned, files (e.g.
libpng17/png.h and libpng17.a). Three new configure options and some
rearrangement of Makefile.am allow creation of these links to be disabled.

it can manage, limited by the number of rows.

Use filter_neon_intrinsics.c in preference to filter_neon.S when possible.

arm/filter_neon_intrinsics.c; enable with configuration flag
PNG_ARM_NEON_INTRINSICS.

    1) Added the 'compile' program to the list of programs that must be cleaned
       in autogen.sh
    2) Added 'subdir-objects' which causes .c files in sub-directories to be
       compiled such that the corresponding .o files are also in the
       sub-directory.  This is because automake 1.14 warns that the
       current behavior of compiling to the top level directory may be removed
       in the future.
    3) Updated dependencies on pnglibconf.h to match the new .o locations and
       added all the files in contrib/libtests and contrib/tools that depend
       on pnglibconf.h
    4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended
       way of handling the dependencies of sources that are machine generated;
       unfortunately it only works if the user does 'make all' or 'make check',
       so the dependencies (3) are still required.

Added information in the documentation about problems with and fixes for
the bad CRC and bad iTXt chunk situations.

which requires both the correct libpng and the correct zlib to function
correctly.

For inflate, reverted previous fixes.
Added fixitxt and pngdeflate to the built programs and removed warnings
from the source code and timepng that are revealed as a result.  Fixed
fixitxt when the chunk length is more than 65535 (untested, no test case).

Revised scripts/makefile.freebsd to respect ZLIBDIR and ZLIBINC.

directory while building with a parallel make.

internal 'prefix.h' file can only be generated correctly after
pnglibconf.h, however the dependency was not in Makefile.am.  The
symptoms are unpredictable depending on the order make chooses to
build pngprefix.h and pnglibconf.h, often the error goes unnoticed
because there is a system pnglibconf.h to use instead.

code to the hardware subdirectory and added comments to pngrutil.c so that
implementors of other optimizations know what to do.