to put png.h and pngconf.h in $prefix/include, like the other scripts,
instead of in $prefix/include/libpng.  Also revised makefile.sco
to put them in $prefix/include/libpng12 instead of in
$prefix/include/libpng/libpng12.

and added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.

It will be replaced in the future with a function that accounts for gamma.

in a nonliner colorspace.

from png.h to pngpriv.h.

to accomplish alpha premultiplication when PNG_READ_COMPOSITE_NODIV_SUPPORTED
is defined.  Changed "/255" to "/255.0" in background calculations to make it
clear that the 255 is used as a double (and to prevent anyone from being
tempted to use PNG_DIVIDE_BY_255() there).

It is a pointer, not an exported function.

and moved it from libpngpf.3 to libpng.3 since it is exported.

and png_set_longjmp_fn() to libpngpf.3 synopsis

    longjmp function as well as returning a pointer to the setjmp
    jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
    (John Bowler)

around the call to png_flush() after png_write_IEND().  See 1.4.0beta32,
1.4.0beta50 changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41
CHANGES in the libpng_master branch.  Someone needs this feature but
I don't remember who.

from projects/visualc71/README_zlib.txt

into scripts/README.txt and updated the copyright year in scripts/pngwin.rc
from 2006 to 2009.

distributions (they are needed by CMakeList.txt).