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[libpng17] Corrected Android builds and corrected libpng.vers with symbol

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prefixing. This adds an API to set optimization options externally,
providing an alternative and general solution for the non-portable
run-time tests used by the ARM Neon code.  It also makes those tests
compile and link on Android.  The order of settings vs options in
pnglibconf.h is reversed to allow settings to depend on options and
options can now set (or override) the defaults for settings.
This commit is contained in:
John Bowler
2013-03-03 21:29:36 -06:00
committed by Glenn Randers-Pehrson
parent ec89aefb44
commit 808ea281a4
14 changed files with 454 additions and 211 deletions
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25
png.c
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@@ -691,13 +691,13 @@ png_get_copyright(png_const_structrp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.7.0beta05 - February 27, 2013" PNG_STRING_NEWLINE \
"libpng version 1.7.0beta05 - March 4, 2013" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2013 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
return "libpng version 1.7.0beta05 - February 27, 2013\
return "libpng version 1.7.0beta05 - March 4, 2013\
Copyright (c) 1998-2013 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -4062,6 +4062,27 @@ png_build_gamma_tables(png_structrp png_ptr, int bit_depth)
}
#endif /* READ_GAMMA */
/* HARDWARE OPTION SUPPORT */
#ifdef PNG_SET_OPTION_SUPPORTED
int PNGAPI
png_set_option(png_structrp png_ptr, int option, int onoff)
{
if (png_ptr != NULL && option >= 0 && option < PNG_OPTION_NEXT &&
(option & 1) == 0)
{
int mask = 3 << option;
int setting = (2 + (onoff != 0)) << option;
int current = png_ptr->options;
png_ptr->options = (png_byte)((current & ~mask) | setting);
return (current & mask) >> option;
}
return PNG_OPTION_INVALID;
}
#endif
/* sRGB support */
#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)