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[libpng15] 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
2013-03-04 16:44:59 -06:00
committed by Glenn Randers-Pehrson
parent 85d027f3d0
commit c34143f615
16 changed files with 563 additions and 270 deletions
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31
scripts/pnglibconf.dfa
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@@ -27,7 +27,7 @@ file pnglibconf.h scripts/pnglibconf.dfa PNGLCONF_H
# The syntax is detailed in scripts/options.awk, this is a summary
# only:
#
# setting <name> [default]
# setting <name> [requires ...] [default]
# #define PNG_<name> <value> /* value comes from current setting */
# option <name> [requires ...] [if ...] [enables ...] [disabled]
# #define PNG_<name>_SUPPORTED if the requirements are met and
@@ -191,12 +191,23 @@ option WRITE enables WRITE_INT_FUNCTIONS
setting FILTER_OPTIMIZATIONS
# This option turns on runtime checks for ARM NEON support, it is irrelevant
# on other platforms and it is irrelevant unless NEON code is turned on. Checks
# are on by default
option ARM_NEON_CHECK
# Implementation specific control of the optimizations, enabled by those
# hardware or software options that need it (typically when run-time choices
# must be made by the user)
option SET_OPTION disabled
# These options are specific to the ARM NEON hardware optimizations:
#
# ARM_NEON: the optimization itself
# ARM_NEON_API: allow the optimization to be switched on with png_set_hardware
# ARM_NEON_CHECK: compile a run-time check to see if Neon extensions are
# supported, this is poorly supported and deprectated - use the
# png_set_hardware API.
option ARM_NEON disabled,
sets FILTER_OPTIMIZATIONS png_init_filter_functions_neon
option ARM_NEON_API disabled enables SET_OPTION ARM_NEON
option ARM_NEON_CHECK disabled enables ARM_NEON
# Generic options - affect both read and write.
option WARNINGS
@@ -369,6 +380,12 @@ option INCH_CONVERSIONS
option BUILD_GRAYSCALE_PALETTE
# This changes the default for the ARM NEON optimizations according to
# __ARM_NEON__
@#ifdef __ARM_NEON__
@# define PNG_ARM_NEON_SUPPORTED
@#endif
# IN DEVELOPMENT
# These are currently experimental features; define them if you want