[devel] Freeze build-time only configuration in the build.

In all prior versions of libpng most configuration options
    controlled by compiler #defines had to be repeated by the
    application code that used libpng.  This patch changes this
    so that compilation options that can only be changed at build
    time are frozen in the build.  Options that are compiler
    dependent (and those that are system dependent) are evaluated
    each time - pngconf.h holds these.  Options that can be changed
    per-file in the application are in png.h.  Frozen options are
    in the new installed header file pnglconf.h
This commit is contained in:
Glenn Randers-Pehrson
2010-04-16 22:12:51 -05:00
parent 3cd7cffd0c
commit 862cb20ea6
18 changed files with 1459 additions and 1088 deletions

12
CHANGES
View File

@@ -2622,7 +2622,7 @@ version 1.5.0beta16 [April 1, 2010]
Combined multiple png_warning() calls for a single error.
Restored the macro definition of png_check_sig().
version 1.5.0beta17 [April 17, 2010]
version 1.5.0beta17 [April 16, 2010]
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
@@ -2630,6 +2630,16 @@ version 1.5.0beta17 [April 17, 2010]
the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
Freeze build-time only configuration in the build.
In all prior versions of libpng most configuration options
controlled by compiler #defines had to be repeated by the
application code that used libpng. This patch changes this
so that compilation options that can only be changed at build
time are frozen in the build. Options that are compiler
dependent (and those that are system dependent) are evaluated
each time - pngconf.h holds these. Options that can be changed
per-file in the application are in png.h. Frozen options are
in the new installed header file pnglconf.h
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