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[devel] Updated manual about the new API additions

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Glenn Randers-Pehrson 2011-04-01 00:16:50 -05:00
parent b0525f83e1
commit 8eb8833b74
2 changed files with 44 additions and 2 deletions
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13
libpng-manual.txt
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@ -2307,7 +2307,12 @@ with zlib) for details on the compression levels.
png_set_compression_method(png_ptr, 8);
png_set_compression_buffer_size(png_ptr, 8192)
extern PNG_EXPORT(void,png_set_zbuf_size)
/* set zlib parameters for text compression */
png_set_text_compression_mem_level(png_ptr, 8);
png_set_text_compression_strategy(png_ptr,
Z_DEFAULT_STRATEGY);
png_set_text_compression_window_bits(png_ptr, 15);
png_set_text_compression_method(png_ptr, 8);
Setting the contents of info for output
@ -3851,6 +3856,12 @@ PNG_NO_USE_READ_MACROS before including png.h. Notice that this is
only supported from 1.5.0 -defining PNG_NO_USE_READ_MACROS prior to 1.5.0
will lead to a link failure.
Prior to libpng-1.5.3, the zlib compressor used the same set of parameters
when compressing the IDAT data and textual data such as zTXt and iCCP.
In libpng-1.5.3 we reinitialized the zlib stream for each type of data.
We added five png_set_text_*() functions for setting the parameters to
use with textual data.
B. Changes to the build and configuration of libpng
Details of internal changes to the library code can be found in the CHANGES

33
libpng.3
View File

@ -800,6 +800,26 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.5.3beta02
\fI\fB
\fBvoid png_set_text_compression_level (png_structp \fP\fIpng_ptr\fP\fB, int \fIlevel\fP\fB);\fP
\fI\fB
\fBvoid png_set_text_compression_mem_level (png_structp \fP\fIpng_ptr\fP\fB, int \fImem_level\fP\fB);\fP
\fI\fB
\fBvoid png_set_text_compression_strategy (png_structp \fP\fIpng_ptr\fP\fB, int \fIstrategy\fP\fB);\fP
\fI\fB
\fBvoid png_set_text_compression_window_bits (png_structp \fP\fIpng_ptr\fP\fB, int \fIwindow_bits\fP\fB);\fP
\fI\fB
\fBvoid \fP\fIpng_set_text_compression_method\fP\fB, (png_structp \fP\fIpng_ptr\fP\fB, int \fImethod)\fP\fB);\fP
\fI\fB
\fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP
\fI\fB
@ -3230,7 +3250,12 @@ with zlib) for details on the compression levels.
png_set_compression_method(png_ptr, 8);
png_set_compression_buffer_size(png_ptr, 8192)
extern PNG_EXPORT(void,png_set_zbuf_size)
/* set zlib parameters for text compression */
png_set_text_compression_mem_level(png_ptr, 8);
png_set_text_compression_strategy(png_ptr,
Z_DEFAULT_STRATEGY);
png_set_text_compression_window_bits(png_ptr, 15);
png_set_text_compression_method(png_ptr, 8);
.SS Setting the contents of info for output
@ -4774,6 +4799,12 @@ PNG_NO_USE_READ_MACROS before including png.h. Notice that this is
only supported from 1.5.0 -defining PNG_NO_USE_READ_MACROS prior to 1.5.0
will lead to a link failure.
Prior to libpng-1.5.3, the zlib compressor used the same set of parameters
when compressing the IDAT data and textual data such as zTXt and iCCP.
In libpng-1.5.3 we reinitialized the zlib stream for each type of data.
We added five png_set_text_*() functions for setting the parameters to
use with textual data.
B. Changes to the build and configuration of libpng
Details of internal changes to the library code can be found in the CHANGES