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[libpng17] Made default Zlib compression settings be configurable. This adds #defines to

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pnglibconf.h to control the defaults.
This commit is contained in:
John Bowler
2012-12-20 22:16:51 -06:00
committed by Glenn Randers-Pehrson
parent 5a0afcfa63
commit e699993d70
6 changed files with 205 additions and 174 deletions
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12
pngwrite.c
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@@ -506,15 +506,19 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
*/
png_ptr->zbuffer_size = PNG_ZBUF_SIZE;
png_ptr->zlib_strategy = Z_FILTERED; /* may be overridden if no filters */
png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
/* The 'zlib_strategy' setting is irrelevant because png_default_claim in
* pngwutil.c defaults it according to whether or not filters will be used,
* and ignores this setting.
*/
png_ptr->zlib_strategy = PNG_Z_DEFAULT_STRATEGY;
png_ptr->zlib_level = PNG_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_mem_level = 8;
png_ptr->zlib_window_bits = 15;
png_ptr->zlib_method = 8;
#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY;
png_ptr->zlib_text_level = Z_DEFAULT_COMPRESSION;
png_ptr->zlib_text_strategy = PNG_TEXT_Z_DEFAULT_STRATEGY;
png_ptr->zlib_text_level = PNG_TEXT_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_text_mem_level = 8;
png_ptr->zlib_text_window_bits = 15;
png_ptr->zlib_text_method = 8;