mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

[libpng16] Added png_set_itxt() (work in progress)

Browse Source
This commit is contained in:
Glenn Randers-Pehrson
2012-03-16 13:53:25 -05:00
parent d9d7a7e8f0
commit 31d66245ea
6 changed files with 88 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
pngwrite.c
View File

@@ -1410,6 +1410,75 @@ png_set_text_compression_method(png_structrp png_ptr, int method)
#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
/* end of API added to libpng-1.5.4 */
#ifdef PNG_WRITE_TEXT_SUPPORTED
/* TO DO: synopsis in libpng.3
* revise example.c
* set up some macros to use instead of 0,1,2,3
* test, test, test
*/
/* API added to libpng-1.6.0 */
void PNGAPI
png_set_itxt(png_const_structrp png_ptr, png_inforp info_ptr,
const int in_flag, const int in_method, png_const_charp in_key,
png_const_charp in_text, png_const_charp in_lang,
png_const_charp in_lang_key)
{
if (png_ptr != NULL && info_ptr != NULL)
{
png_text text_ptr[1];
char *key = (png_charp) in_key;
char *text = (png_charp) in_text;
#ifdef PNG_WRITE_iTXt_SUPPORTED
char *lang = (png_charp) in_lang;
char *lang_key = (png_charp) in_lang_key;
#endif
text_ptr[0].key = key;
text_ptr[0].text = text;
#ifdef PNG_WRITE_iTXt_SUPPORTED
text_ptr[0].lang = lang;
text_ptr[0].lang_key = lang_key;
#endif
/*
TO DO: use macros for these.
-1: tEXt, none
0: zTXt, deflate
1: iTXt, none
2: iTXt, deflate
*/
if (in_method != 0)
png_benign_error(png_ptr,
"Only text compression method 0 is supported, using 0.");
if (in_flag == 0)
text_ptr[0].compression = -1;
else if (in_flag == 1)
text_ptr[0].compression = 0;
else if (in_flag == 2)
text_ptr[0].compression = 1;
else if (in_flag == 3)
text_ptr[0].compression = 2;
else
{
png_benign_error(png_ptr,
"Unrecognized text compression flag, using (compressed iTXt).");
text_ptr[0].compression = 2;
}
png_debug(1, "in png_set_itxt");
/* TO DO: fix compiler warning about discarding qualifier here */
png_set_text(png_ptr, info_ptr, text_ptr, 1);
}
}
#endif
void PNGAPI
png_set_write_status_fn(png_structrp png_ptr, png_write_status_ptr write_row_fn)
{