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[devel] Revised example.c to demonstrate png_set_chop_16().

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Glenn Randers-Pehrson 2011-06-16 09:39:40 -05:00
parent 3fb7c07ea5
commit 857dbbe7cc
1 changed files with 9 additions and 2 deletions
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11
example.c
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@ -187,8 +187,15 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
* are mutually exclusive.
*/
/* Tell libpng to strip 16 bit/color files down to 8 bits/color */
png_set_strip_16(png_ptr);
/* Tell libpng to strip 16 bit/color files down to 8 bits/color.
* Use accurate scaling if it's available, otherwise just chop off the
* low byte.
*/
#ifdef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
png_set_strip_16(png_ptr);
#else
png_set_chop_16(png_ptr);
#endif
/* Strip alpha bytes from the input data without combining with the
* background (not recommended).