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[devel] Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again.

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If this is not enabled, png_set_strip_16() and png_do_scale_16_to_8()
aren't built.
This commit is contained in:
Glenn Randers-Pehrson
2011-06-16 09:05:40 -05:00
parent 733b131545
commit 5f0b9276ec
9 changed files with 39 additions and 22 deletions
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2
pngread.c
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@@ -1289,8 +1289,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
#ifdef PNG_READ_16_TO_8_SUPPORTED
/* Tell libpng to strip 16-bit/color files down to 8 bits per color.
*/
# ifdef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
if (transforms & PNG_TRANSFORM_STRIP_16)
png_set_strip_16(png_ptr);
# endif
# ifdef PNG_READ_CHOP_16_TO_8_SUPPORTED
/* Added at libpng-1.5.4. "chop_16" produces the same result that "strip_16"
* did in earlier versions, while "strip_16" is now more accurate.