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[libpng16] Added #ifdef PNG_WRITE_sRGB_SUPPORTED, etc., tests where needed in

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png_image_write_main() in pngwrite.c (bug report from Yuriy Levchenko).
This commit is contained in:
Glenn Randers-Pehrson
2013-04-17 11:05:21 -05:00
parent f1736a636b
commit 7fdb594e73
3 changed files with 13 additions and 0 deletions
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8
pngwrite.c
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@@ -2074,9 +2074,12 @@ png_image_write_main(png_voidp argument)
if (write_16bit)
{
#ifdef PNG_WRITE_gAMA_SUPPORTED
/* The gamma here is 1.0 (linear) and the cHRM chunk matches sRGB. */
png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_LINEAR);
#endif
#ifdef PNG_WRITE_cHRM_SUPPORTED
if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB))
png_set_cHRM_fixed(png_ptr, info_ptr,
/* color x y */
@@ -2086,15 +2089,20 @@ png_image_write_main(png_voidp argument)
/* blue */ 15000, 6000
);
}
#endif
#ifdef PNG_WRITE_sRGB_SUPPORTED
else if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB))
png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_PERCEPTUAL);
#endif
#ifdef PNG_WRITE_gAMA_SUPPORTED
/* Else writing an 8-bit file and the *colors* aren't sRGB, but the 8-bit
* space must still be gamma encoded.
*/
else
png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE);
#endif
/* Write the file header. */
png_write_info(png_ptr, info_ptr);