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[devel] Relocate the INVERT_ALPHA function within png_read_png()

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and png_write_png().
This commit is contained in:
Glenn Randers-Pehrson
2009-06-29 16:45:53 -05:00
parent cd2634b3ce
commit 6878eb6899
4 changed files with 16 additions and 12 deletions
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13
pngread.c
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@@ -1195,12 +1195,6 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL)
return;
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
/* Invert the alpha channel from opacity to transparency
*/
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
png_set_invert_alpha(png_ptr);
#endif
/* png_read_info() gives us all of the information from the
* PNG file before the first IDAT (image data chunk).
@@ -1301,6 +1295,13 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
png_set_swap(png_ptr);
#endif
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
/* Invert the alpha channel from opacity to transparency
*/
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
png_set_invert_alpha(png_ptr);
#endif
/* We don't handle adding filler bytes */
/* Optional call to gamma correct and add the background to the palette