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Fix #34966: cycles packed PNG images were showing alpha fringe, packed images

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were not properly premultiplied.
This commit is contained in:
Brecht Van Lommel 2013-04-16 13:52:38 +00:00
parent fe4305ef82
commit 18feb1630d
1 changed files with 8 additions and 0 deletions
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8
intern/cycles/blender/blender_session.cpp
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@ -693,6 +693,14 @@ bool BlenderSession::builtin_image_pixels(const string &builtin_name, void *buil
}
}
/* premultiply, byte images are always straight for blender */
unsigned char *cp = pixels;
for(int i = 0; i < width * height; i++, cp += channels) {
cp[0] = (cp[0] * cp[3]) >> 8;
cp[1] = (cp[1] * cp[3]) >> 8;
cp[2] = (cp[2] * cp[3]) >> 8;
}
return true;
}