forked from bartvdbraak/blender
Fix for bug #8750: depremul in the image texture code should check
with an epsilon rather than 0.0f, could give random spots otherwise with e.g. calcalpha + negalpha.
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@ -32,6 +32,7 @@
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#include <string.h>
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#include <fcntl.h>
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#include <math.h>
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#include <float.h>
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#ifndef WIN32
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#include <unistd.h>
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#else
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@ -245,7 +246,7 @@ int imagewrap(Tex *tex, Image *ima, ImBuf *ibuf, float *texvec, TexResult *texre
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if(tex->flag & TEX_NEGALPHA) texres->ta= 1.0f-texres->ta;
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/* de-premul, this is being premulled in shade_input_do_shade() */
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if(texres->ta!=1.0f && texres->ta!=0.0f) {
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if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
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fx= 1.0f/texres->ta;
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texres->tr*= fx;
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texres->tg*= fx;
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@ -989,7 +990,7 @@ int imagewraposa(Tex *tex, Image *ima, ImBuf *ibuf, float *texvec, float *dxt, f
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}
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/* de-premul, this is being premulled in shade_input_do_shade() */
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if(texres->ta!=1.0f && texres->ta!=0.0f) {
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if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
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fx= 1.0f/texres->ta;
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texres->tr*= fx;
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texres->tg*= fx;
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