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Fix #26557: dots near alpha borders on textures. Tweak threshold in alpha

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de-premul for image textures to avoid float precision issues.
This commit is contained in:
Brecht Van Lommel
2011-03-20 15:03:13 +00:00
parent 549b5e1222
commit b71efb4152
1 changed files with 3 additions and 3 deletions
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6
source/blender/render/intern/source/imagetexture.c
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@@ -258,7 +258,7 @@ int imagewrap(Tex *tex, Image *ima, ImBuf *ibuf, float *texvec, TexResult *texre
if(tex->flag & TEX_NEGALPHA) texres->ta= 1.0f-texres->ta;
/* de-premul, this is being premulled in shade_input_do_shade() */
if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
if(texres->ta!=1.0f && texres->ta>1e-4f) {
fx= 1.0f/texres->ta;
texres->tr*= fx;
texres->tg*= fx;
@@ -1374,7 +1374,7 @@ static int imagewraposa_aniso(Tex *tex, Image *ima, ImBuf *ibuf, float *texvec,
// brecht: tried to fix this, see "TXF alpha" comments
if (texres->ta != 1.f && (texres->ta > FLT_EPSILON)) {
if (texres->ta != 1.f && (texres->ta > 1e-4f)) {
fx = 1.f/texres->ta;
texres->tr *= fx;
texres->tg *= fx;
@@ -1755,7 +1755,7 @@ int imagewraposa(Tex *tex, Image *ima, ImBuf *ibuf, float *texvec, float *DXT, f
}
/* de-premul, this is being premulled in shade_input_do_shade() */
if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
if(texres->ta!=1.0f && texres->ta>1e-4f) {
fx= 1.0f/texres->ta;
texres->tr*= fx;
texres->tg*= fx;