diff options
Diffstat (limited to 'source/blender/render/intern/source/shadeinput.c')
| -rw-r--r-- | source/blender/render/intern/source/shadeinput.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/source/blender/render/intern/source/shadeinput.c b/source/blender/render/intern/source/shadeinput.c index 5ef340be89b..301d5ba5568 100644 --- a/source/blender/render/intern/source/shadeinput.c +++ b/source/blender/render/intern/source/shadeinput.c @@ -1112,11 +1112,24 @@ void shade_input_set_shade_texco(ShadeInput *shi) cp1= (char *)(mcol+j1); cp2= (char *)(mcol+j2); cp3= (char *)(mcol+j3); + + /* alpha value */ + scol->col[3]= (l*((float)cp3[0]) - u*((float)cp1[0]) - v*((float)cp2[0]))/255.0f; + /* try to prevent invalid color sampling of zero alpha points */ + if (!cp1[3]) cp1 = cp2; + if (!cp1[3]) cp1 = cp3; + + if (!cp2[3]) cp2 = cp1; + if (!cp2[3]) cp1 = cp3; + + if (!cp3[3]) cp3 = cp1; + if (!cp3[3]) cp3 = cp2; + + /* sample color value */ scol->col[0]= (l*((float)cp3[3]) - u*((float)cp1[3]) - v*((float)cp2[3]))/255.0f; scol->col[1]= (l*((float)cp3[2]) - u*((float)cp1[2]) - v*((float)cp2[2]))/255.0f; scol->col[2]= (l*((float)cp3[1]) - u*((float)cp1[1]) - v*((float)cp2[1]))/255.0f; - scol->col[3]= (l*((float)cp3[0]) - u*((float)cp1[0]) - v*((float)cp2[0]))/255.0f; } if(shi->totcol) { |