diff options
Diffstat (limited to 'src/mesa/swrast/s_tritemp.h')
| -rw-r--r-- | src/mesa/swrast/s_tritemp.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h index dcc3e958cb1..891eaf6787a 100644 --- a/src/mesa/swrast/s_tritemp.h +++ b/src/mesa/swrast/s_tritemp.h @@ -292,18 +292,17 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, #else const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy; #endif - /* Do backface culling */ - if (area * bf < 0.0) + if (IS_INF_OR_NAN(area) || area == 0.0F) return; - if (IS_INF_OR_NAN(area) || area == 0.0F) + if (area * bf * swrast->_BackfaceCullSign < 0.0) return; oneOverArea = 1.0F / area; - } - - span.facing = ctx->_Facing; /* for 2-sided stencil test */ + /* 0 = front, 1 = back */ + span.facing = oneOverArea * bf > 0.0F; + } /* Edge setup. For a triangle strip these could be reused... */ { |