added div by zero check for Fog.End/Start (from gallium-0.1)

2008-05-18 15:41:36 -06:00
parent 4b6b0fd526
commit 5976a6a75c
1 changed files with 2 additions and 1 deletions
@@ -253,7 +253,8 @@ _mesa_fetch_state(GLcontext *ctx, const gl_state_index state[],
      value[0] = ctx->Fog.Density;
      value[1] = ctx->Fog.Start;
      value[2] = ctx->Fog.End;
-      value[3] = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+      value[3] = (ctx->Fog.End == ctx->Fog.Start)
+         ? 1.0 : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
      return;
   case STATE_CLIPPLANE:
      {