add inf and nan tests to swrast functions

src/mesa/swrast/s_aalinetemp.h

@@ -1,4 +1,4 @@
-/* $Id: s_aalinetemp.h,v 1.14 2001/09/19 20:30:44 kschultz Exp $ */
+/* $Id: s_aalinetemp.h,v 1.15 2001/12/05 10:24:31 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -162,7 +162,7 @@ NAME(line)(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1)
    line.len = (GLfloat) sqrt(line.dx * line.dx + line.dy * line.dy);
    line.halfWidth = 0.5F * ctx->Line.Width;
 
-   if (line.len == 0.0)
+   if (line.len == 0.0 || IS_INF_OR_NAN(line.len))
       return;
 
    line.xAdj = line.dx / line.len * line.halfWidth;

src/mesa/swrast/s_aatritemp.h

@@ -1,4 +1,4 @@
-/* $Id: s_aatritemp.h,v 1.21 2001/09/19 20:30:44 kschultz Exp $ */
+/* $Id: s_aatritemp.h,v 1.22 2001/12/05 10:24:31 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -149,7 +149,7 @@
       const GLfloat area = majDx * botDy - botDx * majDy;
       ltor = (GLboolean) (area < 0.0F);
       /* Do backface culling */
-      if (area * bf < 0 || area * area < .0025)
+      if (area * bf < 0 || area == 0 || IS_INF_OR_NAN(area))
 	 return;
    }
 

src/mesa/swrast/s_linetemp.h

@@ -1,4 +1,4 @@
-/* $Id: s_linetemp.h,v 1.9 2001/07/13 20:07:37 brianp Exp $ */
+/* $Id: s_linetemp.h,v 1.10 2001/12/05 10:24:31 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -180,6 +180,13 @@
    }
 #endif
 
+   /* Cull primitives with malformed coordinates.
+    */
+   {
+      float tmp = vert0->win[0] + vert0->win[1] + vert1->win[0] + vert1->win[1];
+      if (IS_INF_OR_NAN(tmp))
+	 return;
+   }
 
 /*
  * Despite being clipped to the view volume, the line's window coordinates

src/mesa/swrast/s_pointtemp.h

@@ -1,4 +1,4 @@
-/* $Id: s_pointtemp.h,v 1.10 2001/09/19 20:30:44 kschultz Exp $ */
+/* $Id: s_pointtemp.h,v 1.11 2001/12/05 10:24:31 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -119,6 +119,14 @@ NAME ( GLcontext *ctx, const SWvertex *vert )
    size = ctx->Point._Size;
 #endif
 
+   /* Cull primitives with malformed coordinates.
+    */
+   {
+      float tmp = vert->win[0] + vert->win[1];
+      if (IS_INF_OR_NAN(tmp))
+	 return;
+   }
+
 #if FLAGS & SPRITE
    {
       SWcontext *swctx = SWRAST_CONTEXT(ctx);

src/mesa/swrast/s_tritemp.h

@@ -1,4 +1,4 @@
-/* $Id: s_tritemp.h,v 1.27 2001/09/19 20:30:44 kschultz Exp $ */
+/* $Id: s_tritemp.h,v 1.28 2001/12/05 10:24:31 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -199,7 +199,7 @@
       if (area * bf < 0.0)
          return;
 
-      if (area == 0.0F)
+      if (area == 0.0F || IS_INF_OR_NAN(area))
          return;
 
       oneOverArea = 1.0F / area;