1 files changed, 114 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_swtnl.c b/src/gallium/drivers/i965/brw_swtnl.c
new file mode 100644
index 00000000000..6684f442d5c
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_swtnl.c
@@ -0,0 +1,114 @@
+
+/* XXX: could split the primitive list to fallback only on the
+ * non-conformant primitives.
+ */
+static GLboolean check_fallbacks( struct brw_context *brw,
+				  const struct _mesa_prim *prim,
+				  GLuint nr_prims )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   GLuint i;
+
+   /* If we don't require strict OpenGL conformance, never 
+    * use fallbacks.  If we're forcing fallbacks, always
+    * use fallfacks.
+    */
+   if (brw->intel.conformance_mode == 0)
+      return GL_FALSE;
+
+   if (brw->intel.conformance_mode == 2)
+      return GL_TRUE;
+
+   if (ctx->Polygon.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (reduced_prim[prim[i].mode] == GL_TRIANGLES) 
+	    return GL_TRUE;
+   }
+
+   /* BRW hardware will do AA lines, but they are non-conformant it
+    * seems.  TBD whether we keep this fallback:
+    */
+   if (ctx->Line.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (reduced_prim[prim[i].mode] == GL_LINES) 
+	    return GL_TRUE;
+   }
+
+   /* Stipple -- these fallbacks could be resolved with a little
+    * bit of work?
+    */
+   if (ctx->Line.StippleFlag) {
+      for (i = 0; i < nr_prims; i++) {
+	 /* GS doesn't get enough information to know when to reset
+	  * the stipple counter?!?
+	  */
+	 if (prim[i].mode == GL_LINE_LOOP || prim[i].mode == GL_LINE_STRIP) 
+	    return GL_TRUE;
+	    
+	 if (prim[i].mode == GL_POLYGON &&
+	     (ctx->Polygon.FrontMode == GL_LINE ||
+	      ctx->Polygon.BackMode == GL_LINE))
+	    return GL_TRUE;
+      }
+   }
+
+   if (ctx->Point.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (prim[i].mode == GL_POINTS) 
+	    return GL_TRUE;
+   }
+
+   /* BRW hardware doesn't handle GL_CLAMP texturing correctly;
+    * brw_wm_sampler_state:translate_wrap_mode() treats GL_CLAMP
+    * as GL_CLAMP_TO_EDGE instead.  If we're using GL_CLAMP, and
+    * we want strict conformance, force the fallback.
+    * Right now, we only do this for 2D textures.
+    */
+   {
+      int u;
+      for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
+         struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u];
+         if (texUnit->Enabled) {
+            if (texUnit->Enabled & TEXTURE_1D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_1D_INDEX]->WrapS == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+            if (texUnit->Enabled & TEXTURE_2D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapS == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapT == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+            if (texUnit->Enabled & TEXTURE_3D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapS == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapT == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapR == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+         }
+      }
+   }
+
+   /* Exceeding hw limits on number of VS inputs?
+    */
+   if (brw->nr_ve == 0 ||
+       brw->nr_ve >= BRW_VEP_MAX) {
+      return TRUE;
+   }
+
+   /* Position array with zero stride?
+    */
+   if (brw->vs[brw->ve[0]]->stride == 0)
+      return TRUE;
+
+
+      
+   /* Nothing stopping us from the fast path now */
+   return GL_FALSE;
+}
+
+
+
+