wined3d: Properly check if an attribute is used in streamsrc().

dlls/wined3d/state.c

@@ -4426,19 +4426,24 @@ static void streamsrc(DWORD state, IWineD3DStateBlockImpl *stateblock, struct wi
             device->useDrawStridedSlow = FALSE;
         }
     }
-    else if (fixup || (!dataLocations->elements[WINED3D_FFP_PSIZE].data
-            && !dataLocations->position_transformed
-            && (GL_SUPPORT(EXT_VERTEX_ARRAY_BGRA)
-            || (!dataLocations->elements[WINED3D_FFP_DIFFUSE].data
-            && !dataLocations->elements[WINED3D_FFP_SPECULAR].data))))
+    else
+    {
+        WORD slow_mask = (1 << WINED3D_FFP_PSIZE);
+        slow_mask |= -!GL_SUPPORT(EXT_VERTEX_ARRAY_BGRA) & ((1 << WINED3D_FFP_DIFFUSE) | (1 << WINED3D_FFP_SPECULAR));
+
+        if (fixup || (!dataLocations->position_transformed
+                && !(dataLocations->use_map & slow_mask)))
         {
             /* Load the vertex data using named arrays */
             load_named = TRUE;
             device->useDrawStridedSlow = FALSE;
-    } else {
+        }
+        else
+        {
             TRACE("Not loading vertex data\n");
             device->useDrawStridedSlow = TRUE;
         }
+    }
 
     if (context->numberedArraysLoaded && !load_numbered)
     {