1 files changed, 95 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..464013e7c40
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_swtnl.c
@@ -0,0 +1,95 @@
+
+#include "brw_context.h"
+#include "brw_pipe_rast.h"
+
+
+static GLboolean need_swtnl( struct brw_context *brw )
+{
+   const struct pipe_rasterizer_state *rast = &brw->curr.rast->templ;
+
+   /* If we don't require strict OpenGL conformance, never 
+    * use fallbacks.  If we're forcing fallbacks, always
+    * use fallfacks.
+    */
+   if (brw->flags.no_swtnl)
+      return FALSE;
+
+   if (brw->flags.force_swtnl)
+      return TRUE;
+
+   /* Exceeding hw limits on number of VS inputs?
+    */
+   if (brw->curr.num_vertex_elements == 0 ||
+       brw->curr.num_vertex_elements >= BRW_VEP_MAX) {
+      return TRUE;
+   }
+
+   /* Position array with zero stride?
+    *
+    * XXX: position isn't always at zero...
+    * XXX: eliminate zero-stride arrays
+    */
+   {
+      int ve0_vb = brw->curr.vertex_element[0].vertex_buffer_index;
+      
+      if (brw->curr.vertex_buffer[ve0_vb].stride == 0)
+	 return TRUE;
+   }
+
+   /* XXX: short-circuit
+    */
+   return FALSE;
+
+   if (brw->reduced_primitive == PIPE_PRIM_TRIANGLES) {
+      if (rast->poly_smooth)
+	 return TRUE;
+
+   }
+   
+   if (brw->reduced_primitive == PIPE_PRIM_LINES ||
+       (brw->reduced_primitive == PIPE_PRIM_TRIANGLES &&
+	(rast->fill_cw == PIPE_POLYGON_MODE_LINE ||
+	 rast->fill_ccw == PIPE_POLYGON_MODE_LINE)))
+   {
+      /* BRW hardware will do AA lines, but they are non-conformant it
+       * seems.  TBD whether we keep this fallback:
+       */
+      if (rast->line_smooth)
+	 return TRUE;
+
+      /* XXX: was a fallback in mesa (gs doesn't get enough
+       * information to know when to reset stipple counter), but there
+       * must be a way around it.
+       */
+      if (rast->line_stipple_enable &&
+	  (brw->reduced_primitive == PIPE_PRIM_TRIANGLES ||
+	   brw->primitive == PIPE_PRIM_LINE_LOOP || 
+	   brw->primitive == PIPE_PRIM_LINE_STRIP))
+	 return TRUE;
+   }
+
+   
+   if (brw->reduced_primitive == PIPE_PRIM_POINTS ||
+       (brw->reduced_primitive == PIPE_PRIM_TRIANGLES &&
+	(rast->fill_cw == PIPE_POLYGON_MODE_POINT ||
+	 rast->fill_ccw == PIPE_POLYGON_MODE_POINT)))
+   {
+      if (rast->point_smooth)
+	 return TRUE;
+   }
+
+   /* BRW hardware doesn't handle CLAMP texturing correctly;
+    * brw_wm_sampler_state:translate_wrap_mode() treats CLAMP
+    * as CLAMP_TO_EDGE instead.  If we're using CLAMP, and
+    * we want strict conformance, force the fallback.
+    *
+    * XXX: need a workaround for this.
+    */
+      
+   /* Nothing stopping us from the fast path now */
+   return FALSE;
+}
+
+
+
+