i965: Don't rebase the index buffer to min 0 if any arrays are in VBOs.

There was a check to only do the rebase if we didn't have everything
in VBOs, but nexuiz apparently hands us a mix of VBOs and arrays,
resulting in blocking on the GPU to do a rebase.

Improves nexuiz 800x600, high-settings performance on my Ironlake 41%
(+/- 1.3%), from 14.0fps to 19.7fps.

2 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/vbo/vbo.h b/src/mesa/vbo/vbo.h
index 07d31f6ce3..30b1448b8a 100644
--- a/src/mesa/vbo/vbo.h
+++ b/src/mesa/vbo/vbo.h
@@ -106,6 +106,7 @@ void vbo_split_prims( GLcontext *ctx,
 /* Helpers for dealing translating away non-zero min_index.
  */
 GLboolean vbo_all_varyings_in_vbos( const struct gl_client_array *arrays[] );
+GLboolean vbo_any_varyings_in_vbos( const struct gl_client_array *arrays[] );
 
 void vbo_rebase_prims( GLcontext *ctx,
 		       const struct gl_client_array *arrays[],
diff --git a/src/mesa/vbo/vbo_rebase.c b/src/mesa/vbo/vbo_rebase.c
index ff7c7a6b0d..e75253f862 100644
--- a/src/mesa/vbo/vbo_rebase.c
+++ b/src/mesa/vbo/vbo_rebase.c
@@ -85,6 +85,18 @@ GLboolean vbo_all_varyings_in_vbos( const struct gl_client_array *arrays[] )
    return GL_TRUE;
 }
 
+GLboolean vbo_any_varyings_in_vbos( const struct gl_client_array *arrays[] )
+{
+   GLuint i;
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++)
+      if (arrays[i]->StrideB &&
+	  arrays[i]->BufferObj->Name != 0)
+	 return GL_TRUE;
+
+   return GL_FALSE;
+}
+
 /* Adjust primitives, indices and vertex definitions so that min_index
  * becomes zero. There are lots of reasons for wanting to do this, eg:
  *