gallium: Implement draw_vbo and set_index_buffer for all drivers.

Some drivers define a generic function that is called by all drawing
functions.  To implement draw_vbo for such drivers, either draw_vbo
calls the generic function or the prototype of the generic function is
changed to match draw_vbo.

Other drivers have no such generic function.  draw_vbo is implemented by
calling either draw_arrays and draw_elements.

For most drivers, set_index_buffer does not mark the state dirty for
tracking.  Instead, the index buffer state is emitted whenever draw_vbo
is called, just like the case with draw_elements.  It surely can be
improved.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gallium/drivers/failover/fo_state_emit.c b/src/gallium/drivers/failover/fo_state_emit.c
index 147f23269ca..7f434ff9d68 100644
--- a/src/gallium/drivers/failover/fo_state_emit.c
+++ b/src/gallium/drivers/failover/fo_state_emit.c
@@ -135,5 +135,10 @@ failover_state_emit( struct failover_context *failover )
                                         failover->vertex_buffers );
    }
 
+   if (failover->dirty & FO_NEW_INDEX_BUFFER) {
+      failover->sw->set_index_buffer( failover->sw,
+                                      &failover->index_buffer );
+   }
+
    failover->dirty = 0;
 }