ilo: skip 3DSTATE_INDEX_BUFFER when possible

When only the offset to the index buffer is changed, we can skip the
3DSTATE_INDEX_BUFFER if we always use 0 for the offset, and add
(offset / index_size) to Start Vertex Location in 3DPRIMITIVE.

1 files changed, 8 insertions, 2 deletions

diff --git a/src/gallium/drivers/ilo/ilo_gpe.h b/src/gallium/drivers/ilo/ilo_gpe.h
index 27fa57e2d38..73a94304bf4 100644
--- a/src/gallium/drivers/ilo/ilo_gpe.h
+++ b/src/gallium/drivers/ilo/ilo_gpe.h
@@ -63,9 +63,15 @@ struct ilo_vb_state {
 };
 
 struct ilo_ib_state {
-   struct pipe_index_buffer state;
+   struct pipe_resource *buffer;
+   const void *user_buffer;
+   unsigned offset;
+   unsigned index_size;
 
-   struct pipe_resource *resource;
+   /* these are not valid until the state is finalized */
+   struct pipe_resource *hw_resource;
+   unsigned hw_index_size;
+   /* an offset to be added to pipe_draw_info::start */
    int64_t draw_start_offset;
 };