st/mesa: make user index buffers optional

v2: use a separate upload buffer for indices

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index c24ae75a2a9..fa7c18895c7 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -61,6 +61,7 @@
 #include "util/u_format.h"
 #include "util/u_prim.h"
 #include "util/u_draw_quad.h"
+#include "util/u_upload_mgr.h"
 #include "draw/draw_context.h"
 #include "cso_cache/cso_context.h"
 
@@ -645,6 +646,10 @@ setup_index_buffer(struct st_context *st,
       pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
       ibuffer->offset = pointer_to_offset(ib->ptr);
    }
+   else if (st->indexbuf_uploader) {
+      u_upload_data(st->indexbuf_uploader, 0, ib->count * ibuffer->index_size,
+                    ib->ptr, &ibuffer->offset, &ibuffer->buffer);
+   }
    else {
       /* indices are in user space memory */
       ibuffer->buffer =