[Mesa-dev] [PATCH 2/3] i965: Set dirty state for brw_draw_upload.c when num_instances changes.

[Eric Anholt]

Otherwise, if we had a set of prims passed in with a num_instances varying
between them, we wouldn't upload enough (or too much!) from user vertex
arrays.
---
 src/mesa/drivers/dri/i965/brw_draw.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 1cfba29..22d18f9 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -474,7 +474,10 @@ static bool brw_try_draw_prims( struct gl_context *ctx,
       intel_batchbuffer_require_space(intel, estimated_max_prim_size, false);
       intel_batchbuffer_save_state(intel);
 
-      brw->num_instances = prim->num_instances;
+      if (brw->num_instances != prim->num_instances) {
+         brw->num_instances = prim->num_instances;
+         brw->state.dirty.brw |= BRW_NEW_VERTICES;
+      }
       if (intel->gen < 6)
 	 brw_set_prim(brw, &prim[i]);
       else
-- 
1.7.10.4