If a transform feedback buffer's size is 0, st_bufferobj_data doesn't
end up creating a buffer for it. There's no point in trying to write to
such a buffer, so just pretend as if it's not really there.
This fixes arb_gpu_shader5-xfb-streams-without-invocations on nvc0.
Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
---
src/mesa/state_tracker/st_cb_xformfb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/mesa/state_tracker/st_cb_xformfb.c
b/src/mesa/state_tracker/st_cb_xformfb.c
index 8f75eda..a2bd86a 100644
--- a/src/mesa/state_tracker/st_cb_xformfb.c
+++ b/src/mesa/state_tracker/st_cb_xformfb.c
@@ -122,7 +122,7 @@ st_begin_transform_feedback(struct gl_context *ctx, GLenum
mode,
for (i = 0; i < max_num_targets; i++) {
struct st_buffer_object *bo = st_buffer_object(sobj->base.Buffers[i]);
- if (bo) {
+ if (bo && bo->buffer) {
/* Check whether we need to recreate the target. */
if (!sobj->targets[i] ||
sobj->targets[i] == sobj->draw_count ||
--
2.0.5
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