Mesa (master): freedreno: fix handling for stream-out offsets

[Rob Clark]

Module: Mesa
Branch: master
Commit: 6ca6e80f61d4fc2e88f1abc2416b1965ecf1d114
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6ca6e80f61d4fc2e88f1abc2416b1965ecf1d114

Author: Rob Clark <robclark at freedesktop.org>
Date:   Tue Apr 12 11:30:31 2016 -0400

freedreno: fix handling for stream-out offsets

If changed && append, we shouldn't be resetting the internal offset back
to zero.  This fixes issues w/ sequences like:

   glBeginTransformFeedback()
   glDraw()
   glPauseTransformFeedback()
   glDraw()
   glResumeTransformFeedback()
   glDraw()
   glEndTransformFeedback()

Fixes dEQP-GLES3.functional.transform_feedback.array.separate.points.lowp_vec3
and related tests.

Signed-off-by: Rob Clark <robclark at freedesktop.org>

---

 src/gallium/drivers/freedreno/freedreno_state.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/freedreno/freedreno_state.c b/src/gallium/drivers/freedreno/freedreno_state.c
index 685d3a7..6c472d1 100644
--- a/src/gallium/drivers/freedreno/freedreno_state.c
+++ b/src/gallium/drivers/freedreno/freedreno_state.c
@@ -359,7 +359,8 @@ fd_set_stream_output_targets(struct pipe_context *pctx,
 		if (!changed && append)
 			continue;
 
-		so->offsets[i] = 0;
+		if (!append)
+			so->offsets[i] = offsets[i];
 
 		pipe_so_target_reference(&so->targets[i], targets[i]);
 	}