[Mesa-dev] [PATCH] mesa: Don't call driver when there is no compute work

[Jordan Justen]

The ARB_compute_shader spec says:

  "If the work group count in any dimension is zero, no work groups
   are dispatched."

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
 src/mesa/main/compute.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mesa/main/compute.c b/src/mesa/main/compute.c
index 53e7a50..b71430f 100644
--- a/src/mesa/main/compute.c
+++ b/src/mesa/main/compute.c
@@ -41,6 +41,9 @@ _mesa_DispatchCompute(GLuint num_groups_x,
    if (!_mesa_validate_DispatchCompute(ctx, num_groups))
       return;
 
+   if (num_groups_x == 0u || num_groups_y == 0u || num_groups_z == 0u)
+       return;
+
    ctx->Driver.DispatchCompute(ctx, num_groups);
 }
 
-- 
2.7.0