gallium: implement set_sample_mask() in all drivers

prevents segfault when state trackers try to set default mask.
Other option would be to make this required only for drivers
supporting multisampling, but this seems more clean.
Only dummy implementations (for normal drivers) provided (no driver
supports multisampling yet neither).

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_state.h b/src/gallium/drivers/softpipe/sp_state.h
index f97fc6eca8..5b0faabeae 100644
--- a/src/gallium/drivers/softpipe/sp_state.h
+++ b/src/gallium/drivers/softpipe/sp_state.h
@@ -148,6 +148,9 @@ void softpipe_set_stencil_ref( struct pipe_context *pipe,
 void softpipe_set_clip_state( struct pipe_context *,
                               const struct pipe_clip_state * );
 
+void softpipe_set_sample_mask( struct pipe_context *,
+                               unsigned sample_mask );
+
 void softpipe_set_constant_buffer(struct pipe_context *,
                                   uint shader, uint index,
                                   struct pipe_resource *buf);