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, 7 insertions, 0 deletions

diff --git a/src/gallium/drivers/i915/i915_state.c b/src/gallium/drivers/i915/i915_state.c
index f883883852..e008195a91 100644
--- a/src/gallium/drivers/i915/i915_state.c
+++ b/src/gallium/drivers/i915/i915_state.c
@@ -806,6 +806,12 @@ i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
    FREE( velems );
 }
 
+static void
+i915_set_sample_mask(struct pipe_context *pipe,
+                     unsigned sample_mask)
+{
+}
+
 void
 i915_init_state_functions( struct i915_context *i915 )
 {
@@ -837,6 +843,7 @@ i915_init_state_functions( struct i915_context *i915 )
    i915->base.set_blend_color = i915_set_blend_color;
    i915->base.set_stencil_ref = i915_set_stencil_ref;
    i915->base.set_clip_state = i915_set_clip_state;
+   i915->base.set_sample_mask = i915_set_sample_mask;
    i915->base.set_constant_buffer = i915_set_constant_buffer;
    i915->base.set_framebuffer_state = i915_set_framebuffer_state;