mesa: Add GL/GLSL plumbing for ARB_fragment_shader_interlock.

This extension provides new GLSL built-in functions
beginInvocationInterlockARB() and endInvocationInterlockARB()
that delimit a critical section of fragment shader code. For
pairs of shader invocations with "overlapping" coverage in a
given pixel, the OpenGL implementation will guarantee that the
critical section of the fragment shader will be executed for
only one fragment at a time.

Signed-off-by: Plamena Manolova <[email protected]>
Reviewed-by: Francisco Jerez <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/compiler/shader_info.h b/src/compiler/shader_info.h
index afc53a88405..961f0930c8d 100644
--- a/src/compiler/shader_info.h
+++ b/src/compiler/shader_info.h
@@ -179,6 +179,11 @@ typedef struct shader_info {
 
          bool pixel_center_integer;
 
+         bool pixel_interlock_ordered;
+         bool pixel_interlock_unordered;
+         bool sample_interlock_ordered;
+         bool sample_interlock_unordered;
+
          /** gl_FragDepth layout for ARB_conservative_depth. */
          enum gl_frag_depth_layout depth_layout;
       } fs;