3 files changed, 29 insertions, 0 deletions
diff --git a/src/mesa/main/barrier.c b/src/mesa/main/barrier.c
index 7ae8fc6b0aa..42a5e0f9203 100644
--- a/src/mesa/main/barrier.c
+++ b/src/mesa/main/barrier.c
@@ -108,3 +108,17 @@ _mesa_MemoryBarrierByRegion(GLbitfield barriers)
       ctx->Driver.MemoryBarrier(ctx, barriers);
    }
 }
+
+void GLAPIENTRY
+_mesa_BlendBarrierMESA(void)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (!ctx->Extensions.MESA_shader_framebuffer_fetch_non_coherent) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBlendBarrier(not supported)");
+      return;
+   }
+
+   ctx->Driver.BlendBarrier(ctx);
+}
diff --git a/src/mesa/main/barrier.h b/src/mesa/main/barrier.h
index 8eee583c7ff..21dce90d074 100644
--- a/src/mesa/main/barrier.h
+++ b/src/mesa/main/barrier.h
@@ -47,4 +47,7 @@ _mesa_MemoryBarrier(GLbitfield barriers);
 void GLAPIENTRY
 _mesa_MemoryBarrierByRegion(GLbitfield barriers);
 
+void GLAPIENTRY
+_mesa_BlendBarrierMESA(void);
+
 #endif /* BARRIER_H */
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index a3dc191b444..257dc103817 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -958,6 +958,18 @@ struct dd_function_table {
    /** @} */
 
    /**
+    * GL_MESA_shader_framebuffer_fetch_non_coherent rendering barrier.
+    *
+    * On return from this function any framebuffer contents written by
+    * previous draw commands are guaranteed to be visible from subsequent
+    * fragment shader invocations using the
+    * MESA_shader_framebuffer_fetch_non_coherent interface.
+    */
+   /** @{ */
+   void (*BlendBarrier)(struct gl_context *ctx);
+   /** @} */
+
+   /**
     * \name GL_ARB_compute_shader interface
     */
    /*@{*/