intel: Remove now trivial intel_renderbuffer_set_{hiz_,}region().

As a result of this cleanup, a bug in
intel_process_dri2_buffer_no_separate_stencil() became quite apparent.
We were associating the NULL pointer after an unreference with the
STENCIL attachment -- clarify the logic and attach the right region.

Reviewed-by: Chad Versace <chad@chad-versace.us>

src/mesa/drivers/dri/intel/intel_context.c

@@ -1112,7 +1112,6 @@ intel_query_dri2_buffers_no_separate_stencil(struct intel_context *intel,
  *
  * \see intel_update_renderbuffers()
  * \see intel_region_alloc_for_handle()
- * \see intel_renderbuffer_set_region()
  */
 static void
 intel_process_dri2_buffer_no_separate_stencil(struct intel_context *intel,
@@ -1124,7 +1123,6 @@ intel_process_dri2_buffer_no_separate_stencil(struct intel_context *intel,
    assert(!intel->must_use_separate_stencil);
 
    struct gl_framebuffer *fb = drawable->driverPrivate;
-   struct intel_region *region = NULL;
    struct intel_renderbuffer *depth_rb = NULL;
 
    if (!rb)
@@ -1151,20 +1149,18 @@ intel_process_dri2_buffer_no_separate_stencil(struct intel_context *intel,
       if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 	 fprintf(stderr, "(reusing depth buffer as stencil)\n");
       }
-      intel_region_reference(&region, depth_rb->region);
+      intel_region_reference(&rb->region, depth_rb->region);
    } else {
-      region = intel_region_alloc_for_handle(intel->intelScreen,
-					     buffer->cpp,
-					     drawable->w,
-					     drawable->h,
-					     buffer->pitch / buffer->cpp,
-					     buffer->name,
-					     buffer_name);
+      intel_region_release(&rb->region);
+      rb->region = intel_region_alloc_for_handle(intel->intelScreen,
+						 buffer->cpp,
+						 drawable->w,
+						 drawable->h,
+						 buffer->pitch / buffer->cpp,
+						 buffer->name,
+						 buffer_name);
    }
 
-   intel_renderbuffer_set_region(intel, rb, region);
-   intel_region_release(&region);
-
    if (buffer->attachment == __DRI_BUFFER_DEPTH_STENCIL) {
       struct intel_renderbuffer *stencil_rb =
 	 intel_get_renderbuffer(fb, BUFFER_STENCIL);
@@ -1172,10 +1168,10 @@ intel_process_dri2_buffer_no_separate_stencil(struct intel_context *intel,
       if (!stencil_rb)
 	 return;
 
-      if (stencil_rb->region && stencil_rb->region->name == buffer->name)
-	 return;
-
-      intel_renderbuffer_set_region(intel, stencil_rb, region);
+      /* The rb passed in is the BUFFER_DEPTH attachment, and we need
+       * to associate this region to BUFFER_STENCIL as well.
+       */
+      intel_region_reference(&stencil_rb->region, rb->region);
    }
 }
 
@@ -1300,7 +1296,6 @@ intel_query_dri2_buffers_with_separate_stencil(struct intel_context *intel,
  *
  * \see intel_update_renderbuffers()
  * \see intel_region_alloc_for_handle()
- * \see intel_renderbuffer_set_region()
  * \see enum intel_dri2_has_hiz
  */
 static void
@@ -1360,9 +1355,9 @@ intel_process_dri2_buffer_with_separate_stencil(struct intel_context *intel,
 				    buffer_name);
 
    if (buffer->attachment == __DRI_BUFFER_HIZ) {
-      intel_renderbuffer_set_hiz_region(intel, rb, region);
+      intel_region_reference(&rb->hiz_region, region);
    } else {
-      intel_renderbuffer_set_region(intel, rb, region);
+      intel_region_reference(&rb->region, region);
    }
 
    intel_region_release(&region);
@@ -1511,12 +1506,10 @@ intel_verify_dri2_has_hiz(struct intel_context *intel,
 					     / depth_stencil_buffer->cpp,
 					  depth_stencil_buffer->name,
 					  "dri2 depth / stencil buffer");
-	 intel_renderbuffer_set_region(intel,
-				       intel_get_renderbuffer(fb, BUFFER_DEPTH),
-				       region);
-	 intel_renderbuffer_set_region(intel,
-				       intel_get_renderbuffer(fb, BUFFER_STENCIL),
-				       region);
+	 intel_region_reference(&intel_get_renderbuffer(fb, BUFFER_DEPTH)->region,
+				region);
+	 intel_region_reference(&intel_get_renderbuffer(fb, BUFFER_STENCIL)->region,
+				region);
 	 intel_region_release(&region);
       }
    }

src/mesa/drivers/dri/intel/intel_fbo.c

@@ -343,25 +343,6 @@ intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
    return GL_FALSE;
 }
 
-
-void
-intel_renderbuffer_set_region(struct intel_context *intel,
-			      struct intel_renderbuffer *rb,
-			      struct intel_region *region)
-{
-   intel_region_reference(&rb->region, region);
-}
-
-
-void
-intel_renderbuffer_set_hiz_region(struct intel_context *intel,
-				  struct intel_renderbuffer *rb,
-				  struct intel_region *region)
-{
-   intel_region_reference(&rb->hiz_region, region);
-}
-
-
 /**
  * Create a new intel_renderbuffer which corresponds to an on-screen window,
  * not a user-created renderbuffer.

src/mesa/drivers/dri/intel/intel_fbo.h

@@ -155,18 +155,6 @@ intel_framebuffer_has_hiz(struct gl_framebuffer *fb)
    return intel_framebuffer_get_hiz_region(fb) != NULL;
 }
 
-
-extern void
-intel_renderbuffer_set_region(struct intel_context *intel,
-			      struct intel_renderbuffer *irb,
-			      struct intel_region *region);
-
-extern void
-intel_renderbuffer_set_hiz_region(struct intel_context *intel,
-				  struct intel_renderbuffer *rb,
-				  struct intel_region *region);
-
-
 extern struct intel_renderbuffer *
 intel_create_renderbuffer(gl_format format);