cc: Remove support for disabling non-root render surfaces.

cc/trees/layer_tree_host_common.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 60 matching lines @@
     const gfx::Size& device_viewport_size,
     const gfx::Transform& device_transform,
     float device_scale_factor,
     float page_scale_factor,
     const LayerImpl* page_scale_layer,
     const LayerImpl* inner_viewport_scroll_layer,
     const LayerImpl* outer_viewport_scroll_layer,
     const gfx::Vector2dF& elastic_overscroll,
     const LayerImpl* elastic_overscroll_application_layer,
     int max_texture_size,
-    bool can_render_to_separate_surface,
     bool can_adjust_raster_scales,
     bool verify_clip_tree_calculations,
     bool verify_visible_rect_calculations,
     LayerImplList* render_surface_layer_list,
     PropertyTrees* property_trees)
     : root_layer(root_layer),
       device_viewport_size(device_viewport_size),
       device_transform(device_transform),
       device_scale_factor(device_scale_factor),
       page_scale_factor(page_scale_factor),
       page_scale_layer(page_scale_layer),
       inner_viewport_scroll_layer(inner_viewport_scroll_layer),
       outer_viewport_scroll_layer(outer_viewport_scroll_layer),
       elastic_overscroll(elastic_overscroll),
       elastic_overscroll_application_layer(
           elastic_overscroll_application_layer),
       max_texture_size(max_texture_size),
-      can_render_to_separate_surface(can_render_to_separate_surface),
       can_adjust_raster_scales(can_adjust_raster_scales),
       verify_clip_tree_calculations(verify_clip_tree_calculations),
       verify_visible_rect_calculations(verify_visible_rect_calculations),
       render_surface_layer_list(render_surface_layer_list),
       property_trees(property_trees) {}
 
 LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting::
     CalcDrawPropsImplInputsForTesting(LayerImpl* root_layer,
                                       const gfx::Size& device_viewport_size,
                                       const gfx::Transform& device_transform,
                                       float device_scale_factor,
                                       LayerImplList* render_surface_layer_list)
     : CalcDrawPropsImplInputs(root_layer,
                               device_viewport_size,
                               device_transform,
                               device_scale_factor,
                               1.f,
                               NULL,
                               NULL,
                               NULL,
                               gfx::Vector2dF(),
                               NULL,
                               std::numeric_limits<int>::max() / 2,
-                              true,
                               false,
                               true,
                               true,
                               render_surface_layer_list,
                               GetPropertyTrees(root_layer)) {
   DCHECK(root_layer);
   DCHECK(render_surface_layer_list);
 }
 
 LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting::
@@ skipping 144 matching lines @@
 }
 
 enum PropertyTreeOption {
   BUILD_PROPERTY_TREES_IF_NEEDED,
   DONT_BUILD_PROPERTY_TREES
 };
 
 static void ComputeInitialRenderSurfaceLayerList(
     LayerTreeImpl* layer_tree_impl,
     PropertyTrees* property_trees,
-    LayerImplList* render_surface_layer_list,
-    bool can_render_to_separate_surface) {
+    LayerImplList* render_surface_layer_list) {
   // Add all non-skipped surfaces to the initial render surface layer list. Add
   // all non-skipped layers to the layer list of their target surface, and
   // add their content rect to their target surface's accumulated content rect.
   for (LayerImpl* layer : *layer_tree_impl) {
     if (layer->render_surface()) {
       layer->ClearRenderSurfaceLayerList();
       ClearMaskLayersAreDrawnRenderSurfaceLayerListMembers(
           layer->render_surface());
     }
     layer->set_is_drawn_render_surface_layer_list_member(false);
 
     bool is_root = layer_tree_impl->IsRootLayer(layer);
     bool skip_layer = !is_root && draw_property_utils::LayerShouldBeSkipped(
                                       layer, property_trees->transform_tree,
                                       property_trees->effect_tree);
     if (skip_layer)
       continue;
 
-    bool render_to_separate_surface =
-        is_root || (can_render_to_separate_surface && layer->render_surface());
-
+    bool render_to_separate_surface = is_root || layer->render_surface();
     if (render_to_separate_surface) {
       DCHECK(layer->render_surface());
       DCHECK(layer->render_target() == layer->render_surface());
       RenderSurfaceImpl* surface = layer->render_surface();
       surface->ClearAccumulatedContentRect();
       render_surface_layer_list->push_back(layer);
       if (is_root) {
         // The root surface does not contribute to any other surface, it has no
         // target.
         layer->render_surface()->set_contributes_to_drawn_surface(false);
@@ skipping 106 matching lines @@
     }
     SetMaskLayersAreDrawnRenderSurfaceLayerListMembers(surface, property_trees);
     final_surface_list->push_back(layer);
   }
 }
 
 static void CalculateRenderSurfaceLayerList(
     LayerTreeImpl* layer_tree_impl,
     PropertyTrees* property_trees,
     LayerImplList* render_surface_layer_list,
-    const bool can_render_to_separate_surface,
     const int max_texture_size) {
   // This calculates top level Render Surface Layer List, and Layer List for all
   // Render Surfaces.
   // |render_surface_layer_list| is the top level RenderSurfaceLayerList.
 
   LayerImplList initial_render_surface_list;
 
   // First compute an RSLL that might include surfaces that later turn out to
   // have an empty content rect. After surface content rects are computed,
   // produce a final RSLL that omits empty surfaces.
   ComputeInitialRenderSurfaceLayerList(layer_tree_impl, property_trees,
-                                       &initial_render_surface_list,
-                                       can_render_to_separate_surface);
+                                       &initial_render_surface_list);
   ComputeSurfaceContentRects(layer_tree_impl, property_trees,
                              &initial_render_surface_list, max_texture_size);
   ComputeListOfNonEmptySurfaces(layer_tree_impl, property_trees,
                                 &initial_render_surface_list,
                                 render_surface_layer_list);
 }
 
 void CalculateDrawPropertiesInternal(
     LayerTreeHostCommon::CalcDrawPropsImplInputs* inputs,
     PropertyTreeOption property_tree_option) {
@@ skipping 14 matching lines @@
             "LayerTreeHostCommon::ComputeVisibleRectsWithPropertyTrees");
       }
 
       draw_property_utils::BuildPropertyTreesAndComputeVisibleRects(
           inputs->root_layer, inputs->page_scale_layer,
           inputs->inner_viewport_scroll_layer,
           inputs->outer_viewport_scroll_layer,
           inputs->elastic_overscroll_application_layer,
           inputs->elastic_overscroll, inputs->page_scale_factor,
           inputs->device_scale_factor, gfx::Rect(inputs->device_viewport_size),
-          inputs->device_transform, inputs->can_render_to_separate_surface,
-          inputs->property_trees, &visible_layer_list);
+          inputs->device_transform, inputs->property_trees,
+          &visible_layer_list);
 
       // Property trees are normally constructed on the main thread and
       // passed to compositor thread. Source to parent updates on them are not
       // allowed in the compositor thread. Some tests build them on the
       // compositor thread, so we need to explicitly disallow source to parent
       // updates when they are built on compositor thread.
       inputs->property_trees->transform_tree
           .set_source_to_parent_updates_allowed(false);
       if (should_measure_property_tree_performance) {
         TRACE_EVENT_END0(
@@ skipping 24 matching lines @@
       property_trees->clip_tree.SetViewportClip(
           gfx::RectF(gfx::SizeF(inputs->device_viewport_size)));
       float page_scale_factor_for_root =
           inputs->page_scale_layer == inputs->root_layer
               ? inputs->page_scale_factor
               : 1.f;
       property_trees->transform_tree.SetRootTransformsAndScales(
           inputs->device_scale_factor, page_scale_factor_for_root,
           inputs->device_transform, inputs->root_layer->position());
       draw_property_utils::ComputeVisibleRects(
-          inputs->root_layer, inputs->property_trees,
-          inputs->can_render_to_separate_surface, &visible_layer_list);
+          inputs->root_layer, inputs->property_trees, &visible_layer_list);
       break;
     }
   }
 
   if (should_measure_property_tree_performance) {
     TRACE_EVENT_BEGIN0(TRACE_DISABLED_BY_DEFAULT("cc.debug.cdp-perf"),
                        "LayerTreeHostCommon::CalculateDrawProperties");
   }
 
-  DCHECK(inputs->can_render_to_separate_surface ==
-         inputs->property_trees->non_root_surfaces_enabled);
   for (LayerImpl* layer : visible_layer_list) {
     draw_property_utils::ComputeLayerDrawProperties(layer,
                                                     inputs->property_trees);
   }
 
   CalculateRenderSurfaceLayerList(
       inputs->root_layer->layer_tree_impl(), inputs->property_trees,
-      inputs->render_surface_layer_list, inputs->can_render_to_separate_surface,
-      inputs->max_texture_size);
+      inputs->render_surface_layer_list, inputs->max_texture_size);
 
   if (inputs->verify_clip_tree_calculations)
     draw_property_utils::VerifyClipTreeCalculations(visible_layer_list,
                                                     inputs->property_trees);
   if (inputs->verify_visible_rect_calculations)
     draw_property_utils::VerifyVisibleRectsCalculations(visible_layer_list,
                                                         inputs->property_trees);
 
   if (should_measure_property_tree_performance) {
     TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("cc.debug.cdp-perf"),
                      "LayerTreeHostCommon::CalculateDrawProperties");
   }
 
   // A root layer render_surface should always exist after
   // CalculateDrawProperties.
   DCHECK(inputs->root_layer->render_surface());
 }
 
 void LayerTreeHostCommon::CalculateDrawPropertiesForTesting(
     CalcDrawPropsMainInputsForTesting* inputs) {
   LayerList update_layer_list;
-  bool can_render_to_separate_surface = true;
   PropertyTrees* property_trees =
       inputs->root_layer->layer_tree_host()->property_trees();
   Layer* overscroll_elasticity_layer = nullptr;
   gfx::Vector2dF elastic_overscroll;
   PropertyTreeBuilder::BuildPropertyTrees(
       inputs->root_layer, inputs->page_scale_layer,
       inputs->inner_viewport_scroll_layer, inputs->outer_viewport_scroll_layer,
       overscroll_elasticity_layer, elastic_overscroll,
       inputs->page_scale_factor, inputs->device_scale_factor,
       gfx::Rect(inputs->device_viewport_size), inputs->device_transform,
       property_trees);
-  draw_property_utils::UpdatePropertyTrees(property_trees,
-                                           can_render_to_separate_surface);
+  draw_property_utils::UpdatePropertyTrees(property_trees);
   draw_property_utils::FindLayersThatNeedUpdates(
       inputs->root_layer->layer_tree_host(), property_trees,
       &update_layer_list);
 }
 
 void LayerTreeHostCommon::CalculateDrawProperties(
     CalcDrawPropsImplInputs* inputs) {
   CalculateDrawPropertiesInternal(inputs, DONT_BUILD_PROPERTY_TREES);
 
   if (CdpPerfTracingEnabled()) {
@@ skipping 50 matching lines @@
 
 PropertyTrees* GetPropertyTrees(Layer* layer) {
   return layer->layer_tree_host()->property_trees();
 }
 
 PropertyTrees* GetPropertyTrees(LayerImpl* layer) {
   return layer->layer_tree_impl()->property_trees();
 }
 
 }  // namespace cc