CC: Plumb LayerSettings parameter for cc::Layer construction.

android_webview/browser/hardware_renderer.cc

 // Copyright 2014 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 "android_webview/browser/hardware_renderer.h"
 
 #include "android_webview/browser/aw_gl_surface.h"
 #include "android_webview/browser/aw_render_thread_context_provider.h"
 #include "android_webview/browser/child_frame.h"
 #include "android_webview/browser/deferred_gpu_command_service.h"
 #include "android_webview/browser/parent_compositor_draw_constraints.h"
 #include "android_webview/browser/parent_output_surface.h"
 #include "android_webview/browser/shared_renderer_state.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/auto_reset.h"
+#include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_renderer_layer.h"
 #include "cc/layers/layer.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "gpu/command_buffer/client/gl_in_process_context.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "ui/gfx/frame_time.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/transform.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace android_webview {
 
+base::LazyInstance<cc::LayerSettings> g_layer_settings =
+    LAZY_INSTANCE_INITIALIZER;
+
 HardwareRenderer::HardwareRenderer(SharedRendererState* state)
     : shared_renderer_state_(state),
       last_egl_context_(eglGetCurrentContext()),
       stencil_enabled_(false),
       viewport_clip_valid_for_dcheck_(false),
       gl_surface_(new AwGLSurface),
-      root_layer_(cc::Layer::Create()),
+      root_layer_(cc::Layer::Create(LayerSettings())),
       resource_collection_(new cc::DelegatedFrameResourceCollection),
       output_surface_(NULL) {
   DCHECK(last_egl_context_);
 
   resource_collection_->SetClient(this);
 
   cc::LayerTreeSettings settings;
 
   // Should be kept in sync with compositor_impl_android.cc.
   settings.renderer_settings.allow_antialiasing = false;
@@ skipping 29 matching lines @@
   DCHECK_EQ(0u, returned_resources.size());
 #endif  // DCHECK_IS_ON()
 
   resource_collection_->SetClient(NULL);
 
   // Reset draw constraints.
   shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
       ParentCompositorDrawConstraints());
 }
 
+// static
+const cc::LayerSettings& HardwareRenderer::LayerSettings() {
+  return g_layer_settings.Get();

[boliu, 2015/05/22 04:24:07]

My recommendation was not use lazy instance. Just return layerSettings(); here

[loyso (OOO), 2015/05/22 04:34:31]

Done. Really sorry. Misunderstood you in unification. PTAL?

+}
+
 void HardwareRenderer::DidBeginMainFrame() {
   // This is called after OutputSurface is created, but before the impl frame
   // starts. We set the draw constraints here.
   DCHECK(output_surface_);
   DCHECK(viewport_clip_valid_for_dcheck_);
   output_surface_->SetExternalStencilTest(stencil_enabled_);
   output_surface_->SetDrawConstraints(viewport_, clip_);
 }
 
 void HardwareRenderer::CommitFrame() {
@@ skipping 25 matching lines @@
   frame_size_ = frame_size;
 
   if (!frame_provider_.get() || size_changed) {
     if (delegated_layer_.get()) {
       delegated_layer_->RemoveFromParent();
     }
 
     frame_provider_ = new cc::DelegatedFrameProvider(
         resource_collection_.get(), frame->delegated_frame_data.Pass());
 
-    delegated_layer_ = cc::DelegatedRendererLayer::Create(frame_provider_);
+    delegated_layer_ =
+        cc::DelegatedRendererLayer::Create(LayerSettings(), frame_provider_);
     delegated_layer_->SetBounds(frame_size_);
     delegated_layer_->SetIsDrawable(true);
 
     root_layer_->AddChild(delegated_layer_);
   } else {
     frame_provider_->SetFrameData(frame->delegated_frame_data.Pass());
   }
 }
 
 void HardwareRenderer::DrawGL(bool stencil_enabled,
@@ skipping 62 matching lines @@
 }
 
 void HardwareRenderer::UnusedResourcesAreAvailable() {
   cc::ReturnedResourceArray returned_resources;
   resource_collection_->TakeUnusedResourcesForChildCompositor(
       &returned_resources);
   shared_renderer_state_->InsertReturnedResourcesOnRT(returned_resources);
 }
 
 }  // namespace android_webview