[Android WebView] Implement Ubercomp for Render Thread support

android_webview/browser/hardware_renderer.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
 
-#include <queue>
-
+#include "android_webview/browser/hardware_renderer_interface.h"
 #include "android_webview/browser/shared_renderer_state.h"
-#include "base/lazy_instance.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/thread_local.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "cc/layers/delegated_frame_resource_collection.h"
+#include "cc/trees/layer_tree_host_client.h"
+#include "cc/trees/layer_tree_host_single_thread_client.h"
 
 struct AwDrawGLInfo;
 
+namespace cc {
+class DelegatedFrameProvider;
+class DelegatedRendererLayer;
+class Layer;
+class LayerTreeHost;
+}
+
 namespace android_webview {
 
 class AwGLSurface;
-class BrowserViewRendererClient;
+class ParentOutputSurface;
 
-namespace internal {
-class DeferredGpuCommandService;
-}  // namespace internal
-
-class HardwareRenderer {
+class HardwareRenderer : public HardwareRendererInterface,
+                         public cc::LayerTreeHostClient,
+                         public cc::LayerTreeHostSingleThreadClient,
+                         public cc::DelegatedFrameResourceCollectionClient {
  public:
   explicit HardwareRenderer(SharedRendererState* state);
-  ~HardwareRenderer();
+  virtual ~HardwareRenderer();
 
-  bool DrawGL(bool stencil_enabled,
-              int framebuffer_binding_ext,
-              AwDrawGLInfo* draw_info,
-              DrawGLResult* result);
+  // HardwareRendererInterface.
+  virtual bool DrawGL(bool stencil_enabled,
+                      int framebuffer_binding_ext,
+                      AwDrawGLInfo* draw_info,
+                      DrawGLResult* result) OVERRIDE;
+
+  // cc::LayerTreeHostClient.
+  virtual void WillBeginMainFrame(int frame_id) OVERRIDE {}
+  virtual void DidBeginMainFrame() OVERRIDE {}
+  virtual void Animate(base::TimeTicks frame_begin_time) OVERRIDE {}
+  virtual void Layout() OVERRIDE {}
+  virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
+                                   float page_scale) OVERRIDE {}
+  virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(
+      bool fallback) OVERRIDE;
+  virtual void DidInitializeOutputSurface() OVERRIDE {}
+  virtual void WillCommit() OVERRIDE {}
+  virtual void DidCommit() OVERRIDE {}
+  virtual void DidCommitAndDrawFrame() OVERRIDE {}
+  virtual void DidCompleteSwapBuffers() OVERRIDE {}
+
+  // cc::LayerTreeHostSingleThreadClient.
+  virtual void ScheduleComposite() OVERRIDE {}
+  virtual void ScheduleAnimation() OVERRIDE {}
+  virtual void DidPostSwapBuffers() OVERRIDE {}
+  virtual void DidAbortSwapBuffers() OVERRIDE {}
+
+  // cc::DelegatedFrameResourceCollectionClient.
+  virtual void UnusedResourcesAreAvailable() OVERRIDE;
 
  private:
-  friend class internal::DeferredGpuCommandService;
-
-  void SetCompositorMemoryPolicy();
-
   SharedRendererState* shared_renderer_state_;
 
   typedef void* EGLContext;
   EGLContext last_egl_context_;
 
+  int view_width_;
+  int view_height_;
+  gfx::Vector2d scroll_offset_;
+
   scoped_refptr<AwGLSurface> gl_surface_;
 
+  scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
+  scoped_refptr<cc::Layer> root_layer_;
+
+  scoped_refptr<cc::DelegatedFrameResourceCollection> resource_collection_;
+  scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
+  scoped_refptr<cc::DelegatedRendererLayer> layer_;

[danakj, 2014/05/20 21:50:02]

better name please, which layer?

[boliu, 2014/05/21 01:33:26]

Umm...delegated_layer_?

There's the root, and the root only has this one layer as the child.

[danakj, 2014/05/21 15:22:54]

Yes, sure, that's much better :)

+
+  scoped_ptr<ParentOutputSurface> output_surface_holder_;
+  base::WeakPtr<ParentOutputSurface> output_surface_;

[danakj, 2014/05/20 21:50:02]

can name this output_surface_weak_ptr_? then it's obvious at use sites what they
are getting.

[boliu, 2014/05/21 01:33:26]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(HardwareRenderer);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_