Part 2: WIP Refactor Webview graphics related code

android_webview/browser/shared_renderer_state.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_SHARED_RENDERER_STATE_H_
 #define ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_
 
+#include "android_webview/browser/gl_view_renderer_manager.h"
 #include "android_webview/browser/parent_compositor_draw_constraints.h"
 #include "base/cancelable_callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/vector2d.h"
 
+struct AwDrawGLInfo;
+
 namespace android_webview {
 
 namespace internal {
 class RequestDrawGLTracker;
 }
 
 class BrowserViewRenderer;
+class HardwareRenderer;
 class InsideHardwareReleaseReset;
 
 // This class is used to pass data between UI thread and RenderThread.
-// TODO(hush): this class should own HardwareRenderer.
 class SharedRendererState {
  public:
   SharedRendererState(
       const scoped_refptr<base::SingleThreadTaskRunner>& ui_loop,
       BrowserViewRenderer* browser_view_renderer);
   ~SharedRendererState();
 
+  // This function can be called from any thread.
   void ClientRequestDrawGL();
-  void DidDrawGLProcess();
 
+  // UI thread methods.
   void SetScrollOffsetOnUI(gfx::Vector2d scroll_offset);
-  gfx::Vector2d GetScrollOffsetOnRT();
-
   bool HasCompositorFrameOnUI() const;
   void SetCompositorFrameOnUI(scoped_ptr<cc::CompositorFrame> frame,
                               bool force_commit);
-  // Right now this method is called on both UI and RT.
-  // TODO(hush): Make it only called from RT.
-  scoped_ptr<cc::CompositorFrame> PassCompositorFrame();
+  void InitializeHardwareDrawIfNeededOnUI();
+  void ReleaseHardwareDrawIfNeededOnUI();
+  ParentCompositorDrawConstraints GetParentDrawConstraintsOnUI() const;
+  void SetForceInvalidateOnNextDrawGLOnUI(
+      bool needs_force_invalidate_on_next_draw_gl);
+  bool NeedsForceInvalidateOnNextDrawGLOnUI() const;
+  void SwapReturnedResourcesOnUI(cc::ReturnedResourceArray* resources);
+  bool ReturnedResourcesEmptyOnUI() const;
+
+  // RT thread methods.
+  gfx::Vector2d GetScrollOffsetOnRT();
+  scoped_ptr<cc::CompositorFrame> PassCompositorFrameOnRT();
   bool ForceCommitOnRT() const;
-
-  // TODO(hush): this will be private after DrawGL moves to this class.
-  bool IsInsideHardwareRelease() const;
+  void DrawGL(AwDrawGLInfo* draw_info);
   // Returns true if the draw constraints are updated.
   bool UpdateDrawConstraintsOnRT(
       const ParentCompositorDrawConstraints& parent_draw_constraints);
   void PostExternalDrawConstraintsToChildCompositorOnRT(
       const ParentCompositorDrawConstraints& parent_draw_constraints);
-  ParentCompositorDrawConstraints GetParentDrawConstraintsOnUI() const;
-
   void DidSkipCommitFrameOnRT();
-  void SetForceInvalidateOnNextDrawGLOnUI(
-      bool needs_force_invalidate_on_next_draw_gl);
-  bool NeedsForceInvalidateOnNextDrawGLOnUI() const;
-
   void InsertReturnedResourcesOnRT(const cc::ReturnedResourceArray& resources);
-  void SwapReturnedResourcesOnUI(cc::ReturnedResourceArray* resources);
-  bool ReturnedResourcesEmpty() const;
 
  private:
-  friend class InsideHardwareReleaseReset;
   friend class internal::RequestDrawGLTracker;
 
+  // RT thread method.
+  void DidDrawGLProcess();
+
+  // UI thread methods.
   void ResetRequestDrawGLCallback();
-  void ClientRequestDrawGLOnUIThread();
-  void UpdateParentDrawConstraintsOnUIThread();
+  void ClientRequestDrawGLOnUI();
+  void UpdateParentDrawConstraintsOnUI();
   void DidSkipCommitFrameOnUI();
+  void ReturnUnusedResourceOnUI();
+  bool IsInsideHardwareRelease() const;
   void SetInsideHardwareRelease(bool inside);
 
+  // Accessed by UI thread.
   scoped_refptr<base::SingleThreadTaskRunner> ui_loop_;
   BrowserViewRenderer* browser_view_renderer_;
   base::WeakPtr<SharedRendererState> ui_thread_weak_ptr_;
   base::CancelableClosure request_draw_gl_cancelable_closure_;
+  GLViewRendererManager::Key renderer_manager_key_;

[boliu, 2014/10/28 19:49:43]

This is both UI and RT

Although...I think this can almost be moved to RT exclusively. But let's do that
after we have tests.

[hush (inactive), 2014/10/29 19:57:04]

I see. Make the pushback and removal of the key happen on RT.
I will add a TODO here.

+
+  // Accessed by RT thread.
+  scoped_ptr<HardwareRenderer> hardware_renderer_;
 
   // Accessed by both UI and RT thread.
   mutable base::Lock lock_;
   gfx::Vector2d scroll_offset_;
   scoped_ptr<cc::CompositorFrame> compositor_frame_;
   bool force_commit_;
   bool inside_hardware_release_;
   bool needs_force_invalidate_on_next_draw_gl_;
   ParentCompositorDrawConstraints parent_draw_constraints_;
   cc::ReturnedResourceArray returned_resources_;
   base::Closure request_draw_gl_closure_;
 
   base::WeakPtrFactory<SharedRendererState> weak_factory_on_ui_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedRendererState);
 };
 
-class InsideHardwareReleaseReset {
- public:
-  explicit InsideHardwareReleaseReset(
-      SharedRendererState* shared_renderer_state);
-  ~InsideHardwareReleaseReset();
-
- private:
-  SharedRendererState* shared_renderer_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(InsideHardwareReleaseReset);
-};
-
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_