android_webview/browser/shared_renderer_state.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_
   6 #define ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_
   7
   8 #include "android_webview/browser/gl_view_renderer_manager.h"
   9 #include "android_webview/browser/parent_compositor_draw_constraints.h"
  10 #include "base/cancelable_callback.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/synchronization/lock.h"
  14 #include "cc/output/compositor_frame_ack.h"
  15 #include "ui/gfx/geometry/rect.h"
  16 #include "ui/gfx/geometry/vector2d.h"
  17
  18 struct AwDrawGLInfo;
  19
  20 namespace android_webview {
  21
  22 namespace internal {
  23 class RequestDrawGLTracker;
  24 }
  25
  26 class BrowserViewRenderer;
  27 class ChildFrame;
  28 class HardwareRenderer;
  29 class InsideHardwareReleaseReset;
  30
  31 // This class is used to pass data between UI thread and RenderThread.
  32 class SharedRendererState {
  33  public:
  34   SharedRendererState(
  35       const scoped_refptr<base::SingleThreadTaskRunner>& ui_loop,
  36       BrowserViewRenderer* browser_view_renderer);
  37   ~SharedRendererState();
  38
  39   // This function can be called from any thread.
  40   void ClientRequestDrawGL();
  41
  42   // UI thread methods.
  43   void SetScrollOffsetOnUI(gfx::Vector2d scroll_offset);
  44   void SetCompositorFrameOnUI(scoped_ptr<ChildFrame> frame);
  45   void InitializeHardwareDrawIfNeededOnUI();
  46   void ReleaseHardwareDrawIfNeededOnUI();
  47   ParentCompositorDrawConstraints GetParentDrawConstraintsOnUI() const;
  48   void SwapReturnedResourcesOnUI(cc::ReturnedResourceArray* resources);
  49   bool ReturnedResourcesEmptyOnUI() const;
  50   scoped_ptr<ChildFrame> PassUncommittedFrameOnUI();
  51   void DeleteHardwareRendererOnUI();
  52
  53   // RT thread methods.
  54   gfx::Vector2d GetScrollOffsetOnRT();
  55   scoped_ptr<ChildFrame> PassCompositorFrameOnRT();
  56   void DrawGL(AwDrawGLInfo* draw_info);
  57   void PostExternalDrawConstraintsToChildCompositorOnRT(
  58       const ParentCompositorDrawConstraints& parent_draw_constraints);
  59   void InsertReturnedResourcesOnRT(const cc::ReturnedResourceArray& resources);
  60
  61  private:
  62   friend class internal::RequestDrawGLTracker;
  63   class InsideHardwareReleaseReset {
  64    public:
  65     explicit InsideHardwareReleaseReset(
  66         SharedRendererState* shared_renderer_state);
  67     ~InsideHardwareReleaseReset();
  68
  69    private:
  70     SharedRendererState* shared_renderer_state_;
  71   };
  72
  73   // RT thread method.
  74   void DidDrawGLProcess();
  75
  76   // UI thread methods.
  77   void ResetRequestDrawGLCallback();
  78   void ClientRequestDrawGLOnUI();
  79   void UpdateParentDrawConstraintsOnUI();
  80   bool IsInsideHardwareRelease() const;
  81   void SetInsideHardwareRelease(bool inside);
  82   void ReleaseCompositorResourcesIfNeededOnUI(bool release_hardware_draw);
  83
  84   // Accessed by UI thread.
  85   scoped_refptr<base::SingleThreadTaskRunner> ui_loop_;
  86   BrowserViewRenderer* browser_view_renderer_;
  87   base::WeakPtr<SharedRendererState> ui_thread_weak_ptr_;
  88   base::CancelableClosure request_draw_gl_cancelable_closure_;
  89
  90   // Accessed by RT thread.
  91   scoped_ptr<HardwareRenderer> hardware_renderer_;
  92
  93   // This is accessed by both UI and RT now. TODO(hush): move to RT only.
  94   GLViewRendererManager::Key renderer_manager_key_;
  95
  96   // Accessed by both UI and RT thread.
  97   mutable base::Lock lock_;
  98   gfx::Vector2d scroll_offset_;
  99   scoped_ptr<ChildFrame> child_frame_;
 100   bool inside_hardware_release_;
 101   ParentCompositorDrawConstraints parent_draw_constraints_;
 102   cc::ReturnedResourceArray returned_resources_;
 103   base::Closure request_draw_gl_closure_;
 104
 105   base::WeakPtrFactory<SharedRendererState> weak_factory_on_ui_thread_;
 106
 107   DISALLOW_COPY_AND_ASSIGN(SharedRendererState);
 108 };
 109
 110 }  // namespace android_webview
 111
 112 #endif  // ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_