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 "base/memory/weak_ptr.h"
   9 #include "base/message_loop/message_loop_proxy.h"
  10 #include "base/synchronization/lock.h"
  11 #include "cc/output/compositor_frame.h"
  12 #include "cc/output/compositor_frame_ack.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/geometry/vector2d.h"
  15
  16 namespace cc {
  17 class CompositorFrameAck;
  18 }
  19
  20 namespace gpu {
  21 class GLInProcessContext;
  22 }
  23
  24 namespace android_webview {
  25
  26 class BrowserViewRendererClient;
  27
  28 // Set by BrowserViewRenderer and read by HardwareRenderer.
  29 struct DrawGLInput {
  30   gfx::Vector2d scroll_offset;
  31   int width;
  32   int height;
  33   cc::CompositorFrame frame;
  34
  35   DrawGLInput();
  36   ~DrawGLInput();
  37 };
  38
  39 // This class holds renderer state that is shared between UI and RT threads.
  40 // Android framework will block the UI thread when RT is drawing, so no locking
  41 // is needed in this class. In the interim, this class is also responsible for
  42 // thread hopping that should eventually be removed once RT support work is
  43 // complete.
  44 class SharedRendererState {
  45  public:
  46   SharedRendererState(scoped_refptr<base::MessageLoopProxy> ui_loop,
  47                       BrowserViewRendererClient* client);
  48   ~SharedRendererState();
  49
  50   void ClientRequestDrawGL();
  51
  52   void SetDrawGLInput(scoped_ptr<DrawGLInput> input);
  53   scoped_ptr<DrawGLInput> PassDrawGLInput();
  54
  55   // Set by UI and read by RT.
  56   void SetHardwareAllowed(bool allowed);
  57   bool IsHardwareAllowed() const;
  58
  59   // Set by RT and read by UI.
  60   void SetHardwareInitialized(bool initialized);
  61   bool IsHardwareInitialized() const;
  62
  63   void SetSharedContext(gpu::GLInProcessContext* context);
  64   gpu::GLInProcessContext* GetSharedContext() const;
  65
  66   void ReturnResources(const cc::TransferableResourceArray& input);
  67   void InsertReturnedResources(const cc::ReturnedResourceArray& resources);
  68   void SwapReturnedResources(cc::ReturnedResourceArray* resources);
  69   bool ReturnedResourcesEmpty() const;
  70
  71  private:
  72   void ClientRequestDrawGLOnUIThread();
  73
  74   scoped_refptr<base::MessageLoopProxy> ui_loop_;
  75   // TODO(boliu): Remove |client_on_ui_| from shared state.
  76   BrowserViewRendererClient* client_on_ui_;
  77   base::WeakPtrFactory<SharedRendererState> weak_factory_on_ui_thread_;
  78   base::WeakPtr<SharedRendererState> ui_thread_weak_ptr_;
  79
  80   // Accessed by both UI and RT thread.
  81   mutable base::Lock lock_;
  82   scoped_ptr<DrawGLInput> draw_gl_input_;
  83   bool hardware_allowed_;
  84   bool hardware_initialized_;
  85   gpu::GLInProcessContext* share_context_;
  86   cc::ReturnedResourceArray returned_resources_;
  87 };
  88
  89 }  // namespace android_webview
  90
  91 #endif  // ANDROID_WEBVIEW_BROWSER_SHARED_RENDERER_STATE_H_