src/content/browser/renderer_host/compositor_impl_android.h

   1 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/cancelable_callback.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "cc/trees/layer_tree_host_client.h"
  14 #include "cc/trees/layer_tree_host_single_thread_client.h"
  15 #include "content/browser/android/ui_resource_provider_impl.h"
  16 #include "content/browser/renderer_host/image_transport_factory_android.h"
  17 #include "content/common/content_export.h"
  18 #include "content/public/browser/android/compositor.h"
  19 #include "third_party/khronos/GLES2/gl2.h"
  20 #include "ui/base/android/system_ui_resource_manager.h"
  21 #include "ui/base/android/window_android_compositor.h"
  22
  23 class SkBitmap;
  24 struct ANativeWindow;
  25
  26 namespace cc {
  27 class Layer;
  28 class LayerTreeHost;
  29 }
  30
  31 namespace content {
  32 class CompositorClient;
  33 class UIResourceProvider;
  34
  35 // -----------------------------------------------------------------------------
  36 // Browser-side compositor that manages a tree of content and UI layers.
  37 // -----------------------------------------------------------------------------
  38 class CONTENT_EXPORT CompositorImpl
  39     : public Compositor,
  40       public cc::LayerTreeHostClient,
  41       public cc::LayerTreeHostSingleThreadClient,
  42       public ImageTransportFactoryAndroidObserver,
  43       public ui::WindowAndroidCompositor {
  44  public:
  45   CompositorImpl(CompositorClient* client, gfx::NativeWindow root_window);
  46   virtual ~CompositorImpl();
  47
  48   static bool IsInitialized();
  49
  50   // Creates a surface texture and returns a surface texture id. Returns -1 on
  51   // failure.
  52   static int CreateSurfaceTexture(int child_process_id);
  53
  54   // Destroy all surface textures associated with |child_process_id|.
  55   static void DestroyAllSurfaceTextures(int child_process_id);
  56
  57  private:
  58   // Compositor implementation.
  59   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) OVERRIDE;
  60   virtual void SetWindowSurface(ANativeWindow* window) OVERRIDE;
  61   virtual void SetSurface(jobject surface) OVERRIDE;
  62   virtual void SetVisible(bool visible) OVERRIDE;
  63   virtual void setDeviceScaleFactor(float factor) OVERRIDE;
  64   virtual void SetWindowBounds(const gfx::Size& size) OVERRIDE;
  65   virtual void SetHasTransparentBackground(bool flag) OVERRIDE;
  66   virtual void SetNeedsComposite() OVERRIDE;
  67   virtual UIResourceProvider& GetUIResourceProvider() OVERRIDE;
  68
  69   // LayerTreeHostClient implementation.
  70   virtual void WillBeginMainFrame(int frame_id) OVERRIDE {}
  71   virtual void DidBeginMainFrame() OVERRIDE {}
  72   virtual void Animate(base::TimeTicks frame_begin_time) OVERRIDE {}
  73   virtual void Layout() OVERRIDE;
  74   virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
  75                                    float page_scale) OVERRIDE {}
  76   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(bool fallback)
  77       OVERRIDE;
  78   virtual void DidInitializeOutputSurface() OVERRIDE {}
  79   virtual void WillCommit() OVERRIDE {}
  80   virtual void DidCommit() OVERRIDE;
  81   virtual void DidCommitAndDrawFrame() OVERRIDE {}
  82   virtual void DidCompleteSwapBuffers() OVERRIDE;
  83
  84   // LayerTreeHostSingleThreadClient implementation.
  85   virtual void ScheduleComposite() OVERRIDE;
  86   virtual void ScheduleAnimation() OVERRIDE;
  87   virtual void DidPostSwapBuffers() OVERRIDE;
  88   virtual void DidAbortSwapBuffers() OVERRIDE;
  89
  90   // ImageTransportFactoryAndroidObserver implementation.
  91   virtual void OnLostResources() OVERRIDE;
  92
  93   // WindowAndroidCompositor implementation.
  94   virtual void AttachLayerForReadback(scoped_refptr<cc::Layer> layer) OVERRIDE;
  95   virtual void RequestCopyOfOutputOnRootLayer(
  96       scoped_ptr<cc::CopyOutputRequest> request) OVERRIDE;
  97   virtual void OnVSync(base::TimeTicks frame_time,
  98                        base::TimeDelta vsync_period) OVERRIDE;
  99   virtual void SetNeedsAnimate() OVERRIDE;
 100   virtual ui::SystemUIResourceManager& GetSystemUIResourceManager() OVERRIDE;
 101
 102   enum CompositingTrigger {
 103     DO_NOT_COMPOSITE,
 104     COMPOSITE_IMMEDIATELY,
 105     COMPOSITE_EVENTUALLY,
 106   };
 107   void PostComposite(CompositingTrigger trigger);
 108   void Composite(CompositingTrigger trigger);
 109
 110   bool WillCompositeThisFrame() const {
 111     return current_composite_task_ &&
 112            !current_composite_task_->callback().is_null();
 113   }
 114   bool DidCompositeThisFrame() const {
 115     return current_composite_task_ &&
 116            current_composite_task_->callback().is_null();
 117   }
 118   bool WillComposite() const {
 119     return WillCompositeThisFrame() ||
 120            composite_on_vsync_trigger_ != DO_NOT_COMPOSITE;
 121   }
 122   void CancelComposite() {
 123     DCHECK(WillComposite());
 124     if (WillCompositeThisFrame())
 125       current_composite_task_->Cancel();
 126     current_composite_task_.reset();
 127     composite_on_vsync_trigger_ = DO_NOT_COMPOSITE;
 128     will_composite_immediately_ = false;
 129   }
 130   void OnGpuChannelEstablished();
 131
 132   // root_layer_ is the persistent internal root layer, while subroot_layer_
 133   // is the one attached by the compositor client.
 134   scoped_refptr<cc::Layer> root_layer_;
 135   scoped_refptr<cc::Layer> subroot_layer_;
 136
 137   scoped_ptr<cc::LayerTreeHost> host_;
 138   content::UIResourceProviderImpl ui_resource_provider_;
 139
 140   gfx::Size size_;
 141   bool has_transparent_background_;
 142   float device_scale_factor_;
 143
 144   ANativeWindow* window_;
 145   int surface_id_;
 146
 147   CompositorClient* client_;
 148
 149   gfx::NativeWindow root_window_;
 150
 151   // Used locally to track whether a call to LTH::Composite() did result in
 152   // a posted SwapBuffers().
 153   bool did_post_swapbuffers_;
 154
 155   // Used locally to inhibit ScheduleComposite() during Layout().
 156   bool ignore_schedule_composite_;
 157
 158   // Whether we need to composite in general because of any invalidation or
 159   // explicit request.
 160   bool needs_composite_;
 161
 162   // Whether we need to update animations on the next composite.
 163   bool needs_animate_;
 164
 165   // Whether we posted a task and are about to composite.
 166   bool will_composite_immediately_;
 167
 168   // How we should schedule Composite during the next vsync.
 169   CompositingTrigger composite_on_vsync_trigger_;
 170
 171   // The Composite operation scheduled for the current vsync interval.
 172   scoped_ptr<base::CancelableClosure> current_composite_task_;
 173
 174   // The number of SwapBuffer calls that have not returned and ACK'd from
 175   // the GPU thread.
 176   unsigned int pending_swapbuffers_;
 177
 178   base::TimeDelta vsync_period_;
 179   base::TimeTicks last_vsync_;
 180
 181   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 182
 183   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 184 };
 185
 186 } // namespace content
 187
 188 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_