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/common/gpu/client/context_provider_command_buffer.h"
  19 #include "content/public/browser/android/compositor.h"
  20 #include "gpu/command_buffer/common/capabilities.h"
  21 #include "third_party/khronos/GLES2/gl2.h"
  22 #include "ui/base/android/system_ui_resource_manager.h"
  23 #include "ui/base/android/window_android_compositor.h"
  24
  25 class SkBitmap;
  26 struct ANativeWindow;
  27
  28 namespace cc {
  29 class Layer;
  30 class LayerTreeHost;
  31 }
  32
  33 namespace content {
  34 class CompositorClient;
  35 class UIResourceProvider;
  36
  37 // -----------------------------------------------------------------------------
  38 // Browser-side compositor that manages a tree of content and UI layers.
  39 // -----------------------------------------------------------------------------
  40 class CONTENT_EXPORT CompositorImpl
  41     : public Compositor,
  42       public cc::LayerTreeHostClient,
  43       public cc::LayerTreeHostSingleThreadClient,
  44       public ImageTransportFactoryAndroidObserver,
  45       public ui::WindowAndroidCompositor {
  46  public:
  47   CompositorImpl(CompositorClient* client, gfx::NativeWindow root_window);
  48   virtual ~CompositorImpl();
  49
  50   static bool IsInitialized();
  51
  52   // Creates a surface texture and returns a surface texture id. Returns -1 on
  53   // failure.
  54   static int CreateSurfaceTexture(int child_process_id);
  55
  56   // Destroy all surface textures associated with |child_process_id|.
  57   static void DestroyAllSurfaceTextures(int child_process_id);
  58
  59   void PopulateGpuCapabilities(gpu::Capabilities gpu_capabilities);
  60
  61  private:
  62   // Compositor implementation.
  63   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) OVERRIDE;
  64   virtual void SetWindowSurface(ANativeWindow* window) OVERRIDE;
  65   virtual void SetSurface(jobject surface) OVERRIDE;
  66   virtual void SetVisible(bool visible) OVERRIDE;
  67   virtual void setDeviceScaleFactor(float factor) OVERRIDE;
  68   virtual void SetWindowBounds(const gfx::Size& size) OVERRIDE;
  69   virtual void SetHasTransparentBackground(bool flag) OVERRIDE;
  70   virtual void SetNeedsComposite() OVERRIDE;
  71   virtual UIResourceProvider& GetUIResourceProvider() OVERRIDE;
  72
  73   // LayerTreeHostClient implementation.
  74   virtual void WillBeginMainFrame(int frame_id) OVERRIDE {}
  75   virtual void DidBeginMainFrame() OVERRIDE {}
  76   virtual void BeginMainFrame(const cc::BeginFrameArgs& args) OVERRIDE {}
  77   virtual void Layout() OVERRIDE;
  78   virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
  79                                    float page_scale) OVERRIDE {}
  80   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(bool fallback)
  81       OVERRIDE;
  82   virtual void DidInitializeOutputSurface() OVERRIDE {}
  83   virtual void WillCommit() OVERRIDE {}
  84   virtual void DidCommit() OVERRIDE;
  85   virtual void DidCommitAndDrawFrame() OVERRIDE {}
  86   virtual void DidCompleteSwapBuffers() OVERRIDE;
  87
  88   // LayerTreeHostSingleThreadClient implementation.
  89   virtual void ScheduleComposite() OVERRIDE;
  90   virtual void ScheduleAnimation() OVERRIDE;
  91   virtual void DidPostSwapBuffers() OVERRIDE;
  92   virtual void DidAbortSwapBuffers() OVERRIDE;
  93
  94   // ImageTransportFactoryAndroidObserver implementation.
  95   virtual void OnLostResources() OVERRIDE;
  96
  97   // WindowAndroidCompositor implementation.
  98   virtual void AttachLayerForReadback(scoped_refptr<cc::Layer> layer) OVERRIDE;
  99   virtual void RequestCopyOfOutputOnRootLayer(
 100       scoped_ptr<cc::CopyOutputRequest> request) OVERRIDE;
 101   virtual void OnVSync(base::TimeTicks frame_time,
 102                        base::TimeDelta vsync_period) OVERRIDE;
 103   virtual void SetNeedsAnimate() OVERRIDE;
 104   virtual ui::SystemUIResourceManager& GetSystemUIResourceManager() OVERRIDE;
 105
 106   enum CompositingTrigger {
 107     DO_NOT_COMPOSITE,
 108     COMPOSITE_IMMEDIATELY,
 109     COMPOSITE_EVENTUALLY,
 110   };
 111   void PostComposite(CompositingTrigger trigger);
 112   void Composite(CompositingTrigger trigger);
 113
 114   bool WillCompositeThisFrame() const {
 115     return current_composite_task_ &&
 116            !current_composite_task_->callback().is_null();
 117   }
 118   bool DidCompositeThisFrame() const {
 119     return current_composite_task_ &&
 120            current_composite_task_->callback().is_null();
 121   }
 122   bool WillComposite() const {
 123     return WillCompositeThisFrame() ||
 124            composite_on_vsync_trigger_ != DO_NOT_COMPOSITE;
 125   }
 126   void CancelComposite() {
 127     DCHECK(WillComposite());
 128     if (WillCompositeThisFrame())
 129       current_composite_task_->Cancel();
 130     current_composite_task_.reset();
 131     composite_on_vsync_trigger_ = DO_NOT_COMPOSITE;
 132     will_composite_immediately_ = false;
 133   }
 134   void OnGpuChannelEstablished();
 135
 136   // root_layer_ is the persistent internal root layer, while subroot_layer_
 137   // is the one attached by the compositor client.
 138   scoped_refptr<cc::Layer> root_layer_;
 139   scoped_refptr<cc::Layer> subroot_layer_;
 140
 141   scoped_ptr<cc::LayerTreeHost> host_;
 142   content::UIResourceProviderImpl ui_resource_provider_;
 143
 144   gfx::Size size_;
 145   bool has_transparent_background_;
 146   float device_scale_factor_;
 147
 148   ANativeWindow* window_;
 149   int surface_id_;
 150
 151   CompositorClient* client_;
 152
 153   gfx::NativeWindow root_window_;
 154
 155   // Used locally to track whether a call to LTH::Composite() did result in
 156   // a posted SwapBuffers().
 157   bool did_post_swapbuffers_;
 158
 159   // Used locally to inhibit ScheduleComposite() during Layout().
 160   bool ignore_schedule_composite_;
 161
 162   // Whether we need to composite in general because of any invalidation or
 163   // explicit request.
 164   bool needs_composite_;
 165
 166   // Whether we need to update animations on the next composite.
 167   bool needs_animate_;
 168
 169   // Whether we posted a task and are about to composite.
 170   bool will_composite_immediately_;
 171
 172   // How we should schedule Composite during the next vsync.
 173   CompositingTrigger composite_on_vsync_trigger_;
 174
 175   // The Composite operation scheduled for the current vsync interval.
 176   scoped_ptr<base::CancelableClosure> current_composite_task_;
 177
 178   // The number of SwapBuffer calls that have not returned and ACK'd from
 179   // the GPU thread.
 180   unsigned int pending_swapbuffers_;
 181
 182   base::TimeDelta vsync_period_;
 183   base::TimeTicks last_vsync_;
 184
 185   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 186
 187   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 188 };
 189
 190 } // namespace content
 191
 192 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_