ContextProvider in OutputSurface

cc/output/output_surface.h

 // Copyright 2012 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 CC_OUTPUT_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/software_output_device.h"
 #include "cc/scheduler/frame_rate_controller.h"
-#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 
 namespace base { class SingleThreadTaskRunner; }
 
 namespace ui { struct LatencyInfo; }
 
 namespace gfx {
 class Rect;
 class Size;
 class Transform;
 }
 
 namespace cc {
 
 class CompositorFrame;
 class CompositorFrameAck;
 struct ManagedMemoryPolicy;
 class OutputSurfaceClient;
-class OutputSurfaceCallbacks;
 
 // Represents the output surface for a compositor. The compositor owns
 // and manages its destruction. Its lifetime is:
 //   1. Created on the main thread by the LayerTreeHost through its client.
 //   2. Passed to the compositor thread and bound to a client via BindToClient.
 //      From here on, it will only be used on the compositor thread.
 //   3. If the 3D context is lost, then the compositor will delete the output
 //      surface (on the compositor thread) and go back to step 1.
 class CC_EXPORT OutputSurface : public FrameRateControllerClient {
  public:
   enum {
     DEFAULT_MAX_FRAMES_PENDING = 2
   };
 
-  explicit OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D> context3d);
+  explicit OutputSurface(scoped_refptr<ContextProvider> context_provider);
 
   explicit OutputSurface(scoped_ptr<cc::SoftwareOutputDevice> software_device);
 
-  OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D> context3d,
+  OutputSurface(scoped_refptr<ContextProvider> context_provider,
                 scoped_ptr<cc::SoftwareOutputDevice> software_device);
 
   virtual ~OutputSurface();
 
   struct Capabilities {
     Capabilities()
         : delegated_rendering(false),
           max_frames_pending(0),
           deferred_gl_initialization(false),
           draw_and_swap_full_viewport_every_frame(false),
           adjust_deadline_for_parent(true) {}
     bool delegated_rendering;
     int max_frames_pending;
     bool deferred_gl_initialization;
     bool draw_and_swap_full_viewport_every_frame;
     // This doesn't handle the <webview> case, but once BeginFrame is
     // supported natively, we shouldn't need adjust_deadline_for_parent.
     bool adjust_deadline_for_parent;
   };
 
   const Capabilities& capabilities() const {
     return capabilities_;
   }
 
   // Obtain the 3d context or the software device associated with this output
   // surface. Either of these may return a null pointer, but not both.
   // In the event of a lost context, the entire output surface should be
   // recreated.
-  WebKit::WebGraphicsContext3D* context3d() const {
-    return context3d_.get();
+  scoped_refptr<ContextProvider> context_provider() const {
+    return context_provider_.get();
   }
-
   SoftwareOutputDevice* software_device() const {
     return software_device_.get();
   }
 
   // In the case where both the context3d and software_device are present
   // (namely Android WebView), this is called to determine whether the software
   // device should be used on the current frame.
   virtual bool ForcedDrawToSoftwareDevice() const;
 
   // Called by the compositor on the compositor thread. This is a place where
@@ skipping 24 matching lines @@
 
   // Notifies frame-rate smoothness preference. If true, all non-critical
   // processing should be stopped, or lowered in priority.
   virtual void UpdateSmoothnessTakesPriority(bool prefer_smoothness) {}
 
   // Requests a BeginFrame notification from the output surface. The
   // notification will be delivered by calling
   // OutputSurfaceClient::BeginFrame until the callback is disabled.
   virtual void SetNeedsBeginFrame(bool enable);
 
+  bool HasClient() { return !!client_; }
+
  protected:
   // Synchronously initialize context3d and enter hardware mode.
   // This can only supported in threaded compositing mode.
   // |offscreen_context_provider| should match what is returned by
   // LayerTreeClient::OffscreenContextProviderForCompositorThread.
-  bool InitializeAndSetContext3D(
-      scoped_ptr<WebKit::WebGraphicsContext3D> context3d,
+  bool InitializeAndSetContext3d(
+      scoped_refptr<ContextProvider> context_provider,
       scoped_refptr<ContextProvider> offscreen_context_provider);
   void ReleaseGL();
 
   void PostSwapBuffersComplete();
 
   struct cc::OutputSurface::Capabilities capabilities_;
-  scoped_ptr<OutputSurfaceCallbacks> callbacks_;
-  scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
+  scoped_refptr<ContextProvider> context_provider_;
   scoped_ptr<cc::SoftwareOutputDevice> software_device_;
   bool has_gl_discard_backbuffer_;
   bool has_swap_buffers_complete_callback_;
   gfx::Size surface_size_;
   float device_scale_factor_;
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   // The FrameRateController is deprecated.
   // Platforms should move to native BeginFrames instead.
   void OnVSyncParametersChanged(base::TimeTicks timebase,
                                 base::TimeDelta interval);
   virtual void FrameRateControllerTick(bool throttled,
                                        const BeginFrameArgs& args) OVERRIDE;
   scoped_ptr<FrameRateController> frame_rate_controller_;
   int max_frames_pending_;
   int pending_swap_buffers_;
   bool needs_begin_frame_;
   bool begin_frame_pending_;
 
   // Forwarded to OutputSurfaceClient but threaded through OutputSurface
   // first so OutputSurface has a chance to update the FrameRateController
-  bool HasClient() { return !!client_; }
   void SetNeedsRedrawRect(gfx::Rect damage_rect);
   void BeginFrame(const BeginFrameArgs& args);
   void DidSwapBuffers();
   void OnSwapBuffersComplete(const CompositorFrameAck* ack);
   void DidLoseOutputSurface();
   void SetExternalStencilTest(bool enabled);
   void SetExternalDrawConstraints(const gfx::Transform& transform,
                                   gfx::Rect viewport);
 
   // virtual for testing.
   virtual base::TimeDelta RetroactiveBeginFramePeriod();
   virtual void PostCheckForRetroactiveBeginFrame();
   void CheckForRetroactiveBeginFrame();
 
  private:
   OutputSurfaceClient* client_;
   friend class OutputSurfaceCallbacks;
 
-  void SetContext3D(scoped_ptr<WebKit::WebGraphicsContext3D> context3d);
-  void ResetContext3D();
+  void SetUpContext3d();
+  void ResetContext3d();
   void SetMemoryPolicy(const ManagedMemoryPolicy& policy,
                        bool discard_backbuffer_when_not_visible);
 
   // This stores a BeginFrame that we couldn't process immediately, but might
   // process retroactively in the near future.
   BeginFrameArgs skipped_begin_frame_args_;
 
   // check_for_retroactive_begin_frame_pending_ is used to avoid posting
   // redundant checks for a retroactive BeginFrame.
   bool check_for_retroactive_begin_frame_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_