cc: Add BeginFrameArgs

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"
@@ skipping 23 matching lines @@
 
 // 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_ptr<cc::SoftwareOutputDevice> software_device);
 
   OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D> context3d,
                 scoped_ptr<cc::SoftwareOutputDevice> software_device);
 
   virtual ~OutputSurface();
 
   struct Capabilities {
     Capabilities()
         : delegated_rendering(false),
           max_frames_pending(0),
-          deferred_gl_initialization(false) {}
-
+          deferred_gl_initialization(false),
+          has_parent_compositor(true) {}

[piman, 2013/06/18 19:43:31]

nit: as discussed, maybe rename as 'adjust_deadline_for_parent' or something to
be explicit about what this controls.

     bool delegated_rendering;
     int max_frames_pending;
     bool deferred_gl_initialization;
+    // This doesn't handle the <webview> case, but once BeginFrame is
+    // supported natively, we shouldn't need has_parent_compositor.
+    bool has_parent_compositor;
   };
 
   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.
@@ skipping 63 matching lines @@
   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) OVERRIDE;
+  virtual void FrameRateControllerTick(bool throttled,
+                                       const BeginFrameArgs& args) OVERRIDE;
   scoped_ptr<FrameRateController> frame_rate_controller_;
   int max_frames_pending_;
   int pending_swap_buffers_;
   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(base::TimeTicks frame_time);
+  void BeginFrame(const BeginFrameArgs& args);
   void DidSwapBuffers();
   void OnSwapBuffersComplete(const CompositorFrameAck* ack);
   void DidLoseOutputSurface();
   void SetExternalDrawConstraints(const gfx::Transform& transform,
                                   gfx::Rect viewport);
 
  private:
   OutputSurfaceClient* client_;
   friend class OutputSurfaceCallbacks;
 
   void SetContext3D(scoped_ptr<WebKit::WebGraphicsContext3D> context3d);
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_