Add content::SurfaceCapturer

content/browser/aura/image_transport_factory.h

 // Copyright (c) 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 CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
+#include "content/common/gpu/surface_capturer.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Size;
 }
 
 namespace ui {
+class Compositor;
 class ContextFactory;
 class Texture;
 }
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace content {
 class GLHelper;
 
 // This class provides a way to get notified when surface handles get lost.
 class ImageTransportFactoryObserver {
  public:
   virtual ~ImageTransportFactoryObserver() {}
 
   // Notifies that the surface handles generated by ImageTransportFactory were
   // lost.
   // When this is called, the old resources (e.g. shared context, GL helper)
   // still exist, but are about to be destroyed. Getting a reference to those
   // resources from the ImageTransportFactory (e.g. through GetGLHelper) will
   // return newly recreated, valid resources.
   virtual void OnLostResources() = 0;
 };
 
+// This class provides the interface for creating a ui::ContextFactory that
+// supports creation of a SurfaceCapturer that captures the output of a given
+// ui::Compositor.  The factory instance is retrieved from the
+// ImageTransportFactory.
+class SurfaceCapturingContextFactory {
+ public:
+  virtual ~SurfaceCapturingContextFactory() {}
+
+  // Creates a SurfaceCapturer that captures frames from the given compositor's
+  // current output surface.
+  virtual scoped_ptr<SurfaceCapturer> CreateOutputSurfaceCapturer(
+      ui::Compositor* compositor,
+      SurfaceCapturer::Client* client) = 0;
+};
+
 // This class provides the interface for creating the support for the
 // cross-process image transport, both for creating the shared surface handle
 // (destination surface for the GPU process) and the transport client (logic for
 // using that surface as a texture). The factory is a process-wide singleton.
 class ImageTransportFactory {
  public:
   virtual ~ImageTransportFactory() {}
 
   // Initialize the global transport factory.
   static void Initialize();
 
   // Terminates the global transport factory.
   static void Terminate();
 
   // Gets the factory instance.
   static ImageTransportFactory* GetInstance();
 
   // Gets the image transport factory as a context factory for the compositor.
   virtual ui::ContextFactory* AsContextFactory() = 0;
 
+  // Gets the image transport factory as a surface capturer factory for the
+  // compositor.
+  virtual SurfaceCapturingContextFactory*
+      AsSurfaceCapturingContextFactory() = 0;
+
   // Creates a shared surface handle.
   // Note: the handle may get lost at any time, a state that an
   // ImageTransportFactoryObserver gets notified of.
   virtual gfx::GLSurfaceHandle CreateSharedSurfaceHandle() = 0;
 
   // Destroys a shared surface handle.
   virtual void DestroySharedSurfaceHandle(gfx::GLSurfaceHandle surface) = 0;
 
   // Creates a transport texture for a given scale factor.
   virtual scoped_refptr<ui::Texture> CreateTransportClient(
@@ skipping 17 matching lines @@
   // Blocks waiting for the sync point on the service side.
   virtual void WaitSyncPoint(uint32 sync_point) = 0;
 
   virtual void AddObserver(ImageTransportFactoryObserver* observer) = 0;
   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_