content/browser/compositor/image_transport_factory.h

   1 // Copyright 2014 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_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "cc/surfaces/surface_id_allocator.h"
  13 #include "content/common/content_export.h"
  14 #include "ui/gfx/native_widget_types.h"
  15
  16 namespace cc {
  17 class SurfaceManager;
  18 }
  19
  20 namespace gfx {
  21 class Size;
  22 }
  23
  24 namespace ui {
  25 class ContextFactory;
  26 class Texture;
  27 }
  28
  29 namespace blink {
  30 class WebGraphicsContext3D;
  31 }
  32
  33 namespace content {
  34 class GLHelper;
  35
  36 // This class provides a way to get notified when surface handles get lost.
  37 class CONTENT_EXPORT ImageTransportFactoryObserver {
  38  public:
  39   virtual ~ImageTransportFactoryObserver() {}
  40
  41   // Notifies that the surface handles generated by ImageTransportFactory were
  42   // lost.
  43   // When this is called, the old resources (e.g. shared context, GL helper)
  44   // still exist, but are about to be destroyed. Getting a reference to those
  45   // resources from the ImageTransportFactory (e.g. through GetGLHelper) will
  46   // return newly recreated, valid resources.
  47   virtual void OnLostResources() = 0;
  48 };
  49
  50 // This class provides the interface for creating the support for the
  51 // cross-process image transport, both for creating the shared surface handle
  52 // (destination surface for the GPU process) and the transport client (logic for
  53 // using that surface as a texture). The factory is a process-wide singleton.
  54 class CONTENT_EXPORT ImageTransportFactory {
  55  public:
  56   virtual ~ImageTransportFactory() {}
  57
  58   // Initializes the global transport factory.
  59   static void Initialize();
  60
  61   // Initializes the global transport factory for unit tests using the provided
  62   // context factory.
  63   static void InitializeForUnitTests(scoped_ptr<ImageTransportFactory> factory);
  64
  65   // Terminates the global transport factory.
  66   static void Terminate();
  67
  68   // Gets the factory instance.
  69   static ImageTransportFactory* GetInstance();
  70
  71   // Gets the image transport factory as a context factory for the compositor.
  72   virtual ui::ContextFactory* GetContextFactory() = 0;
  73
  74   virtual gfx::GLSurfaceHandle GetSharedSurfaceHandle() = 0;
  75   virtual scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() = 0;
  76   virtual cc::SurfaceManager* GetSurfaceManager() = 0;
  77
  78   // Gets a GLHelper instance, associated with the shared context. This
  79   // GLHelper will get destroyed whenever the shared context is lost
  80   // (ImageTransportFactoryObserver::OnLostResources is called).
  81   virtual GLHelper* GetGLHelper() = 0;
  82
  83   virtual void AddObserver(ImageTransportFactoryObserver* observer) = 0;
  84   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
  85
  86 #if defined(OS_MACOSX)
  87   virtual void OnSurfaceDisplayed(int surface_id) = 0;
  88 #endif
  89 };
  90
  91 }  // namespace content
  92
  93 #endif  // CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_