content/common/mac/io_surface_manager.h

   1 // Copyright 2015 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_COMMON_MAC_IO_SURFACE_MANAGER_H_
   6 #define CONTENT_COMMON_MAC_IO_SURFACE_MANAGER_H_
   7
   8 #include <IOSurface/IOSurface.h>
   9
  10 #include "content/common/content_export.h"
  11 #include "ui/gfx/generic_shared_memory_id.h"
  12
  13 namespace content {
  14
  15 using IOSurfaceId = gfx::GenericSharedMemoryId;
  16
  17 // This interface provides a mechanism for different processes to securely
  18 // share IOSurfaces. A process can register an IOSurface for use in another
  19 // process and the client ID provided with registration determines the process
  20 // that can acquire a reference to the IOSurface.
  21 class CONTENT_EXPORT IOSurfaceManager {
  22  public:
  23   static IOSurfaceManager* GetInstance();
  24   static void SetInstance(IOSurfaceManager* instance);
  25
  26   // Register an IO surface for use in another process.
  27   virtual bool RegisterIOSurface(IOSurfaceId io_surface_id,
  28                                  int client_id,
  29                                  IOSurfaceRef io_surface) = 0;
  30
  31   // Unregister an IO surface previously registered for use in another
  32   // process.
  33   virtual void UnregisterIOSurface(IOSurfaceId io_surface_id,
  34                                    int client_id) = 0;
  35
  36   // Acquire IO surface reference for a registered IO surface.
  37   virtual IOSurfaceRef AcquireIOSurface(IOSurfaceId io_surface_id) = 0;
  38
  39  protected:
  40   virtual ~IOSurfaceManager() {}
  41 };
  42
  43 }  // namespace content
  44
  45 #endif  // CONTENT_COMMON_MAC_IO_SURFACE_MANAGER_H_