components/view_manager/surfaces/surfaces_state.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 COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_
   6 #define COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "cc/surfaces/surface_manager.h"
  11 #include "components/view_manager/surfaces/surfaces_scheduler.h"
  12
  13 namespace cc {
  14 class SurfaceManager;
  15 }  // namespace cc
  16
  17 namespace surfaces {
  18
  19 // The SurfacesState object is an object global to the View Manager app that
  20 // holds the SurfaceManager, SurfacesScheduler and allocates new Surfaces
  21 // namespaces. This object lives on the main thread of the View Manager.
  22 // TODO(rjkroege, fsamuel): This object will need to change to support multiple
  23 // displays.
  24 class SurfacesState : public base::RefCounted<SurfacesState> {
  25  public:
  26   SurfacesState();
  27
  28   uint32_t next_id_namespace() { return next_id_namespace_++; }
  29
  30   cc::SurfaceManager* manager() { return &manager_; }
  31
  32   SurfacesScheduler* scheduler() { return &scheduler_; }
  33
  34  private:
  35   friend class base::RefCounted<SurfacesState>;
  36   ~SurfacesState();
  37
  38   // A Surface ID is an unsigned 64-bit int where the high 32-bits are generated
  39   // by the Surfaces service, and the low 32-bits are generated by the process
  40   // that requested the Surface.
  41   uint32_t next_id_namespace_;
  42   cc::SurfaceManager manager_;
  43   SurfacesScheduler scheduler_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(SurfacesState);
  46 };
  47
  48 }  // namespace surfaces
  49
  50 #endif  //  COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_