ui/ozone/public/overlay_manager_ozone.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 UI_OZONE_PUBLIC_OVERLAY_MANAGER_OZONE_H_
   6 #define UI_OZONE_PUBLIC_OVERLAY_MANAGER_OZONE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/gfx/native_widget_types.h"
  10
  11 namespace ui {
  12
  13 class OverlayCandidatesOzone;
  14
  15 // Responsible for providing the oracles used to decide when overlays can be
  16 // used.
  17 class OverlayManagerOzone {
  18  public:
  19   virtual ~OverlayManagerOzone() {}
  20
  21   // Get the hal struct to check for overlay support.
  22   virtual scoped_ptr<OverlayCandidatesOzone> CreateOverlayCandidates(
  23       gfx::AcceleratedWidget w) = 0;
  24
  25   // Returns true if overlays can be shown at z-index 0, replacing the main
  26   // surface. Combined with surfaceless extensions, it allows for an
  27   // overlay-only mode.
  28   virtual bool CanShowPrimaryPlaneAsOverlay() = 0;
  29 };
  30
  31 }  // namespace ui
  32
  33 #endif  // UI_OZONE_PUBLIC_OVERLAY_MANAGER_OZONE_H_