Add support for a virtual display on ChromeOS

ui/display/chromeos/display_configurator.h

 // Copyright 2014 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 UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 #define UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #include "ui/display/display_export.h"
 #include "ui/display/types/display_constants.h"
+#include "ui/display/types/display_mode.h"
 #include "ui/display/types/native_display_observer.h"
 #include "ui/gfx/geometry/size.h"
-
 namespace gfx {
 class Point;
 class Size;
 }
 
 namespace ui {
 struct DisplayConfigureRequest;
-class DisplayMode;
 class DisplaySnapshot;
 class NativeDisplayDelegate;
 class UpdateDisplayConfigurationTask;
 
 // This class interacts directly with the system display configurator.
 class DISPLAY_EXPORT DisplayConfigurator : public NativeDisplayObserver {
  public:
   typedef uint64_t ContentProtectionClientId;
   static const ContentProtectionClientId kInvalidClientId = 0;
 
@@ skipping 235 matching lines @@
 
   // Checks the available color profiles for |display_id| and fills the result
   // into |profiles|.
   std::vector<ui::ColorCalibrationProfile> GetAvailableColorCalibrationProfiles(
       int64_t display_id);
 
   // Updates the color calibration to |new_profile|.
   bool SetColorCalibrationProfile(int64_t display_id,
                                   ui::ColorCalibrationProfile new_profile);
 
+  // Enable/disable virtual output

[achuithb, 2015/02/11 23:41:44]

period

+  void EnableVirtualDisplay(scoped_ptr<DisplayMode> display_mode);
+  void DisableVirtualDisplay();
+  bool virtual_display_enabled() { return virtual_display_mode_.get(); }

[achuithb, 2015/02/11 23:41:44]

this should be a const fn and it should be camelcase.
bool IsVirtualDisplayEnabled() const { ... }

+
+  // Find the virtual display id, returns -1 if none

[achuithb, 2015/02/11 23:41:44]

period

+  int64 GetVirtualDisplayId();
+
  private:
   class DisplayLayoutManagerImpl;
 
   // Mapping a display_id to a protection request bitmask.
   typedef std::map<int64_t, uint32_t> ContentProtections;
   // Mapping a client to its protection request.
   typedef std::map<ContentProtectionClientId, ContentProtections>
       ProtectionRequests;
 
   // Performs platform specific delegate initialization.
@@ skipping 112 matching lines @@
 
   // Display protection requests of each client.
   ProtectionRequests client_protection_requests_;
 
   // Display controlled by an external entity.
   bool display_externally_controlled_;
 
   // Whether the displays are currently suspended.
   bool displays_suspended_;
 
+  // Virtual output control

[achuithb, 2015/02/11 23:41:44]

period

+  scoped_ptr<DisplayMode> virtual_display_mode_;
+
   scoped_ptr<DisplayLayoutManager> layout_manager_;
 
   scoped_ptr<UpdateDisplayConfigurationTask> configuration_task_;
 
   // This must be the last variable.
   base::WeakPtrFactory<DisplayConfigurator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayConfigurator);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_