ui/ozone/platform/dri/screen_manager.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 UI_OZONE_PLATFORM_DRI_SCREEN_MANAGER_H_
   6 #define UI_OZONE_PLATFORM_DRI_SCREEN_MANAGER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_vector.h"
  10 #include "base/observer_list.h"
  11 #include "ui/ozone/platform/dri/display_change_observer.h"
  12 #include "ui/ozone/platform/dri/hardware_display_controller.h"
  13
  14 typedef struct _drmModeModeInfo drmModeModeInfo;
  15
  16 namespace gfx {
  17 class Point;
  18 class Rect;
  19 class Size;
  20 }  // namespace gfx
  21
  22 namespace ui {
  23
  24 class DriWrapper;
  25 class ScanoutBufferGenerator;
  26
  27 // Responsible for keeping track of active displays and configuring them.
  28 class ScreenManager {
  29  public:
  30   ScreenManager(DriWrapper* dri, ScanoutBufferGenerator* surface_generator);
  31   virtual ~ScreenManager();
  32
  33   // Register a display controller. This must be called before trying to
  34   // configure it.
  35   void AddDisplayController(DriWrapper* dri, uint32_t crtc, uint32_t connector);
  36
  37   // Remove a display controller from the list of active controllers. The
  38   // controller is removed since it was disconnected.
  39   void RemoveDisplayController(uint32_t crtc);
  40
  41   // Configure a display controller. The display controller is identified by
  42   // (|crtc|, |connector|) and the controller is modeset using |mode|.
  43   bool ConfigureDisplayController(uint32_t crtc,
  44                                   uint32_t connector,
  45                                   const gfx::Point& origin,
  46                                   const drmModeModeInfo& mode);
  47
  48   // Disable the display controller identified by |crtc|. Note, the controller
  49   // may still be connected, so this does not remove the controller.
  50   bool DisableDisplayController(uint32_t crtc);
  51
  52   // Returns a reference to the display controller configured to display within
  53   // |bounds|. If the caller caches the controller it must also register as an
  54   // observer to be notified when the controller goes out of scope.
  55   HardwareDisplayController* GetDisplayController(const gfx::Rect& bounds);
  56
  57   void AddObserver(DisplayChangeObserver* observer);
  58   void RemoveObserver(DisplayChangeObserver* observer);
  59
  60   // On non CrOS builds there is no display configurator to look-up available
  61   // displays and initialize the HDCs. In such cases this is called internally
  62   // to initialize a display.
  63   virtual void ForceInitializationOfPrimaryDisplay();
  64
  65  private:
  66   typedef ScopedVector<HardwareDisplayController> HardwareDisplayControllers;
  67
  68   // Returns an iterator into |controllers_| for the controller identified by
  69   // (|crtc|, |connector|).
  70   HardwareDisplayControllers::iterator FindDisplayController(uint32_t crtc);
  71
  72   // Returns an iterator into |controllers_| for the controller located at
  73   // |origin|.
  74   HardwareDisplayControllers::iterator FindActiveDisplayControllerByLocation(
  75       const gfx::Rect& bounds);
  76
  77   // Perform modesetting in |controller| using |origin| and |mode|.
  78   bool ModesetDisplayController(HardwareDisplayController* controller,
  79                                 const gfx::Point& origin,
  80                                 const drmModeModeInfo& mode);
  81
  82   // Tries to set the controller identified by (|crtc|, |connector|) to mirror
  83   // those in |mirror|. |original| is an iterator to the HDC where the
  84   // controller is currently present.
  85   bool HandleMirrorMode(HardwareDisplayControllers::iterator original,
  86                         HardwareDisplayControllers::iterator mirror,
  87                         uint32_t crtc,
  88                         uint32_t connector);
  89
  90   DriWrapper* dri_;  // Not owned.
  91   ScanoutBufferGenerator* buffer_generator_;  // Not owned.
  92   // List of display controllers (active and disabled).
  93   HardwareDisplayControllers controllers_;
  94
  95   ObserverList<DisplayChangeObserver> observers_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(ScreenManager);
  98 };
  99
 100 }  // namespace ui
 101
 102 #endif  // UI_OZONE_PLATFORM_DRI_SCREEN_MANAGER_H_