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 <map>
   9
  10 #include "base/macros.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "ui/gfx/native_widget_types.h"
  13 #include "ui/ozone/platform/dri/hardware_display_controller.h"
  14
  15 typedef struct _drmModeModeInfo drmModeModeInfo;
  16
  17 namespace gfx {
  18 class Point;
  19 class Rect;
  20 class Size;
  21 }  // namespace gfx
  22
  23 namespace ui {
  24
  25 class DriWrapper;
  26 class ScanoutSurfaceGenerator;
  27
  28 // Responsible for keeping track of active displays and configuring them.
  29 class OZONE_EXPORT ScreenManager {
  30  public:
  31   ScreenManager(DriWrapper* dri, ScanoutSurfaceGenerator* surface_generator);
  32   virtual ~ScreenManager();
  33
  34   // Remove a display controller from the list of active controllers. The
  35   // controller is removed since it was disconnected.
  36   void RemoveDisplayController(uint32_t crtc, uint32_t connector);
  37
  38   // Configure (and add if not present) a display controller. The display
  39   // controller is identified by (|crtc|, |connector|) and the controller is
  40   // modeset using |mode|.
  41   bool ConfigureDisplayController(uint32_t crtc,
  42                                   uint32_t connector,
  43                                   const drmModeModeInfo& mode);
  44
  45   // Disable the display controller identified by (|crtc|, |connector|). Note,
  46   // the controller may still be connected, so this does not remove the
  47   // controller.
  48   bool DisableDisplayController(uint32_t crtc, uint32_t connector);
  49
  50   // Returns a reference to the display controller associated with |widget|.
  51   // This returns a weak reference since the display controller may be destroyed
  52   // at any point in time, but the changes are propagated to the compositor much
  53   // later (Compositor owns SurfaceOzone*, which is responsible for updating the
  54   // display surface).
  55   base::WeakPtr<HardwareDisplayController> GetDisplayController(
  56       gfx::AcceleratedWidget widget);
  57
  58  private:
  59   typedef std::map<gfx::AcceleratedWidget, HardwareDisplayController*>
  60       HardwareDisplayControllerMap;
  61
  62   // Returns an iterator into |controllers_| for the controller identified by
  63   // (|crtc|, |connector|).
  64   HardwareDisplayControllerMap::iterator FindDisplayController(
  65       uint32_t crtc, uint32_t connector);
  66
  67   // On non CrOS builds there is no display configurator to look-up available
  68   // displays and initialize the HDCs. In such cases this is called internally
  69   // to initialize a display.
  70   virtual void ForceInitializationOfPrimaryDisplay();
  71
  72   DriWrapper* dri_;  // Not owned.
  73   ScanoutSurfaceGenerator* surface_generator_;  // Not owned.
  74   // Mapping between an accelerated widget and an active display.
  75   HardwareDisplayControllerMap controllers_;
  76   gfx::AcceleratedWidget last_added_widget_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(ScreenManager);
  79 };
  80
  81 }  // namespace ui
  82
  83 #endif  // UI_OZONE_PLATFORM_DRI_SCREEN_MANAGER_H_