Ozone integration.

ui/ozone/platform/drm/gpu/screen_manager.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_OZONE_PLATFORM_DRM_GPU_SCREEN_MANAGER_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_SCREEN_MANAGER_H_
+
+#include "base/containers/scoped_ptr_hash_map.h"
+#include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+#include "base/observer_list.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/ozone/ozone_export.h"
+#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
+
+typedef struct _drmModeModeInfo drmModeModeInfo;
+
+namespace gfx {
+class Point;
+class Rect;
+class Size;
+}  // namespace gfx
+
+namespace ui {
+
+class DrmDevice;
+class DrmWindow;
+class ScanoutBufferGenerator;
+
+// Responsible for keeping track of active displays and configuring them.
+class OZONE_EXPORT ScreenManager {
+ public:
+  ScreenManager(ScanoutBufferGenerator* surface_generator);
+  virtual ~ScreenManager();
+
+  // Register a display controller. This must be called before trying to
+  // configure it.
+  void AddDisplayController(const scoped_refptr<DrmDevice>& drm,
+                            uint32_t crtc,
+                            uint32_t connector);
+
+  // Remove a display controller from the list of active controllers. The
+  // controller is removed since it was disconnected.
+  void RemoveDisplayController(const scoped_refptr<DrmDevice>& drm,
+                               uint32_t crtc);
+
+  // Configure a display controller. The display controller is identified by
+  // (|crtc|, |connector|) and the controller is modeset using |mode|.
+  bool ConfigureDisplayController(const scoped_refptr<DrmDevice>& drm,
+                                  uint32_t crtc,
+                                  uint32_t connector,
+                                  const gfx::Point& origin,
+                                  const drmModeModeInfo& mode);
+
+  // Disable the display controller identified by |crtc|. Note, the controller
+  // may still be connected, so this does not remove the controller.
+  bool DisableDisplayController(const scoped_refptr<DrmDevice>& drm,
+                                uint32_t crtc);
+
+  // Returns a reference to the display controller configured to display within
+  // |bounds|. If the caller caches the controller it must also register as an
+  // observer to be notified when the controller goes out of scope.
+  HardwareDisplayController* GetDisplayController(const gfx::Rect& bounds);
+
+  // Adds a window for |widget|. Note: |widget| should not be associated with a
+  // window when calling this function.
+  void AddWindow(gfx::AcceleratedWidget widget, scoped_ptr<DrmWindow> window);
+
+  // Removes the window for |widget|. Note: |widget| must have a window
+  // associated with it when calling this function.
+  scoped_ptr<DrmWindow> RemoveWindow(gfx::AcceleratedWidget widget);
+
+  // Returns the window associated with |widget|. Note: This function should be
+  // called only if a valid window has been associated with |widget|.
+  DrmWindow* GetWindow(gfx::AcceleratedWidget widget);
+
+  // Updates the mapping between display controllers and windows such that a
+  // controller will be associated with at most one window.
+  void UpdateControllerToWindowMapping();
+
+ private:
+  typedef ScopedVector<HardwareDisplayController> HardwareDisplayControllers;
+
+  typedef base::ScopedPtrHashMap<gfx::AcceleratedWidget, scoped_ptr<DrmWindow>>
+      WidgetToWindowMap;
+
+  // Returns an iterator into |controllers_| for the controller identified by
+  // (|crtc|, |connector|).
+  HardwareDisplayControllers::iterator FindDisplayController(
+      const scoped_refptr<DrmDevice>& drm,
+      uint32_t crtc);
+
+  bool ActualConfigureDisplayController(const scoped_refptr<DrmDevice>& drm,
+                                        uint32_t crtc,
+                                        uint32_t connector,
+                                        const gfx::Point& origin,
+                                        const drmModeModeInfo& mode);
+
+  // Returns an iterator into |controllers_| for the controller located at
+  // |origin|.
+  HardwareDisplayControllers::iterator FindActiveDisplayControllerByLocation(
+      const gfx::Rect& bounds);
+
+  // Tries to set the controller identified by (|crtc|, |connector|) to mirror
+  // those in |mirror|. |original| is an iterator to the HDC where the
+  // controller is currently present.
+  bool HandleMirrorMode(HardwareDisplayControllers::iterator original,
+                        HardwareDisplayControllers::iterator mirror,
+                        const scoped_refptr<DrmDevice>& drm,
+                        uint32_t crtc,
+                        uint32_t connector);
+
+  // Modeset the |controller| using |origin| and |mode|. If there is a window at
+  // the controller location, then we'll re-use the current buffer.
+  bool EnableController(HardwareDisplayController* controller,
+                        const gfx::Point& origin,
+                        const drmModeModeInfo& mode);
+
+  DrmWindow* FindWindowAt(const gfx::Rect& bounds) const;
+
+  ScanoutBufferGenerator* buffer_generator_;  // Not owned.
+  // List of display controllers (active and disabled).
+  HardwareDisplayControllers controllers_;
+
+  WidgetToWindowMap window_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenManager);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_SCREEN_MANAGER_H_