ui/ozone/public/ozone_platform.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_PUBLIC_OZONE_PLATFORM_H_
   6 #define UI_OZONE_PUBLIC_OZONE_PLATFORM_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/ozone/ozone_export.h"
  10
  11 namespace gfx {
  12 class Rect;
  13 }
  14
  15 namespace ui {
  16
  17 class CursorFactoryOzone;
  18 class NativeDisplayDelegate;
  19 class SurfaceFactoryOzone;
  20 class TouchscreenDeviceManager;
  21 class GpuPlatformSupport;
  22 class GpuPlatformSupportHost;
  23 class PlatformWindow;
  24 class PlatformWindowDelegate;
  25
  26 // Base class for Ozone platform implementations.
  27 //
  28 // Ozone platforms must override this class and implement the virtual
  29 // GetFooFactoryOzone() methods to provide implementations of the
  30 // various ozone interfaces.
  31 //
  32 // The OzonePlatform subclass can own any state needed by the
  33 // implementation that is shared between the various ozone interfaces,
  34 // such as a connection to the windowing system.
  35 //
  36 // A platform is free to use different implementations of each
  37 // interface depending on the context. You can, for example, create
  38 // different objects depending on the underlying hardware, command
  39 // line flags, or whatever is appropriate for the platform.
  40 class OZONE_EXPORT OzonePlatform {
  41  public:
  42   OzonePlatform();
  43   virtual ~OzonePlatform();
  44
  45   // Initializes the subsystems/resources necessary for the UI process (e.g.
  46   // events, surface, etc.)
  47   static void InitializeForUI();
  48
  49   // Initializes the subsystems/resources necessary for the GPU process.
  50   static void InitializeForGPU();
  51
  52   static OzonePlatform* GetInstance();
  53
  54   // Factory getters to override in subclasses. The returned objects will be
  55   // injected into the appropriate layer at startup. Subclasses should not
  56   // inject these objects themselves. Ownership is retained by OzonePlatform.
  57   virtual ui::SurfaceFactoryOzone* GetSurfaceFactoryOzone() = 0;
  58   virtual ui::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
  59   virtual ui::GpuPlatformSupport* GetGpuPlatformSupport() = 0;
  60   virtual ui::GpuPlatformSupportHost* GetGpuPlatformSupportHost() = 0;
  61   virtual scoped_ptr<PlatformWindow> CreatePlatformWindow(
  62       PlatformWindowDelegate* delegate,
  63       const gfx::Rect& bounds) = 0;
  64 #if defined(OS_CHROMEOS)
  65   virtual scoped_ptr<ui::NativeDisplayDelegate>
  66       CreateNativeDisplayDelegate() = 0;
  67   virtual scoped_ptr<ui::TouchscreenDeviceManager>
  68       CreateTouchscreenDeviceManager() = 0;
  69 #endif
  70
  71  private:
  72   virtual void InitializeUI() = 0;
  73   virtual void InitializeGPU() = 0;
  74
  75   static void CreateInstance();
  76
  77   static OzonePlatform* instance_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(OzonePlatform);
  80 };
  81
  82 }  // namespace ui
  83
  84 #endif  // UI_OZONE_PUBLIC_OZONE_PLATFORM_H_