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