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// Copyright 2013 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_OZONE_PLATFORM_H_
#define UI_OZONE_OZONE_PLATFORM_H_
#include "base/memory/scoped_ptr.h"
#include "ui/ozone/ozone_export.h"
namespace gfx {
class SurfaceFactoryOzone;
}
namespace ui {
class CursorFactoryOzone;
class EventFactoryOzone;
class NativeDisplayDelegate;
class TouchscreenDeviceManager;
// Base class for Ozone platform implementations.
//
// Ozone platforms must override this class and implement the virtual
// GetFooFactoryOzone() methods to provide implementations of the
// various ozone interfaces.
//
// The OzonePlatform subclass can own any state needed by the
// implementation that is shared between the various ozone interfaces,
// such as a connection to the windowing system.
//
// A platform is free to use different implementations of each
// interface depending on the context. You can, for example, create
// different objects depending on the underlying hardware, command
// line flags, or whatever is appropriate for the platform.
class OZONE_EXPORT OzonePlatform {
public:
OzonePlatform();
virtual ~OzonePlatform();
// Initializes the subsystems/resources necessary for the UI process (e.g.
// events, surface, etc.)
static void InitializeForUI();
// Initializes the subsystems/resources necessary for the GPU process.
static void InitializeForGPU();
static OzonePlatform* GetInstance();
// Factory getters to override in subclasses. The returned objects will be
// injected into the appropriate layer at startup. Subclasses should not
// inject these objects themselves. Ownership is retained by OzonePlatform.
virtual gfx::SurfaceFactoryOzone* GetSurfaceFactoryOzone() = 0;
virtual ui::EventFactoryOzone* GetEventFactoryOzone() = 0;
virtual ui::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
#if defined(OS_CHROMEOS)
virtual scoped_ptr<ui::NativeDisplayDelegate>
CreateNativeDisplayDelegate() = 0;
virtual scoped_ptr<ui::TouchscreenDeviceManager>
CreateTouchscreenDeviceManager() = 0;
#endif
private:
virtual void InitializeUI() = 0;
virtual void InitializeGPU() = 0;
static void CreateInstance();
static OzonePlatform* instance_;
DISALLOW_COPY_AND_ASSIGN(OzonePlatform);
};
} // namespace ui
#endif // UI_OZONE_OZONE_PLATFORM_H_
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