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/*
Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
Copyright (C) 2012 Company 100, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef UpdateAtlas_h
#define UpdateAtlas_h
#include "AreaAllocator.h"
#include <WebCore/CoordinatedSurface.h>
#include <WebCore/IntSize.h>
#include <wtf/RefPtr.h>
#if USE(COORDINATED_GRAPHICS)
namespace WebCore {
class GraphicsContext;
class IntPoint;
}
namespace WebKit {
class UpdateAtlas {
WTF_MAKE_NONCOPYABLE(UpdateAtlas);
public:
class Client {
public:
virtual void createUpdateAtlas(uint32_t /* id */, RefPtr<WebCore::CoordinatedSurface>&&) = 0;
virtual void removeUpdateAtlas(uint32_t /* id */) = 0;
};
UpdateAtlas(Client&, int dimension, WebCore::CoordinatedSurface::Flags);
~UpdateAtlas();
inline WebCore::IntSize size() const { return m_surface->size(); }
// Returns false if there is no available buffer.
bool paintOnAvailableBuffer(const WebCore::IntSize&, uint32_t& atlasID, WebCore::IntPoint& offset, WebCore::CoordinatedSurface::Client&);
void didSwapBuffers();
bool supportsAlpha() const { return m_surface->supportsAlpha(); }
void addTimeInactive(double seconds)
{
ASSERT(!isInUse());
m_inactivityInSeconds += seconds;
}
bool isInactive() const
{
const double inactiveSecondsTolerance = 3;
return m_inactivityInSeconds > inactiveSecondsTolerance;
}
bool isInUse() const { return !!m_areaAllocator; }
private:
void buildLayoutIfNeeded();
private:
Client& m_client;
std::unique_ptr<GeneralAreaAllocator> m_areaAllocator;
RefPtr<WebCore::CoordinatedSurface> m_surface;
double m_inactivityInSeconds { 0 };
uint32_t m_ID { 0 };
};
} // namespace WebKit
#endif // USE(COORDINATED_GRAPHICS)
#endif // UpdateAtlas_h
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