1/* 2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) 3 Copyright (C) 2012 Company 100, Inc. 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public 7 License as published by the Free Software Foundation; either 8 version 2 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Library General Public License for more details. 14 15 You should have received a copy of the GNU Library General Public License 16 along with this library; see the file COPYING.LIB. If not, write to 17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 Boston, MA 02110-1301, USA. 19 */ 20 21#ifndef UpdateAtlas_h 22#define UpdateAtlas_h 23 24#include "AreaAllocator.h" 25#include "CoordinatedSurface.h" 26#include "IntSize.h" 27#include <wtf/PassRefPtr.h> 28#include <wtf/RefPtr.h> 29 30#if USE(COORDINATED_GRAPHICS) 31 32namespace WebCore { 33class GraphicsContext; 34class IntPoint; 35 36class UpdateAtlas { 37 WTF_MAKE_NONCOPYABLE(UpdateAtlas); 38public: 39 class Client { 40 public: 41 virtual void createUpdateAtlas(uint32_t /* id */, PassRefPtr<CoordinatedSurface>) = 0; 42 virtual void removeUpdateAtlas(uint32_t /* id */) = 0; 43 }; 44 45 UpdateAtlas(Client*, int dimension, CoordinatedSurface::Flags); 46 ~UpdateAtlas(); 47 48 inline IntSize size() const { return m_surface->size(); } 49 50 // Returns false if there is no available buffer. 51 bool paintOnAvailableBuffer(const IntSize&, uint32_t& atlasID, IntPoint& offset, CoordinatedSurface::Client*); 52 void didSwapBuffers(); 53 bool supportsAlpha() const { return m_surface->supportsAlpha(); } 54 55 void addTimeInactive(double seconds) 56 { 57 ASSERT(!isInUse()); 58 m_inactivityInSeconds += seconds; 59 } 60 bool isInactive() const 61 { 62 const double inactiveSecondsTolerance = 3; 63 return m_inactivityInSeconds > inactiveSecondsTolerance; 64 } 65 bool isInUse() const { return !!m_areaAllocator; } 66 67private: 68 void buildLayoutIfNeeded(); 69 70private: 71 Client* m_client; 72 std::unique_ptr<GeneralAreaAllocator> m_areaAllocator; 73 RefPtr<CoordinatedSurface> m_surface; 74 double m_inactivityInSeconds; 75 uint32_t m_ID; 76}; 77 78} // namespace WebCore 79#endif // USE(COORDINATED_GRAPHICS) 80#endif // UpdateAtlas_h 81