1/* 2 * Copyright (C) 2009, 2010, 2011 Research In Motion Limited. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#ifndef BackingStore_h 20#define BackingStore_h 21 22#include "BlackBerryGlobal.h" 23#include <BlackBerryPlatformMisc.h> 24 25namespace WebCore { 26class ChromeClientBlackBerry; 27class FloatPoint; 28class FrameLoaderClientBlackBerry; 29class GLES2Context; 30class IntRect; 31} 32 33namespace BlackBerry { 34namespace Platform { 35class IntRect; 36class FloatPoint; 37 38namespace Graphics { 39class Buffer; 40} 41} 42} 43 44namespace BlackBerry { 45namespace WebKit { 46 47class WebPage; 48class WebPagePrivate; 49class WebPageCompositorPrivate; 50class BackingStorePrivate; 51class BackingStoreClient; 52 53class BLACKBERRY_EXPORT BackingStore { 54public: 55 enum ResumeUpdateOperation { None, Blit, RenderAndBlit }; 56 BackingStore(WebPage*, BackingStoreClient*); 57 virtual ~BackingStore(); 58 59 void createSurface(); 60 61 void suspendBackingStoreUpdates(); 62 void resumeBackingStoreUpdates(); 63 64 void suspendGeometryUpdates(); 65 void resumeGeometryUpdates(); 66 67 void suspendScreenUpdates(); 68 void resumeScreenUpdates(BackingStore::ResumeUpdateOperation); 69 70 bool isScrollingOrZooming() const; 71 void setScrollingOrZooming(bool); 72 73 void blitVisibleContents(); 74 void repaint(int x, int y, int width, int height, bool contentChanged, bool immediate); 75 76 bool hasBlitJobs() const; 77 void blitOnIdle(); 78 79 void acquireBackingStoreMemory(); 80 void releaseOwnedBackingStoreMemory(); 81 82 bool drawContents(BlackBerry::Platform::Graphics::Buffer*, const BlackBerry::Platform::IntRect& dstRect, double scale, const BlackBerry::Platform::FloatPoint& documentScrollPosition); 83 84private: 85 friend class BlackBerry::WebKit::BackingStoreClient; 86 friend class BlackBerry::WebKit::BackingStorePrivate; 87 friend class BlackBerry::WebKit::WebPage; 88 friend class BlackBerry::WebKit::WebPagePrivate; // FIXME: For now, we expose our internals to WebPagePrivate. See PR #120301. 89 friend class BlackBerry::WebKit::WebPageCompositorPrivate; 90 friend class WebCore::ChromeClientBlackBerry; 91 friend class WebCore::FrameLoaderClientBlackBerry; 92 friend class WebCore::GLES2Context; 93 BackingStorePrivate *d; 94 DISABLE_COPY(BackingStore) 95}; 96} 97} 98 99#endif // BackingStore_h 100