1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef CompositorAnimations_h 32 #define CompositorAnimations_h 33 34 #include "core/animation/AnimationEffect.h" 35 #include "core/animation/Timing.h" 36 #include "core/platform/animation/TimingFunction.h" 37 #include "wtf/Vector.h" 38 39 namespace WebCore { 40 41 class Element; 42 43 // Given an input timing function between keyframe at 0 and keyframe at 1.0, we 44 // need a timing function such that the behavior with the keyframes swapped is 45 // equivalent to reversing time with the input timing function and keyframes. 46 // This means flipping the timing function about x=0.5 and about y=0.5. 47 // FIXME: Remove once the Compositor natively understands reversing time. 48 class CompositorAnimationsTimingFunctionReverser { 49 public: 50 static PassRefPtr<TimingFunction> reverse(const LinearTimingFunction* timefunc); 51 static PassRefPtr<TimingFunction> reverse(const CubicBezierTimingFunction* timefunc); 52 static PassRefPtr<TimingFunction> reverse(const ChainedTimingFunction* timefunc); 53 static PassRefPtr<TimingFunction> reverse(const TimingFunction* timefunc); 54 }; 55 56 class CompositorAnimations { 57 public: 58 static CompositorAnimations* instance() { return instance(0); } 59 static void setInstanceForTesting(CompositorAnimations* newInstance) { instance(newInstance); } 60 61 virtual bool isCandidateForAnimationOnCompositor(const Timing&, const AnimationEffect&); 62 virtual bool canStartAnimationOnCompositor(const Element&); 63 // FIXME: This should return void. We should know ahead of time whether these animations can be started. 64 virtual bool startAnimationOnCompositor(const Element&, const Timing&, const AnimationEffect&, Vector<int>& startedAnimationIds); 65 virtual void cancelAnimationOnCompositor(const Element&, int id); 66 virtual void pauseAnimationForTestingOnCompositor(const Element&, int id, double pauseTime); 67 68 protected: 69 CompositorAnimations() { } 70 71 private: 72 static CompositorAnimations* instance(CompositorAnimations* newInstance) 73 { 74 static CompositorAnimations* instance = new CompositorAnimations(); 75 if (newInstance) { 76 instance = newInstance; 77 } 78 return instance; 79 } 80 }; 81 82 } // namespace WebCore 83 84 #endif 85
