1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "config.h" 6 #include "core/animation/interpolation/Interpolation.h" 7 8 namespace WebCore { 9 10 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(Interpolation); 11 12 namespace { 13 14 bool typesMatch(const InterpolableValue* start, const InterpolableValue* end) 15 { 16 if (start->isNumber()) 17 return end->isNumber(); 18 if (start->isBool()) 19 return end->isBool(); 20 if (start->isAnimatableValue()) 21 return end->isAnimatableValue(); 22 if (!(start->isList() && end->isList())) 23 return false; 24 const InterpolableList* startList = toInterpolableList(start); 25 const InterpolableList* endList = toInterpolableList(end); 26 if (startList->length() != endList->length()) 27 return false; 28 for (size_t i = 0; i < startList->length(); ++i) { 29 if (!typesMatch(startList->get(i), endList->get(i))) 30 return false; 31 } 32 return true; 33 } 34 35 } 36 37 Interpolation::Interpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end) 38 : m_start(start) 39 , m_end(end) 40 , m_cachedFraction(0) 41 , m_cachedIteration(0) 42 , m_cachedValue(m_start->clone()) 43 { 44 RELEASE_ASSERT(typesMatch(m_start.get(), m_end.get())); 45 } 46 47 void Interpolation::interpolate(int iteration, double fraction) const 48 { 49 if (m_cachedFraction != fraction || m_cachedIteration != iteration) { 50 m_cachedValue = m_start->interpolate(*m_end, fraction); 51 m_cachedIteration = iteration; 52 m_cachedFraction = fraction; 53 } 54 } 55 56 void Interpolation::trace(Visitor* visitor) 57 { 58 visitor->trace(m_start); 59 visitor->trace(m_end); 60 visitor->trace(m_cachedValue); 61 } 62 63 } 64
