/* * Copyright (C) 2011 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef AnimationUtilities_h #define AnimationUtilities_h #include "platform/LayoutUnit.h" #include "platform/PlatformExport.h" #include "platform/geometry/FloatPoint.h" #include "platform/geometry/IntPoint.h" #include "wtf/MathExtras.h" #include "wtf/TypeTraits.h" namespace WebCore { inline int blend(int from, int to, double progress) { return lround(from + (to - from) * progress); } // For unsigned types. template <typename T> inline T blend(T from, T to, double progress) { COMPILE_ASSERT(WTF::IsInteger<T>::value, BlendForUnsignedTypes); return clampTo<T>(round(to > from ? from + (to - from) * progress : from - (from - to) * progress)); } inline double blend(double from, double to, double progress) { return from + (to - from) * progress; } inline float blend(float from, float to, double progress) { return static_cast<float>(from + (to - from) * progress); } inline LayoutUnit blend(LayoutUnit from, LayoutUnit to, double progress) { return from + (to - from) * progress; } inline IntPoint blend(const IntPoint& from, const IntPoint& to, double progress) { return IntPoint(blend(from.x(), to.x(), progress), blend(from.y(), to.y(), progress)); } inline FloatPoint blend(const FloatPoint& from, const FloatPoint& to, double progress) { return FloatPoint(blend(from.x(), to.x(), progress), blend(from.y(), to.y(), progress)); } // Calculates the accuracy for evaluating a timing function for an animation with the specified duration. inline double accuracyForDuration(double duration) { return 1.0 / (200.0 * duration); } } // namespace WebCore #endif // AnimationUtilities_h