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