blob: 831d14de19f15175cee35a3bea88b0f68a06ab06 [file] [log] [blame]
/*
* Copyright (C) 2018 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 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 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.
*/
#pragma once
#include <wtf/Markable.h>
#include <wtf/Seconds.h>
namespace WebCore {
inline double secondsToWebAnimationsAPITime(const Seconds time)
{
// Precision of time values
// https://drafts.csswg.org/web-animations-1/#precision-of-time-values
// The internal representation of time values is implementation dependent however, it is RECOMMENDED that user
// agents be able to represent input time values with microsecond precision so that a time value (which nominally
// represents milliseconds) of 0.001 is distinguishable from 0.0.
auto roundedTime = std::round(time.microseconds()) / 1000;
if (roundedTime == -0)
return 0;
return roundedTime;
}
const auto timeEpsilon = Seconds::fromMilliseconds(0.001);
struct WebAnimationsMarkableDoubleTraits {
static bool isEmptyValue(double value)
{
return std::isnan(value);
}
static constexpr double emptyValue()
{
return std::numeric_limits<double>::quiet_NaN();
}
};
using MarkableDouble = Markable<double, WebAnimationsMarkableDoubleTraits>;
} // namespace WebCore