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/*
* Copyright (C) 2006-2021 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
*
* 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.
*/
#include "config.h"
#include "Gradient.h"
#include "FloatRect.h"
#include <wtf/HashFunctions.h>
#include <wtf/Hasher.h>
namespace WebCore {
Ref<Gradient> Gradient::create(Data&& data, ColorInterpolationMethod colorInterpolationMethod, GradientSpreadMethod spreadMethod, GradientColorStops&& stops)
{
return adoptRef(*new Gradient(WTFMove(data), colorInterpolationMethod, spreadMethod, WTFMove(stops)));
}
Gradient::Gradient(Data&& data, ColorInterpolationMethod colorInterpolationMethod, GradientSpreadMethod spreadMethod, GradientColorStops&& stops)
: m_data { WTFMove(data) }
, m_colorInterpolationMethod { colorInterpolationMethod }
, m_spreadMethod { spreadMethod }
, m_stops { WTFMove(stops) }
{
}
void Gradient::adjustParametersForTiledDrawing(FloatSize& size, FloatRect& srcRect, const FloatSize& spacing)
{
if (srcRect.isEmpty())
return;
if (!spacing.isZero())
return;
WTF::switchOn(m_data,
[&] (const LinearData& data) {
if (data.point0.x() == data.point1.x()) {
size.setWidth(1);
srcRect.setWidth(1);
srcRect.setX(0);
return;
}
if (data.point0.y() != data.point1.y())
return;
size.setHeight(1);
srcRect.setHeight(1);
srcRect.setY(0);
},
[] (const RadialData&) {
},
[] (const ConicData&) {
}
);
}
bool Gradient::isZeroSize() const
{
return WTF::switchOn(m_data,
[] (const LinearData& data) {
return data.point0.x() == data.point1.x() && data.point0.y() == data.point1.y();
},
[] (const RadialData& data) {
return data.point0.x() == data.point1.x() && data.point0.y() == data.point1.y() && data.startRadius == data.endRadius;
},
[] (const ConicData&) {
return false;
}
);
}
void Gradient::addColorStop(GradientColorStop&& stop)
{
m_stops.addColorStop(WTFMove(stop));
m_cachedHash = 0;
stopsChanged();
}
static void add(Hasher& hasher, const Gradient::LinearData& data)
{
add(hasher, data.point0, data.point1);
}
static void add(Hasher& hasher, const Gradient::RadialData& data)
{
add(hasher, data.point0, data.point1, data.startRadius, data.endRadius, data.aspectRatio);
}
static void add(Hasher& hasher, const Gradient::ConicData& data)
{
add(hasher, data.point0, data.angleRadians);
}
unsigned Gradient::hash() const
{
if (!m_cachedHash)
m_cachedHash = computeHash(m_data, m_colorInterpolationMethod, m_spreadMethod, m_stops.sorted());
return m_cachedHash;
}
}
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