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/*
* 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 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 "HitTestingTransformState.h"
#include "LayoutRect.h"
namespace WebCore {
void HitTestingTransformState::translate(int x, int y, TransformAccumulation accumulate)
{
m_accumulatedTransform.translate(x, y);
if (accumulate == FlattenTransform)
flattenWithTransform(m_accumulatedTransform);
m_accumulatingTransform = accumulate == AccumulateTransform;
}
void HitTestingTransformState::applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation accumulate)
{
m_accumulatedTransform.multiply(transformFromContainer);
if (accumulate == FlattenTransform)
flattenWithTransform(m_accumulatedTransform);
m_accumulatingTransform = accumulate == AccumulateTransform;
}
void HitTestingTransformState::flatten()
{
flattenWithTransform(m_accumulatedTransform);
}
void HitTestingTransformState::flattenWithTransform(const TransformationMatrix& t)
{
if (std::optional<TransformationMatrix> inverse = t.inverse()) {
m_lastPlanarPoint = inverse.value().projectPoint(m_lastPlanarPoint);
m_lastPlanarQuad = inverse.value().projectQuad(m_lastPlanarQuad);
m_lastPlanarArea = inverse.value().projectQuad(m_lastPlanarArea);
}
m_accumulatedTransform.makeIdentity();
m_accumulatingTransform = false;
}
FloatPoint HitTestingTransformState::mappedPoint() const
{
if (auto inverse = m_accumulatedTransform.inverse())
return inverse.value().projectPoint(m_lastPlanarPoint);
return m_lastPlanarPoint;
}
FloatQuad HitTestingTransformState::mappedQuad() const
{
if (auto inverse = m_accumulatedTransform.inverse())
return inverse.value().projectQuad(m_lastPlanarQuad);
return m_lastPlanarQuad;
}
FloatQuad HitTestingTransformState::mappedArea() const
{
if (auto inverse = m_accumulatedTransform.inverse())
return inverse.value().projectQuad(m_lastPlanarArea);
return m_lastPlanarArea;
}
LayoutRect HitTestingTransformState::boundsOfMappedArea() const
{
if (auto inverse = m_accumulatedTransform.inverse())
return inverse.value().clampedBoundsOfProjectedQuad(m_lastPlanarArea);
TransformationMatrix identity;
return identity.clampedBoundsOfProjectedQuad(m_lastPlanarArea);
}
} // namespace WebCore
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