92 lines
3.6 KiB
C++
92 lines
3.6 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 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 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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#pragma once
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#include "FloatPoint.h"
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#include "FloatQuad.h"
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#include "IntSize.h"
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#include "TransformationMatrix.h"
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#include <wtf/Ref.h>
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#include <wtf/RefCounted.h>
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namespace WebCore {
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// FIXME: Now that TransformState lazily creates its TransformationMatrix it takes up less space.
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// So there's really no need for a ref counted version. So This class should be removed and replaced
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// with TransformState. There are some minor differences (like the way translate() works slightly
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// differently than move()) so care has to be taken when this is done.
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class HitTestingTransformState : public RefCounted<HitTestingTransformState> {
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public:
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static Ref<HitTestingTransformState> create(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area)
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{
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return adoptRef(*new HitTestingTransformState(p, quad, area));
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}
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static Ref<HitTestingTransformState> create(const HitTestingTransformState& other)
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{
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return adoptRef(*new HitTestingTransformState(other));
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}
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enum TransformAccumulation { FlattenTransform, AccumulateTransform };
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void translate(int x, int y, TransformAccumulation);
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void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation);
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FloatPoint mappedPoint() const;
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FloatQuad mappedQuad() const;
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FloatQuad mappedArea() const;
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LayoutRect boundsOfMappedArea() const;
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void flatten();
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FloatPoint m_lastPlanarPoint;
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FloatQuad m_lastPlanarQuad;
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FloatQuad m_lastPlanarArea;
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TransformationMatrix m_accumulatedTransform;
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bool m_accumulatingTransform;
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private:
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HitTestingTransformState(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area)
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: m_lastPlanarPoint(p)
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, m_lastPlanarQuad(quad)
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, m_lastPlanarArea(area)
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, m_accumulatingTransform(false)
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{
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}
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HitTestingTransformState(const HitTestingTransformState& other)
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: RefCounted<HitTestingTransformState>()
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, m_lastPlanarPoint(other.m_lastPlanarPoint)
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, m_lastPlanarQuad(other.m_lastPlanarQuad)
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, m_lastPlanarArea(other.m_lastPlanarArea)
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, m_accumulatedTransform(other.m_accumulatedTransform)
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, m_accumulatingTransform(other.m_accumulatingTransform)
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{
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}
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void flattenWithTransform(const TransformationMatrix&);
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};
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} // namespace WebCore
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