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/*
* Copyright (C) 2009 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 COMPUTER, 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 COMPUTER, 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.
*/
#ifndef TransformState_h
#define TransformState_h
#include "AffineTransform.h"
#include "FloatPoint.h"
#include "FloatQuad.h"
#include "IntSize.h"
#include "TransformationMatrix.h"
#include <wtf/PassRefPtr.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class TransformState {
WTF_MAKE_NONCOPYABLE(TransformState);
public:
enum TransformDirection { ApplyTransformDirection, UnapplyInverseTransformDirection };
enum TransformAccumulation { FlattenTransform, AccumulateTransform };
// If quad is non-null, it will be mapped
TransformState(TransformDirection mappingDirection, const FloatPoint& p, const FloatQuad* quad = 0)
: m_lastPlanarPoint(p)
, m_accumulatingTransform(false)
, m_mapQuad(quad != 0)
, m_direction(mappingDirection)
{
if (quad)
m_lastPlanarQuad = *quad;
}
void move(const IntSize& s, TransformAccumulation accumulate = FlattenTransform)
{
move(s.width(), s.height(), accumulate);
}
void move(int x, int y, TransformAccumulation = FlattenTransform);
void applyTransform(const AffineTransform& transformFromContainer, TransformAccumulation = FlattenTransform);
void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation = FlattenTransform);
void flatten();
// Return the coords of the point or quad in the last flattened layer
FloatPoint lastPlanarPoint() const { return m_lastPlanarPoint; }
FloatQuad lastPlanarQuad() const { return m_lastPlanarQuad; }
// Return the point or quad mapped through the current transform
FloatPoint mappedPoint() const;
FloatQuad mappedQuad() const;
private:
void flattenWithTransform(const TransformationMatrix&);
FloatPoint m_lastPlanarPoint;
FloatQuad m_lastPlanarQuad;
// We only allocate the transform if we need to
OwnPtr<TransformationMatrix> m_accumulatedTransform;
bool m_accumulatingTransform;
bool m_mapQuad;
TransformDirection m_direction;
};
class HitTestingTransformState : public RefCounted<HitTestingTransformState> {
public:
static PassRefPtr<HitTestingTransformState> create(const FloatPoint& p, const FloatQuad& quad)
{
return adoptRef(new HitTestingTransformState(p, quad));
}
static PassRefPtr<HitTestingTransformState> create(const HitTestingTransformState& other)
{
return adoptRef(new HitTestingTransformState(other));
}
enum TransformAccumulation { FlattenTransform, AccumulateTransform };
void translate(int x, int y, TransformAccumulation);
void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation);
FloatPoint mappedPoint() const;
FloatQuad mappedQuad() const;
void flatten();
FloatPoint m_lastPlanarPoint;
FloatQuad m_lastPlanarQuad;
TransformationMatrix m_accumulatedTransform;
bool m_accumulatingTransform;
private:
HitTestingTransformState(const FloatPoint& p, const FloatQuad& quad)
: m_lastPlanarPoint(p)
, m_lastPlanarQuad(quad)
, m_accumulatingTransform(false)
{
}
HitTestingTransformState(const HitTestingTransformState& other)
: RefCounted<HitTestingTransformState>()
, m_lastPlanarPoint(other.m_lastPlanarPoint)
, m_lastPlanarQuad(other.m_lastPlanarQuad)
, m_accumulatedTransform(other.m_accumulatedTransform)
, m_accumulatingTransform(other.m_accumulatingTransform)
{
}
void flattenWithTransform(const TransformationMatrix&);
};
} // namespace WebCore
#endif // TransformState_h
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