/* | |
* 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. | |
*/ | |
#include "config.h" | |
#include "TransformState.h" | |
namespace WebCore { | |
void TransformState::move(int x, int y, TransformAccumulation accumulate) | |
{ | |
if (m_accumulatingTransform && m_accumulatedTransform) { | |
// If we're accumulating into an existing transform, apply the translation. | |
if (m_direction == ApplyTransformDirection) | |
m_accumulatedTransform->translateRight(x, y); | |
else | |
m_accumulatedTransform->translate(-x, -y); // We're unapplying, so negate | |
// Then flatten if necessary. | |
if (accumulate == FlattenTransform) | |
flatten(); | |
} else { | |
// Just move the point and, optionally, the quad. | |
m_lastPlanarPoint.move(x, y); | |
if (m_mapQuad) | |
m_lastPlanarQuad.move(x, y); | |
} | |
m_accumulatingTransform = accumulate == AccumulateTransform; | |
} | |
// FIXME: We transform AffineTransform to TransformationMatrix. This is rather inefficient. | |
void TransformState::applyTransform(const AffineTransform& transformFromContainer, TransformAccumulation accumulate) | |
{ | |
applyTransform(transformFromContainer.toTransformationMatrix(), accumulate); | |
} | |
void TransformState::applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation accumulate) | |
{ | |
// If we have an accumulated transform from last time, multiply in this transform | |
if (m_accumulatedTransform) { | |
if (m_direction == ApplyTransformDirection) | |
m_accumulatedTransform->multiply(transformFromContainer); | |
else | |
m_accumulatedTransform->multLeft(transformFromContainer); | |
} else if (accumulate == AccumulateTransform) { | |
// Make one if we started to accumulate | |
m_accumulatedTransform.set(new TransformationMatrix(transformFromContainer)); | |
} | |
if (accumulate == FlattenTransform) { | |
const TransformationMatrix* finalTransform = m_accumulatedTransform ? m_accumulatedTransform.get() : &transformFromContainer; | |
flattenWithTransform(*finalTransform); | |
} | |
m_accumulatingTransform = accumulate == AccumulateTransform; | |
} | |
void TransformState::flatten() | |
{ | |
if (!m_accumulatedTransform) { | |
m_accumulatingTransform = false; | |
return; | |
} | |
flattenWithTransform(*m_accumulatedTransform); | |
} | |
FloatPoint TransformState::mappedPoint() const | |
{ | |
if (!m_accumulatedTransform) | |
return m_lastPlanarPoint; | |
if (m_direction == ApplyTransformDirection) | |
return m_accumulatedTransform->mapPoint(m_lastPlanarPoint); | |
return m_accumulatedTransform->inverse().projectPoint(m_lastPlanarPoint); | |
} | |
FloatQuad TransformState::mappedQuad() const | |
{ | |
if (!m_accumulatedTransform) | |
return m_lastPlanarQuad; | |
if (m_direction == ApplyTransformDirection) | |
return m_accumulatedTransform->mapQuad(m_lastPlanarQuad); | |
return m_accumulatedTransform->inverse().projectQuad(m_lastPlanarQuad); | |
} | |
void TransformState::flattenWithTransform(const TransformationMatrix& t) | |
{ | |
if (m_direction == ApplyTransformDirection) { | |
m_lastPlanarPoint = t.mapPoint(m_lastPlanarPoint); | |
if (m_mapQuad) | |
m_lastPlanarQuad = t.mapQuad(m_lastPlanarQuad); | |
} else { | |
TransformationMatrix inverseTransform = t.inverse(); | |
m_lastPlanarPoint = inverseTransform.projectPoint(m_lastPlanarPoint); | |
if (m_mapQuad) | |
m_lastPlanarQuad = inverseTransform.projectQuad(m_lastPlanarQuad); | |
} | |
// We could throw away m_accumulatedTransform if we wanted to here, but that | |
// would cause thrash when traversing hierarchies with alternating | |
// preserve-3d and flat elements. | |
if (m_accumulatedTransform) | |
m_accumulatedTransform->makeIdentity(); | |
m_accumulatingTransform = false; | |
} | |
// HitTestingTransformState methods | |
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.multLeft(transformFromContainer); | |
if (accumulate == FlattenTransform) | |
flattenWithTransform(m_accumulatedTransform); | |
m_accumulatingTransform = accumulate == AccumulateTransform; | |
} | |
void HitTestingTransformState::flatten() | |
{ | |
flattenWithTransform(m_accumulatedTransform); | |
} | |
void HitTestingTransformState::flattenWithTransform(const TransformationMatrix& t) | |
{ | |
TransformationMatrix inverseTransform = t.inverse(); | |
m_lastPlanarPoint = inverseTransform.projectPoint(m_lastPlanarPoint); | |
m_lastPlanarQuad = inverseTransform.projectQuad(m_lastPlanarQuad); | |
m_accumulatedTransform.makeIdentity(); | |
m_accumulatingTransform = false; | |
} | |
FloatPoint HitTestingTransformState::mappedPoint() const | |
{ | |
return m_accumulatedTransform.inverse().projectPoint(m_lastPlanarPoint); | |
} | |
FloatQuad HitTestingTransformState::mappedQuad() const | |
{ | |
return m_accumulatedTransform.inverse().projectQuad(m_lastPlanarQuad); | |
} | |
} // namespace WebCore |