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/*
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "core/svg/SVGTransformDistance.h"
#include "platform/geometry/FloatPoint.h"
#include "platform/geometry/FloatSize.h"
#include <math.h>
namespace WebCore {
SVGTransformDistance::SVGTransformDistance()
: m_transformType(SVG_TRANSFORM_UNKNOWN)
, m_angle(0)
, m_cx(0)
, m_cy(0)
{
}
SVGTransformDistance::SVGTransformDistance(SVGTransformType transformType, float angle, float cx, float cy, const AffineTransform& transform)
: m_transformType(transformType)
, m_angle(angle)
, m_cx(cx)
, m_cy(cy)
, m_transform(transform)
{
}
SVGTransformDistance::SVGTransformDistance(PassRefPtr<SVGTransform> passFromSVGTransform, PassRefPtr<SVGTransform> passToSVGTransform)
: m_angle(0)
, m_cx(0)
, m_cy(0)
{
RefPtr<SVGTransform> fromSVGTransform = passFromSVGTransform;
RefPtr<SVGTransform> toSVGTransform = passToSVGTransform;
m_transformType = fromSVGTransform->transformType();
ASSERT(m_transformType == toSVGTransform->transformType());
switch (m_transformType) {
case SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
case SVG_TRANSFORM_UNKNOWN:
break;
case SVG_TRANSFORM_ROTATE: {
FloatSize centerDistance = toSVGTransform->rotationCenter() - fromSVGTransform->rotationCenter();
m_angle = toSVGTransform->angle() - fromSVGTransform->angle();
m_cx = centerDistance.width();
m_cy = centerDistance.height();
break;
}
case SVG_TRANSFORM_TRANSLATE: {
FloatSize translationDistance = toSVGTransform->translate() - fromSVGTransform->translate();
m_transform.translate(translationDistance.width(), translationDistance.height());
break;
}
case SVG_TRANSFORM_SCALE: {
float scaleX = toSVGTransform->scale().width() - fromSVGTransform->scale().width();
float scaleY = toSVGTransform->scale().height() - fromSVGTransform->scale().height();
m_transform.scaleNonUniform(scaleX, scaleY);
break;
}
case SVG_TRANSFORM_SKEWX:
case SVG_TRANSFORM_SKEWY:
m_angle = toSVGTransform->angle() - fromSVGTransform->angle();
break;
}
}
SVGTransformDistance SVGTransformDistance::scaledDistance(float scaleFactor) const
{
switch (m_transformType) {
case SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
case SVG_TRANSFORM_UNKNOWN:
return SVGTransformDistance();
case SVG_TRANSFORM_ROTATE:
return SVGTransformDistance(m_transformType, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform());
case SVG_TRANSFORM_SCALE:
return SVGTransformDistance(m_transformType, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform(m_transform).scale(scaleFactor));
case SVG_TRANSFORM_TRANSLATE: {
AffineTransform newTransform(m_transform);
newTransform.setE(m_transform.e() * scaleFactor);
newTransform.setF(m_transform.f() * scaleFactor);
return SVGTransformDistance(m_transformType, 0, 0, 0, newTransform);
}
case SVG_TRANSFORM_SKEWX:
case SVG_TRANSFORM_SKEWY:
return SVGTransformDistance(m_transformType, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform());
}
ASSERT_NOT_REACHED();
return SVGTransformDistance();
}
PassRefPtr<SVGTransform> SVGTransformDistance::addSVGTransforms(PassRefPtr<SVGTransform> passFirst, PassRefPtr<SVGTransform> passSecond, unsigned repeatCount)
{
RefPtr<SVGTransform> first = passFirst;
RefPtr<SVGTransform> second = passSecond;
ASSERT(first->transformType() == second->transformType());
RefPtr<SVGTransform> transform = SVGTransform::create();
switch (first->transformType()) {
case SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
case SVG_TRANSFORM_UNKNOWN:
return transform.release();
case SVG_TRANSFORM_ROTATE: {
transform->setRotate(first->angle() + second->angle() * repeatCount, first->rotationCenter().x() + second->rotationCenter().x() * repeatCount, first->rotationCenter().y() + second->rotationCenter().y() * repeatCount);
return transform.release();
}
case SVG_TRANSFORM_TRANSLATE: {
float dx = first->translate().x() + second->translate().x() * repeatCount;
float dy = first->translate().y() + second->translate().y() * repeatCount;
transform->setTranslate(dx, dy);
return transform.release();
}
case SVG_TRANSFORM_SCALE: {
FloatSize scale = second->scale();
scale.scale(repeatCount);
scale += first->scale();
transform->setScale(scale.width(), scale.height());
return transform.release();
}
case SVG_TRANSFORM_SKEWX:
transform->setSkewX(first->angle() + second->angle() * repeatCount);
return transform.release();
case SVG_TRANSFORM_SKEWY:
transform->setSkewY(first->angle() + second->angle() * repeatCount);
return transform.release();
}
ASSERT_NOT_REACHED();
return transform.release();
}
PassRefPtr<SVGTransform> SVGTransformDistance::addToSVGTransform(PassRefPtr<SVGTransform> passTransform) const
{
RefPtr<SVGTransform> transform = passTransform;
ASSERT(m_transformType == transform->transformType() || m_transformType == SVG_TRANSFORM_UNKNOWN);
RefPtr<SVGTransform> newTransform = transform->clone();
switch (m_transformType) {
case SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
case SVG_TRANSFORM_UNKNOWN:
return SVGTransform::create();
case SVG_TRANSFORM_TRANSLATE: {
FloatPoint translation = transform->translate();
translation += FloatSize::narrowPrecision(m_transform.e(), m_transform.f());
newTransform->setTranslate(translation.x(), translation.y());
return newTransform.release();
}
case SVG_TRANSFORM_SCALE: {
FloatSize scale = transform->scale();
scale += FloatSize::narrowPrecision(m_transform.a(), m_transform.d());
newTransform->setScale(scale.width(), scale.height());
return newTransform.release();
}
case SVG_TRANSFORM_ROTATE: {
FloatPoint center = transform->rotationCenter();
newTransform->setRotate(transform->angle() + m_angle, center.x() + m_cx, center.y() + m_cy);
return newTransform.release();
}
case SVG_TRANSFORM_SKEWX:
newTransform->setSkewX(transform->angle() + m_angle);
return newTransform.release();
case SVG_TRANSFORM_SKEWY:
newTransform->setSkewY(transform->angle() + m_angle);
return newTransform.release();
}
ASSERT_NOT_REACHED();
return newTransform.release();
}
float SVGTransformDistance::distance() const
{
switch (m_transformType) {
case SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
case SVG_TRANSFORM_UNKNOWN:
return 0;
case SVG_TRANSFORM_ROTATE:
return sqrtf(m_angle * m_angle + m_cx * m_cx + m_cy * m_cy);
case SVG_TRANSFORM_SCALE:
return static_cast<float>(sqrt(m_transform.a() * m_transform.a() + m_transform.d() * m_transform.d()));
case SVG_TRANSFORM_TRANSLATE:
return static_cast<float>(sqrt(m_transform.e() * m_transform.e() + m_transform.f() * m_transform.f()));
case SVG_TRANSFORM_SKEWX:
case SVG_TRANSFORM_SKEWY:
return m_angle;
}
ASSERT_NOT_REACHED();
return 0;
}
}
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