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/* This file is part of the KDE project
* Copyright (C) 2007,2009 Jan Hambrecht <jaham@gmx.net>
* Copyright (C) 2010 Thorsten Zachmann <zachmann@kde.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 "SvgGradientHelper.h"
#include <cmath>
#include <KoFlake.h>
SvgGradientHelper::SvgGradientHelper()
: m_gradient(0), m_gradientUnits(ObjectBoundingBox)
{
}
SvgGradientHelper::~SvgGradientHelper()
{
delete m_gradient;
}
SvgGradientHelper::SvgGradientHelper(const SvgGradientHelper &other)
: m_gradient(0), m_gradientUnits(ObjectBoundingBox)
{
m_gradientUnits = other.m_gradientUnits;
m_gradientTransform = other.m_gradientTransform;
copyGradient(other.m_gradient);
}
SvgGradientHelper & SvgGradientHelper::operator = (const SvgGradientHelper & rhs)
{
if (this == &rhs)
return *this;
m_gradientUnits = rhs.m_gradientUnits;
m_gradientTransform = rhs.m_gradientTransform;
copyGradient(rhs.m_gradient);
return *this;
}
void SvgGradientHelper::setGradientUnits(Units units)
{
m_gradientUnits = units;
}
SvgGradientHelper::Units SvgGradientHelper::gradientUnits() const
{
return m_gradientUnits;
}
QGradient * SvgGradientHelper::gradient()
{
return m_gradient;
}
void SvgGradientHelper::setGradient(QGradient * g)
{
delete m_gradient;
m_gradient = g;
}
void SvgGradientHelper::copyGradient(QGradient * other)
{
delete m_gradient;
m_gradient = duplicateGradient(other, QTransform());
}
QBrush SvgGradientHelper::adjustedFill(const QRectF &bound)
{
QBrush brush;
QGradient * g = adjustedGradient(bound);
if (g) {
brush = QBrush(*g);
delete g;
}
return brush;
}
QTransform SvgGradientHelper::transform() const
{
return m_gradientTransform;
}
void SvgGradientHelper::setTransform(const QTransform &transform)
{
m_gradientTransform = transform;
}
QGradient * SvgGradientHelper::adjustedGradient(const QRectF &bound) const
{
QTransform matrix;
matrix.scale(0.01 * bound.width(), 0.01 * bound.height());
return duplicateGradient(m_gradient, matrix);
}
QGradient * SvgGradientHelper::duplicateGradient(const QGradient * originalGradient, const QTransform &transform)
{
if (! originalGradient)
return 0;
QGradient * duplicatedGradient = 0;
switch (originalGradient->type()) {
case QGradient::ConicalGradient: {
const QConicalGradient * o = static_cast<const QConicalGradient*>(originalGradient);
QConicalGradient * g = new QConicalGradient();
g->setAngle(o->angle());
g->setCenter(transform.map(o->center()));
duplicatedGradient = g;
}
break;
case QGradient::LinearGradient: {
const QLinearGradient * o = static_cast<const QLinearGradient*>(originalGradient);
QLinearGradient * g = new QLinearGradient();
g->setStart(transform.map(o->start()));
g->setFinalStop(transform.map(o->finalStop()));
duplicatedGradient = g;
}
break;
case QGradient::RadialGradient: {
const QRadialGradient * o = static_cast<const QRadialGradient*>(originalGradient);
QRadialGradient * g = new QRadialGradient();
g->setCenter(transform.map(o->center()));
g->setFocalPoint(transform.map(o->focalPoint()));
g->setRadius(transform.map(QPointF(o->radius(), 0.0)).x());
duplicatedGradient = g;
}
break;
default:
return 0;
}
duplicatedGradient->setCoordinateMode(originalGradient->coordinateMode());
duplicatedGradient->setStops(originalGradient->stops());
duplicatedGradient->setSpread(originalGradient->spread());
return duplicatedGradient;
}
QGradient *SvgGradientHelper::convertGradient(const QGradient *originalGradient, const QSizeF &size)
{
if (! originalGradient)
return 0;
if (originalGradient->coordinateMode() != QGradient::LogicalMode) {
return duplicateGradient(originalGradient, QTransform());
}
QGradient *duplicatedGradient = 0;
switch (originalGradient->type()) {
case QGradient::ConicalGradient:
{
const QConicalGradient *o = static_cast<const QConicalGradient*>(originalGradient);
QConicalGradient *g = new QConicalGradient();
g->setAngle(o->angle());
g->setCenter(KoFlake::toRelative(o->center(),size));
duplicatedGradient = g;
}
break;
case QGradient::LinearGradient:
{
const QLinearGradient *o = static_cast<const QLinearGradient*>(originalGradient);
QLinearGradient *g = new QLinearGradient();
g->setStart(KoFlake::toRelative(o->start(),size));
g->setFinalStop(KoFlake::toRelative(o->finalStop(),size));
duplicatedGradient = g;
}
break;
case QGradient::RadialGradient:
{
const QRadialGradient *o = static_cast<const QRadialGradient*>(originalGradient);
QRadialGradient *g = new QRadialGradient();
g->setCenter(KoFlake::toRelative(o->center(),size));
g->setFocalPoint(KoFlake::toRelative(o->focalPoint(),size));
g->setRadius(KoFlake::toRelative(QPointF(o->radius(), 0.0),
QSizeF(sqrt(size.width() * size.width() + size.height() * size.height()), 0.0)).x());
duplicatedGradient = g;
}
break;
default:
return 0;
}
duplicatedGradient->setCoordinateMode(QGradient::ObjectBoundingMode);
duplicatedGradient->setStops(originalGradient->stops());
duplicatedGradient->setSpread(originalGradient->spread());
return duplicatedGradient;
}
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