/*

    Copyright (C) 2006 Nikolas Zimmermann <wildfox@kde.org>

    This file is part of the KDE project

    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

    aint 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"

#if ENABLE(SVG)

#include "SVGPaintServerGradient.h"

#include "GraphicsContext.h"

#include "RenderObject.h"

#include "RenderStyle.h"

#include "SVGGradientElement.h"

#include <QPainter>

#include <QPainterPath>

#include <QColor>

#include <QGradient>

namespace WebCore {

// Helper function used by linear & radial gradient

void SVGPaintServerGradient::fillColorArray(QGradient& gradient, const Vector<SVGGradientStop>& stops,

                                            float opacity) const

{

    for (unsigned i = 0; i < stops.size(); ++i) {

        float offset = stops[i].first;

        Color color = stops[i].second;

        QColor c(color.red(), color.green(), color.blue());

        c.setAlpha(int(color.alpha() * opacity));

        gradient.setColorAt(offset, c);

    }

}

bool SVGPaintServerGradient::setup(GraphicsContext*& context, const RenderObject* object,

                                   SVGPaintTargetType type, bool isPaintingText) const

{

    m_ownerElement->buildGradient();

    QPainter* painter(context ? context->platformContext() : 0);

    Q_ASSERT(painter);

    QPainterPath* path(context ? context->currentPath() : 0);

    Q_ASSERT(path);

    RenderStyle* renderStyle = object->style();

    QGradient gradient = setupGradient(context, object);

    painter->setPen(Qt::NoPen);

    painter->setBrush(Qt::NoBrush);

    if (spreadMethod() == SPREADMETHOD_REPEAT)

        gradient.setSpread(QGradient::RepeatSpread);

    else if (spreadMethod() == SPREADMETHOD_REFLECT)

        gradient.setSpread(QGradient::ReflectSpread);

    else

        gradient.setSpread(QGradient::PadSpread);    

    double opacity = 1.0;

    if ((type & ApplyToFillTargetType) && renderStyle->svgStyle()->hasFill()) {

        fillColorArray(gradient, gradientStops(), opacity);

        QBrush brush(gradient);

        brush.setMatrix(gradientTransform());

        painter->setBrush(brush);

        context->setFillRule(renderStyle->svgStyle()->fillRule());

    }

    if ((type & ApplyToStrokeTargetType) && renderStyle->svgStyle()->hasStroke()) {

        fillColorArray(gradient, gradientStops(), opacity);

        QPen pen;

        QBrush brush(gradient);

        brush.setMatrix(gradientTransform());

        setPenProperties(object, renderStyle, pen);

        pen.setBrush(brush);

        painter->setPen(pen);

    }

    return true;

}

} // namespace WebCore

#endif

// vim:ts=4:noet