/* | |
* Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. | |
* Copyright (C) 2007 Alp Toker <alp@atoker.com> | |
* | |
* 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 "Gradient.h" | |
#include "CSSParser.h" | |
#include "GraphicsContext.h" | |
#include <QGradient> | |
#include <QPainter> | |
namespace WebCore { | |
void Gradient::platformDestroy() | |
{ | |
delete m_gradient; | |
m_gradient = 0; | |
} | |
QGradient* Gradient::platformGradient() | |
{ | |
if (m_gradient) | |
return m_gradient; | |
if (m_radial) | |
m_gradient = new QRadialGradient(m_p1.x(), m_p1.y(), m_r1, m_p0.x(), m_p0.y()); | |
else | |
m_gradient = new QLinearGradient(m_p0.x(), m_p0.y(), m_p1.x(), m_p1.y()); | |
sortStopsIfNecessary(); | |
QColor stopColor; | |
Vector<ColorStop>::iterator stopIterator = m_stops.begin(); | |
qreal lastStop(0.0); | |
const qreal lastStopDiff = 0.0000001; | |
while (stopIterator != m_stops.end()) { | |
stopColor.setRgbF(stopIterator->red, stopIterator->green, stopIterator->blue, stopIterator->alpha); | |
if (qFuzzyCompare(lastStop, qreal(stopIterator->stop))) | |
lastStop = stopIterator->stop + lastStopDiff; | |
else | |
lastStop = stopIterator->stop; | |
if (m_radial && m_r0) | |
lastStop = m_r0 / m_r1 + lastStop * (1.0f - m_r0 / m_r1); | |
m_gradient->setColorAt(qMin(lastStop, qreal(1.0f)), stopColor); | |
// Keep the lastStop as orginal value, since the following stopColor depend it | |
lastStop = stopIterator->stop; | |
++stopIterator; | |
} | |
if (m_stops.isEmpty()) { | |
// The behavior of QGradient with no stops is defined differently from HTML5 spec, | |
// where the latter requires the gradient to be transparent black. | |
m_gradient->setColorAt(0.0, QColor(0, 0, 0, 0)); | |
} | |
switch (m_spreadMethod) { | |
case SpreadMethodPad: | |
m_gradient->setSpread(QGradient::PadSpread); | |
break; | |
case SpreadMethodReflect: | |
m_gradient->setSpread(QGradient::ReflectSpread); | |
break; | |
case SpreadMethodRepeat: | |
m_gradient->setSpread(QGradient::RepeatSpread); | |
break; | |
} | |
return m_gradient; | |
} | |
void Gradient::fill(GraphicsContext* context, const FloatRect& rect) | |
{ | |
context->platformContext()->fillRect(rect, *platformGradient()); | |
} | |
} //namespace |