1 /* 2 * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp (at) atoker.com> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "Gradient.h" 29 30 #include "CSSParser.h" 31 #include "GraphicsContext.h" 32 33 #include <QGradient> 34 #include <QPainter> 35 36 namespace WebCore { 37 38 void Gradient::platformDestroy() 39 { 40 delete m_gradient; 41 m_gradient = 0; 42 } 43 44 QGradient* Gradient::platformGradient() 45 { 46 if (m_gradient) 47 return m_gradient; 48 49 if (m_radial) 50 m_gradient = new QRadialGradient(m_p1.x(), m_p1.y(), m_r1, m_p0.x(), m_p0.y()); 51 else 52 m_gradient = new QLinearGradient(m_p0.x(), m_p0.y(), m_p1.x(), m_p1.y()); 53 54 QColor stopColor; 55 Vector<ColorStop>::iterator stopIterator = m_stops.begin(); 56 qreal lastStop(0.0); 57 const qreal lastStopDiff = 0.0000001; 58 while (stopIterator != m_stops.end()) { 59 stopColor.setRgbF(stopIterator->red, stopIterator->green, stopIterator->blue, stopIterator->alpha); 60 if (qFuzzyCompare(lastStop, qreal(stopIterator->stop))) 61 lastStop = stopIterator->stop + lastStopDiff; 62 else 63 lastStop = stopIterator->stop; 64 if (m_radial && m_r0) 65 lastStop = m_r0 / m_r1 + lastStop * (1.0f - m_r0 / m_r1); 66 m_gradient->setColorAt(lastStop, stopColor); 67 ++stopIterator; 68 } 69 70 switch (m_spreadMethod) { 71 case SpreadMethodPad: 72 m_gradient->setSpread(QGradient::PadSpread); 73 break; 74 case SpreadMethodReflect: 75 m_gradient->setSpread(QGradient::ReflectSpread); 76 break; 77 case SpreadMethodRepeat: 78 m_gradient->setSpread(QGradient::RepeatSpread); 79 break; 80 } 81 82 return m_gradient; 83 } 84 85 void Gradient::fill(GraphicsContext* context, const FloatRect& rect) 86 { 87 context->platformContext()->fillRect(rect, *platformGradient()); 88 } 89 90 } //namespace 91