File indexing completed on 2024-05-12 15:39:16

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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.
  */
 
 #ifndef SVGPaintServerGradient_h
 #define SVGPaintServerGradient_h
 
 #if ENABLE(SVG)
 
 #include "AffineTransform.h"
 #include "SVGPaintServer.h"
 
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>
 
 #if PLATFORM(QT)
 #include <qglobal.h>
 QT_BEGIN_NAMESPACE
 class QGradient;
 QT_END_NAMESPACE
 #endif
 
 namespace WebCore
 {
 
 class ImageBuffer;
 class SVGGradientElement;
 
 // FIXME: Remove the spread method enum in SVGGradientElement
 enum SVGGradientSpreadMethod {
     SPREADMETHOD_PAD = 1,
     SPREADMETHOD_REFLECT = 2,
     SPREADMETHOD_REPEAT = 3
 };
 
 typedef std::pair<float, QColor> SVGGradientStop;
 
 class SVGPaintServerGradient : public SVGPaintServer
 {
 public:
     virtual ~SVGPaintServerGradient();
 
     const Vector<SVGGradientStop> &gradientStops() const;
     void setGradientStops(const Vector<SVGGradientStop> &);
 
     SVGGradientSpreadMethod spreadMethod() const;
     void setGradientSpreadMethod(const SVGGradientSpreadMethod &);
 
     // Gradient start and end points are percentages when used in boundingBox mode.
     // For instance start point with value (0,0) is top-left and end point with
     // value (100, 100) is bottom-right. BoundingBox mode is enabled by default.
     bool boundingBoxMode() const;
     void setBoundingBoxMode(bool mode = true);
 
     AffineTransform gradientTransform() const;
     void setGradientTransform(const AffineTransform &);
 
     /*virtual TextStream& externalRepresentation(TextStream&) const;*/
 
     bool setup(QPainter *painter, QPainterPath *path, const RenderObject *, SVGPaintTargetType, bool isPaintingText) const override;
 #if PLATFORM(CG)
     virtual void teardown(GraphicsContext *&, const RenderObject *, SVGPaintTargetType, bool isPaintingText) const;
     virtual void renderPath(GraphicsContext *&, const RenderObject *, SVGPaintTargetType) const;
 
     virtual void invalidate();
 
     // Helpers
     void updateQuartzGradientStopsCache(const Vector<SVGGradientStop> &);
     void updateQuartzGradientCache(const SVGPaintServerGradient *);
     void handleBoundingBoxModeAndGradientTransformation(GraphicsContext *, const FloatRect &targetRect) const;
 #endif
 
 #if PLATFORM(QT)
 protected:
     void fillColorArray(QGradient &, const Vector<SVGGradientStop> &, float opacity) const;
     virtual QGradient setupGradient(QPainter *painter, QPainterPath *painterPath, const RenderObject *) const = 0;
 #endif
 
 protected:
     SVGPaintServerGradient(const SVGGradientElement *owner);
 
 private:
     Vector<SVGGradientStop> m_stops;
     SVGGradientSpreadMethod m_spreadMethod;
     bool m_boundingBoxMode;
     AffineTransform m_gradientTransform;
     const SVGGradientElement *m_ownerElement;
 
 #if PLATFORM(CG)
 public:
     typedef struct {
         CGFloat colorArray[4];
         CGFloat offset;
         CGFloat previousDeltaInverse;
     } QuartzGradientStop;
 
     struct SharedStopCache : public RefCounted<SharedStopCache> {
     public:
         static PassRefPtr<SharedStopCache> create()
         {
             return adoptRef(new SharedStopCache);
         }
 
         Vector<QuartzGradientStop> m_stops;
 
     private:
         SharedStopCache() { }
     };
 
     RefPtr<SharedStopCache> m_stopsCache;
 
     CGShadingRef m_shadingCache;
     mutable GraphicsContext *m_savedContext;
     mutable ImageBuffer *m_imageBuffer;
 #endif
 };
 
 inline SVGGradientStop makeGradientStop(float offset, const QColor &color)
 {
     return std::make_pair(offset, color);
 }
 
 } // namespace WebCore
 
 #endif
 
 #endif // SVGPaintServerGradient_h