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/*
* 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 "Color.h"
#include "SVGPaintServer.h"
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#if PLATFORM(QT)
class QGradient;
#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
};
#if PLATFORM(CG)
typedef std::pair<CGFloat, Color> SVGGradientStop;
#else
typedef std::pair<float, Color> SVGGradientStop;
#endif
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;
virtual bool setup(GraphicsContext*&, const RenderObject*, SVGPaintTargetType, bool isPaintingText) const;
#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(GraphicsContext*&, 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 Color& color)
{
return std::make_pair(offset, color);
}
} // namespace WebCore
#endif
#endif // SVGPaintServerGradient_h
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