/*

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

 *               2008 Eric Seidel <eric@webkit.org>

 * Copyright (C) Research In Motion Limited 2010. All rights reserved.

 *

 * 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

 * along 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.

 *

 */

#ifndef RenderSVGResourceGradient_h

#define RenderSVGResourceGradient_h

#if ENABLE(SVG)

#include "AffineTransform.h"

#include "FloatRect.h"

#include "Gradient.h"

#include "ImageBuffer.h"

#include "RenderSVGResourceContainer.h"

#include "SVGGradientElement.h"

#include <wtf/HashMap.h>

namespace WebCore {

struct GradientData {

    RefPtr<Gradient> gradient;

    bool boundingBoxMode;

    AffineTransform userspaceTransform;

    AffineTransform transform;

};

class GraphicsContext;

class RenderSVGResourceGradient : public RenderSVGResourceContainer {

public:

    RenderSVGResourceGradient(SVGGradientElement*);

    virtual ~RenderSVGResourceGradient();

    virtual void invalidateClients();

    virtual void invalidateClient(RenderObject*);

    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);

    virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode);

    virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }

protected:

    void addStops(GradientData*, const Vector<Gradient::ColorStop>&) const;

    virtual void buildGradient(GradientData*, SVGGradientElement*) const = 0;

private:

    HashMap<RenderObject*, GradientData*> m_gradient;

#if PLATFORM(CG)

    GraphicsContext* m_savedContext;

    OwnPtr<ImageBuffer> m_imageBuffer;

#endif

};

}

#endif

#endif