/*

 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)

 *           (C) 2000 Antti Koivisto (koivisto@kde.org)

 *           (C) 2000 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. 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 StyleImage_h

#define StyleImage_h

#include "IntSize.h"

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

#include <wtf/RefPtr.h>

namespace WebCore {

class CSSValue;

class Image;

class RenderObject;

typedef void* WrappedImagePtr;

class StyleImage : public RefCounted<StyleImage> {

public:

    virtual ~StyleImage() { }

    bool operator==(const StyleImage& other)

    {

        return data() == other.data();

    }

    virtual PassRefPtr<CSSValue> cssValue() = 0;

    virtual bool canRender(float /*multiplier*/) const { return true; }

    virtual bool isLoaded() const { return true; }

    virtual bool errorOccurred() const { return false; }

    virtual IntSize imageSize(const RenderObject*, float multiplier) const = 0;

    virtual bool imageHasRelativeWidth() const = 0;

    virtual bool imageHasRelativeHeight() const = 0;

    virtual bool usesImageContainerSize() const = 0;

    virtual void setImageContainerSize(const IntSize&) = 0;

    virtual void addClient(RenderObject*) = 0;

    virtual void removeClient(RenderObject*) = 0;

    virtual Image* image(RenderObject*, const IntSize&) const = 0;

    virtual WrappedImagePtr data() const = 0;

    virtual bool isCachedImage() const { return false; }

    virtual bool isGeneratedImage() const { return false; }

    static  bool imagesEquivalent(StyleImage* image1, StyleImage* image2)

    {

        if (image1 != image2) {

            if (!image1 || !image2)

                return false;

            return *image1 == *image2;

        }

        return true;

    }

protected:

    StyleImage() { }

};

}

#endif