/*

 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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 CanvasStyle_h

#define CanvasStyle_h

#include "Color.h"

#include "PlatformString.h"

namespace WebCore {

    class CanvasGradient;

    class CanvasPattern;

    class GraphicsContext;

    class CanvasStyle : public RefCounted<CanvasStyle> {

    public:

        static PassRefPtr<CanvasStyle> create(RGBA32 rgba) { return adoptRef(new CanvasStyle(rgba)); }

        static PassRefPtr<CanvasStyle> create(const String& color);

        static PassRefPtr<CanvasStyle> create(const String& color, float alpha);

        static PassRefPtr<CanvasStyle> create(float grayLevel) { return adoptRef(new CanvasStyle(grayLevel)); }

        static PassRefPtr<CanvasStyle> create(float grayLevel, float alpha) { return adoptRef(new CanvasStyle(grayLevel, alpha)); }

        static PassRefPtr<CanvasStyle> create(float r, float g, float b, float a) { return adoptRef(new CanvasStyle(r, g, b, a)); }

        static PassRefPtr<CanvasStyle> create(float c, float m, float y, float k, float a) { return adoptRef(new CanvasStyle(c, m, y, k, a)); }

        static PassRefPtr<CanvasStyle> create(PassRefPtr<CanvasGradient> gradient);

        static PassRefPtr<CanvasStyle> create(PassRefPtr<CanvasPattern> pattern);

        String color() const { return Color(m_rgba).serialized(); }

        CanvasGradient* canvasGradient() const { return m_gradient.get(); }

        CanvasPattern* canvasPattern() const { return m_pattern.get(); }

        void applyFillColor(GraphicsContext*);

        void applyStrokeColor(GraphicsContext*);

        bool isEquivalentColor(const CanvasStyle&) const;

    private:

        CanvasStyle(RGBA32 rgba);

        CanvasStyle(float grayLevel);

        CanvasStyle(float grayLevel, float alpha);

        CanvasStyle(float r, float g, float b, float a);

        CanvasStyle(float c, float m, float y, float k, float a);

        CanvasStyle(PassRefPtr<CanvasGradient>);

        CanvasStyle(PassRefPtr<CanvasPattern>);

        enum Type { RGBA, CMYKA, Gradient, ImagePattern };

        Type m_type;

        RGBA32 m_rgba;

        RefPtr<CanvasGradient> m_gradient;

        RefPtr<CanvasPattern> m_pattern;

        struct CMYKAValues {

            CMYKAValues() {}

            CMYKAValues(float cyan, float magenta, float yellow, float black, float alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) {}

            float c;

            float m;

            float y;

            float k;

            float a;

        } m_cmyka;

    };

} // namespace WebCore

#endif