/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtOpenGL module of the Qt Toolkit.

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** No Commercial Usage

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef QGLCOLORMAP_H

#define QGLCOLORMAP_H

#include <QtGui/qcolor.h>

#include <QtCore/qvector.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(OpenGL)

class Q_OPENGL_EXPORT QGLColormap

{

public:

    QGLColormap();

    QGLColormap(const QGLColormap &);

    ~QGLColormap();

    QGLColormap &operator=(const QGLColormap &);

    bool   isEmpty() const;

    int    size() const;

    void   detach();

    void   setEntries(int count, const QRgb * colors, int base = 0);

    void   setEntry(int idx, QRgb color);

    void   setEntry(int idx, const QColor & color);

    QRgb   entryRgb(int idx) const;

    QColor entryColor(int idx) const;

    int    find(QRgb color) const;

    int    findNearest(QRgb color) const;

protected:

    Qt::HANDLE handle() { return d ? d->cmapHandle : 0; }

    void setHandle(Qt::HANDLE ahandle) { d->cmapHandle = ahandle; }

private:

    struct QGLColormapData {

        QBasicAtomicInt ref;

        QVector<QRgb> *cells;

        Qt::HANDLE cmapHandle;

    };

    QGLColormapData *d;

    static struct QGLColormapData shared_null;

    static void cleanup(QGLColormapData *x);

    void detach_helper();

    friend class QGLWidget;

    friend class QGLWidgetPrivate;

};

inline void QGLColormap::detach()

{

    if (d->ref != 1)

        detach_helper();

}

QT_END_NAMESPACE

QT_END_HEADER

#endif // QGLCOLORMAP_H