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#ifndef QTEXTUREGLYPHCACHE_P_H

#define QTEXTUREGLYPHCACHE_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <qhash.h>

#include <qimage.h>

#include <qobject.h>

#include <qtransform.h>

#include <private/qfontengineglyphcache_p.h>

#if defined(Q_OS_VXWORKS) && defined(m_type)

#  undef m_type

#endif

struct glyph_metrics_t;

typedef unsigned int glyph_t;

QT_BEGIN_NAMESPACE

class QTextItemInt;

class Q_GUI_EXPORT QTextureGlyphCache : public QFontEngineGlyphCache

{

public:

    QTextureGlyphCache(QFontEngineGlyphCache::Type type, const QTransform &matrix)

        : QFontEngineGlyphCache(matrix, type), m_w(0), m_h(0), m_cx(0), m_cy(0) { }

    virtual ~QTextureGlyphCache() { }

    struct Coord {

        int x;

        int y;

        int w;

        int h;

        int baseLineX;

        int baseLineY;

    };

    void populate(const QTextItemInt &ti,

                  const QVarLengthArray<glyph_t> &glyphs,

                  const QVarLengthArray<QFixedPoint> &positions);

    virtual void createTextureData(int width, int height) = 0;

    virtual void resizeTextureData(int width, int height) = 0;

    virtual int glyphMargin() const { return 0; }

    virtual void fillTexture(const Coord &coord, glyph_t glyph) = 0;

    inline void createCache(int width, int height) {

        m_w = width;

        m_h = height;

        createTextureData(width, height);

    }

    inline bool isNull() const { return m_w <= 0 || m_h <= 0; }

    QHash<glyph_t, Coord> coords;

    QImage textureMapForGlyph(glyph_t g) const;

protected:

    const QTextItemInt *m_current_textitem;

    int m_w; // image width

    int m_h; // image height

    int m_cx; // current x

    int m_cy; // current y

};

class QImageTextureGlyphCache : public QTextureGlyphCache

{

public:

    QImageTextureGlyphCache(QFontEngineGlyphCache::Type type, const QTransform &matrix)

        : QTextureGlyphCache(type, matrix) { }

    virtual int glyphMargin() const;

    virtual void createTextureData(int width, int height);

    virtual void resizeTextureData(int width, int height);

    virtual void fillTexture(const Coord &c, glyph_t glyph);

    inline const QImage &image() const { return m_image; }

private:

    QImage m_image;

};

QT_END_NAMESPACE

#endif