qfontengine_p.h

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    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
				    const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int lineThickness() const;
    int underlinePosition() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const;
    const char *name() const;

    void setScale( double scale );
    double scale() const { return _scale; }

    bool canRender( const QChar *string,  int len );

    Type type() const;
    XftPattern *pattern() const { return _pattern; }
    FT_Face face() const { return _face; }
    XftFont *font() const { return _font; }

    void recalcAdvances( int len, glyph_t *glyphs, advance_t *advances );

private:
    friend class QFontPrivate;
    friend class QOpenType;
    XftFont *_font;
    XftPattern *_pattern;
    FT_Face _face;
    QOpenType *_openType;
    int _cmap;
    short lbearing;
    short rbearing;
    float _scale;
    enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
    unsigned char widthCache[widthCacheSize];
    glyph_t cmapCache[cmapCacheSize];
};
#endif

class QFontEngineLatinXLFD;

class QFontEngineXLFD : public QFontEngine
{
public:
    QFontEngineXLFD( XFontStruct *fs, const char *name, int cmap );
    ~QFontEngineXLFD();

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
				    const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const;
    const char *name() const;

    bool canRender( const QChar *string,  int len );

    void setScale( double scale );
    double scale() const { return _scale; }
    Type type() const;

    Qt::HANDLE handle() const { return (Qt::HANDLE) _fs->fid; }

private:
    friend class QFontPrivate;
    XFontStruct *_fs;
    QCString _name;
    QTextCodec *_codec;
    float _scale; // needed for printing, to correctly scale font metrics for bitmap fonts
    int _cmap;
    short lbearing;
    short rbearing;
    enum XlfdTransformations {
	XlfdTrUnknown,
	XlfdTrSupported,
	XlfdTrUnsupported
    };
    XlfdTransformations xlfd_transformations;

    friend class QFontEngineLatinXLFD;
};

class QFontEngineLatinXLFD : public QFontEngine
{
public:
    QFontEngineLatinXLFD( XFontStruct *xfs, const char *name, int cmap );
    ~QFontEngineLatinXLFD();

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs,
			advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine,
	       const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
					 const advance_t *advances,
					 const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const { return -1; } // ###
    const char *name() const;

    bool canRender( const QChar *string,  int len );

    void setScale( double scale );
    double scale() const { return _engines[0]->scale(); }
    Type type() const { return LatinXLFD; }

    Qt::HANDLE handle() const { return ((QFontEngineXLFD *) _engines[0])->handle(); }

private:
    void findEngine( const QChar &ch );

    QFontEngine **_engines;
    int _count;

    glyph_t   glyphIndices [0x200];
    advance_t glyphAdvances[0x200];
    glyph_t euroIndex;
    advance_t euroAdvance;
};

class QScriptItem;
class QTextEngine;

#ifndef QT_NO_XFTFREETYPE

#include "qscriptengine_p.h"
#include "qtextengine_p.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include "ftxopen.h"

enum { PositioningProperties = 0x80000000 };

class QOpenType
{
public:
    QOpenType(QFontEngineXft *fe);
    ~QOpenType();

    struct Features {
        uint tag;
        uint property;
    };

    bool supportsScript(unsigned int script) {
        Q_ASSERT(script < QFont::NScripts);
        return supported_scripts[script];
    }
    void selectScript(unsigned int script, const Features *features = 0);
    
    bool shape(QShaperItem *item, const unsigned int *properties = 0);
    bool positionAndAdd(QShaperItem *item, bool doLogClusters = TRUE);

    OTL_GlyphItem glyphs() const { return otl_buffer->in_string; }
    int len() const { return otl_buffer->in_length; }
    void setProperty(int index, uint property) { otl_buffer->in_string[index].properties = property; }


private: 
    bool checkScript(unsigned int script);
    QFontEngine *fontEngine;
    FT_Face face;
    TTO_GDEF gdef;
    TTO_GSUB gsub;
    TTO_GPOS gpos;
    bool supported_scripts[QFont::NScripts];
    FT_ULong current_script;
    bool positioned : 1;
    OTL_Buffer otl_buffer;
    GlyphAttributes *tmpAttributes;
    unsigned int *tmpLogClusters;
    int length;
    int orig_nglyphs;
    int loadFlags;
};

#endif // QT_NO_XFTFREETYPE

#elif defined( Q_WS_MAC )
#include "qt_mac.h"
#include <qmap.h>
#include <qcache.h>

class QFontEngineMac : public QFontEngine
{
#if 0
    ATSFontMetrics *info;
#else
    FontInfo *info;
#endif
    int psize;
    FMFontFamily fmfam;
    QMacFontInfo *internal_fi;
    mutable ATSUTextLayout mTextLayout;
    enum { widthCacheSize = 0x500 };
    mutable unsigned char widthCache[widthCacheSize];
    friend class QFont;
    friend class QGLContext;
    friend class QFontPrivate;
    friend class QMacSetFontInfo;

public:
    QFontEngineMac();
    ~QFontEngineMac();

    Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    glyph_metrics_t boundingBox( const glyph_t *glyphs,
			       const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const { return (int)info->ascent; }
    int descent() const { return (int)info->descent; }
    int leading() const { return (int)info->leading; }
#if 0
    int maxCharWidth() const { return (int)info->maxAdvanceWidth; }
#else
    int maxCharWidth() const { return info->widMax; }
#endif

    const char *name() const { return "ATSUI"; }

    bool canRender( const QChar *string,  int len );

    Type type() const { return QFontEngine::Mac; }

    void calculateCost();

    enum { WIDTH=0x01, DRAW=0x02, EXISTS=0x04 };
    int doTextTask(const QChar *s, int pos, int use_len, int len, uchar task, int =-1, int y=-1,
		   QPaintDevice *dev=NULL, const QRegion *rgn=NULL) const;
};

#elif defined( Q_WS_WIN )

class QFontEngineWin : public QFontEngine
{
public:
    QFontEngineWin( const char *name, HDC, HFONT, bool, LOGFONT );

    Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    glyph_metrics_t boundingBox( const glyph_t *glyphs,
			       const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    const char *name() const;

    bool canRender( const QChar *string,  int len );

    Type type() const;

    enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
    unsigned char widthCache[widthCacheSize];
};

#if 0
class QFontEngineUniscribe : public QFontEngineWin
{
public:
    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
    bool canRender( const QChar *string,  int len );

    Type type() const;
};
#endif

#endif // Q_WS_WIN

#endif