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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/
#ifndef SCFACE_TTF_H
#define SCFACE_TTF_H
#include "scribusapi.h"
#include "fonts/ftface.h"
#include FT_TRUETYPE_TABLES_H
#include FT_TRUETYPE_TAGS_H
/**
An object holding a table of kerning pairs extracted from
a kern feature such as found in a GPOS table
*/
class SCRIBUS_API KernFeature
{
typedef QMap<quint16, QList<quint16> > ClassDefTable; // <Class index (0 to N) , list of glyphs >
public:
/**
* Build a ready-to-use kerning pairs table
* @param face a valid FT_Face, It won’t be store by KernFeature
*/
KernFeature ( FT_Face face );
KernFeature ( const KernFeature& kf );
~KernFeature();
/**
* Get the kerning value for a pair of glyph indexes.
* @param glyph1 Index of the left glyph in logical order
* @param glyph2 Index of the right glyph in logical order
* @return the unscaled delta to apply to xadvance of the first glyph
*/
double getPairValue ( unsigned int glyph1, unsigned int glyph2 ) const;
/**
* The table can have been invalidated if something went wrong at any moment.
* @return True if valid, False otherwise.
*/
bool isValid() const {return m_valid;}
private:
bool m_valid;
QByteArray GPOSTableRaw;
QMap<quint16,QList<quint16> > coverages;
mutable QMap<quint16, QMap<quint16, double> > pairs;
QMap< quint16, QMap<quint16, ClassDefTable> > classGlyphFirst; // < subtable offset, map<offset, class definition table> > for first glyph
QMap< quint16, QMap<quint16, ClassDefTable> > classGlyphSecond; // < subtable offset, map<offset, class definition table> > for second glyph
QMap< quint16, QMap<int, QMap<int, double> > > classValue; // < subtable offset, map<class1, map<class2, value> > >
void makeCoverage();
void makePairs ( quint16 subtableOffset );
ClassDefTable getClass (bool leftGlyph, quint16 classDefOffset, quint16 coverageId );
inline quint16 toUint16 ( quint16 index );
inline qint16 toInt16 ( quint16 index );
enum ValueFormat
{
XPlacement = 0x0001,
YPlacement = 0x0002,
XAdvance = 0x0004,
YAdvance = 0x0008,
XPlaDevice =0x0010,
YPlaDevice =0x0020,
XAdvDevice =0x0040,
YAdvDevice =0x0080
};
QString FontName;// for debugging purpose
};
/*
Class ScFace_ttf
Subclass of ScFace, specifically for TrueType fonts.
Implements: RealName() and EmbedFont().
*/
class SCRIBUS_API ScFace_ttf : public FtFace
{
public:
ScFace_ttf ( QString fam, QString sty, QString alt, QString scname, QString psname, QString path, int face );
~ScFace_ttf();
void load () const;
void unload () const;
bool EmbedFont(QString &str) const;
void RawData(QByteArray & bb) const;
qreal glyphKerning ( uint gl1, uint gl2, qreal sz ) const;
private:
mutable KernFeature * kernFeature;
};
#endif
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