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metrics.hh

// -*- related-file-name: "../../libefont/metrics.cc" -*-
#ifndef EFONT_METRICS_HH
#define EFONT_METRICS_HH
#include <lcdf/permstr.hh>
#include <lcdf/vector.hh>
#include <lcdf/hashmap.hh>
#include <efont/encoding.hh>
#include <efont/pairop.hh>
namespace Efont {
class MetricsXt;

class Metrics { public:

    Metrics();
    Metrics(PermString font_name, PermString full_name, const Metrics &);
    ~Metrics();
  
    void use()                      { _uses++; }
    void unuse()              { if (--_uses == 0) delete this; }
  
    // GLOBALS
  
    PermString font_name() const    { return _font_name; }
    PermString family() const       { return _family; }
    PermString full_name() const    { return _full_name; }
    PermString weight() const       { return _weight; }
    PermString version() const            { return _version; }
  
    void set_font_name(PermString);
    void set_family(PermString s)   { _family = s; }
    void set_full_name(PermString s)      { _full_name = s; }
    void set_weight(PermString s)   { _weight = s; }
    void set_version(PermString s)  { _version = s; }
  
    // GLYPHS
  
    int nglyphs() const             { return _names.size(); }
    PermString name(GlyphIndex gi) const { return _names[gi]; }
    GlyphIndex find(PermString n) const   { return _name_map[n]; }

    int code(GlyphIndex gi) const   { return _encoding.code(gi); }
    GlyphIndex find_code(int c) const     { return _encoding.find_code(c); }
    void set_code(GlyphIndex gi, int c)   { _encoding.set_code(gi, c); }
  
    GlyphIndex add_glyph(PermString);
    void reserve_glyphs(int);
  
    // DIMENSIONS
  
    double scale() const            { return _scale; }
    void set_scale(double d)        { _scale = d; }
  
    int nfd() const                 { return _fdv.size(); }
    int nkv() const                 { return _kernv.size(); }
  
    double fd(int i) const          { return _fdv[i]; }
    double wd(int i) const          { return _wdv[i]; }
    double lf(int i) const          { return _lfv[i]; }
    double rt(int i) const          { return _rtv[i]; }
    double tp(int i) const          { return _tpv[i]; }
    double bt(int i) const          { return _btv[i]; }
    double kv(int i) const          { return _kernv[i]; }
  
    double &fd(int i)               { return _fdv[i]; }
    double &wd(int i)               { return _wdv[i]; }
    double &lf(int i)               { return _lfv[i]; }
    double &rt(int i)               { return _rtv[i]; }
    double &tp(int i)               { return _tpv[i]; }
    double &bt(int i)               { return _btv[i]; }
    double &kv(int i)               { return _kernv[i]; }
  
    inline int add_kv(double d);
  
    void interpolate_dimens(const Metrics &, double, bool increment);
  
    // PAIR PROGRAM
  
    PairProgram *pair_program()                 { return &_pairp; }
    const PairProgram *pair_program() const     { return &_pairp; }
    inline bool add_kern(GlyphIndex, GlyphIndex, int);
    inline bool add_lig(GlyphIndex, GlyphIndex, GlyphIndex, int = opLigSimple);

    // EXTENSIONS

    MetricsXt *find_xt(PermString name) const   { return _xt[_xt_map[name]]; }
    void add_xt(MetricsXt *);

  private:
  
    PermString _font_name;
  
    PermString _family;
    PermString _full_name;
    PermString _weight;
    PermString _version;
  
    HashMap<PermString, GlyphIndex> _name_map;
    Vector<PermString> _names;
    Encoding8 _encoding;
  
    double _scale;
  
    Vector<double> _fdv;
    Vector<double> _wdv;
    Vector<double> _lfv;
    Vector<double> _rtv;
    Vector<double> _tpv;
    Vector<double> _btv;
  
    PairProgram _pairp;
    Vector<double> _kernv;
  
    HashMap<PermString, int> _xt_map;
    Vector<MetricsXt *> _xt;

    unsigned _uses;
  
};


class MetricsXt {
  
  public:
  
    MetricsXt()                           { }
    virtual ~MetricsXt()                        { }
  
    virtual PermString kind() const = 0;
  
    virtual void reserve_glyphs(int)            { }
  
};


enum FontDimensionDefs {
  
    fdCapHeight = 0,
    fdXHeight,
    fdAscender,
    fdDescender,
  
    fdItalicAngle,
    fdUnderlinePosition,
    fdUnderlineThickness,
  
    fdFontBBllx,
    fdFontBBlly,
    fdFontBBurx,
    fdFontBBury,
  
    fdStdHW,
    fdStdVW,
  
    fdLast
  
};


inline bool Metrics::add_kern(GlyphIndex g1, GlyphIndex g2, int ki)
{
    return _pairp.add_kern(g1, g2, ki);
}

inline bool Metrics::add_lig(GlyphIndex g1, GlyphIndex g2, GlyphIndex gr, int kind)
{
    return _pairp.add_lig(g1, g2, gr, kind);
}

inline int Metrics::add_kv(double d)
{
    int k = _kernv.size();
    _kernv.push_back(d);
    return k;
}

}
#endif

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