diff options
Diffstat (limited to 'Build/source/texk/lcdf-typetools/lcdf-typetools-2.101/include/efont/otfgpos.hh')
-rw-r--r-- | Build/source/texk/lcdf-typetools/lcdf-typetools-2.101/include/efont/otfgpos.hh | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/Build/source/texk/lcdf-typetools/lcdf-typetools-2.101/include/efont/otfgpos.hh b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.101/include/efont/otfgpos.hh new file mode 100644 index 00000000000..84de5a2126b --- /dev/null +++ b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.101/include/efont/otfgpos.hh @@ -0,0 +1,249 @@ +// -*- related-file-name: "../../libefont/otfgpos.cc" -*- +#ifndef EFONT_OTFGPOS_HH +#define EFONT_OTFGPOS_HH +#include <efont/otf.hh> +#include <efont/otfdata.hh> +namespace Efont { namespace OpenType { +class GposLookup; +class Positioning; + +class Gpos { public: + + Gpos(const Data &, ErrorHandler * = 0) throw (Error); + // default destructor + + const ScriptList &script_list() const { return _script_list; } + const FeatureList &feature_list() const { return _feature_list; } + + int nlookups() const; + GposLookup lookup(unsigned) const; + + enum { HEADERSIZE = 10 }; + + private: + + ScriptList _script_list; + FeatureList _feature_list; + Data _lookup_list; + +}; + +class GposLookup { public: + GposLookup(const Data &) throw (Error); + int type() const { return _type; } + uint16_t flags() const { return _d.u16(2); } + bool unparse_automatics(Vector<Positioning> &, ErrorHandler * = 0) const; + enum { + HEADERSIZE = 6, RECSIZE = 2, + L_SINGLE = 1, L_PAIR = 2, L_CURSIVE = 3, L_MARKTOBASE = 4, + L_MARKTOLIGATURE = 5, L_MARKTOMARK = 6, L_CONTEXT = 7, + L_CHAIN = 8, L_EXTENSION = 9 + }; + private: + Data _d; + int _type; + Data subtable(int i) const; +}; + +class GposValue { public: + static inline int size(uint16_t format); + static inline int16_t xplacement(uint16_t format, const Data &); + static inline int16_t yplacement(uint16_t format, const Data &); + static inline int16_t xadvance(uint16_t format, const Data &); + static inline int16_t yadvance(uint16_t format, const Data &); + enum { + F_XPLACEMENT = 0x0001, + F_YPLACEMENT = 0x0002, + F_XADVANCE = 0x0004, + F_YADVANCE = 0x0008, + F_XPLACEMENT_DEVICE = 0x0010, + F_YPLACEMENT_DEVICE = 0x0020, + F_XADVANCE_DEVICE = 0x0040, + F_YADVANCE_DEVICE = 0x0080 + }; + private: + static const int nibble_bitcount_x2[]; +}; + +class GposSingle { public: + GposSingle(const Data &) throw (Error); + // default destructor + Coverage coverage() const throw (); + void unparse(Vector<Positioning> &) const; + enum { F2_HEADERSIZE = 8 }; + private: + Data _d; +}; + +class GposPair { public: + GposPair(const Data &) throw (Error); + // default destructor + Coverage coverage() const throw (); + void unparse(Vector<Positioning> &) const; + enum { F1_HEADERSIZE = 10, F1_RECSIZE = 2, + PAIRSET_HEADERSIZE = 2, PAIRVALUE_HEADERSIZE = 2, + F2_HEADERSIZE = 16 }; + private: + Data _d; +}; + +struct Position { + Glyph g; + int pdx, pdy; // placement + int adx, ady; // advance + inline Position(); + inline Position(Glyph, uint16_t format, const Data &); + inline Position(uint16_t format, const Data &); + inline Position(Glyph, const Position &); + inline Position(Glyph g, int pdx, int pdy, int adx, int ady); + bool empty() const { return pdx == 0 && pdy == 0 && adx == 0 && ady == 0; } + operator bool() const { return !empty(); } + bool h_empty() const { return pdx == 0 && pdy == 0 && adx == 0; } + bool placed() const { return pdx != 0 || pdy != 0; } + void unparse(StringAccum &, const Vector<PermString> * = 0) const; + String unparse(const Vector<PermString> * = 0) const; +}; + +class Positioning { public: + + Positioning(); + + // single positioning + inline Positioning(const Position &); + + // pair positioning + inline Positioning(const Position &, const Position &); + + bool context_in(const Coverage &) const; + bool context_in(const GlyphSet &) const; + + // types + inline operator bool() const; + inline bool is_single() const; + inline bool is_pair() const; + inline bool is_pairkern() const; + + // extract data + const Position &left() const { return _left; } + Glyph left_glyph() const { return _left.g; } + const Position &right() const { return _right; } + Glyph right_glyph() const { return _right.g; } + inline void all_in_glyphs(Vector<Glyph> &gs) const; + + void unparse(StringAccum &, const Vector<PermString> * = 0) const; + String unparse(const Vector<PermString> * = 0) const; + + private: + + Position _left; + Position _right; + +}; + +inline int GposValue::size(uint16_t format) +{ + return (nibble_bitcount_x2[format & 15] + nibble_bitcount_x2[(format>>4) & 15]); +} + +inline int16_t GposValue::xplacement(uint16_t format, const Data &d) +{ + if (format & F_XPLACEMENT) + return d.s16(0); + else + return 0; +} + +inline int16_t GposValue::yplacement(uint16_t format, const Data &d) +{ + if (format & F_YPLACEMENT) + return d.s16((format & F_XPLACEMENT ? 2 : 0)); + else + return 0; +} + +inline int16_t GposValue::xadvance(uint16_t format, const Data &d) +{ + if (format & F_XADVANCE) + return d.s16(nibble_bitcount_x2[format & (F_XADVANCE - 1)]); + else + return 0; +} + +inline int16_t GposValue::yadvance(uint16_t format, const Data &d) +{ + if (format & F_YADVANCE) + return d.s16(nibble_bitcount_x2[format & (F_YADVANCE - 1)]); + else + return 0; +} + +inline Position::Position() + : g(0) +{ +} + +inline Position::Position(Glyph g_, uint16_t format, const Data &value) + : g(g_), + pdx(GposValue::xplacement(format, value)), pdy(GposValue::yplacement(format, value)), + adx(GposValue::xadvance(format, value)), ady(GposValue::yadvance(format, value)) +{ +} + +inline Position::Position(uint16_t format, const Data &value) + : g(0), + pdx(GposValue::xplacement(format, value)), pdy(GposValue::yplacement(format, value)), + adx(GposValue::xadvance(format, value)), ady(GposValue::yadvance(format, value)) +{ +} + +inline Position::Position(Glyph g_, const Position &p) + : g(g_), pdx(p.pdx), pdy(p.pdy), adx(p.adx), ady(p.ady) +{ +} + +inline Position::Position(Glyph g_, int pdx_, int pdy_, int adx_, int ady_) + : g(g_), pdx(pdx_), pdy(pdy_), adx(adx_), ady(ady_) +{ +} + +inline Positioning::Positioning(const Position &left) + : _left(left) +{ +} + +inline Positioning::Positioning(const Position &left, const Position &right) + : _left(left), _right(right) +{ +} + +inline Positioning::operator bool() const +{ + return _left.g != 0; +} + +inline bool Positioning::is_single() const +{ + return _left.g != 0 && _right.g == 0; +} + +inline bool Positioning::is_pair() const +{ + return _left.g != 0 && _right.g != 0; +} + +inline bool Positioning::is_pairkern() const +{ + return _left.g != 0 && !_left.placed() && _right.g != 0 && _right.h_empty(); +} + +inline void Positioning::all_in_glyphs(Vector<Glyph> &gs) const +{ + gs.clear(); + if (_left.g != 0) + gs.push_back(_left.g); + if (_right.g != 0) + gs.push_back(_right.g); +} + +}} +#endif |