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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.7/src/Font.h')
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diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.7/src/Font.h b/Build/source/texk/dvisvgm/dvisvgm-1.7/src/Font.h new file mode 100644 index 00000000000..beba335793a --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.7/src/Font.h @@ -0,0 +1,389 @@ +/************************************************************************* +** Font.h ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2014 Martin Gieseking <martin.gieseking@uos.de> ** +** ** +** This program is free software; you can redistribute it and/or ** +** modify it under the terms of the GNU General Public License as ** +** published by the Free Software Foundation; either version 3 of ** +** the License, or (at your option) any later version. ** +** ** +** This program is distributed in the hope that it will be useful, but ** +** WITHOUT ANY WARRANTY; without even the implied warranty of ** +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** +** GNU General Public License for more details. ** +** ** +** You should have received a copy of the GNU General Public License ** +** along with this program; if not, see <http://www.gnu.org/licenses/>. ** +*************************************************************************/ + +#ifndef DVISVGM_FONT_H +#define DVISVGM_FONT_H + +#include <map> +#include <string> +#include <vector> +#include "Character.h" +#include "CharMapID.h" +#include "Color.h" +#include "FontCache.h" +#include "FontEncoding.h" +#include "FontMap.h" +#include "FontMetrics.h" +#include "GFGlyphTracer.h" +#include "Glyph.h" +#include "GraphicPath.h" +#include "MessageException.h" +#include "RangeMap.h" +#include "ToUnicodeMap.h" +#include "VFActions.h" +#include "VFReader.h" +#include "types.h" + + +struct FontStyle; + + +struct GlyphMetrics +{ + GlyphMetrics () : wl(0), wr(0), h(0), d(0) {} + GlyphMetrics (double wwl, double wwr, double hh, double dd) : wl(wwl), wr(wwr), h(hh), d(dd) {} + double wl, wr, h, d; +}; + + +/** Abstract base for all font classes. */ +struct Font { + virtual ~Font () {} + virtual Font* clone (double ds, double sc) const =0; + virtual const Font* uniqueFont () const =0; + virtual std::string name () const =0; + virtual double designSize () const =0; + virtual double scaledSize () const =0; + virtual double scaleFactor () const {return scaledSize()/designSize();} + virtual double charWidth (int c) const =0; + virtual double charDepth (int c) const =0; + virtual double charHeight (int c) const =0; + virtual double italicCorr (int c) const =0; + virtual const FontMetrics* getMetrics () const =0; + virtual const char* path () const =0; + virtual const char* filename () const; + virtual const FontEncoding* encoding () const; + virtual bool getGlyph (int c, Glyph &glyph, GFGlyphTracer::Callback *cb=0) const =0; + virtual void getGlyphMetrics (int c, bool vertical, GlyphMetrics &metrics) const; + virtual UInt32 unicode (UInt32 c) const; + virtual void tidy () const {} + virtual bool findAndAssignBaseFontMap () {return true;} + virtual bool verticalLayout () const {return getMetrics() ? getMetrics()->verticalLayout() : false;} + virtual bool verifyChecksums () const {return true;} + virtual int fontIndex () const {return 0;} + virtual const FontStyle* style () const {return 0;} + virtual Color color () const {return Color::BLACK;} + virtual const FontMap::Entry* fontMapEntry () const; +}; + + +/** Empty font without any glyphs. Instances of this class are used + * if no physical or virtual font file can be found. + * The metric values returned by the member functions are based on cmr10. */ +struct EmptyFont : public Font +{ + public: + EmptyFont (std::string name) : _fontname(name) {} + Font* clone (double ds, double sc) const {return new EmptyFont(*this);} + const Font* uniqueFont () const {return this;} + std::string name () const {return _fontname;} + double designSize () const {return 10;} // cmr10 design size in pt + double scaledSize () const {return 10;} // cmr10 scaled size in pt + double charWidth (int c) const {return 9.164;} // width of cmr10's 'M' in pt + double charHeight (int c) const {return 6.833;} // height of cmr10's 'M' in pt + double charDepth (int c) const {return 0;} + double italicCorr (int c) const {return 0;} + const FontMetrics* getMetrics () const {return 0;} + const char* path () const {return 0;} + bool getGlyph (int c, Glyph &glyph, GFGlyphTracer::Callback *cb=0) const {return false;} + + private: + std::string _fontname; +}; + + +/** Interface for all physical fonts. */ +class PhysicalFont : public virtual Font +{ + public: + enum Type {MF, OTF, PFB, TTC, TTF, UNKNOWN}; + + static Font* create (std::string name, UInt32 checksum, double dsize, double ssize, PhysicalFont::Type type); + static Font* create (std::string name, int fontindex, UInt32 checksum, double dsize, double ssize); + virtual Type type () const =0; + virtual bool getGlyph (int c, Glyph &glyph, GFGlyphTracer::Callback *cb=0) const; + virtual bool getExactGlyphBox (int c, BoundingBox &bbox, GFGlyphTracer::Callback *cb=0) const; + virtual bool getExactGlyphBox (int c, GlyphMetrics &metrics, bool vertical, GFGlyphTracer::Callback *cb=0) const; + virtual bool isCIDFont () const; + virtual int hAdvance () const; + virtual double hAdvance (int c) const; + virtual double vAdvance (int c) const; + std::string glyphName (int c) const; + virtual int unitsPerEm () const; + virtual double scaledAscent () const; + virtual int ascent () const; + virtual int descent () const; + virtual int traceAllGlyphs (bool includeCached, GFGlyphTracer::Callback *cb=0) const; + virtual int collectCharMapIDs (std::vector<CharMapID> &charmapIDs) const; + virtual CharMapID getCharMapID () const =0; + virtual void setCharMapID (const CharMapID &id) {} + virtual Character decodeChar (UInt32 c) const; + const char* path () const; + + protected: + bool createGF (std::string &gfname) const; + + public: + static bool EXACT_BBOX; + static bool KEEP_TEMP_FILES; + static const char *CACHE_PATH; ///< path to cache directory (0 if caching is disabled) + static double METAFONT_MAG; ///< magnification factor for Metafont calls + + protected: + static FontCache _cache; +}; + + +/** Interface for all virtual fonts. */ +class VirtualFont : public virtual Font +{ + friend class FontManager; + public: + typedef std::vector<UInt8> DVIVector; + + public: + static Font* create (std::string name, UInt32 checksum, double dsize, double ssize); + virtual const DVIVector* getDVI (int c) const =0; + bool getGlyph (int c, Glyph &glyph, GFGlyphTracer::Callback *cb=0) const {return false;} + + protected: + virtual void assignChar (UInt32 c, DVIVector *dvi) =0; +}; + + +class TFMFont : public virtual Font +{ + public: + TFMFont (std::string name, UInt32 checksum, double dsize, double ssize); + ~TFMFont (); + const FontMetrics* getMetrics () const; + std::string name () const {return _fontname;} + double designSize () const {return _dsize;} + double scaledSize () const {return _ssize;} + double charWidth (int c) const; + double charDepth (int c) const; + double charHeight (int c) const; + double italicCorr (int c) const; + bool verifyChecksums () const; + + private: + mutable FontMetrics *_metrics; + std::string _fontname; + UInt32 _checksum; ///< cheksum to be compared with TFM checksum + double _dsize; ///< design size in PS point units + double _ssize; ///< scaled size in PS point units +}; + + +class PhysicalFontProxy : public PhysicalFont +{ + friend class PhysicalFontImpl; + public: + Font* clone (double ds, double sc) const {return new PhysicalFontProxy(*this, ds, sc);} + const Font* uniqueFont () const {return _pf;} + std::string name () const {return _pf->name();} + double designSize () const {return _dsize;} + double scaledSize () const {return _ssize;} + double charWidth (int c) const {return _pf->charWidth(c);} + double charDepth (int c) const {return _pf->charDepth(c);} + double charHeight (int c) const {return _pf->charHeight(c);} + double italicCorr (int c) const {return _pf->italicCorr(c);} + const FontMetrics* getMetrics () const {return _pf->getMetrics();} + Type type () const {return _pf->type();} + UInt32 unicode (UInt32 c) const {return _pf->unicode(c);} + int fontIndex () const {return _pf->fontIndex();} + const FontStyle* style () const {return _pf->style();} + const FontMap::Entry* fontMapEntry () const {return _pf->fontMapEntry();} + const FontEncoding* encoding () const {return _pf->encoding();} + CharMapID getCharMapID () const {return _pf->getCharMapID();} + int collectCharMapIDs (std::vector<CharMapID> &charmapIDs) const {return _pf->collectCharMapIDs(charmapIDs);} + + protected: + PhysicalFontProxy (const PhysicalFont *font, double ds, double ss) : _pf(font), _dsize(ds), _ssize(ss) {} + PhysicalFontProxy (const PhysicalFontProxy &proxy, double ds, double ss) : _pf(proxy._pf), _dsize(ds), _ssize(ss) {} + + private: + const PhysicalFont *_pf; + double _dsize; ///< design size in PS point units + double _ssize; ///< scaled size in PS point units +}; + + +class PhysicalFontImpl : public PhysicalFont, public TFMFont +{ + friend class PhysicalFont; + public: + ~PhysicalFontImpl(); + Font* clone (double ds, double ss) const {return new PhysicalFontProxy(this, ds, ss);} + const Font* uniqueFont () const {return this;} + Type type () const {return _filetype;} + int fontIndex() const {return _fontIndex;} + const FontStyle* style () const {return _fontMapEntry ? &_fontMapEntry->style : 0;} + const FontMap::Entry* fontMapEntry () const {return _fontMapEntry;} + const FontEncoding* encoding () const; + UInt32 unicode (UInt32 c) const; + bool findAndAssignBaseFontMap (); + void tidy () const; + CharMapID getCharMapID () const {return _charmapID;} + + protected: + PhysicalFontImpl (std::string name, int fontindex, UInt32 checksum, double dsize, double ssize, PhysicalFont::Type type); + + private: + Type _filetype; + int _fontIndex; + const FontMap::Entry *_fontMapEntry; + FontEncodingPair _encodingPair; + CharMapID _charmapID; ///< ID of the font's charmap to use + const RangeMap *_localCharMap; +}; + + +class NativeFont : public PhysicalFont +{ + public: + virtual NativeFont* clone (double ptsize, const FontStyle &style, Color color) const =0; + virtual Font* clone (double ds, double sc) const =0; + std::string name () const; + Type type () const; + double designSize () const {return _ptsize;} + double scaledSize () const {return _ptsize;} + double charWidth (int c) const; + double charDepth (int c) const; + double charHeight (int c) const; + double italicCorr (int c) const {return 0;} + const FontMetrics* getMetrics () const {return 0;} + const FontStyle* style () const {return &_style;} + Color color () const {return _color;} + const FontMap::Entry* fontMapEntry () const {return 0;} + static std::string uniqueName (const std::string &path, const FontStyle &style); + + protected: + NativeFont (double ptsize, const FontStyle &style, Color color) : _ptsize(ptsize), _style(style), _color(color) {} + + private: + double _ptsize; ///< font size in PS point units + FontStyle _style; + Color _color; +}; + + +class NativeFontProxy : public NativeFont +{ + friend class NativeFontImpl; + public: + NativeFont* clone (double ptsize, const FontStyle &style, Color color) const { + return new NativeFontProxy(this, ptsize, style, color); + } + + Font* clone (double ds, double sc) const {return new NativeFontProxy(this , sc, *style(), color());} + const Font* uniqueFont () const {return _nfont;} + const char* path () const {return _nfont->path();} + Character decodeChar (UInt32 c) const {return _nfont->decodeChar(c);} + UInt32 unicode (UInt32 c) const {return _nfont->unicode(c);} + CharMapID getCharMapID () const {return _nfont->getCharMapID();} + + protected: + NativeFontProxy (const NativeFont *nfont, double ptsize, const FontStyle &style, Color color) + : NativeFont(ptsize, style, color), _nfont(nfont) {} + + private: + const NativeFont *_nfont; +}; + + +class NativeFontImpl : public NativeFont +{ + public: + NativeFontImpl (const std::string &fname, double ptsize, const FontStyle &style, Color color) + : NativeFont(ptsize, style, color), _path(fname) {} + + NativeFont* clone (double ptsize, const FontStyle &style, Color color) const { + return new NativeFontProxy(this, ptsize, style, color); + } + + Font* clone (double ds, double sc) const {return new NativeFontProxy(this , sc, *style(), color());} + const Font* uniqueFont () const {return this;} + const char* path () const {return _path.c_str();} + bool findAndAssignBaseFontMap (); + CharMapID getCharMapID () const {return CharMapID::NONE;} + Character decodeChar (UInt32 c) const; + UInt32 unicode (UInt32 c) const; + + private: + std::string _path; + ToUnicodeMap _toUnicodeMap; ///< maps from char indexes to unicode points +}; + + +class VirtualFontProxy : public VirtualFont +{ + friend class VirtualFontImpl; + public: + Font* clone (double ds, double ss) const {return new VirtualFontProxy(*this, ds, ss);} + const Font* uniqueFont () const {return _vf;} + std::string name () const {return _vf->name();} + const DVIVector* getDVI (int c) const {return _vf->getDVI(c);} + double designSize () const {return _dsize;} + double scaledSize () const {return _ssize;} + double charWidth (int c) const {return _vf->charWidth(c);} + double charDepth (int c) const {return _vf->charDepth(c);} + double charHeight (int c) const {return _vf->charHeight(c);} + double italicCorr (int c) const {return _vf->italicCorr(c);} + const FontMetrics* getMetrics () const {return _vf->getMetrics();} + const char* path () const {return _vf->path();} + + protected: + VirtualFontProxy (const VirtualFont *font, double ds, double ss) : _vf(font), _dsize(ds), _ssize(ss) {} + VirtualFontProxy (const VirtualFontProxy &proxy, double ds, double ss) : _vf(proxy._vf), _dsize(ds), _ssize(ss) {} + void assignChar (UInt32 c, DVIVector *dvi) {delete dvi;} + + private: + const VirtualFont *_vf; + double _dsize; ///< design size in PS point units + double _ssize; ///< scaled size in PS point units +}; + + +class VirtualFontImpl : public VirtualFont, public TFMFont +{ + friend class VirtualFont; + public: + ~VirtualFontImpl (); + Font* clone (double ds, double ss) const {return new VirtualFontProxy(this, ds, ss);} + const Font* uniqueFont () const {return this;} + const DVIVector* getDVI (int c) const; + const char* path () const; + + protected: + VirtualFontImpl (std::string name, UInt32 checksum, double dsize, double ssize); + void assignChar (UInt32 c, DVIVector *dvi); + + private: + std::map<UInt32, DVIVector*> _charDefs; ///< dvi subroutines defining the characters +}; + + +struct FontException : public MessageException +{ + FontException (std::string msg) : MessageException(msg) {} +}; + +#endif |