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authorPeter Breitenlohner <peb@mppmu.mpg.de>2014-07-31 07:10:42 +0000
committerPeter Breitenlohner <peb@mppmu.mpg.de>2014-07-31 07:10:42 +0000
commit4768b1b377517534111ca75dadc6b9bf4f6a6746 (patch)
tree98ef7890e09b49b3ead45778e78358d49ecefe50 /Build/source/texk/dvisvgm/dvisvgm-1.8/src/Font.h
parentcacd4d369a87819295d5b1759f2b3e8f9eedfab3 (diff)
dvisvgm 1.8
git-svn-id: svn://tug.org/texlive/trunk@34783 c570f23f-e606-0410-a88d-b1316a301751
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+/*************************************************************************
+** 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