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127 lines
4.4 KiB
127 lines
4.4 KiB
// -*- C++ -*-
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/*
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* The layout of a font information block.
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* There is one of these for every loaded font or magnification thereof.
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* Duplicates are eliminated: this is necessary because of possible recursion
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* in virtual fonts.
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*
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* Also note the strange units. The design size is in 1/2^20 point
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* units (also called micro-points), and the individual character widths
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* are in the TFM file in 1/2^20 ems units, i.e., relative to the design size.
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*
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* We then change the sizes to SPELL units (unshrunk pixel / 2^16).
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*/
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#ifndef _FONT_H
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#define _FONT_H
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#include <tqintdict.h>
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#include <tqstring.h>
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#include <stdio.h>
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class dviRenderer;
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class TeXFont;
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typedef void (dviRenderer::*set_char_proc)(unsigned int, unsigned int);
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// Per character information for virtual fonts
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class macro {
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public:
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macro();
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~macro();
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unsigned char *pos; /* address of first byte of macro */
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unsigned char *end; /* address of last+1 byte */
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TQ_INT32 dvi_advance_in_units_of_design_size_by_2e20; /* DVI units to move reference point */
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bool free_me; // if memory at pos should be returned on destruction
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};
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class TeXFontDefinition {
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public:
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// Currently, kdvi supports fonts with at most 256 characters to
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// comply with "The DVI Driver Standard, Level 0". If you change
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// this value here, make sure to go through all the source and
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// ensure that character numbers are stored in ints rather than
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// unsigned chars.
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static const unsigned int max_num_of_chars_in_font = 256;
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enum font_flags {
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FONT_IN_USE = 1, // used for housekeeping
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FONT_LOADED = 2, // if font file has been read
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FONT_VIRTUAL = 4, // if font is virtual
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FONT_KPSE_NAME = 8 // if kpathsea has already tried to find the font name
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};
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TeXFontDefinition(TQString nfontname, double _displayResolution_in_dpi, TQ_UINT32 chk, TQ_INT32 _scaled_size_in_DVI_units,
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class fontPool *pool, double _enlargement);
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~TeXFontDefinition();
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void reset();
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void fontNameReceiver(const TQString&);
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// Members for character fonts
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void setDisplayResolution(double _displayResolution_in_dpi);
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bool isLocated() const {return ((flags & FONT_KPSE_NAME) != 0);}
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void markAsLocated() {flags |= FONT_KPSE_NAME;}
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void mark_as_used();
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class fontPool *font_pool; // Pointer to the pool that contains this font.
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TQString fontname; // name of font, such as "cmr10"
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unsigned char flags; // flags byte (see values below)
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double enlargement;
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TQ_INT32 scaled_size_in_DVI_units; // Scaled size from the font definition command; in DVI units
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set_char_proc set_char_p; // proc used to set char
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// Resolution of the display device (resolution will usually be
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// scaled, according to the zoom)
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double displayResolution_in_dpi;
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FILE *file; // open font file or NULL
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TQString filename; // name of font file
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TeXFont *font;
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macro *macrotable; // used by (loaded) virtual fonts
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TQIntDict<TeXFontDefinition> vf_table; // used by (loaded) virtual fonts, list of fonts used by this vf,
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// acessible by number
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TeXFontDefinition *first_font; // used by (loaded) virtual fonts, list of fonts used by this vf
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#ifdef HAVE_FREETYPE
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const TQString &getFullFontName() const {return fullFontName;}
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const TQString &getFullEncodingName() const {return fullEncodingName;}
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#endif
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const TQString &getFontTypeName() const {return fontTypeName;}
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#ifdef HAVE_FREETYPE
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/** For FREETYPE fonts, which use a map file, this field will
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contain the full name of the font (e.g. 'Computer Modern'). If
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the name does not exist, or cannot be found, this field will be
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TQString(). Only subclasses of TeXFont should write into this
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field. */
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TQString fullFontName;
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/** For FREETYPE fonts, which use a map file, this field will
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contain the full name of the font encoding (e.g. 'TexBase1'). If
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the encoding name does not exist, or cannot be found, this field
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will be TQString(). Only subclasses of TeXFont should write
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into this field. */
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TQString fullEncodingName;
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#endif
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private:
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TQ_UINT32 checksum;
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/** This will be set to a human-readable description of the font,
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e.g. "virtual" or "TeX PK", or "Type 1" */
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TQString fontTypeName;
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// Functions related to virtual fonts
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void read_VF_index(void );
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};
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#endif
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