lib/ttf.h

   1 /* ttf.h
   2    Parser and writer for truetype font files.
   3
   4    Part of the swftools package.
   5
   6    Copyright (c) 2010 Matthias Kramm <kramm@quiss.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21
  22 #ifndef __ttf_h__
  23 #define __ttf_h__
  24
  25 #include "types.h"
  26
  27 typedef struct _ttf_table {
  28     U32 id;
  29     struct _ttf_table*prev;
  30     struct _ttf_table*next;
  31
  32     U8*data;
  33     int len;
  34     int memsize;
  35 } ttf_table_t;
  36
  37 typedef struct _table_maxp {
  38     U16 maxPoints;
  39     U16 maxContours;
  40     U16 maxComponentPoints;
  41     U16 maxComponentContours;
  42     U16 maxZones;
  43     U16 maxTwilightPoints;
  44     U16 maxStorage;
  45     U16 maxFunctionDefs;
  46     U16 maxInstructionDefs;
  47     U16 maxStackElements;
  48     U16 maxSizeOfInstructions;
  49     U16 maxComponentElements;
  50     U16 maxComponentDepth;
  51 } table_maxp_t;
  52
  53 typedef struct _table_os2 {
  54     S16 xAvgCharWidth;
  55     U16 usWeightClass;
  56     U16 usWidthClass;
  57     U16 ySubscriptXSize;
  58     U16 ySubscriptYSize;
  59     U16 ySubscriptXOffset;
  60     U16 ySubscriptYOffset;
  61     U16 ySuperscriptXSize;
  62     U16 ySuperscriptYSize;
  63     U16 ySuperscriptXOffset;
  64     U16 ySuperscriptYOffset;
  65     U16 yStrikeoutSize;
  66     U16 yStrikeoutPosition;
  67     U16 sFamilyClass;
  68     U8 panose_FamilyType;
  69     U8 panose_SerifStyle;
  70     U8 panose_Weight;
  71     U8 panose_Proportion;
  72     U8 panose_Contrast;
  73     U8 panose_StrokeVariation;
  74     U8 panose_ArmStyle;
  75     U8 panose_Letterform;
  76     U8 panose_Midline;
  77     U8 panose_XHeight;
  78     U32 ulCharRange[4];
  79
  80     U16 fsSelection;
  81     U16 fsFirstCharIndex;
  82     U16 fsLastCharIndex;
  83
  84     S16 sTypoAscender;
  85     S16 sTypoDescender;
  86     S16 sTypoLineGap;
  87     U16 usWinAscent;
  88     U16 usWinDescent;
  89
  90     /* for version >= 0x0001 */
  91     U32 ulCodePageRange1;
  92     U32 ulCodePageRange2;
  93
  94     /* for version >= 0x0002 */
  95     S16 sxHeight;
  96     S16 sCapHeight;
  97     U16 usDefaultChar;
  98     U16 usBreakChar;
  99     U16 usMaxContext;
 100 } table_os2_t;
 101
 102 typedef struct _table_hea
 103 {
 104     U16 advanceWidthMax;
 105     S16 minLeftSideBearing;
 106     S16 minRightSideBearing;
 107     S16 xMaxExtent;
 108     S16 caretSlopeRise;
 109     S16 caretSlopeRun;
 110     S16 caretOffset;
 111 } table_hea_t;
 112
 113 #define GLYPH_ON_CURVE 0x01
 114 #define GLYPH_CONTOUR_START 0x40
 115 #define GLYPH_CONTOUR_END 0x80
 116
 117 typedef U32 unicode_t;
 118
 119 typedef struct _ttfpoint {
 120     int x,y;
 121     U8 flags;
 122 } ttfpoint_t;
 123 typedef struct _ttfglyph {
 124     U16 advance;
 125     S16 bearing;
 126     S16 xmin,ymin,xmax,ymax;
 127     int code_size;
 128     U8*code;
 129     int num_points;
 130     ttfpoint_t*points;
 131 } ttfglyph_t;
 132
 133 typedef struct _table_head {
 134     U16 flags;
 135     U16 units_per_em;
 136     S16 xmin,ymin,xmax,ymax;
 137     U16 macStyle;
 138     U16 lowest_readable_size;
 139     S16 dir_hint;
 140 } table_head_t;
 141
 142 typedef struct _table_post {
 143     U32 italic_angle;
 144     U16 underline_position;
 145     U16 underline_thickness;
 146 } table_post_t;
 147
 148 typedef struct _table_cvt {
 149     S16*values;
 150     int num;
 151 } table_cvt_t;
 152
 153 typedef struct _table_gasp {
 154     int num;
 155     struct {
 156         U16 size;
 157         U16 behaviour;
 158     } *records;
 159 } table_gasp_t;
 160
 161 typedef struct _table_code {
 162     U8*code;
 163     int size;
 164 } table_code_t;
 165
 166 typedef struct _ttf {
 167     char*family_name;     /* nameId 1 */
 168     char*subfamily_name;  /* nameId 2 */
 169     char*font_uid;        /* nameId 3 */
 170     char*full_name;       /* nameId 4 */
 171     char*version_string;  /* nameId 5 */
 172     char*postscript_name; /* nameId 6 */
 173
 174     ttf_table_t*tables;
 175
 176     table_head_t*head;
 177     table_maxp_t*maxp;
 178     table_os2_t*os2;
 179     table_hea_t*hea;
 180     table_post_t*post;
 181     table_cvt_t*cvt;
 182     table_gasp_t*gasp;
 183     table_code_t*prep;
 184     table_code_t*fpgm;
 185
 186     U16 flags;
 187     char is_vertical;
 188
 189     S16 ascent;
 190     S16 descent; // ymin, *not* negative ymin
 191     S16 lineGap;
 192
 193     int num_glyphs;
 194     ttfglyph_t*glyphs;
 195
 196     int unicode_size;
 197     unicode_t*unicode;
 198
 199     U32 version;
 200 } ttf_t;
 201
 202
 203 ttf_t*ttf_new();
 204 ttf_t* ttf_open(const char*filename);
 205 void ttf_reduce(ttf_t*ttf);
 206 ttf_t*ttf_load(void*data, int length);
 207 ttf_table_t*ttf_addtable(ttf_t*ttf, U32 tag);
 208 void ttf_create_truetype_tables(ttf_t*ttf);
 209 void ttf_dump(ttf_t*ttf);
 210 void ttf_destroy(ttf_t*ttf);
 211 void ttf_save(ttf_t*ttf, const char*filename);
 212 void ttf_save_eot(ttf_t*ttf, const char*filename);
 213
 214 #endif