lib/taglobal.h

   1 /* taglobal.h */
   2
   3 /*
   4  * Copyright (C) 2011-2014 by Werner Lemberg.
   5  *
   6  * This file is part of the ttfautohint library, and may only be used,
   7  * modified, and distributed under the terms given in `COPYING'.  By
   8  * continuing to use, modify, or distribute this file you indicate that you
   9  * have read `COPYING' and understand and accept it fully.
  10  *
  11  * The file `COPYING' mentioned in the previous paragraph is distributed
  12  * with the ttfautohint library.
  13  */
  14
  15
  16 /* originally file `afglobal.h' (2011-Mar-28) from FreeType */
  17
  18 /* heavily modified 2011 by Werner Lemberg <wl@gnu.org> */
  19
  20 #ifndef __TAGLOBAL_H__
  21 #define __TAGLOBAL_H__
  22
  23 #include "ta.h"
  24 #include "tatypes.h"
  25 #include "taharfbuzz.h"
  26
  27
  28 extern TA_WritingSystemClass const ta_writing_system_classes[];
  29
  30
  31 #undef SCRIPT
  32 #define SCRIPT(s, S, d, h, sc1, sc2, sc3) \
  33           extern const TA_ScriptClassRec ta_ ## s ## _script_class;
  34
  35 #include "ttfautohint-scripts.h"
  36
  37 extern TA_ScriptClass const ta_script_classes[];
  38
  39
  40 #undef STYLE
  41 #define STYLE(s, S, d, ws, sc, ss, c) \
  42           extern const TA_StyleClassRec ta_ ## s ## _style_class;
  43
  44 #include "tastyles.h"
  45
  46 extern TA_StyleClass const ta_style_classes[];
  47
  48
  49 #ifdef TA_DEBUG
  50 extern const char* ta_style_names[];
  51 #endif
  52
  53
  54 /* Default values and flags for both autofitter globals */
  55 /* (originally found in AF_ModuleRec, we use FONT instead) */
  56 /* and face globals (in TA_FaceGlobalsRec). */
  57
  58 /* index of fallback style in `ta_style_classes' */
  59 #define TA_STYLE_FALLBACK TA_STYLE_NONE_DFLT
  60 /* default script for OpenType */
  61 #define TA_SCRIPT_DEFAULT  AF_SCRIPT_LATN
  62 /* a bit mask indicating an uncovered glyph */
  63 #define TA_STYLE_UNASSIGNED 0x7F
  64 /* if this flag is set, we have an ASCII digit */
  65 #define TA_DIGIT 0x80
  66
  67 /* `increase-x-height' property */
  68 #define TA_PROP_INCREASE_X_HEIGHT_MIN 6
  69 #define TA_PROP_INCREASE_X_HEIGHT_MAX 0
  70
  71
  72 /* note that glyph_styles[] maps each glyph to an index into the */
  73 /* `ta_style_classes' array. */
  74 typedef struct TA_FaceGlobalsRec_
  75 {
  76   FT_Face face;
  77   FT_Long glyph_count; /* same as face->num_glyphs */
  78   FT_Byte* glyph_styles;
  79
  80   hb_font_t* hb_font;
  81
  82   /* per-face auto-hinter properties */
  83   FT_UInt increase_x_height;
  84
  85   TA_StyleMetrics metrics[TA_STYLE_MAX];
  86
  87   FONT* font; /* to access global properties */
  88 } TA_FaceGlobalsRec;
  89
  90
  91 /* this models the global hints data for a given face, */
  92 /* decomposed into style-specific items */
  93
  94 FT_Error
  95 ta_face_globals_new(FT_Face face,
  96                     TA_FaceGlobals *aglobals,
  97                     FONT* font);
  98
  99 FT_Error
 100 ta_face_globals_get_metrics(TA_FaceGlobals globals,
 101                             FT_UInt gindex,
 102                             FT_UInt options,
 103                             TA_StyleMetrics *ametrics);
 104
 105 void
 106 ta_face_globals_free(TA_FaceGlobals globals);
 107
 108 FT_Bool
 109 ta_face_globals_is_digit(TA_FaceGlobals globals,
 110                          FT_UInt gindex);
 111
 112 #endif /* __TAGLOBAL_H__ */
 113
 114 /* end of taglobal.h */