aboutsummaryrefslogtreecommitdiff
path: root/freetype/src/autofit/afglobal.h
blob: 38d8d695285185a969c7c8e9c95d0883163bb9fc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/***************************************************************************/
/*                                                                         */
/*  afglobal.h                                                             */
/*                                                                         */
/*    Auto-fitter routines to compute global hinting values                */
/*    (specification).                                                     */
/*                                                                         */
/*  Copyright 2003-2005, 2007, 2009, 2011-2014 by                          */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#ifndef __AFGLOBAL_H__
#define __AFGLOBAL_H__


#include "aftypes.h"
#include "afmodule.h"
#include "hbshim.h"


FT_BEGIN_HEADER


  FT_LOCAL_ARRAY( AF_WritingSystemClass )
  af_writing_system_classes[];


#undef  SCRIPT
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 )                    \
          AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )

#include "afscript.h"

  FT_LOCAL_ARRAY( AF_ScriptClass )
  af_script_classes[];


#undef  STYLE
#define STYLE( s, S, d, ws, sc, ss, c )                      \
          AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )

#include "afstyles.h"

  FT_LOCAL_ARRAY( AF_StyleClass )
  af_style_classes[];


#ifdef FT_DEBUG_LEVEL_TRACE
  FT_LOCAL_ARRAY( char* )
  af_style_names[];
#endif


  /*
   *  Default values and flags for both autofitter globals (found in
   *  AF_ModuleRec) and face globals (in AF_FaceGlobalsRec).
   */

  /* index of fallback style in `af_style_classes' */
#ifdef AF_CONFIG_OPTION_CJK
#define AF_STYLE_FALLBACK    AF_STYLE_HANI_DFLT
#else
#define AF_STYLE_FALLBACK    AF_STYLE_NONE_DFLT
#endif
  /* default script for OpenType; ignored if HarfBuzz isn't used */
#define AF_SCRIPT_DEFAULT    AF_SCRIPT_LATN
  /* a bit mask indicating an uncovered glyph        */
#define AF_STYLE_UNASSIGNED  0x7F
  /* if this flag is set, we have an ASCII digit     */
#define AF_DIGIT             0x80

  /* `increase-x-height' property */
#define AF_PROP_INCREASE_X_HEIGHT_MIN  6
#define AF_PROP_INCREASE_X_HEIGHT_MAX  0


  /************************************************************************/
  /************************************************************************/
  /*****                                                              *****/
  /*****                  F A C E   G L O B A L S                     *****/
  /*****                                                              *****/
  /************************************************************************/
  /************************************************************************/


  /*
   *  Note that glyph_styles[] maps each glyph to an index into the
   *  `af_style_classes' array.
   *
   */
  typedef struct  AF_FaceGlobalsRec_
  {
    FT_Face          face;
    FT_Long          glyph_count;    /* same as face->num_glyphs */
    FT_Byte*         glyph_styles;

#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
    hb_font_t*       hb_font;
#endif

    /* per-face auto-hinter properties */
    FT_UInt          increase_x_height;

    AF_StyleMetrics  metrics[AF_STYLE_MAX];

    AF_Module        module;         /* to access global properties */

  } AF_FaceGlobalsRec;


  /*
   *  model the global hints data for a given face, decomposed into
   *  style-specific items
   */

  FT_LOCAL( FT_Error )
  af_face_globals_new( FT_Face          face,
                       AF_FaceGlobals  *aglobals,
                       AF_Module        module );

  FT_LOCAL( FT_Error )
  af_face_globals_get_metrics( AF_FaceGlobals    globals,
                               FT_UInt           gindex,
                               FT_UInt           options,
                               AF_StyleMetrics  *ametrics );

  FT_LOCAL( void )
  af_face_globals_free( AF_FaceGlobals  globals );

  FT_LOCAL_DEF( FT_Bool )
  af_face_globals_is_digit( AF_FaceGlobals  globals,
                            FT_UInt         gindex );

  /* */


FT_END_HEADER

#endif /* __AFGLOBAL_H__ */


/* END */