1/***************************************************************************/
2/*                                                                         */
3/*  afindic.c                                                              */
4/*                                                                         */
5/*    Auto-fitter hinting routines for Indic writing system (body).        */
6/*                                                                         */
7/*  Copyright 2007-2018 by                                                 */
8/*  Rahul Bhalerao <rahul.bhalerao@redhat.com>, <b.rahul.pm@gmail.com>.    */
9/*                                                                         */
10/*  This file is part of the FreeType project, and may only be used,       */
11/*  modified, and distributed under the terms of the FreeType project      */
12/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
13/*  this file you indicate that you have read the license and              */
14/*  understand and accept it fully.                                        */
15/*                                                                         */
16/***************************************************************************/
17
18
19#include "aftypes.h"
20#include "aflatin.h"
21#include "afcjk.h"
22
23
24#ifdef AF_CONFIG_OPTION_INDIC
25
26#include "afindic.h"
27#include "aferrors.h"
28
29
30#ifdef AF_CONFIG_OPTION_USE_WARPER
31#include "afwarp.h"
32#endif
33
34
35  static FT_Error
36  af_indic_metrics_init( AF_CJKMetrics  metrics,
37                         FT_Face        face )
38  {
39    /* skip blue zone init in CJK routines */
40    FT_CharMap  oldmap = face->charmap;
41
42
43    metrics->units_per_em = face->units_per_EM;
44
45    if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) )
46      face->charmap = NULL;
47    else
48    {
49      af_cjk_metrics_init_widths( metrics, face );
50#if 0
51      /* either need indic specific blue_chars[] or just skip blue zones */
52      af_cjk_metrics_init_blues( metrics, face, af_cjk_blue_chars );
53#endif
54      af_cjk_metrics_check_digits( metrics, face );
55    }
56
57    FT_Set_Charmap( face, oldmap );
58
59    return FT_Err_Ok;
60  }
61
62
63  static void
64  af_indic_metrics_scale( AF_CJKMetrics  metrics,
65                          AF_Scaler      scaler )
66  {
67    /* use CJK routines */
68    af_cjk_metrics_scale( metrics, scaler );
69  }
70
71
72  static FT_Error
73  af_indic_hints_init( AF_GlyphHints  hints,
74                       AF_CJKMetrics  metrics )
75  {
76    /* use CJK routines */
77    return af_cjk_hints_init( hints, metrics );
78  }
79
80
81  static FT_Error
82  af_indic_hints_apply( FT_UInt        glyph_index,
83                        AF_GlyphHints  hints,
84                        FT_Outline*    outline,
85                        AF_CJKMetrics  metrics )
86  {
87    /* use CJK routines */
88    return af_cjk_hints_apply( glyph_index, hints, outline, metrics );
89  }
90
91
92  /* Extract standard_width from writing system/script specific */
93  /* metrics class.                                             */
94
95  static void
96  af_indic_get_standard_widths( AF_CJKMetrics  metrics,
97                                FT_Pos*        stdHW,
98                                FT_Pos*        stdVW )
99  {
100    if ( stdHW )
101      *stdHW = metrics->axis[AF_DIMENSION_VERT].standard_width;
102
103    if ( stdVW )
104      *stdVW = metrics->axis[AF_DIMENSION_HORZ].standard_width;
105  }
106
107
108  /*************************************************************************/
109  /*************************************************************************/
110  /*****                                                               *****/
111  /*****                I N D I C   S C R I P T   C L A S S            *****/
112  /*****                                                               *****/
113  /*************************************************************************/
114  /*************************************************************************/
115
116
117  AF_DEFINE_WRITING_SYSTEM_CLASS(
118    af_indic_writing_system_class,
119
120    AF_WRITING_SYSTEM_INDIC,
121
122    sizeof ( AF_CJKMetricsRec ),
123
124    (AF_WritingSystem_InitMetricsFunc) af_indic_metrics_init,        /* style_metrics_init    */
125    (AF_WritingSystem_ScaleMetricsFunc)af_indic_metrics_scale,       /* style_metrics_scale   */
126    (AF_WritingSystem_DoneMetricsFunc) NULL,                         /* style_metrics_done    */
127    (AF_WritingSystem_GetStdWidthsFunc)af_indic_get_standard_widths, /* style_metrics_getstdw */
128
129    (AF_WritingSystem_InitHintsFunc)   af_indic_hints_init,          /* style_hints_init      */
130    (AF_WritingSystem_ApplyHintsFunc)  af_indic_hints_apply          /* style_hints_apply     */
131  )
132
133
134#else /* !AF_CONFIG_OPTION_INDIC */
135
136
137  AF_DEFINE_WRITING_SYSTEM_CLASS(
138    af_indic_writing_system_class,
139
140    AF_WRITING_SYSTEM_INDIC,
141
142    sizeof ( AF_CJKMetricsRec ),
143
144    (AF_WritingSystem_InitMetricsFunc) NULL, /* style_metrics_init    */
145    (AF_WritingSystem_ScaleMetricsFunc)NULL, /* style_metrics_scale   */
146    (AF_WritingSystem_DoneMetricsFunc) NULL, /* style_metrics_done    */
147    (AF_WritingSystem_GetStdWidthsFunc)NULL, /* style_metrics_getstdw */
148
149    (AF_WritingSystem_InitHintsFunc)   NULL, /* style_hints_init      */
150    (AF_WritingSystem_ApplyHintsFunc)  NULL  /* style_hints_apply     */
151  )
152
153
154#endif /* !AF_CONFIG_OPTION_INDIC */
155
156
157/* END */
158