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