1 /***************************************************************************/
2 /*                                                                         */
3 /*  afindic.c                                                              */
4 /*                                                                         */
5 /*    Auto-fitter hinting routines for Indic writing system (body).        */
6 /*                                                                         */
7 /*  Copyright 2007-2015 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 
22 
23 #ifdef AF_CONFIG_OPTION_INDIC
24 
25 #include "afindic.h"
26 #include "aferrors.h"
27 #include "afcjk.h"
28 
29 
30 #ifdef AF_CONFIG_OPTION_USE_WARPER
31 #include "afwarp.h"
32 #endif
33 
34 
35   static FT_Error
af_indic_metrics_init(AF_CJKMetrics metrics,FT_Face face)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
af_indic_metrics_scale(AF_CJKMetrics metrics,AF_Scaler scaler)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
af_indic_hints_init(AF_GlyphHints hints,AF_CJKMetrics metrics)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
af_indic_hints_apply(AF_GlyphHints hints,FT_Outline * outline,AF_CJKMetrics metrics)82   af_indic_hints_apply( AF_GlyphHints  hints,
83                         FT_Outline*    outline,
84                         AF_CJKMetrics  metrics )
85   {
86     /* use CJK routines */
87     return af_cjk_hints_apply( hints, outline, metrics );
88   }
89 
90 
91   /*************************************************************************/
92   /*************************************************************************/
93   /*****                                                               *****/
94   /*****                I N D I C   S C R I P T   C L A S S            *****/
95   /*****                                                               *****/
96   /*************************************************************************/
97   /*************************************************************************/
98 
99 
100   AF_DEFINE_WRITING_SYSTEM_CLASS(
101     af_indic_writing_system_class,
102 
103     AF_WRITING_SYSTEM_INDIC,
104 
105     sizeof ( AF_CJKMetricsRec ),
106 
107     (AF_WritingSystem_InitMetricsFunc) af_indic_metrics_init,
108     (AF_WritingSystem_ScaleMetricsFunc)af_indic_metrics_scale,
109     (AF_WritingSystem_DoneMetricsFunc) NULL,
110 
111     (AF_WritingSystem_InitHintsFunc)   af_indic_hints_init,
112     (AF_WritingSystem_ApplyHintsFunc)  af_indic_hints_apply
113   )
114 
115 
116 #else /* !AF_CONFIG_OPTION_INDIC */
117 
118 
119   AF_DEFINE_WRITING_SYSTEM_CLASS(
120     af_indic_writing_system_class,
121 
122     AF_WRITING_SYSTEM_INDIC,
123 
124     sizeof ( AF_CJKMetricsRec ),
125 
126     (AF_WritingSystem_InitMetricsFunc) NULL,
127     (AF_WritingSystem_ScaleMetricsFunc)NULL,
128     (AF_WritingSystem_DoneMetricsFunc) NULL,
129 
130     (AF_WritingSystem_InitHintsFunc)   NULL,
131     (AF_WritingSystem_ApplyHintsFunc)  NULL
132   )
133 
134 
135 #endif /* !AF_CONFIG_OPTION_INDIC */
136 
137 
138 /* END */
139