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 (at) redhat.com>, <b.rahul.pm (at) 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
