src/autofit/afindic.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  afindic.c                                                              */
   4 /*                                                                         */
   5 /*    Auto-fitter hinting routines for Indic writing system (body).        */
   6 /*                                                                         */
   7 /*  Copyright 2007, 2011-2013 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
  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( 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 */