src/hb-ot-shape-complex-private.hh

   1 /*
   2  * Copyright © 2010,2011  Google, Inc.
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  *
  24  * Google Author(s): Behdad Esfahbod
  25  */
  26
  27 #ifndef HB_OT_SHAPE_COMPLEX_PRIVATE_HH
  28 #define HB_OT_SHAPE_COMPLEX_PRIVATE_HH
  29
  30 #include "hb-private.hh"
  31
  32 #include "hb-ot-shape-private.hh"
  33
  34 HB_BEGIN_DECLS
  35
  36
  37 static inline hb_ot_complex_shaper_t
  38 hb_ot_shape_complex_categorize (const hb_segment_properties_t *props)
  39 {
  40   switch ((int) props->script)
  41   {
  42     case HB_SCRIPT_ARABIC:
  43     case HB_SCRIPT_MANDAIC:
  44     case HB_SCRIPT_MONGOLIAN:
  45     case HB_SCRIPT_NKO:
  46     case HB_SCRIPT_SYRIAC:
  47       return hb_ot_complex_shaper_arabic;
  48
  49     /* TODO: These are all the scripts that the ucd/IndicSyllabicCategory.txt covers.
  50      * Quite possibly many of these need no shaping, and some other are encoded visually.
  51      * Needs to be refined.
  52      */
  53     case HB_SCRIPT_BALINESE:
  54     case HB_SCRIPT_BATAK:
  55     case HB_SCRIPT_BENGALI:
  56     case HB_SCRIPT_BRAHMI:
  57     case HB_SCRIPT_BUGINESE:
  58     case HB_SCRIPT_BUHID:
  59     case HB_SCRIPT_CHAM:
  60     case HB_SCRIPT_DEVANAGARI:
  61     case HB_SCRIPT_GUJARATI:
  62     case HB_SCRIPT_GURMUKHI:
  63     case HB_SCRIPT_HANUNOO:
  64     case HB_SCRIPT_JAVANESE:
  65     case HB_SCRIPT_KAITHI:
  66     case HB_SCRIPT_KANNADA:
  67     case HB_SCRIPT_KAYAH_LI:
  68     case HB_SCRIPT_KHAROSHTHI:
  69     case HB_SCRIPT_KHMER:
  70     case HB_SCRIPT_LAO:
  71     case HB_SCRIPT_LEPCHA:
  72     case HB_SCRIPT_LIMBU:
  73     case HB_SCRIPT_MALAYALAM:
  74     case HB_SCRIPT_MEETEI_MAYEK:
  75     case HB_SCRIPT_MYANMAR:
  76     case HB_SCRIPT_NEW_TAI_LUE:
  77     case HB_SCRIPT_ORIYA:
  78     case HB_SCRIPT_PHAGS_PA:
  79     case HB_SCRIPT_REJANG:
  80     case HB_SCRIPT_SAURASHTRA:
  81     case HB_SCRIPT_SINHALA:
  82     case HB_SCRIPT_SUNDANESE:
  83     case HB_SCRIPT_SYLOTI_NAGRI:
  84     case HB_SCRIPT_TAGALOG:
  85     case HB_SCRIPT_TAGBANWA:
  86     case HB_SCRIPT_TAI_LE:
  87     case HB_SCRIPT_TAI_THAM:
  88     case HB_SCRIPT_TAI_VIET:
  89     case HB_SCRIPT_TAMIL:
  90     case HB_SCRIPT_TELUGU:
  91     case HB_SCRIPT_THAI:
  92     case HB_SCRIPT_TIBETAN:
  93       return hb_ot_complex_shaper_indic;
  94
  95     default:
  96       return hb_ot_complex_shaper_none;
  97   }
  98 }
  99
 100
 101
 102 /*
 103  * collect_features()
 104  *
 105  * Called during shape_plan().
 106  *
 107  * Shapers should use plan->map to add their features.
 108  */
 109
 110 HB_INTERNAL void _hb_ot_shape_complex_collect_features_arabic   (hb_ot_shape_planner_t *plan, const hb_segment_properties_t  *props);
 111 HB_INTERNAL void _hb_ot_shape_complex_collect_features_indic    (hb_ot_shape_planner_t *plan, const hb_segment_properties_t  *props);
 112
 113 static inline void
 114 hb_ot_shape_complex_collect_features (hb_ot_shape_planner_t *planner,
 115                                       const hb_segment_properties_t  *props)
 116 {
 117   switch (planner->shaper) {
 118     case hb_ot_complex_shaper_arabic:   _hb_ot_shape_complex_collect_features_arabic    (planner, props);       return;
 119     case hb_ot_complex_shaper_indic:    _hb_ot_shape_complex_collect_features_indic     (planner, props);       return;
 120     case hb_ot_complex_shaper_none:     default:                                                                return;
 121   }
 122 }
 123
 124
 125 /* setup_masks()
 126  *
 127  * Called during shape_execute().
 128  *
 129  * Shapers should use c->plan.map to get feature masks and set on buffer.
 130  */
 131
 132 HB_INTERNAL void _hb_ot_shape_complex_setup_masks_arabic        (hb_ot_shape_context_t *c);
 133 HB_INTERNAL void _hb_ot_shape_complex_setup_masks_indic         (hb_ot_shape_context_t *c);
 134
 135 static inline void
 136 hb_ot_shape_complex_setup_masks (hb_ot_shape_context_t *c)
 137 {
 138   switch (c->plan->shaper) {
 139     case hb_ot_complex_shaper_arabic:   _hb_ot_shape_complex_setup_masks_arabic (c);    return;
 140     case hb_ot_complex_shaper_indic:    _hb_ot_shape_complex_setup_masks_indic (c);     return;
 141     case hb_ot_complex_shaper_none:     default:                                        return;
 142   }
 143 }
 144
 145
 146 HB_END_DECLS
 147
 148 #endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */