third_party/harfbuzz-ng/src/hb-ot-shape-private.hh

   1 /*
   2  * Copyright © 2010  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_PRIVATE_HH
  28 #define HB_OT_SHAPE_PRIVATE_HH
  29
  30 #include "hb-private.hh"
  31
  32 #include "hb-ot-map-private.hh"
  33
  34
  35
  36 /* buffer var allocations, used during the entire shaping process */
  37 #define unicode_props0()        var2.u8[0]
  38 #define unicode_props1()        var2.u8[1]
  39
  40
  41
  42 struct hb_ot_shape_plan_t
  43 {
  44   hb_segment_properties_t props;
  45   const struct hb_ot_complex_shaper_t *shaper;
  46   hb_ot_map_t map;
  47   const void *data;
  48
  49   inline void substitute_closure (hb_face_t *face, hb_set_t *glyphs) const { map.substitute_closure (this, face, glyphs); }
  50   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
  51   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
  52
  53   void finish (void) { map.finish (); }
  54 };
  55
  56 struct hb_ot_shape_planner_t
  57 {
  58   /* In the order that they are filled in. */
  59   hb_face_t *face;
  60   hb_segment_properties_t props;
  61   const struct hb_ot_complex_shaper_t *shaper;
  62   hb_ot_map_builder_t map;
  63
  64   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
  65                          face (master_plan->face),
  66                          props (master_plan->props),
  67                          shaper (NULL),
  68                          map () {}
  69   ~hb_ot_shape_planner_t (void) { map.finish (); }
  70
  71   inline void compile (hb_ot_shape_plan_t &plan)
  72   {
  73     plan.props = props;
  74     plan.shaper = shaper;
  75     map.compile (face, &props, plan.map);
  76   }
  77
  78   private:
  79   NO_COPY (hb_ot_shape_planner_t);
  80 };
  81
  82
  83
  84 inline void
  85 _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
  86 {
  87   info->unicode_props0() = ((unsigned int) unicode->general_category (info->codepoint)) |
  88                            (unicode->is_default_ignorable (info->codepoint) ? 0x80 : 0);
  89   info->unicode_props1() = unicode->modified_combining_class (info->codepoint);
  90 }
  91
  92 inline hb_unicode_general_category_t
  93 _hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
  94 {
  95   return (hb_unicode_general_category_t) (info->unicode_props0() & 0x7F);
  96 }
  97
  98 inline void
  99 _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, unsigned int modified_class)
 100 {
 101   info->unicode_props1() = modified_class;
 102 }
 103
 104 inline unsigned int
 105 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
 106 {
 107   return info->unicode_props1();
 108 }
 109
 110 inline hb_bool_t
 111 _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info)
 112 {
 113   return !!(info->unicode_props0() & 0x80);
 114 }
 115
 116 #endif /* HB_OT_SHAPE_PRIVATE_HH */