hb-ot-shape-private.hh revision a8c6da90f4c6e8d27a3a1b758a55476776d9f750 
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()	var1.u8[0]
38#define unicode_props1()	var1.u8[1]
39
40
41
42struct 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
56struct 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
84inline 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_zero_width (info->codepoint) ? 0x80 : 0);
89  info->unicode_props1() = unicode->modified_combining_class (info->codepoint);
90}
91
92inline 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
98inline unsigned int
99_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
100{
101  return info->unicode_props1();
102}
103
104inline hb_bool_t
105_hb_glyph_info_is_zero_width (const hb_glyph_info_t *info)
106{
107  return !!(info->unicode_props0() & 0x80);
108}
109
110#endif /* HB_OT_SHAPE_PRIVATE_HH */
111