hb-ot-shape-private.hh revision 8bb5deba9630d35878eb6edb4643ecfabf99f15f 
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
48  inline void substitute_closure (hb_face_t *face, hb_set_t *glyphs) const { map.substitute_closure (this, face, glyphs); }
49  inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
50  inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
51
52  void finish (void) { map.finish (); }
53};
54
55struct hb_ot_shape_planner_t
56{
57  /* In the order that they are filled in. */
58  hb_face_t *face;
59  hb_segment_properties_t props;
60  const struct hb_ot_complex_shaper_t *shaper;
61  hb_ot_map_builder_t map;
62
63  hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
64			 face (master_plan->face),
65			 props (master_plan->props),
66			 shaper (NULL),
67			 map () {}
68  ~hb_ot_shape_planner_t (void) { map.finish (); }
69
70  inline void compile (hb_ot_shape_plan_t &plan)
71  {
72    plan.props = props;
73    plan.shaper = shaper;
74    map.compile (face, &props, plan.map);
75  }
76
77  private:
78  NO_COPY (hb_ot_shape_planner_t);
79};
80
81
82
83inline void
84_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
85{
86  info->unicode_props0() = ((unsigned int) unicode->general_category (info->codepoint)) |
87			   (unicode->is_zero_width (info->codepoint) ? 0x80 : 0);
88  info->unicode_props1() = unicode->modified_combining_class (info->codepoint);
89}
90
91inline hb_unicode_general_category_t
92_hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
93{
94  return (hb_unicode_general_category_t) (info->unicode_props0() & 0x7F);
95}
96
97inline unsigned int
98_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
99{
100  return info->unicode_props1();
101}
102
103inline hb_bool_t
104_hb_glyph_info_is_zero_width (const hb_glyph_info_t *info)
105{
106  return !!(info->unicode_props0() & 0x80);
107}
108
109#endif /* HB_OT_SHAPE_PRIVATE_HH */
110