2 * Copyright © 2011 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Behdad Esfahbod
27 #include "hb-shaper-impl.hh"
29 #ifndef HB_NO_FALLBACK_SHAPE
35 struct hb_fallback_face_data_t {};
37 hb_fallback_face_data_t *
38 _hb_fallback_shaper_face_data_create (hb_face_t *face HB_UNUSED)
40 return (hb_fallback_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
44 _hb_fallback_shaper_face_data_destroy (hb_fallback_face_data_t *data HB_UNUSED)
53 struct hb_fallback_font_data_t {};
55 hb_fallback_font_data_t *
56 _hb_fallback_shaper_font_data_create (hb_font_t *font HB_UNUSED)
58 return (hb_fallback_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
62 _hb_fallback_shaper_font_data_destroy (hb_fallback_font_data_t *data HB_UNUSED)
72 _hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
75 const hb_feature_t *features HB_UNUSED,
76 unsigned int num_features HB_UNUSED)
80 * - Apply fallback kern.
81 * - Handle Variation Selectors?
82 * - Apply normalization?
84 * This will make the fallback shaper into a dumb "TrueType"
85 * shaper which many people unfortunately still request.
89 bool has_space = (bool) font->get_nominal_glyph (' ', &space);
91 buffer->clear_positions ();
93 hb_direction_t direction = buffer->props.direction;
94 hb_unicode_funcs_t *unicode = buffer->unicode;
95 unsigned int count = buffer->len;
96 hb_glyph_info_t *info = buffer->info;
97 hb_glyph_position_t *pos = buffer->pos;
98 for (unsigned int i = 0; i < count; i++)
100 if (has_space && unicode->is_default_ignorable (info[i].codepoint)) {
101 info[i].codepoint = space;
102 pos[i].x_advance = 0;
103 pos[i].y_advance = 0;
106 (void) font->get_nominal_glyph (info[i].codepoint, &info[i].codepoint);
107 font->get_glyph_advance_for_direction (info[i].codepoint,
111 font->subtract_glyph_origin_for_direction (info[i].codepoint,
117 if (HB_DIRECTION_IS_BACKWARD (direction))
118 hb_buffer_reverse (buffer);
120 buffer->clear_glyph_flags ();