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 #define HB_SHAPER fallback
28 #include "hb-shaper-impl-private.hh"
35 struct hb_fallback_shaper_face_data_t {};
37 hb_fallback_shaper_face_data_t *
38 _hb_fallback_shaper_face_data_create (hb_face_t *face)
40 return (hb_fallback_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
44 _hb_fallback_shaper_face_data_destroy (hb_fallback_shaper_face_data_t *data)
53 struct hb_fallback_shaper_font_data_t {};
55 hb_fallback_shaper_font_data_t *
56 _hb_fallback_shaper_font_data_create (hb_font_t *font)
58 return (hb_fallback_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
62 _hb_fallback_shaper_font_data_destroy (hb_fallback_shaper_font_data_t *data)
68 * shaper shape_plan data
71 struct hb_fallback_shaper_shape_plan_data_t {};
73 hb_fallback_shaper_shape_plan_data_t *
74 _hb_fallback_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
75 const hb_feature_t *user_features HB_UNUSED,
76 unsigned int num_user_features HB_UNUSED)
78 return (hb_fallback_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
82 _hb_fallback_shaper_shape_plan_data_destroy (hb_fallback_shaper_shape_plan_data_t *data HB_UNUSED)
92 _hb_fallback_shape (hb_shape_plan_t *shape_plan,
95 const hb_feature_t *features HB_UNUSED,
96 unsigned int num_features HB_UNUSED)
99 font->get_glyph (' ', 0, &space);
101 buffer->guess_properties ();
102 buffer->clear_positions ();
104 unsigned int count = buffer->len;
106 for (unsigned int i = 0; i < count; i++)
108 if (buffer->unicode->is_zero_width (buffer->info[i].codepoint)) {
109 buffer->info[i].codepoint = space;
110 buffer->pos[i].x_advance = 0;
111 buffer->pos[i].y_advance = 0;
114 font->get_glyph (buffer->info[i].codepoint, 0, &buffer->info[i].codepoint);
115 font->get_glyph_advance_for_direction (buffer->info[i].codepoint,
116 buffer->props.direction,
117 &buffer->pos[i].x_advance,
118 &buffer->pos[i].y_advance);
119 font->subtract_glyph_origin_for_direction (buffer->info[i].codepoint,
120 buffer->props.direction,
121 &buffer->pos[i].x_offset,
122 &buffer->pos[i].y_offset);
125 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
126 hb_buffer_reverse (buffer);