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1 /* | 1 /* |
2 * Copyright © 2011 Google, Inc. | 2 * Copyright © 2011 Google, Inc. |
3 * | 3 * |
4 * This is part of HarfBuzz, a text shaping library. | 4 * This is part of HarfBuzz, a text shaping library. |
5 * | 5 * |
6 * Permission is hereby granted, without written agreement and without | 6 * Permission is hereby granted, without written agreement and without |
7 * license or royalty fees, to use, copy, modify, and distribute this | 7 * license or royalty fees, to use, copy, modify, and distribute this |
8 * software and its documentation for any purpose, provided that the | 8 * software and its documentation for any purpose, provided that the |
9 * above copyright notice and the following two paragraphs appear in | 9 * above copyright notice and the following two paragraphs appear in |
10 * all copies of this software. | 10 * all copies of this software. |
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91 hb_bool_t | 91 hb_bool_t |
92 _hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED, | 92 _hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED, |
93 hb_font_t *font, | 93 hb_font_t *font, |
94 hb_buffer_t *buffer, | 94 hb_buffer_t *buffer, |
95 const hb_feature_t *features HB_UNUSED, | 95 const hb_feature_t *features HB_UNUSED, |
96 unsigned int num_features HB_UNUSED) | 96 unsigned int num_features HB_UNUSED) |
97 { | 97 { |
98 hb_codepoint_t space; | 98 hb_codepoint_t space; |
99 font->get_glyph (' ', 0, &space); | 99 font->get_glyph (' ', 0, &space); |
100 | 100 |
101 buffer->guess_segment_properties (); | |
102 buffer->clear_positions (); | 101 buffer->clear_positions (); |
103 | 102 |
104 unsigned int count = buffer->len; | 103 unsigned int count = buffer->len; |
105 | 104 |
106 for (unsigned int i = 0; i < count; i++) | 105 for (unsigned int i = 0; i < count; i++) |
107 { | 106 { |
108 if (buffer->unicode->is_default_ignorable (buffer->info[i].codepoint)) { | 107 if (buffer->unicode->is_default_ignorable (buffer->info[i].codepoint)) { |
109 buffer->info[i].codepoint = space; | 108 buffer->info[i].codepoint = space; |
110 buffer->pos[i].x_advance = 0; | 109 buffer->pos[i].x_advance = 0; |
111 buffer->pos[i].y_advance = 0; | 110 buffer->pos[i].y_advance = 0; |
112 continue; | 111 continue; |
113 } | 112 } |
114 font->get_glyph (buffer->info[i].codepoint, 0, &buffer->info[i].codepoint); | 113 font->get_glyph (buffer->info[i].codepoint, 0, &buffer->info[i].codepoint); |
115 font->get_glyph_advance_for_direction (buffer->info[i].codepoint, | 114 font->get_glyph_advance_for_direction (buffer->info[i].codepoint, |
116 buffer->props.direction, | 115 buffer->props.direction, |
117 &buffer->pos[i].x_advance, | 116 &buffer->pos[i].x_advance, |
118 &buffer->pos[i].y_advance); | 117 &buffer->pos[i].y_advance); |
119 font->subtract_glyph_origin_for_direction (buffer->info[i].codepoint, | 118 font->subtract_glyph_origin_for_direction (buffer->info[i].codepoint, |
120 buffer->props.direction, | 119 buffer->props.direction, |
121 &buffer->pos[i].x_offset, | 120 &buffer->pos[i].x_offset, |
122 &buffer->pos[i].y_offset); | 121 &buffer->pos[i].y_offset); |
123 } | 122 } |
124 | 123 |
125 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) | 124 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) |
126 hb_buffer_reverse (buffer); | 125 hb_buffer_reverse (buffer); |
127 | 126 |
128 return true; | 127 return true; |
129 } | 128 } |
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