author | prr |
Thu, 07 Dec 2017 11:55:06 -0800 | |
changeset 48274 | 51772bf1fb0c |
parent 47216 | 71c04702a3d5 |
child 50352 | 25db2c8f3cf8 |
permissions | -rw-r--r-- |
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/* |
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* Copyright © 2015 Mozilla Foundation. |
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* Copyright © 2015 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Mozilla Author(s): Jonathan Kew |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#include "hb-ot-shape-complex-use-private.hh" |
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#include "hb-ot-shape-complex-arabic-private.hh" |
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/* buffer var allocations */ |
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#define use_category() complex_var_u8_0() |
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/* |
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* Universal Shaping Engine. |
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* https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm |
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*/ |
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static const hb_tag_t |
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basic_features[] = |
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{ |
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/* |
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* Basic features. |
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* These features are applied all at once, before reordering. |
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*/ |
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HB_TAG('r','k','r','f'), |
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HB_TAG('a','b','v','f'), |
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HB_TAG('b','l','w','f'), |
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HB_TAG('h','a','l','f'), |
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HB_TAG('p','s','t','f'), |
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HB_TAG('v','a','t','u'), |
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HB_TAG('c','j','c','t'), |
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}; |
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static const hb_tag_t |
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arabic_features[] = |
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{ |
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HB_TAG('i','s','o','l'), |
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HB_TAG('i','n','i','t'), |
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HB_TAG('m','e','d','i'), |
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HB_TAG('f','i','n','a'), |
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/* The spec doesn't specify these but we apply anyway, since our Arabic shaper |
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* does. These are only used in Syriac spec. */ |
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HB_TAG('m','e','d','2'), |
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HB_TAG('f','i','n','2'), |
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HB_TAG('f','i','n','3'), |
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}; |
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/* Same order as arabic_features. Don't need Syriac stuff.*/ |
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enum joining_form_t { |
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ISOL, |
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INIT, |
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MEDI, |
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FINA, |
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_NONE |
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}; |
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static const hb_tag_t |
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other_features[] = |
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{ |
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/* |
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* Other features. |
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* These features are applied all at once, after reordering. |
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*/ |
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HB_TAG('a','b','v','s'), |
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HB_TAG('b','l','w','s'), |
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HB_TAG('h','a','l','n'), |
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HB_TAG('p','r','e','s'), |
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HB_TAG('p','s','t','s'), |
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/* Positioning features, though we don't care about the types. */ |
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HB_TAG('d','i','s','t'), |
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HB_TAG('a','b','v','m'), |
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HB_TAG('b','l','w','m'), |
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}; |
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static void |
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setup_syllables (const hb_ot_shape_plan_t *plan, |
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hb_font_t *font, |
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hb_buffer_t *buffer); |
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static void |
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clear_substitution_flags (const hb_ot_shape_plan_t *plan, |
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hb_font_t *font, |
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hb_buffer_t *buffer); |
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static void |
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record_rphf (const hb_ot_shape_plan_t *plan, |
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hb_font_t *font, |
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hb_buffer_t *buffer); |
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static void |
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record_pref (const hb_ot_shape_plan_t *plan, |
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hb_font_t *font, |
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hb_buffer_t *buffer); |
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static void |
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reorder (const hb_ot_shape_plan_t *plan, |
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hb_font_t *font, |
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hb_buffer_t *buffer); |
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static void |
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collect_features_use (hb_ot_shape_planner_t *plan) |
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{ |
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hb_ot_map_builder_t *map = &plan->map; |
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/* Do this before any lookups have been applied. */ |
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map->add_gsub_pause (setup_syllables); |
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124 |
/* "Default glyph pre-processing group" */ |
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125 |
map->add_global_bool_feature (HB_TAG('l','o','c','l')); |
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126 |
map->add_global_bool_feature (HB_TAG('c','c','m','p')); |
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127 |
map->add_global_bool_feature (HB_TAG('n','u','k','t')); |
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128 |
map->add_global_bool_feature (HB_TAG('a','k','h','n')); |
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129 |
|
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130 |
/* "Reordering group" */ |
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131 |
map->add_gsub_pause (clear_substitution_flags); |
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132 |
map->add_feature (HB_TAG('r','p','h','f'), 1, F_MANUAL_ZWJ); |
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133 |
map->add_gsub_pause (record_rphf); |
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134 |
map->add_gsub_pause (clear_substitution_flags); |
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135 |
map->add_feature (HB_TAG('p','r','e','f'), 1, F_GLOBAL | F_MANUAL_ZWJ); |
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|
136 |
map->add_gsub_pause (record_pref); |
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|
137 |
|
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|
138 |
/* "Orthographic unit shaping group" */ |
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|
139 |
for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++) |
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|
140 |
map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ); |
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|
141 |
|
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142 |
map->add_gsub_pause (reorder); |
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|
143 |
|
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|
144 |
/* "Topographical features" */ |
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|
145 |
for (unsigned int i = 0; i < ARRAY_LENGTH (arabic_features); i++) |
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|
146 |
map->add_feature (arabic_features[i], 1, F_NONE); |
48274 | 147 |
map->add_gsub_pause (nullptr); |
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148 |
|
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149 |
/* "Standard typographic presentation" and "Positional feature application" */ |
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|
150 |
for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++) |
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|
151 |
map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ); |
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152 |
} |
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153 |
|
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154 |
struct use_shape_plan_t |
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155 |
{ |
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|
156 |
ASSERT_POD (); |
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|
157 |
|
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|
158 |
hb_mask_t rphf_mask; |
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|
159 |
|
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|
160 |
arabic_shape_plan_t *arabic_plan; |
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|
161 |
}; |
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|
162 |
|
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163 |
static bool |
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164 |
has_arabic_joining (hb_script_t script) |
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165 |
{ |
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|
166 |
/* List of scripts that have data in arabic-table. */ |
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|
167 |
switch ((int) script) |
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168 |
{ |
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|
169 |
/* Unicode-1.1 additions */ |
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|
170 |
case HB_SCRIPT_ARABIC: |
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|
171 |
|
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|
172 |
/* Unicode-3.0 additions */ |
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|
173 |
case HB_SCRIPT_MONGOLIAN: |
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|
174 |
case HB_SCRIPT_SYRIAC: |
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|
175 |
|
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|
176 |
/* Unicode-5.0 additions */ |
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|
177 |
case HB_SCRIPT_NKO: |
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|
178 |
case HB_SCRIPT_PHAGS_PA: |
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|
179 |
|
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|
180 |
/* Unicode-6.0 additions */ |
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|
181 |
case HB_SCRIPT_MANDAIC: |
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|
182 |
|
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|
183 |
/* Unicode-7.0 additions */ |
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|
184 |
case HB_SCRIPT_MANICHAEAN: |
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|
185 |
case HB_SCRIPT_PSALTER_PAHLAVI: |
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|
186 |
|
40435 | 187 |
/* Unicode-9.0 additions */ |
188 |
case HB_SCRIPT_ADLAM: |
|
189 |
||
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|
190 |
return true; |
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|
191 |
|
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|
192 |
default: |
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|
193 |
return false; |
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|
194 |
} |
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|
195 |
} |
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|
196 |
|
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|
197 |
static void * |
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|
198 |
data_create_use (const hb_ot_shape_plan_t *plan) |
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|
199 |
{ |
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|
200 |
use_shape_plan_t *use_plan = (use_shape_plan_t *) calloc (1, sizeof (use_shape_plan_t)); |
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|
201 |
if (unlikely (!use_plan)) |
48274 | 202 |
return nullptr; |
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|
203 |
|
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|
204 |
use_plan->rphf_mask = plan->map.get_1_mask (HB_TAG('r','p','h','f')); |
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|
205 |
|
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|
206 |
if (has_arabic_joining (plan->props.script)) |
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|
207 |
{ |
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|
208 |
use_plan->arabic_plan = (arabic_shape_plan_t *) data_create_arabic (plan); |
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|
209 |
if (unlikely (!use_plan->arabic_plan)) |
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|
210 |
{ |
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|
211 |
free (use_plan); |
48274 | 212 |
return nullptr; |
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|
213 |
} |
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|
214 |
} |
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|
215 |
|
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|
216 |
return use_plan; |
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|
217 |
} |
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|
218 |
|
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|
219 |
static void |
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|
220 |
data_destroy_use (void *data) |
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|
221 |
{ |
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|
222 |
use_shape_plan_t *use_plan = (use_shape_plan_t *) data; |
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|
223 |
|
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|
224 |
if (use_plan->arabic_plan) |
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|
225 |
data_destroy_arabic (use_plan->arabic_plan); |
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|
226 |
|
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|
227 |
free (data); |
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|
228 |
} |
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|
229 |
|
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|
230 |
enum syllable_type_t { |
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|
231 |
independent_cluster, |
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|
232 |
virama_terminated_cluster, |
40435 | 233 |
standard_cluster, |
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234 |
number_joiner_terminated_cluster, |
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|
235 |
numeral_cluster, |
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|
236 |
symbol_cluster, |
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|
237 |
broken_cluster, |
40435 | 238 |
non_cluster, |
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|
239 |
}; |
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|
240 |
|
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|
241 |
#include "hb-ot-shape-complex-use-machine.hh" |
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|
242 |
|
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|
243 |
|
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|
244 |
static void |
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245 |
setup_masks_use (const hb_ot_shape_plan_t *plan, |
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|
246 |
hb_buffer_t *buffer, |
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|
247 |
hb_font_t *font HB_UNUSED) |
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248 |
{ |
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249 |
const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; |
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250 |
|
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|
251 |
/* Do this before allocating use_category(). */ |
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|
252 |
if (use_plan->arabic_plan) |
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|
253 |
{ |
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|
254 |
setup_masks_arabic_plan (use_plan->arabic_plan, buffer, plan->props.script); |
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255 |
} |
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256 |
|
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|
257 |
HB_BUFFER_ALLOCATE_VAR (buffer, use_category); |
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|
258 |
|
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|
259 |
/* We cannot setup masks here. We save information about characters |
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|
260 |
* and setup masks later on in a pause-callback. */ |
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|
261 |
|
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|
262 |
unsigned int count = buffer->len; |
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|
263 |
hb_glyph_info_t *info = buffer->info; |
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|
264 |
for (unsigned int i = 0; i < count; i++) |
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|
265 |
info[i].use_category() = hb_use_get_categories (info[i].codepoint); |
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|
266 |
} |
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267 |
|
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268 |
static void |
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|
269 |
setup_rphf_mask (const hb_ot_shape_plan_t *plan, |
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|
270 |
hb_buffer_t *buffer) |
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271 |
{ |
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272 |
const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; |
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273 |
|
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|
274 |
hb_mask_t mask = use_plan->rphf_mask; |
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|
275 |
if (!mask) return; |
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|
276 |
|
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|
277 |
hb_glyph_info_t *info = buffer->info; |
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|
278 |
|
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|
279 |
foreach_syllable (buffer, start, end) |
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|
280 |
{ |
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|
281 |
unsigned int limit = info[start].use_category() == USE_R ? 1 : MIN (3u, end - start); |
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|
282 |
for (unsigned int i = start; i < start + limit; i++) |
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|
283 |
info[i].mask |= mask; |
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|
284 |
} |
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|
285 |
} |
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|
286 |
|
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|
287 |
static void |
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|
288 |
setup_topographical_masks (const hb_ot_shape_plan_t *plan, |
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|
289 |
hb_buffer_t *buffer) |
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|
290 |
{ |
40435 | 291 |
const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; |
292 |
if (use_plan->arabic_plan) |
|
293 |
return; |
|
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|
294 |
|
48274 | 295 |
static_assert ((INIT < 4 && ISOL < 4 && MEDI < 4 && FINA < 4), ""); |
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|
296 |
hb_mask_t masks[4], all_masks = 0; |
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|
297 |
for (unsigned int i = 0; i < 4; i++) |
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|
298 |
{ |
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|
299 |
masks[i] = plan->map.get_1_mask (arabic_features[i]); |
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|
300 |
if (masks[i] == plan->map.get_global_mask ()) |
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|
301 |
masks[i] = 0; |
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|
302 |
all_masks |= masks[i]; |
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|
303 |
} |
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changeset
|
304 |
if (!all_masks) |
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parents:
diff
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|
305 |
return; |
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|
306 |
hb_mask_t other_masks = ~all_masks; |
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changeset
|
307 |
|
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changeset
|
308 |
unsigned int last_start = 0; |
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parents:
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|
309 |
joining_form_t last_form = _NONE; |
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|
310 |
hb_glyph_info_t *info = buffer->info; |
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changeset
|
311 |
foreach_syllable (buffer, start, end) |
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changeset
|
312 |
{ |
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|
313 |
syllable_type_t syllable_type = (syllable_type_t) (info[start].syllable() & 0x0F); |
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|
314 |
switch (syllable_type) |
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|
315 |
{ |
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parents:
diff
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|
316 |
case independent_cluster: |
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changeset
|
317 |
case symbol_cluster: |
40435 | 318 |
case non_cluster: |
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diff
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|
319 |
/* These don't join. Nothing to do. */ |
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parents:
diff
changeset
|
320 |
last_form = _NONE; |
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parents:
diff
changeset
|
321 |
break; |
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prr
parents:
diff
changeset
|
322 |
|
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parents:
diff
changeset
|
323 |
case virama_terminated_cluster: |
40435 | 324 |
case standard_cluster: |
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|
325 |
case number_joiner_terminated_cluster: |
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parents:
diff
changeset
|
326 |
case numeral_cluster: |
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parents:
diff
changeset
|
327 |
case broken_cluster: |
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parents:
diff
changeset
|
328 |
|
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parents:
diff
changeset
|
329 |
bool join = last_form == FINA || last_form == ISOL; |
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parents:
diff
changeset
|
330 |
|
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prr
parents:
diff
changeset
|
331 |
if (join) |
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parents:
diff
changeset
|
332 |
{ |
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prr
parents:
diff
changeset
|
333 |
/* Fixup previous syllable's form. */ |
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parents:
diff
changeset
|
334 |
last_form = last_form == FINA ? MEDI : INIT; |
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parents:
diff
changeset
|
335 |
for (unsigned int i = last_start; i < start; i++) |
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parents:
diff
changeset
|
336 |
info[i].mask = (info[i].mask & other_masks) | masks[last_form]; |
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parents:
diff
changeset
|
337 |
} |
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prr
parents:
diff
changeset
|
338 |
|
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parents:
diff
changeset
|
339 |
/* Form for this syllable. */ |
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prr
parents:
diff
changeset
|
340 |
last_form = join ? FINA : ISOL; |
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parents:
diff
changeset
|
341 |
for (unsigned int i = start; i < end; i++) |
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parents:
diff
changeset
|
342 |
info[i].mask = (info[i].mask & other_masks) | masks[last_form]; |
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prr
parents:
diff
changeset
|
343 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
344 |
break; |
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prr
parents:
diff
changeset
|
345 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
346 |
|
e496a8d8fc8a
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parents:
diff
changeset
|
347 |
last_start = start; |
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parents:
diff
changeset
|
348 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
349 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
350 |
|
e496a8d8fc8a
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parents:
diff
changeset
|
351 |
static void |
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parents:
diff
changeset
|
352 |
setup_syllables (const hb_ot_shape_plan_t *plan, |
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parents:
diff
changeset
|
353 |
hb_font_t *font HB_UNUSED, |
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parents:
diff
changeset
|
354 |
hb_buffer_t *buffer) |
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parents:
diff
changeset
|
355 |
{ |
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parents:
diff
changeset
|
356 |
find_syllables (buffer); |
48274 | 357 |
foreach_syllable (buffer, start, end) |
358 |
buffer->unsafe_to_break (start, end); |
|
34414
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parents:
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changeset
|
359 |
setup_rphf_mask (plan, buffer); |
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parents:
diff
changeset
|
360 |
setup_topographical_masks (plan, buffer); |
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parents:
diff
changeset
|
361 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
362 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
363 |
static void |
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parents:
diff
changeset
|
364 |
clear_substitution_flags (const hb_ot_shape_plan_t *plan, |
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parents:
diff
changeset
|
365 |
hb_font_t *font HB_UNUSED, |
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parents:
diff
changeset
|
366 |
hb_buffer_t *buffer) |
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parents:
diff
changeset
|
367 |
{ |
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parents:
diff
changeset
|
368 |
hb_glyph_info_t *info = buffer->info; |
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parents:
diff
changeset
|
369 |
unsigned int count = buffer->len; |
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prr
parents:
diff
changeset
|
370 |
for (unsigned int i = 0; i < count; i++) |
40435 | 371 |
_hb_glyph_info_clear_substituted (&info[i]); |
34414
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parents:
diff
changeset
|
372 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
373 |
|
e496a8d8fc8a
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parents:
diff
changeset
|
374 |
static void |
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parents:
diff
changeset
|
375 |
record_rphf (const hb_ot_shape_plan_t *plan, |
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parents:
diff
changeset
|
376 |
hb_font_t *font, |
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parents:
diff
changeset
|
377 |
hb_buffer_t *buffer) |
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parents:
diff
changeset
|
378 |
{ |
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parents:
diff
changeset
|
379 |
const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
380 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
381 |
hb_mask_t mask = use_plan->rphf_mask; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
382 |
if (!mask) return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
383 |
hb_glyph_info_t *info = buffer->info; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
384 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
385 |
foreach_syllable (buffer, start, end) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
386 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
387 |
/* Mark a substituted repha as USE_R. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
388 |
for (unsigned int i = start; i < end && (info[i].mask & mask); i++) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
389 |
if (_hb_glyph_info_substituted (&info[i])) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
390 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
391 |
info[i].use_category() = USE_R; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
392 |
break; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
393 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
394 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
395 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
396 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
397 |
static void |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
398 |
record_pref (const hb_ot_shape_plan_t *plan, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
399 |
hb_font_t *font, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
400 |
hb_buffer_t *buffer) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
401 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
402 |
hb_glyph_info_t *info = buffer->info; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
403 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
404 |
foreach_syllable (buffer, start, end) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
405 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
406 |
/* Mark a substituted pref as VPre, as they behave the same way. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
407 |
for (unsigned int i = start; i < end; i++) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
408 |
if (_hb_glyph_info_substituted (&info[i])) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
409 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
410 |
info[i].use_category() = USE_VPre; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
411 |
break; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
412 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
413 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
414 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
415 |
|
40435 | 416 |
static inline bool |
417 |
is_halant (const hb_glyph_info_t &info) |
|
418 |
{ |
|
419 |
return info.use_category() == USE_H && !_hb_glyph_info_ligated (&info); |
|
420 |
} |
|
421 |
||
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
422 |
static void |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
423 |
reorder_syllable (hb_buffer_t *buffer, unsigned int start, unsigned int end) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
424 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
425 |
syllable_type_t syllable_type = (syllable_type_t) (buffer->info[start].syllable() & 0x0F); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
426 |
/* Only a few syllable types need reordering. */ |
48274 | 427 |
if (unlikely (!(FLAG_UNSAFE (syllable_type) & |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
428 |
(FLAG (virama_terminated_cluster) | |
40435 | 429 |
FLAG (standard_cluster) | |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
430 |
FLAG (broken_cluster) | |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
431 |
0)))) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
432 |
return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
433 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
434 |
hb_glyph_info_t *info = buffer->info; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
435 |
|
40435 | 436 |
#define BASE_FLAGS (FLAG (USE_B) | FLAG (USE_GB)) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
437 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
438 |
/* Move things forward. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
439 |
if (info[start].use_category() == USE_R && end - start > 1) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
440 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
441 |
/* Got a repha. Reorder it to after first base, before first halant. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
442 |
for (unsigned int i = start + 1; i < end; i++) |
40435 | 443 |
if ((FLAG_UNSAFE (info[i].use_category()) & (BASE_FLAGS)) || is_halant (info[i])) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
444 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
445 |
/* If we hit a halant, move before it; otherwise it's a base: move to it's |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
446 |
* place, and shift things in between backward. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
447 |
|
40435 | 448 |
if (is_halant (info[i])) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
449 |
i--; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
450 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
451 |
buffer->merge_clusters (start, i + 1); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
452 |
hb_glyph_info_t t = info[start]; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
453 |
memmove (&info[start], &info[start + 1], (i - start) * sizeof (info[0])); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
454 |
info[i] = t; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
455 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
456 |
break; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
457 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
458 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
459 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
460 |
/* Move things back. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
461 |
unsigned int j = end; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
462 |
for (unsigned int i = start; i < end; i++) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
463 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
464 |
uint32_t flag = FLAG_UNSAFE (info[i].use_category()); |
40435 | 465 |
if ((flag & (BASE_FLAGS)) || is_halant (info[i])) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
466 |
{ |
40435 | 467 |
/* If we hit a halant, move after it; otherwise it's a base: move to it's |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
468 |
* place, and shift things in between backward. */ |
40435 | 469 |
if (is_halant (info[i])) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
470 |
j = i + 1; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
471 |
else |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
472 |
j = i; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
473 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
474 |
else if (((flag) & (FLAG (USE_VPre) | FLAG (USE_VMPre))) && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
475 |
/* Only move the first component of a MultipleSubst. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
476 |
0 == _hb_glyph_info_get_lig_comp (&info[i]) && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
477 |
j < i) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
478 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
479 |
buffer->merge_clusters (j, i + 1); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
480 |
hb_glyph_info_t t = info[i]; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
481 |
memmove (&info[j + 1], &info[j], (i - j) * sizeof (info[0])); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
482 |
info[j] = t; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
483 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
484 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
485 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
486 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
487 |
static inline void |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
488 |
insert_dotted_circles (const hb_ot_shape_plan_t *plan HB_UNUSED, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
489 |
hb_font_t *font, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
490 |
hb_buffer_t *buffer) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
491 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
492 |
/* Note: This loop is extra overhead, but should not be measurable. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
493 |
bool has_broken_syllables = false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
494 |
unsigned int count = buffer->len; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
495 |
hb_glyph_info_t *info = buffer->info; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
496 |
for (unsigned int i = 0; i < count; i++) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
497 |
if ((info[i].syllable() & 0x0F) == broken_cluster) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
498 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
499 |
has_broken_syllables = true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
500 |
break; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
501 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
502 |
if (likely (!has_broken_syllables)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
503 |
return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
504 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
505 |
hb_glyph_info_t dottedcircle = {0}; |
40435 | 506 |
if (!font->get_nominal_glyph (0x25CCu, &dottedcircle.codepoint)) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
507 |
return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
508 |
dottedcircle.use_category() = hb_use_get_categories (0x25CC); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
509 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
510 |
buffer->clear_output (); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
511 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
512 |
buffer->idx = 0; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
513 |
unsigned int last_syllable = 0; |
40435 | 514 |
while (buffer->idx < buffer->len && !buffer->in_error) |
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
515 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
516 |
unsigned int syllable = buffer->cur().syllable(); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
517 |
syllable_type_t syllable_type = (syllable_type_t) (syllable & 0x0F); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
518 |
if (unlikely (last_syllable != syllable && syllable_type == broken_cluster)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
519 |
{ |
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parents:
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|
520 |
last_syllable = syllable; |
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parents:
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changeset
|
521 |
|
40435 | 522 |
hb_glyph_info_t ginfo = dottedcircle; |
523 |
ginfo.cluster = buffer->cur().cluster; |
|
524 |
ginfo.mask = buffer->cur().mask; |
|
525 |
ginfo.syllable() = buffer->cur().syllable(); |
|
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|
526 |
/* TODO Set glyph_props? */ |
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changeset
|
527 |
|
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parents:
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changeset
|
528 |
/* Insert dottedcircle after possible Repha. */ |
40435 | 529 |
while (buffer->idx < buffer->len && !buffer->in_error && |
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|
530 |
last_syllable == buffer->cur().syllable() && |
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parents:
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|
531 |
buffer->cur().use_category() == USE_R) |
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parents:
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|
532 |
buffer->next_glyph (); |
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parents:
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changeset
|
533 |
|
40435 | 534 |
buffer->output_info (ginfo); |
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|
535 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
536 |
else |
e496a8d8fc8a
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parents:
diff
changeset
|
537 |
buffer->next_glyph (); |
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parents:
diff
changeset
|
538 |
} |
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parents:
diff
changeset
|
539 |
|
e496a8d8fc8a
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parents:
diff
changeset
|
540 |
buffer->swap_buffers (); |
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prr
parents:
diff
changeset
|
541 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
542 |
|
e496a8d8fc8a
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parents:
diff
changeset
|
543 |
static void |
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parents:
diff
changeset
|
544 |
reorder (const hb_ot_shape_plan_t *plan, |
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parents:
diff
changeset
|
545 |
hb_font_t *font, |
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parents:
diff
changeset
|
546 |
hb_buffer_t *buffer) |
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parents:
diff
changeset
|
547 |
{ |
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parents:
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changeset
|
548 |
insert_dotted_circles (plan, font, buffer); |
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parents:
diff
changeset
|
549 |
|
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parents:
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changeset
|
550 |
hb_glyph_info_t *info = buffer->info; |
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parents:
diff
changeset
|
551 |
|
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parents:
diff
changeset
|
552 |
foreach_syllable (buffer, start, end) |
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parents:
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changeset
|
553 |
reorder_syllable (buffer, start, end); |
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prr
parents:
diff
changeset
|
554 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
555 |
/* Zero syllables now... */ |
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parents:
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changeset
|
556 |
unsigned int count = buffer->len; |
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prr
parents:
diff
changeset
|
557 |
for (unsigned int i = 0; i < count; i++) |
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parents:
diff
changeset
|
558 |
info[i].syllable() = 0; |
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prr
parents:
diff
changeset
|
559 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
560 |
HB_BUFFER_DEALLOCATE_VAR (buffer, use_category); |
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parents:
diff
changeset
|
561 |
} |
e496a8d8fc8a
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parents:
diff
changeset
|
562 |
|
e496a8d8fc8a
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parents:
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changeset
|
563 |
static bool |
43232 | 564 |
decompose_use (const hb_ot_shape_normalize_context_t *c, |
565 |
hb_codepoint_t ab, |
|
566 |
hb_codepoint_t *a, |
|
567 |
hb_codepoint_t *b) |
|
568 |
{ |
|
569 |
switch (ab) |
|
570 |
{ |
|
571 |
/* Chakma: |
|
572 |
* Special case where the Unicode decomp gives matras in the wrong order |
|
573 |
* for cluster validation. |
|
574 |
*/ |
|
575 |
case 0x1112Eu : *a = 0x11127u; *b= 0x11131u; return true; |
|
576 |
case 0x1112Fu : *a = 0x11127u; *b= 0x11132u; return true; |
|
577 |
} |
|
578 |
||
579 |
return (bool) c->unicode->decompose (ab, a, b); |
|
580 |
} |
|
581 |
||
582 |
static bool |
|
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parents:
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changeset
|
583 |
compose_use (const hb_ot_shape_normalize_context_t *c, |
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prr
parents:
diff
changeset
|
584 |
hb_codepoint_t a, |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
585 |
hb_codepoint_t b, |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
586 |
hb_codepoint_t *ab) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
587 |
{ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
588 |
/* Avoid recomposing split matras. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
589 |
if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (c->unicode->general_category (a))) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
590 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
591 |
|
40435 | 592 |
return (bool)c->unicode->compose (a, b, ab); |
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parents:
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changeset
|
593 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
594 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
595 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
596 |
const hb_ot_complex_shaper_t _hb_ot_complex_shaper_use = |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
597 |
{ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
598 |
collect_features_use, |
48274 | 599 |
nullptr, /* override_features */ |
34414
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prr
parents:
diff
changeset
|
600 |
data_create_use, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
601 |
data_destroy_use, |
48274 | 602 |
nullptr, /* preprocess_text */ |
603 |
nullptr, /* postprocess_glyphs */ |
|
34414
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prr
parents:
diff
changeset
|
604 |
HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT, |
43232 | 605 |
decompose_use, |
34414
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prr
parents:
diff
changeset
|
606 |
compose_use, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
607 |
setup_masks_use, |
48274 | 608 |
nullptr, /* disable_otl */ |
609 |
nullptr, /* reorder_marks */ |
|
40435 | 610 |
HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY, |
34414
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prr
parents:
diff
changeset
|
611 |
false, /* fallback_position */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
612 |
}; |