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1 /* | 1 /* |
2 * Copyright (C) 2010 Google, Inc. | 2 * Copyright © 2010 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. |
11 * | 11 * |
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | 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 | 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
16 * DAMAGE. | 16 * DAMAGE. |
17 * | 17 * |
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | 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 | 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
23 * | 23 * |
24 * Google Author(s): Behdad Esfahbod | 24 * Google Author(s): Behdad Esfahbod |
25 */ | 25 */ |
26 | 26 |
27 #include "hb-ot-shape-complex-private.hh" | 27 #include "hb-ot-shape-complex-private.hh" |
28 | 28 |
29 HB_BEGIN_DECLS | |
30 | 29 |
31 | 30 |
32 /* buffer var allocations */ | 31 /* buffer var allocations */ |
33 #define arabic_shaping_action() var2.u32 /* arabic shaping action */ | 32 #define arabic_shaping_action() complex_var_temporary_u16() /* arabic shaping ac
tion */ |
34 | 33 |
35 | 34 |
36 /* | 35 /* |
37 * Bits used in the joining tables | 36 * Bits used in the joining tables |
38 */ | 37 */ |
39 enum { | 38 enum { |
40 JOINING_TYPE_U = 0, | 39 JOINING_TYPE_U = 0, |
41 JOINING_TYPE_R = 1, | 40 JOINING_TYPE_R = 1, |
42 JOINING_TYPE_D = 2, | 41 JOINING_TYPE_D = 2, |
43 JOINING_TYPE_C = JOINING_TYPE_D, | 42 JOINING_TYPE_C = JOINING_TYPE_D, |
44 JOINING_GROUP_ALAPH = 3, | 43 JOINING_GROUP_ALAPH = 3, |
45 JOINING_GROUP_DALATH_RISH = 4, | 44 JOINING_GROUP_DALATH_RISH = 4, |
46 NUM_STATE_MACHINE_COLS = 5, | 45 NUM_STATE_MACHINE_COLS = 5, |
47 | 46 |
48 /* We deliberately don't have a JOINING_TYPE_L since that's unused in Unicode.
*/ | 47 /* We deliberately don't have a JOINING_TYPE_L since that's unused in Unicode.
*/ |
49 | 48 |
50 JOINING_TYPE_T = 6, | 49 JOINING_TYPE_T = 6, |
51 JOINING_TYPE_X = 7 /* means: use general-category to choose between U or T. *
/ | 50 JOINING_TYPE_X = 7 /* means: use general-category to choose between U or T. *
/ |
52 }; | 51 }; |
53 | 52 |
54 /* | 53 /* |
55 * Joining types: | 54 * Joining types: |
56 */ | 55 */ |
57 | 56 |
58 #include "hb-ot-shape-complex-arabic-table.h" | 57 #include "hb-ot-shape-complex-arabic-table.hh" |
59 | 58 |
60 static unsigned int get_joining_type (hb_codepoint_t u, hb_category_t gen_cat) | 59 static unsigned int get_joining_type (hb_codepoint_t u, hb_unicode_general_categ
ory_t gen_cat) |
61 { | 60 { |
62 /* TODO Macroize the magic bit operations */ | 61 /* TODO Macroize the magic bit operations */ |
63 | 62 |
64 if (likely (JOINING_TABLE_FIRST <= u && u <= JOINING_TABLE_LAST)) { | 63 if (likely (hb_in_range<hb_codepoint_t> (u, JOINING_TABLE_FIRST, JOINING_TABLE
_LAST))) { |
65 unsigned int j_type = joining_table[u - JOINING_TABLE_FIRST]; | 64 unsigned int j_type = joining_table[u - JOINING_TABLE_FIRST]; |
66 if (likely (j_type != JOINING_TYPE_X)) | 65 if (likely (j_type != JOINING_TYPE_X)) |
67 return j_type; | 66 return j_type; |
68 } | 67 } |
69 | 68 |
70 /* Mongolian joining data is not in ArabicJoining.txt yet */ | 69 /* Mongolian joining data is not in ArabicJoining.txt yet */ |
71 if (unlikely (0x1800 <= u && u <= 0x18AF)) | 70 if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x1800, 0x18AF))) |
72 { | 71 { |
73 /* All letters, SIBE SYLLABLE BOUNDARY MARKER, and NIRUGU are D */ | 72 /* All letters, SIBE SYLLABLE BOUNDARY MARKER, and NIRUGU are D */ |
74 if (gen_cat == HB_CATEGORY_OTHER_LETTER || u == 0x1807 || u == 0x180A) | 73 if (gen_cat == HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER || u == 0x1807 || u
== 0x180A) |
75 return JOINING_TYPE_D; | 74 return JOINING_TYPE_D; |
76 } | 75 } |
77 | 76 |
78 if (unlikely ((u & ~(0x200C^0x200D)) == 0x200C)) { | 77 if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x200C, 0x200D))) { |
79 return u == 0x200C ? JOINING_TYPE_U : JOINING_TYPE_C; | 78 return u == 0x200C ? JOINING_TYPE_U : JOINING_TYPE_C; |
80 } | 79 } |
81 | 80 |
82 return ((1<<gen_cat) & ((1<<HB_CATEGORY_NON_SPACING_MARK)|(1<<HB_CATEGORY_ENCL
OSING_MARK)|(1<<HB_CATEGORY_FORMAT))) ? | 81 return (FLAG(gen_cat) & (FLAG(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) |
FLAG(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | FLAG(HB_UNICODE_GENERAL_CATEG
ORY_FORMAT))) ? |
83 JOINING_TYPE_T : JOINING_TYPE_U; | 82 JOINING_TYPE_T : JOINING_TYPE_U; |
84 } | 83 } |
85 | 84 |
86 | 85 |
87 | 86 |
88 static const hb_tag_t arabic_syriac_features[] = | 87 static const hb_tag_t arabic_syriac_features[] = |
89 { | 88 { |
90 HB_TAG('i','n','i','t'), | 89 HB_TAG('i','n','i','t'), |
91 HB_TAG('m','e','d','i'), | 90 HB_TAG('m','e','d','i'), |
92 HB_TAG('f','i','n','a'), | 91 HB_TAG('f','i','n','a'), |
(...skipping 21 matching lines...) Expand all Loading... |
114 NONE, | 113 NONE, |
115 | 114 |
116 COMMON_NUM_FEATURES = 4, | 115 COMMON_NUM_FEATURES = 4, |
117 SYRIAC_NUM_FEATURES = 7, | 116 SYRIAC_NUM_FEATURES = 7, |
118 TOTAL_NUM_FEATURES = NONE | 117 TOTAL_NUM_FEATURES = NONE |
119 }; | 118 }; |
120 | 119 |
121 static const struct arabic_state_table_entry { | 120 static const struct arabic_state_table_entry { |
122 uint8_t prev_action; | 121 uint8_t prev_action; |
123 uint8_t curr_action; | 122 uint8_t curr_action; |
124 » uint8_t next_state; | 123 » uint16_t next_state; |
125 » uint8_t padding; | |
126 } arabic_state_table[][NUM_STATE_MACHINE_COLS] = | 124 } arabic_state_table[][NUM_STATE_MACHINE_COLS] = |
127 { | 125 { |
128 /* jt_U, jt_R, jt_D, jg_ALAPH, jg_DALATH_RIS
H */ | 126 /* jt_U, jt_R, jt_D, jg_ALAPH, jg_DALATH_RIS
H */ |
129 | 127 |
130 /* State 0: prev was U, not willing to join. */ | 128 /* State 0: prev was U, not willing to join. */ |
131 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,6}, }
, | 129 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,6}, }
, |
132 | 130 |
133 /* State 1: prev was R or ISOL/ALAPH, not willing to join. */ | 131 /* State 1: prev was R or ISOL/ALAPH, not willing to join. */ |
134 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN2,5}, {NONE,ISOL,6}, }
, | 132 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN2,5}, {NONE,ISOL,6}, }
, |
135 | 133 |
136 /* State 2: prev was D/ISOL, willing to join. */ | 134 /* State 2: prev was D/ISOL, willing to join. */ |
137 { {NONE,NONE,0}, {INIT,FINA,1}, {INIT,FINA,3}, {INIT,FINA,4}, {INIT,FINA,6}, }
, | 135 { {NONE,NONE,0}, {INIT,FINA,1}, {INIT,FINA,3}, {INIT,FINA,4}, {INIT,FINA,6}, }
, |
138 | 136 |
139 /* State 3: prev was D/FINA, willing to join. */ | 137 /* State 3: prev was D/FINA, willing to join. */ |
140 { {NONE,NONE,0}, {MEDI,FINA,1}, {MEDI,FINA,3}, {MEDI,FINA,4}, {MEDI,FINA,6}, }
, | 138 { {NONE,NONE,0}, {MEDI,FINA,1}, {MEDI,FINA,3}, {MEDI,FINA,4}, {MEDI,FINA,6}, }
, |
141 | 139 |
142 /* State 4: prev was FINA ALAPH, not willing to join. */ | 140 /* State 4: prev was FINA ALAPH, not willing to join. */ |
143 { {NONE,NONE,0}, {MED2,ISOL,1}, {MED2,ISOL,2}, {MED2,FIN2,5}, {MED2,ISOL,6}, }
, | 141 { {NONE,NONE,0}, {MED2,ISOL,1}, {MED2,ISOL,2}, {MED2,FIN2,5}, {MED2,ISOL,6}, }
, |
144 | 142 |
145 /* State 5: prev was FIN2/FIN3 ALAPH, not willing to join. */ | 143 /* State 5: prev was FIN2/FIN3 ALAPH, not willing to join. */ |
146 { {NONE,NONE,0}, {ISOL,ISOL,1}, {ISOL,ISOL,2}, {ISOL,FIN2,5}, {ISOL,ISOL,6}, }
, | 144 { {NONE,NONE,0}, {ISOL,ISOL,1}, {ISOL,ISOL,2}, {ISOL,FIN2,5}, {ISOL,ISOL,6}, }
, |
147 | 145 |
148 /* State 6: prev was DALATH/RISH, not willing to join. */ | 146 /* State 6: prev was DALATH/RISH, not willing to join. */ |
149 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN3,5}, {NONE,ISOL,6}, } | 147 { {NONE,NONE,0}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN3,5}, {NONE,ISOL,6}, } |
150 }; | 148 }; |
151 | 149 |
152 | 150 |
153 | 151 |
154 void | 152 void |
155 _hb_ot_shape_complex_collect_features_arabic» (hb_ot_shape_plan_t *plan, const
hb_segment_properties_t *props) | 153 _hb_ot_shape_complex_collect_features_arabic (hb_ot_map_builder_t *map, const hb
_segment_properties_t *props) |
156 { | 154 { |
| 155 /* For Language forms (in ArabicOT speak), we do the iso/fina/medi/init togeth
er, |
| 156 * then rlig and calt each in their own stage. This makes IranNastaliq's ALLA
H |
| 157 * ligature work correctly. It's unfortunate though... |
| 158 * |
| 159 * This also makes Arial Bold in Windows7 work. See: |
| 160 * https://bugzilla.mozilla.org/show_bug.cgi?id=644184 |
| 161 * |
| 162 * TODO: Add test cases for these two. |
| 163 */ |
| 164 |
| 165 map->add_bool_feature (HB_TAG('c','c','m','p')); |
| 166 map->add_bool_feature (HB_TAG('l','o','c','l')); |
| 167 |
| 168 map->add_gsub_pause (NULL, NULL); |
| 169 |
157 unsigned int num_features = props->script == HB_SCRIPT_SYRIAC ? SYRIAC_NUM_FEA
TURES : COMMON_NUM_FEATURES; | 170 unsigned int num_features = props->script == HB_SCRIPT_SYRIAC ? SYRIAC_NUM_FEA
TURES : COMMON_NUM_FEATURES; |
158 for (unsigned int i = 0; i < num_features; i++) | 171 for (unsigned int i = 0; i < num_features; i++) |
159 plan->map.add_bool_feature (arabic_syriac_features[i], false); | 172 map->add_bool_feature (arabic_syriac_features[i], false); |
| 173 |
| 174 map->add_gsub_pause (NULL, NULL); |
| 175 |
| 176 map->add_bool_feature (HB_TAG('r','l','i','g')); |
| 177 map->add_gsub_pause (NULL, NULL); |
| 178 |
| 179 map->add_bool_feature (HB_TAG('c','a','l','t')); |
| 180 map->add_gsub_pause (NULL, NULL); |
| 181 |
| 182 /* ArabicOT spec enables 'cswh' for Arabic where as for basic shaper it's disa
bled by default. */ |
| 183 map->add_bool_feature (HB_TAG('c','s','w','h')); |
| 184 } |
| 185 |
| 186 bool |
| 187 _hb_ot_shape_complex_prefer_decomposed_arabic (void) |
| 188 { |
| 189 return FALSE; |
160 } | 190 } |
161 | 191 |
162 void | 192 void |
163 _hb_ot_shape_complex_setup_masks_arabic»(hb_ot_shape_context_t *c) | 193 _hb_ot_shape_complex_setup_masks_arabic (hb_ot_map_t *map, hb_buffer_t *buffer) |
164 { | 194 { |
165 unsigned int count = c->buffer->len; | 195 unsigned int count = buffer->len; |
166 unsigned int prev = 0, state = 0; | 196 unsigned int prev = 0, state = 0; |
167 | 197 |
| 198 HB_BUFFER_ALLOCATE_VAR (buffer, arabic_shaping_action); |
| 199 |
168 for (unsigned int i = 0; i < count; i++) | 200 for (unsigned int i = 0; i < count; i++) |
169 { | 201 { |
170 unsigned int this_type = get_joining_type (c->buffer->info[i].codepoint, (hb
_category_t) c->buffer->info[i].general_category()); | 202 unsigned int this_type = get_joining_type (buffer->info[i].codepoint, (hb_un
icode_general_category_t) buffer->info[i].general_category()); |
171 | 203 |
172 if (unlikely (this_type == JOINING_TYPE_T)) { | 204 if (unlikely (this_type == JOINING_TYPE_T)) { |
173 c->buffer->info[i].arabic_shaping_action() = NONE; | 205 buffer->info[i].arabic_shaping_action() = NONE; |
174 continue; | 206 continue; |
175 } | 207 } |
176 | 208 |
177 const arabic_state_table_entry *entry = &arabic_state_table[state][this_type
]; | 209 const arabic_state_table_entry *entry = &arabic_state_table[state][this_type
]; |
178 | 210 |
179 if (entry->prev_action != NONE) | 211 if (entry->prev_action != NONE) |
180 c->buffer->info[prev].arabic_shaping_action() = entry->prev_action; | 212 buffer->info[prev].arabic_shaping_action() = entry->prev_action; |
181 | 213 |
182 c->buffer->info[i].arabic_shaping_action() = entry->curr_action; | 214 buffer->info[i].arabic_shaping_action() = entry->curr_action; |
183 | 215 |
184 prev = i; | 216 prev = i; |
185 state = entry->next_state; | 217 state = entry->next_state; |
186 } | 218 } |
187 | 219 |
188 hb_mask_t mask_array[TOTAL_NUM_FEATURES + 1] = {0}; | 220 hb_mask_t mask_array[TOTAL_NUM_FEATURES + 1] = {0}; |
189 unsigned int num_masks = c->buffer->props.script == HB_SCRIPT_SYRIAC ? SYRIAC_
NUM_FEATURES : COMMON_NUM_FEATURES; | 221 unsigned int num_masks = buffer->props.script == HB_SCRIPT_SYRIAC ? SYRIAC_NUM
_FEATURES : COMMON_NUM_FEATURES; |
190 for (unsigned int i = 0; i < num_masks; i++) | 222 for (unsigned int i = 0; i < num_masks; i++) |
191 mask_array[i] = c->plan->map.get_1_mask (arabic_syriac_features[i]); | 223 mask_array[i] = map->get_1_mask (arabic_syriac_features[i]); |
192 | 224 |
193 for (unsigned int i = 0; i < count; i++) | 225 for (unsigned int i = 0; i < count; i++) |
194 c->buffer->info[i].mask |= mask_array[c->buffer->info[i].arabic_shaping_acti
on()]; | 226 buffer->info[i].mask |= mask_array[buffer->info[i].arabic_shaping_action()]; |
| 227 |
| 228 HB_BUFFER_DEALLOCATE_VAR (buffer, arabic_shaping_action); |
195 } | 229 } |
196 | 230 |
197 | 231 |
198 HB_END_DECLS | |
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