10 * all copies of this software. 11 * 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 16 * DAMAGE. 17 * 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. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #ifndef HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH 28 #define HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH 29 30 #include "hb-private.hh" 31 32 #include "hb-ot-shape-private.hh" 33 #include "hb-ot-layout-gsub-table.hh" 34 35 36 /* Features ordered the same as the entries in shaping_table rows, 37 * followed by rlig. Don't change. */ 38 static const hb_tag_t arabic_fallback_features[] = 39 { 40 HB_TAG('i','n','i','t'), 41 HB_TAG('m','e','d','i'), 42 HB_TAG('f','i','n','a'), 43 HB_TAG('i','s','o','l'), 44 HB_TAG('r','l','i','g'), 45 }; 46 47 static OT::SubstLookup * 48 arabic_fallback_synthesize_lookup_single (const hb_ot_shape_plan_t *plan HB_UNUSED, 49 hb_font_t *font, 50 unsigned int feature_index) 51 { 52 OT::GlyphID glyphs[SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1]; 62 if (!s || 63 !hb_font_get_glyph (font, u, 0, &u_glyph) || 64 !hb_font_get_glyph (font, s, 0, &s_glyph) || 65 u_glyph == s_glyph || 66 u_glyph > 0xFFFFu || s_glyph > 0xFFFFu) 67 continue; 68 69 glyphs[num_glyphs].set (u_glyph); 70 substitutes[num_glyphs].set (s_glyph); 71 72 num_glyphs++; 73 } 74 75 if (!num_glyphs) 76 return nullptr; 77 78 /* Bubble-sort or something equally good! 79 * May not be good-enough for presidential candidate interviews, but good-enough for us... */ 80 hb_stable_sort (&glyphs[0], num_glyphs, (int(*)(const OT::GlyphID*, const OT::GlyphID *)) OT::GlyphID::cmp, &substitutes[0]); 81 82 OT::Supplier<OT::GlyphID> glyphs_supplier (glyphs, num_glyphs); 83 OT::Supplier<OT::GlyphID> substitutes_supplier (substitutes, num_glyphs); 84 85 /* Each glyph takes four bytes max, and there's some overhead. */ 86 char buf[(SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1) * 4 + 128]; 87 OT::hb_serialize_context_t c (buf, sizeof (buf)); 88 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); 89 bool ret = lookup->serialize_single (&c, 90 OT::LookupFlag::IgnoreMarks, 91 glyphs_supplier, 92 substitutes_supplier, 93 num_glyphs); 94 c.end_serialize (); 95 /* TODO sanitize the results? */ 96 97 return ret ? c.copy<OT::SubstLookup> () : nullptr; 98 } 99 100 static OT::SubstLookup * 101 arabic_fallback_synthesize_lookup_ligature (const hb_ot_shape_plan_t *plan HB_UNUSED, 102 hb_font_t *font) 103 { 104 OT::GlyphID first_glyphs[ARRAY_LENGTH_CONST (ligature_table)]; 105 unsigned int first_glyphs_indirection[ARRAY_LENGTH_CONST (ligature_table)]; 106 unsigned int ligature_per_first_glyph_count_list[ARRAY_LENGTH_CONST (first_glyphs)]; 107 unsigned int num_first_glyphs = 0; 108 109 /* We know that all our ligatures are 2-component */ 110 OT::GlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)]; 111 unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)]; 112 OT::GlyphID component_list[ARRAY_LENGTH_CONST (ligature_list) * 1/* One extra component per ligature */]; 113 unsigned int num_ligatures = 0; 138 hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second; 139 hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature; 140 hb_codepoint_t second_glyph, ligature_glyph; 141 if (!second_u || 142 !hb_font_get_glyph (font, second_u, 0, &second_glyph) || 143 !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph)) 144 continue; 145 146 ligature_per_first_glyph_count_list[i]++; 147 148 ligature_list[num_ligatures].set (ligature_glyph); 149 component_count_list[num_ligatures] = 2; 150 component_list[num_ligatures].set (second_glyph); 151 num_ligatures++; 152 } 153 } 154 155 if (!num_ligatures) 156 return nullptr; 157 158 OT::Supplier<OT::GlyphID> first_glyphs_supplier (first_glyphs, num_first_glyphs); 159 OT::Supplier<unsigned int > ligature_per_first_glyph_count_supplier (ligature_per_first_glyph_count_list, num_first_glyphs); 160 OT::Supplier<OT::GlyphID> ligatures_supplier (ligature_list, num_ligatures); 161 OT::Supplier<unsigned int > component_count_supplier (component_count_list, num_ligatures); 162 OT::Supplier<OT::GlyphID> component_supplier (component_list, num_ligatures); 163 164 /* 16 bytes per ligature ought to be enough... */ 165 char buf[ARRAY_LENGTH_CONST (ligature_list) * 16 + 128]; 166 OT::hb_serialize_context_t c (buf, sizeof (buf)); 167 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); 168 bool ret = lookup->serialize_ligature (&c, 169 OT::LookupFlag::IgnoreMarks, 170 first_glyphs_supplier, 171 ligature_per_first_glyph_count_supplier, 172 num_first_glyphs, 173 ligatures_supplier, 174 component_count_supplier, 175 component_supplier); 176 177 c.end_serialize (); 178 /* TODO sanitize the results? */ 179 180 return ret ? c.copy<OT::SubstLookup> () : nullptr; 181 } 182 183 static OT::SubstLookup * 184 arabic_fallback_synthesize_lookup (const hb_ot_shape_plan_t *plan, 185 hb_font_t *font, 186 unsigned int feature_index) 187 { 188 if (feature_index < 4) 189 return arabic_fallback_synthesize_lookup_single (plan, font, feature_index); 190 else 191 return arabic_fallback_synthesize_lookup_ligature (plan, font); 192 } 193 194 #define ARABIC_FALLBACK_MAX_LOOKUPS 5 195 196 struct arabic_fallback_plan_t 197 { 198 ASSERT_POD (); 199 200 unsigned int num_lookups; 201 bool free_lookups; 202 203 hb_mask_t mask_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 204 OT::SubstLookup *lookup_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 205 hb_ot_layout_lookup_accelerator_t accel_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 206 }; 207 208 static const arabic_fallback_plan_t arabic_fallback_plan_nil = {}; 209 210 #if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(HB_NO_WIN1256) 211 #define HB_WITH_WIN1256 212 #endif 213 214 #ifdef HB_WITH_WIN1256 215 #include "hb-ot-shape-complex-arabic-win1256.hh" 216 #endif 217 218 struct ManifestLookup { 219 OT::Tag tag; 220 OT::OffsetTo<OT::SubstLookup> lookupOffset; 221 }; 222 typedef OT::ArrayOf<ManifestLookup> Manifest; 223 224 static bool 225 arabic_fallback_plan_init_win1256 (arabic_fallback_plan_t *fallback_plan, 226 const hb_ot_shape_plan_t *plan, 227 hb_font_t *font) 228 { 229 #ifdef HB_WITH_WIN1256 230 /* Does this font look like it's Windows-1256-encoded? */ 231 hb_codepoint_t g; 232 if (!(hb_font_get_glyph (font, 0x0627u, 0, &g) && g == 199 /* ALEF */ && 233 hb_font_get_glyph (font, 0x0644u, 0, &g) && g == 225 /* LAM */ && 234 hb_font_get_glyph (font, 0x0649u, 0, &g) && g == 236 /* ALEF MAKSURA */ && 235 hb_font_get_glyph (font, 0x064Au, 0, &g) && g == 237 /* YEH */ && 236 hb_font_get_glyph (font, 0x0652u, 0, &g) && g == 250 /* SUKUN */)) 237 return false; 238 239 const Manifest &manifest = reinterpret_cast<const Manifest&> (arabic_win1256_gsub_lookups.manifest); 240 static_assert (sizeof (arabic_win1256_gsub_lookups.manifestData) / sizeof (ManifestLookup) 241 <= ARABIC_FALLBACK_MAX_LOOKUPS, ""); 242 /* TODO sanitize the table? */ 243 244 unsigned j = 0; 245 unsigned int count = manifest.len; 246 for (unsigned int i = 0; i < count; i++) 247 { 282 if (fallback_plan->lookup_array[j]) 283 { 284 fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]); 285 j++; 286 } 287 } 288 } 289 290 fallback_plan->num_lookups = j; 291 fallback_plan->free_lookups = true; 292 293 return j > 0; 294 } 295 296 static arabic_fallback_plan_t * 297 arabic_fallback_plan_create (const hb_ot_shape_plan_t *plan, 298 hb_font_t *font) 299 { 300 arabic_fallback_plan_t *fallback_plan = (arabic_fallback_plan_t *) calloc (1, sizeof (arabic_fallback_plan_t)); 301 if (unlikely (!fallback_plan)) 302 return const_cast<arabic_fallback_plan_t *> (&arabic_fallback_plan_nil); 303 304 fallback_plan->num_lookups = 0; 305 fallback_plan->free_lookups = false; 306 307 /* Try synthesizing GSUB table using Unicode Arabic Presentation Forms, 308 * in case the font has cmap entries for the presentation-forms characters. */ 309 if (arabic_fallback_plan_init_unicode (fallback_plan, plan, font)) 310 return fallback_plan; 311 312 /* See if this looks like a Windows-1256-encoded font. If it does, use a 313 * hand-coded GSUB table. */ 314 if (arabic_fallback_plan_init_win1256 (fallback_plan, plan, font)) 315 return fallback_plan; 316 317 free (fallback_plan); 318 return const_cast<arabic_fallback_plan_t *> (&arabic_fallback_plan_nil); 319 } 320 321 static void 322 arabic_fallback_plan_destroy (arabic_fallback_plan_t *fallback_plan) 323 { 324 if (!fallback_plan || fallback_plan == &arabic_fallback_plan_nil) 325 return; 326 327 for (unsigned int i = 0; i < fallback_plan->num_lookups; i++) 328 if (fallback_plan->lookup_array[i]) 329 { 330 fallback_plan->accel_array[i].fini (); 331 if (fallback_plan->free_lookups) 332 free (fallback_plan->lookup_array[i]); 333 } 334 335 free (fallback_plan); 336 } 337 338 static void 339 arabic_fallback_plan_shape (arabic_fallback_plan_t *fallback_plan, 340 hb_font_t *font, 341 hb_buffer_t *buffer) 342 { 343 OT::hb_ot_apply_context_t c (0, font, buffer); 344 for (unsigned int i = 0; i < fallback_plan->num_lookups; i++) | 10 * all copies of this software. 11 * 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 16 * DAMAGE. 17 * 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. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #ifndef HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH 28 #define HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH 29 30 #include "hb.hh" 31 32 #include "hb-ot-shape.hh" 33 #include "hb-ot-layout-gsub-table.hh" 34 35 36 /* Features ordered the same as the entries in shaping_table rows, 37 * followed by rlig. Don't change. */ 38 static const hb_tag_t arabic_fallback_features[] = 39 { 40 HB_TAG('i','n','i','t'), 41 HB_TAG('m','e','d','i'), 42 HB_TAG('f','i','n','a'), 43 HB_TAG('i','s','o','l'), 44 HB_TAG('r','l','i','g'), 45 }; 46 47 static OT::SubstLookup * 48 arabic_fallback_synthesize_lookup_single (const hb_ot_shape_plan_t *plan HB_UNUSED, 49 hb_font_t *font, 50 unsigned int feature_index) 51 { 52 OT::GlyphID glyphs[SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1]; 62 if (!s || 63 !hb_font_get_glyph (font, u, 0, &u_glyph) || 64 !hb_font_get_glyph (font, s, 0, &s_glyph) || 65 u_glyph == s_glyph || 66 u_glyph > 0xFFFFu || s_glyph > 0xFFFFu) 67 continue; 68 69 glyphs[num_glyphs].set (u_glyph); 70 substitutes[num_glyphs].set (s_glyph); 71 72 num_glyphs++; 73 } 74 75 if (!num_glyphs) 76 return nullptr; 77 78 /* Bubble-sort or something equally good! 79 * May not be good-enough for presidential candidate interviews, but good-enough for us... */ 80 hb_stable_sort (&glyphs[0], num_glyphs, (int(*)(const OT::GlyphID*, const OT::GlyphID *)) OT::GlyphID::cmp, &substitutes[0]); 81 82 83 /* Each glyph takes four bytes max, and there's some overhead. */ 84 char buf[(SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1) * 4 + 128]; 85 hb_serialize_context_t c (buf, sizeof (buf)); 86 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); 87 bool ret = lookup->serialize_single (&c, 88 OT::LookupFlag::IgnoreMarks, 89 hb_array (glyphs, num_glyphs), 90 hb_array (substitutes, num_glyphs)); 91 c.end_serialize (); 92 /* TODO sanitize the results? */ 93 94 return ret ? c.copy<OT::SubstLookup> () : nullptr; 95 } 96 97 static OT::SubstLookup * 98 arabic_fallback_synthesize_lookup_ligature (const hb_ot_shape_plan_t *plan HB_UNUSED, 99 hb_font_t *font) 100 { 101 OT::GlyphID first_glyphs[ARRAY_LENGTH_CONST (ligature_table)]; 102 unsigned int first_glyphs_indirection[ARRAY_LENGTH_CONST (ligature_table)]; 103 unsigned int ligature_per_first_glyph_count_list[ARRAY_LENGTH_CONST (first_glyphs)]; 104 unsigned int num_first_glyphs = 0; 105 106 /* We know that all our ligatures are 2-component */ 107 OT::GlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)]; 108 unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)]; 109 OT::GlyphID component_list[ARRAY_LENGTH_CONST (ligature_list) * 1/* One extra component per ligature */]; 110 unsigned int num_ligatures = 0; 135 hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second; 136 hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature; 137 hb_codepoint_t second_glyph, ligature_glyph; 138 if (!second_u || 139 !hb_font_get_glyph (font, second_u, 0, &second_glyph) || 140 !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph)) 141 continue; 142 143 ligature_per_first_glyph_count_list[i]++; 144 145 ligature_list[num_ligatures].set (ligature_glyph); 146 component_count_list[num_ligatures] = 2; 147 component_list[num_ligatures].set (second_glyph); 148 num_ligatures++; 149 } 150 } 151 152 if (!num_ligatures) 153 return nullptr; 154 155 156 /* 16 bytes per ligature ought to be enough... */ 157 char buf[ARRAY_LENGTH_CONST (ligature_list) * 16 + 128]; 158 hb_serialize_context_t c (buf, sizeof (buf)); 159 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); 160 bool ret = lookup->serialize_ligature (&c, 161 OT::LookupFlag::IgnoreMarks, 162 hb_array (first_glyphs, num_first_glyphs), 163 hb_array (ligature_per_first_glyph_count_list, num_first_glyphs), 164 hb_array (ligature_list, num_ligatures), 165 hb_array (component_count_list, num_ligatures), 166 hb_array (component_list, num_ligatures)); 167 c.end_serialize (); 168 /* TODO sanitize the results? */ 169 170 return ret ? c.copy<OT::SubstLookup> () : nullptr; 171 } 172 173 static OT::SubstLookup * 174 arabic_fallback_synthesize_lookup (const hb_ot_shape_plan_t *plan, 175 hb_font_t *font, 176 unsigned int feature_index) 177 { 178 if (feature_index < 4) 179 return arabic_fallback_synthesize_lookup_single (plan, font, feature_index); 180 else 181 return arabic_fallback_synthesize_lookup_ligature (plan, font); 182 } 183 184 #define ARABIC_FALLBACK_MAX_LOOKUPS 5 185 186 struct arabic_fallback_plan_t 187 { 188 unsigned int num_lookups; 189 bool free_lookups; 190 191 hb_mask_t mask_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 192 OT::SubstLookup *lookup_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 193 OT::hb_ot_layout_lookup_accelerator_t accel_array[ARABIC_FALLBACK_MAX_LOOKUPS]; 194 }; 195 196 #if defined(_WIN32) && !defined(HB_NO_WIN1256) 197 #define HB_WITH_WIN1256 198 #endif 199 200 #ifdef HB_WITH_WIN1256 201 #include "hb-ot-shape-complex-arabic-win1256.hh" 202 #endif 203 204 struct ManifestLookup 205 { 206 public: 207 OT::Tag tag; 208 OT::OffsetTo<OT::SubstLookup> lookupOffset; 209 public: 210 DEFINE_SIZE_STATIC (6); 211 }; 212 typedef OT::ArrayOf<ManifestLookup> Manifest; 213 214 static bool 215 arabic_fallback_plan_init_win1256 (arabic_fallback_plan_t *fallback_plan HB_UNUSED, 216 const hb_ot_shape_plan_t *plan HB_UNUSED, 217 hb_font_t *font HB_UNUSED) 218 { 219 #ifdef HB_WITH_WIN1256 220 /* Does this font look like it's Windows-1256-encoded? */ 221 hb_codepoint_t g; 222 if (!(hb_font_get_glyph (font, 0x0627u, 0, &g) && g == 199 /* ALEF */ && 223 hb_font_get_glyph (font, 0x0644u, 0, &g) && g == 225 /* LAM */ && 224 hb_font_get_glyph (font, 0x0649u, 0, &g) && g == 236 /* ALEF MAKSURA */ && 225 hb_font_get_glyph (font, 0x064Au, 0, &g) && g == 237 /* YEH */ && 226 hb_font_get_glyph (font, 0x0652u, 0, &g) && g == 250 /* SUKUN */)) 227 return false; 228 229 const Manifest &manifest = reinterpret_cast<const Manifest&> (arabic_win1256_gsub_lookups.manifest); 230 static_assert (sizeof (arabic_win1256_gsub_lookups.manifestData) / sizeof (ManifestLookup) 231 <= ARABIC_FALLBACK_MAX_LOOKUPS, ""); 232 /* TODO sanitize the table? */ 233 234 unsigned j = 0; 235 unsigned int count = manifest.len; 236 for (unsigned int i = 0; i < count; i++) 237 { 272 if (fallback_plan->lookup_array[j]) 273 { 274 fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]); 275 j++; 276 } 277 } 278 } 279 280 fallback_plan->num_lookups = j; 281 fallback_plan->free_lookups = true; 282 283 return j > 0; 284 } 285 286 static arabic_fallback_plan_t * 287 arabic_fallback_plan_create (const hb_ot_shape_plan_t *plan, 288 hb_font_t *font) 289 { 290 arabic_fallback_plan_t *fallback_plan = (arabic_fallback_plan_t *) calloc (1, sizeof (arabic_fallback_plan_t)); 291 if (unlikely (!fallback_plan)) 292 return const_cast<arabic_fallback_plan_t *> (&Null(arabic_fallback_plan_t)); 293 294 fallback_plan->num_lookups = 0; 295 fallback_plan->free_lookups = false; 296 297 /* Try synthesizing GSUB table using Unicode Arabic Presentation Forms, 298 * in case the font has cmap entries for the presentation-forms characters. */ 299 if (arabic_fallback_plan_init_unicode (fallback_plan, plan, font)) 300 return fallback_plan; 301 302 /* See if this looks like a Windows-1256-encoded font. If it does, use a 303 * hand-coded GSUB table. */ 304 if (arabic_fallback_plan_init_win1256 (fallback_plan, plan, font)) 305 return fallback_plan; 306 307 assert (fallback_plan->num_lookups == 0); 308 free (fallback_plan); 309 return const_cast<arabic_fallback_plan_t *> (&Null(arabic_fallback_plan_t)); 310 } 311 312 static void 313 arabic_fallback_plan_destroy (arabic_fallback_plan_t *fallback_plan) 314 { 315 if (!fallback_plan || fallback_plan->num_lookups == 0) 316 return; 317 318 for (unsigned int i = 0; i < fallback_plan->num_lookups; i++) 319 if (fallback_plan->lookup_array[i]) 320 { 321 fallback_plan->accel_array[i].fini (); 322 if (fallback_plan->free_lookups) 323 free (fallback_plan->lookup_array[i]); 324 } 325 326 free (fallback_plan); 327 } 328 329 static void 330 arabic_fallback_plan_shape (arabic_fallback_plan_t *fallback_plan, 331 hb_font_t *font, 332 hb_buffer_t *buffer) 333 { 334 OT::hb_ot_apply_context_t c (0, font, buffer); 335 for (unsigned int i = 0; i < fallback_plan->num_lookups; i++) |