hb-ot-layout-gsub-table.hh (3697B)
1 /* 2 * Copyright © 2007,2008,2009,2010 Red Hat, Inc. 3 * Copyright © 2010,2012,2013 Google, Inc. 4 * 5 * This is part of HarfBuzz, a text shaping library. 6 * 7 * Permission is hereby granted, without written agreement and without 8 * license or royalty fees, to use, copy, modify, and distribute this 9 * software and its documentation for any purpose, provided that the 10 * above copyright notice and the following two paragraphs appear in 11 * all copies of this software. 12 * 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 17 * DAMAGE. 18 * 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 24 * 25 * Red Hat Author(s): Behdad Esfahbod 26 * Google Author(s): Behdad Esfahbod 27 */ 28 29 #ifndef HB_OT_LAYOUT_GSUB_TABLE_HH 30 #define HB_OT_LAYOUT_GSUB_TABLE_HH 31 32 #include "OT/Layout/GSUB/GSUB.hh" 33 34 namespace OT { 35 namespace Layout { 36 namespace GSUB_impl { 37 38 // TODO(garretrieger): Move into the new layout directory. 39 /* Out-of-class implementation for methods recursing */ 40 41 #ifndef HB_NO_OT_LAYOUT 42 /*static*/ inline bool ExtensionSubst::is_reverse () const 43 { 44 return SubstLookup::lookup_type_is_reverse (get_type ()); 45 } 46 template <typename context_t> 47 /*static*/ typename context_t::return_t SubstLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index) 48 { 49 const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (lookup_index); 50 return l.dispatch (c); 51 } 52 53 /*static*/ typename hb_closure_context_t::return_t SubstLookup::closure_glyphs_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index) 54 { 55 const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (lookup_index); 56 if (l.may_have_non_1to1 ()) 57 hb_set_add_range (covered_seq_indices, seq_index, end_index); 58 return l.dispatch (c); 59 } 60 61 template <> 62 inline hb_closure_lookups_context_t::return_t 63 SubstLookup::dispatch_recurse_func<hb_closure_lookups_context_t> (hb_closure_lookups_context_t *c, unsigned this_index) 64 { 65 const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (this_index); 66 return l.closure_lookups (c, this_index); 67 } 68 69 template <> 70 inline bool SubstLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index) 71 { 72 auto *gsub = c->face->table.GSUB.get_relaxed (); 73 const SubstLookup &l = gsub->table->get_lookup (lookup_index); 74 unsigned int saved_lookup_props = c->lookup_props; 75 unsigned int saved_lookup_index = c->lookup_index; 76 c->set_lookup_index (lookup_index); 77 c->set_lookup_props (l.get_props ()); 78 79 uint32_t stack_match_positions[8]; 80 hb_vector_t<uint32_t> saved_match_positions; 81 saved_match_positions.set_storage (stack_match_positions); 82 hb_swap (c->match_positions, saved_match_positions); 83 84 bool ret = false; 85 auto *accel = gsub->get_accel (lookup_index); 86 ret = accel && accel->apply (c, false); 87 88 c->set_lookup_index (saved_lookup_index); 89 c->set_lookup_props (saved_lookup_props); 90 91 hb_swap (c->match_positions, saved_match_positions); 92 93 return ret; 94 } 95 #endif 96 97 } /* namespace GSUB_impl */ 98 } /* namespace Layout */ 99 } /* namespace OT */ 100 101 102 #endif /* HB_OT_LAYOUT_GSUB_TABLE_HH */