hb-ot-layout-gpos-table.hh (3122B)
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_GPOS_TABLE_HH 30 #define HB_OT_LAYOUT_GPOS_TABLE_HH 31 32 #include "OT/Layout/GPOS/GPOS.hh" 33 34 namespace OT { 35 namespace Layout { 36 namespace GPOS_impl { 37 38 // TODO(garretrieger): Move into new layout directory. 39 /* Out-of-class implementation for methods recursing */ 40 #ifndef HB_NO_OT_LAYOUT 41 template <typename context_t> 42 /*static*/ typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index) 43 { 44 const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (lookup_index); 45 return l.dispatch (c); 46 } 47 48 template <> 49 inline hb_closure_lookups_context_t::return_t 50 PosLookup::dispatch_recurse_func<hb_closure_lookups_context_t> (hb_closure_lookups_context_t *c, unsigned this_index) 51 { 52 const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (this_index); 53 return l.closure_lookups (c, this_index); 54 } 55 56 template <> 57 inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index) 58 { 59 auto *gpos = c->face->table.GPOS.get_relaxed (); 60 const PosLookup &l = gpos->table->get_lookup (lookup_index); 61 unsigned int saved_lookup_props = c->lookup_props; 62 unsigned int saved_lookup_index = c->lookup_index; 63 c->set_lookup_index (lookup_index); 64 c->set_lookup_props (l.get_props ()); 65 66 uint32_t stack_match_positions[8]; 67 hb_vector_t<uint32_t> saved_match_positions; 68 saved_match_positions.set_storage (stack_match_positions); 69 hb_swap (c->match_positions, saved_match_positions); 70 71 bool ret = false; 72 auto *accel = gpos->get_accel (lookup_index); 73 ret = accel && accel->apply (c, false); 74 75 c->set_lookup_index (saved_lookup_index); 76 c->set_lookup_props (saved_lookup_props); 77 78 hb_swap (c->match_positions, saved_match_positions); 79 80 return ret; 81 } 82 #endif 83 84 } /* namespace GPOS_impl */ 85 } /* namespace Layout */ 86 } /* namespace OT */ 87 88 89 #endif /* HB_OT_LAYOUT_GPOS_TABLE_HH */