116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
/*
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* Copyright © 2007,2008,2009,2010 Red Hat, Inc.
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* Copyright © 2010,2012,2013 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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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_LAYOUT_GPOS_TABLE_HH
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#define HB_OT_LAYOUT_GPOS_TABLE_HH
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#include "OT/Layout/GPOS/GPOS.hh"
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namespace OT {
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using Layout::GPOS::PosLookup;
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using OT::Layout::GPOS::ATTACH_TYPE_NONE;
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using OT::Layout::GPOS::ATTACH_TYPE_MARK;
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using OT::Layout::GPOS::ATTACH_TYPE_CURSIVE;
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// struct MarkArray;
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// static void Markclass_closure_and_remap_indexes (const Coverage &mark_coverage,
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// const MarkArray &mark_array,
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// const hb_set_t &glyphset,
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// hb_map_t* klass_mapping /* INOUT */);
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/* Shared Tables: ValueRecord, Anchor Table, and MarkArray */
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/* Lookups */
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static void
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reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction, unsigned int new_parent)
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{
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int chain = pos[i].attach_chain(), type = pos[i].attach_type();
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if (likely (!chain || 0 == (type & OT::Layout::GPOS::ATTACH_TYPE_CURSIVE)))
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return;
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pos[i].attach_chain() = 0;
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unsigned int j = (int) i + chain;
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/* Stop if we see new parent in the chain. */
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if (j == new_parent)
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return;
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reverse_cursive_minor_offset (pos, j, direction, new_parent);
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if (HB_DIRECTION_IS_HORIZONTAL (direction))
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pos[j].y_offset = -pos[i].y_offset;
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else
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pos[j].x_offset = -pos[i].x_offset;
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pos[j].attach_chain() = -chain;
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pos[j].attach_type() = type;
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}
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// TODO(garretrieger): Move into new layout directory.
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/* Out-of-class implementation for methods recursing */
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#ifndef HB_NO_OT_LAYOUT
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template <typename context_t>
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/*static*/ typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
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{
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const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (lookup_index);
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return l.dispatch (c);
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}
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template <>
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inline hb_closure_lookups_context_t::return_t
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PosLookup::dispatch_recurse_func<hb_closure_lookups_context_t> (hb_closure_lookups_context_t *c, unsigned this_index)
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{
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const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (this_index);
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return l.closure_lookups (c, this_index);
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}
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template <>
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inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index)
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{
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const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (lookup_index);
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unsigned int saved_lookup_props = c->lookup_props;
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unsigned int saved_lookup_index = c->lookup_index;
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c->set_lookup_index (lookup_index);
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c->set_lookup_props (l.get_props ());
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bool ret = l.dispatch (c);
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c->set_lookup_index (saved_lookup_index);
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c->set_lookup_props (saved_lookup_props);
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return ret;
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}
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#endif
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} /* namespace OT */
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#endif /* HB_OT_LAYOUT_GPOS_TABLE_HH */
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