--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-layout-gsub-table.hh Mon Nov 23 09:58:44 2015 -0800
@@ -0,0 +1,1342 @@
+/*
+ * Copyright © 2007,2008,2009,2010 Red Hat, Inc.
+ * Copyright © 2010,2012,2013 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_LAYOUT_GSUB_TABLE_HH
+#define HB_OT_LAYOUT_GSUB_TABLE_HH
+
+#include "hb-ot-layout-gsubgpos-private.hh"
+
+
+namespace OT {
+
+
+struct SingleSubstFormat1
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ hb_codepoint_t glyph_id = iter.get_glyph ();
+ if (c->glyphs->has (glyph_id))
+ c->glyphs->add ((glyph_id + deltaGlyphID) & 0xFFFFu);
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ hb_codepoint_t glyph_id = iter.get_glyph ();
+ c->input->add (glyph_id);
+ c->output->add ((glyph_id + deltaGlyphID) & 0xFFFFu);
+ }
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
+ unsigned int index = (this+coverage).get_coverage (glyph_id);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ /* According to the Adobe Annotated OpenType Suite, result is always
+ * limited to 16bit. */
+ glyph_id = (glyph_id + deltaGlyphID) & 0xFFFFu;
+ c->replace_glyph (glyph_id);
+
+ return_trace (true);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ unsigned int num_glyphs,
+ int delta)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ deltaGlyphID.set (delta); /* TODO(serilaize) overflow? */
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (coverage.sanitize (c, this) && deltaGlyphID.sanitize (c));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 1 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ SHORT deltaGlyphID; /* Add to original GlyphID to get
+ * substitute GlyphID */
+ public:
+ DEFINE_SIZE_STATIC (6);
+};
+
+struct SingleSubstFormat2
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ if (c->glyphs->has (iter.get_glyph ()))
+ c->glyphs->add (substitute[iter.get_coverage ()]);
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ c->input->add (iter.get_glyph ());
+ c->output->add (substitute[iter.get_coverage ()]);
+ }
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
+ unsigned int index = (this+coverage).get_coverage (glyph_id);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ if (unlikely (index >= substitute.len)) return_trace (false);
+
+ glyph_id = substitute[index];
+ c->replace_glyph (glyph_id);
+
+ return_trace (true);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<GlyphID> &substitutes,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!substitute.serialize (c, substitutes, num_glyphs))) return_trace (false);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (coverage.sanitize (c, this) && substitute.sanitize (c));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 2 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ ArrayOf<GlyphID>
+ substitute; /* Array of substitute
+ * GlyphIDs--ordered by Coverage Index */
+ public:
+ DEFINE_SIZE_ARRAY (6, substitute);
+};
+
+struct SingleSubst
+{
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<GlyphID> &substitutes,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
+ unsigned int format = 2;
+ int delta = 0;
+ if (num_glyphs) {
+ format = 1;
+ /* TODO(serialize) check for wrap-around */
+ delta = substitutes[0] - glyphs[0];
+ for (unsigned int i = 1; i < num_glyphs; i++)
+ if (delta != substitutes[i] - glyphs[i]) {
+ format = 2;
+ break;
+ }
+ }
+ u.format.set (format);
+ switch (u.format) {
+ case 1: return_trace (u.format1.serialize (c, glyphs, num_glyphs, delta));
+ case 2: return_trace (u.format2.serialize (c, glyphs, substitutes, num_glyphs));
+ default:return_trace (false);
+ }
+ }
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
+ switch (u.format) {
+ case 1: return_trace (c->dispatch (u.format1));
+ case 2: return_trace (c->dispatch (u.format2));
+ default:return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ SingleSubstFormat1 format1;
+ SingleSubstFormat2 format2;
+ } u;
+};
+
+
+struct Sequence
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ unsigned int count = substitute.len;
+ for (unsigned int i = 0; i < count; i++)
+ c->glyphs->add (substitute[i]);
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ unsigned int count = substitute.len;
+ for (unsigned int i = 0; i < count; i++)
+ c->output->add (substitute[i]);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ unsigned int count = substitute.len;
+
+ /* TODO:
+ * Testing shows that Uniscribe actually allows zero-len susbstitute,
+ * which essentially deletes a glyph. We don't allow for now. It
+ * can be confusing to the client since the cluster from the deleted
+ * glyph won't be merged with any output cluster... Also, currently
+ * buffer->move_to() makes assumptions about this too. Perhaps fix
+ * in the future after figuring out what to do with the clusters.
+ */
+ if (unlikely (!count)) return_trace (false);
+
+ /* Special-case to make it in-place and not consider this
+ * as a "multiplied" substitution. */
+ if (unlikely (count == 1))
+ {
+ c->replace_glyph (substitute.array[0]);
+ return_trace (true);
+ }
+
+ unsigned int klass = _hb_glyph_info_is_ligature (&c->buffer->cur()) ?
+ HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0;
+
+ for (unsigned int i = 0; i < count; i++) {
+ _hb_glyph_info_set_lig_props_for_component (&c->buffer->cur(), i);
+ c->output_glyph_for_component (substitute.array[i], klass);
+ }
+ c->buffer->skip_glyph ();
+
+ return_trace (true);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!substitute.serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (substitute.sanitize (c));
+ }
+
+ protected:
+ ArrayOf<GlyphID>
+ substitute; /* String of GlyphIDs to substitute */
+ public:
+ DEFINE_SIZE_ARRAY (2, substitute);
+};
+
+struct MultipleSubstFormat1
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ if (c->glyphs->has (iter.get_glyph ()))
+ (this+sequence[iter.get_coverage ()]).closure (c);
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ (this+coverage).add_coverage (c->input);
+ unsigned int count = sequence.len;
+ for (unsigned int i = 0; i < count; i++)
+ (this+sequence[i]).collect_glyphs (c);
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+
+ unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ return_trace ((this+sequence[index]).apply (c));
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &substitute_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &substitute_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!sequence.serialize (c, num_glyphs))) return_trace (false);
+ for (unsigned int i = 0; i < num_glyphs; i++)
+ if (unlikely (!sequence[i].serialize (c, this).serialize (c,
+ substitute_glyphs_list,
+ substitute_len_list[i]))) return_trace (false);
+ substitute_len_list.advance (num_glyphs);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (coverage.sanitize (c, this) && sequence.sanitize (c, this));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 1 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ OffsetArrayOf<Sequence>
+ sequence; /* Array of Sequence tables
+ * ordered by Coverage Index */
+ public:
+ DEFINE_SIZE_ARRAY (6, sequence);
+};
+
+struct MultipleSubst
+{
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &substitute_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &substitute_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
+ unsigned int format = 1;
+ u.format.set (format);
+ switch (u.format) {
+ case 1: return_trace (u.format1.serialize (c, glyphs, substitute_len_list, num_glyphs, substitute_glyphs_list));
+ default:return_trace (false);
+ }
+ }
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
+ switch (u.format) {
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ MultipleSubstFormat1 format1;
+ } u;
+};
+
+
+typedef ArrayOf<GlyphID> AlternateSet; /* Array of alternate GlyphIDs--in
+ * arbitrary order */
+
+struct AlternateSubstFormat1
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ if (c->glyphs->has (iter.get_glyph ())) {
+ const AlternateSet &alt_set = this+alternateSet[iter.get_coverage ()];
+ unsigned int count = alt_set.len;
+ for (unsigned int i = 0; i < count; i++)
+ c->glyphs->add (alt_set[i]);
+ }
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ c->input->add (iter.get_glyph ());
+ const AlternateSet &alt_set = this+alternateSet[iter.get_coverage ()];
+ unsigned int count = alt_set.len;
+ for (unsigned int i = 0; i < count; i++)
+ c->output->add (alt_set[i]);
+ }
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
+
+ unsigned int index = (this+coverage).get_coverage (glyph_id);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ const AlternateSet &alt_set = this+alternateSet[index];
+
+ if (unlikely (!alt_set.len)) return_trace (false);
+
+ hb_mask_t glyph_mask = c->buffer->cur().mask;
+ hb_mask_t lookup_mask = c->lookup_mask;
+
+ /* Note: This breaks badly if two features enabled this lookup together. */
+ unsigned int shift = _hb_ctz (lookup_mask);
+ unsigned int alt_index = ((lookup_mask & glyph_mask) >> shift);
+
+ if (unlikely (alt_index > alt_set.len || alt_index == 0)) return_trace (false);
+
+ glyph_id = alt_set[alt_index - 1];
+
+ c->replace_glyph (glyph_id);
+
+ return_trace (true);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &alternate_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &alternate_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!alternateSet.serialize (c, num_glyphs))) return_trace (false);
+ for (unsigned int i = 0; i < num_glyphs; i++)
+ if (unlikely (!alternateSet[i].serialize (c, this).serialize (c,
+ alternate_glyphs_list,
+ alternate_len_list[i]))) return_trace (false);
+ alternate_len_list.advance (num_glyphs);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (coverage.sanitize (c, this) && alternateSet.sanitize (c, this));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 1 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ OffsetArrayOf<AlternateSet>
+ alternateSet; /* Array of AlternateSet tables
+ * ordered by Coverage Index */
+ public:
+ DEFINE_SIZE_ARRAY (6, alternateSet);
+};
+
+struct AlternateSubst
+{
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &alternate_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &alternate_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
+ unsigned int format = 1;
+ u.format.set (format);
+ switch (u.format) {
+ case 1: return_trace (u.format1.serialize (c, glyphs, alternate_len_list, num_glyphs, alternate_glyphs_list));
+ default:return_trace (false);
+ }
+ }
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
+ switch (u.format) {
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ AlternateSubstFormat1 format1;
+ } u;
+};
+
+
+struct Ligature
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ unsigned int count = component.len;
+ for (unsigned int i = 1; i < count; i++)
+ if (!c->glyphs->has (component[i]))
+ return;
+ c->glyphs->add (ligGlyph);
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ unsigned int count = component.len;
+ for (unsigned int i = 1; i < count; i++)
+ c->input->add (component[i]);
+ c->output->add (ligGlyph);
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ if (c->len != component.len)
+ return_trace (false);
+
+ for (unsigned int i = 1; i < c->len; i++)
+ if (likely (c->glyphs[i] != component[i]))
+ return_trace (false);
+
+ return_trace (true);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ unsigned int count = component.len;
+
+ if (unlikely (!count)) return_trace (false);
+
+ /* Special-case to make it in-place and not consider this
+ * as a "ligated" substitution. */
+ if (unlikely (count == 1))
+ {
+ c->replace_glyph (ligGlyph);
+ return_trace (true);
+ }
+
+ bool is_mark_ligature = false;
+ unsigned int total_component_count = 0;
+
+ unsigned int match_length = 0;
+ unsigned int match_positions[MAX_CONTEXT_LENGTH];
+
+ if (likely (!match_input (c, count,
+ &component[1],
+ match_glyph,
+ NULL,
+ &match_length,
+ match_positions,
+ &is_mark_ligature,
+ &total_component_count)))
+ return_trace (false);
+
+ ligate_input (c,
+ count,
+ match_positions,
+ match_length,
+ ligGlyph,
+ is_mark_ligature,
+ total_component_count);
+
+ return_trace (true);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ GlyphID ligature,
+ Supplier<GlyphID> &components, /* Starting from second */
+ unsigned int num_components /* Including first component */)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ ligGlyph = ligature;
+ if (unlikely (!component.serialize (c, components, num_components))) return_trace (false);
+ return_trace (true);
+ }
+
+ public:
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (ligGlyph.sanitize (c) && component.sanitize (c));
+ }
+
+ protected:
+ GlyphID ligGlyph; /* GlyphID of ligature to substitute */
+ HeadlessArrayOf<GlyphID>
+ component; /* Array of component GlyphIDs--start
+ * with the second component--ordered
+ * in writing direction */
+ public:
+ DEFINE_SIZE_ARRAY (4, component);
+};
+
+struct LigatureSet
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ unsigned int num_ligs = ligature.len;
+ for (unsigned int i = 0; i < num_ligs; i++)
+ (this+ligature[i]).closure (c);
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ unsigned int num_ligs = ligature.len;
+ for (unsigned int i = 0; i < num_ligs; i++)
+ (this+ligature[i]).collect_glyphs (c);
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ unsigned int num_ligs = ligature.len;
+ for (unsigned int i = 0; i < num_ligs; i++)
+ {
+ const Ligature &lig = this+ligature[i];
+ if (lig.would_apply (c))
+ return_trace (true);
+ }
+ return_trace (false);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ unsigned int num_ligs = ligature.len;
+ for (unsigned int i = 0; i < num_ligs; i++)
+ {
+ const Ligature &lig = this+ligature[i];
+ if (lig.apply (c)) return_trace (true);
+ }
+
+ return_trace (false);
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &ligatures,
+ Supplier<unsigned int> &component_count_list,
+ unsigned int num_ligatures,
+ Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!ligature.serialize (c, num_ligatures))) return_trace (false);
+ for (unsigned int i = 0; i < num_ligatures; i++)
+ if (unlikely (!ligature[i].serialize (c, this).serialize (c,
+ ligatures[i],
+ component_list,
+ component_count_list[i]))) return_trace (false);
+ ligatures.advance (num_ligatures);
+ component_count_list.advance (num_ligatures);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (ligature.sanitize (c, this));
+ }
+
+ protected:
+ OffsetArrayOf<Ligature>
+ ligature; /* Array LigatureSet tables
+ * ordered by preference */
+ public:
+ DEFINE_SIZE_ARRAY (2, ligature);
+};
+
+struct LigatureSubstFormat1
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ if (c->glyphs->has (iter.get_glyph ()))
+ (this+ligatureSet[iter.get_coverage ()]).closure (c);
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ c->input->add (iter.get_glyph ());
+ (this+ligatureSet[iter.get_coverage ()]).collect_glyphs (c);
+ }
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ unsigned int index = (this+coverage).get_coverage (c->glyphs[0]);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ const LigatureSet &lig_set = this+ligatureSet[index];
+ return_trace (lig_set.would_apply (c));
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
+
+ unsigned int index = (this+coverage).get_coverage (glyph_id);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ const LigatureSet &lig_set = this+ligatureSet[index];
+ return_trace (lig_set.apply (c));
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &first_glyphs,
+ Supplier<unsigned int> &ligature_per_first_glyph_count_list,
+ unsigned int num_first_glyphs,
+ Supplier<GlyphID> &ligatures_list,
+ Supplier<unsigned int> &component_count_list,
+ Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!ligatureSet.serialize (c, num_first_glyphs))) return_trace (false);
+ for (unsigned int i = 0; i < num_first_glyphs; i++)
+ if (unlikely (!ligatureSet[i].serialize (c, this).serialize (c,
+ ligatures_list,
+ component_count_list,
+ ligature_per_first_glyph_count_list[i],
+ component_list))) return_trace (false);
+ ligature_per_first_glyph_count_list.advance (num_first_glyphs);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, first_glyphs, num_first_glyphs))) return_trace (false);
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 1 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ OffsetArrayOf<LigatureSet>
+ ligatureSet; /* Array LigatureSet tables
+ * ordered by Coverage Index */
+ public:
+ DEFINE_SIZE_ARRAY (6, ligatureSet);
+};
+
+struct LigatureSubst
+{
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &first_glyphs,
+ Supplier<unsigned int> &ligature_per_first_glyph_count_list,
+ unsigned int num_first_glyphs,
+ Supplier<GlyphID> &ligatures_list,
+ Supplier<unsigned int> &component_count_list,
+ Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
+ unsigned int format = 1;
+ u.format.set (format);
+ switch (u.format) {
+ case 1: return_trace (u.format1.serialize (c,
+ first_glyphs,
+ ligature_per_first_glyph_count_list,
+ num_first_glyphs,
+ ligatures_list,
+ component_count_list,
+ component_list));
+ default:return_trace (false);
+ }
+ }
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
+ switch (u.format) {
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ LigatureSubstFormat1 format1;
+ } u;
+};
+
+
+struct ContextSubst : Context {};
+
+struct ChainContextSubst : ChainContext {};
+
+struct ExtensionSubst : Extension<ExtensionSubst>
+{
+ typedef struct SubstLookupSubTable LookupSubTable;
+
+ inline bool is_reverse (void) const;
+};
+
+
+struct ReverseChainSingleSubstFormat1
+{
+ inline void closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+
+ unsigned int count;
+
+ count = backtrack.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (!(this+backtrack[i]).intersects (c->glyphs))
+ return;
+
+ count = lookahead.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (!(this+lookahead[i]).intersects (c->glyphs))
+ return;
+
+ const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+ Coverage::Iter iter;
+ for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ if (c->glyphs->has (iter.get_glyph ()))
+ c->glyphs->add (substitute[iter.get_coverage ()]);
+ }
+ }
+
+ inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+
+ unsigned int count;
+
+ (this+coverage).add_coverage (c->input);
+
+ count = backtrack.len;
+ for (unsigned int i = 0; i < count; i++)
+ (this+backtrack[i]).add_coverage (c->before);
+
+ count = lookahead.len;
+ for (unsigned int i = 0; i < count; i++)
+ (this+lookahead[i]).add_coverage (c->after);
+
+ const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+ count = substitute.len;
+ for (unsigned int i = 0; i < count; i++)
+ c->output->add (substitute[i]);
+ }
+
+ inline const Coverage &get_coverage (void) const
+ {
+ return this+coverage;
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c) const
+ {
+ TRACE_WOULD_APPLY (this);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ if (unlikely (c->nesting_level_left != MAX_NESTING_LEVEL))
+ return_trace (false); /* No chaining to this type */
+
+ unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
+ if (likely (index == NOT_COVERED)) return_trace (false);
+
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+ const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+
+ if (match_backtrack (c,
+ backtrack.len, (USHORT *) backtrack.array,
+ match_coverage, this) &&
+ match_lookahead (c,
+ lookahead.len, (USHORT *) lookahead.array,
+ match_coverage, this,
+ 1))
+ {
+ c->replace_glyph_inplace (substitute[index]);
+ /* Note: We DON'T decrease buffer->idx. The main loop does it
+ * for us. This is useful for preventing surprises if someone
+ * calls us through a Context lookup. */
+ return_trace (true);
+ }
+
+ return_trace (false);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (!(coverage.sanitize (c, this) && backtrack.sanitize (c, this)))
+ return_trace (false);
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+ if (!lookahead.sanitize (c, this))
+ return_trace (false);
+ const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+ return_trace (substitute.sanitize (c));
+ }
+
+ protected:
+ USHORT format; /* Format identifier--format = 1 */
+ OffsetTo<Coverage>
+ coverage; /* Offset to Coverage table--from
+ * beginning of table */
+ OffsetArrayOf<Coverage>
+ backtrack; /* Array of coverage tables
+ * in backtracking sequence, in glyph
+ * sequence order */
+ OffsetArrayOf<Coverage>
+ lookaheadX; /* Array of coverage tables
+ * in lookahead sequence, in glyph
+ * sequence order */
+ ArrayOf<GlyphID>
+ substituteX; /* Array of substitute
+ * GlyphIDs--ordered by Coverage Index */
+ public:
+ DEFINE_SIZE_MIN (10);
+};
+
+struct ReverseChainSingleSubst
+{
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
+ switch (u.format) {
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ ReverseChainSingleSubstFormat1 format1;
+ } u;
+};
+
+
+
+/*
+ * SubstLookup
+ */
+
+struct SubstLookupSubTable
+{
+ friend struct SubstLookup;
+
+ enum Type {
+ Single = 1,
+ Multiple = 2,
+ Alternate = 3,
+ Ligature = 4,
+ Context = 5,
+ ChainContext = 6,
+ Extension = 7,
+ ReverseChainSingle = 8
+ };
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const
+ {
+ TRACE_DISPATCH (this, lookup_type);
+ if (unlikely (!c->may_dispatch (this, &u.sub_format))) return_trace (c->no_dispatch_return_value ());
+ switch (lookup_type) {
+ case Single: return_trace (u.single.dispatch (c));
+ case Multiple: return_trace (u.multiple.dispatch (c));
+ case Alternate: return_trace (u.alternate.dispatch (c));
+ case Ligature: return_trace (u.ligature.dispatch (c));
+ case Context: return_trace (u.context.dispatch (c));
+ case ChainContext: return_trace (u.chainContext.dispatch (c));
+ case Extension: return_trace (u.extension.dispatch (c));
+ case ReverseChainSingle: return_trace (u.reverseChainContextSingle.dispatch (c));
+ default: return_trace (c->default_return_value ());
+ }
+ }
+
+ protected:
+ union {
+ USHORT sub_format;
+ SingleSubst single;
+ MultipleSubst multiple;
+ AlternateSubst alternate;
+ LigatureSubst ligature;
+ ContextSubst context;
+ ChainContextSubst chainContext;
+ ExtensionSubst extension;
+ ReverseChainSingleSubst reverseChainContextSingle;
+ } u;
+ public:
+ DEFINE_SIZE_UNION (2, sub_format);
+};
+
+
+struct SubstLookup : Lookup
+{
+ inline const SubstLookupSubTable& get_subtable (unsigned int i) const
+ { return Lookup::get_subtable<SubstLookupSubTable> (i); }
+
+ inline static bool lookup_type_is_reverse (unsigned int lookup_type)
+ { return lookup_type == SubstLookupSubTable::ReverseChainSingle; }
+
+ inline bool is_reverse (void) const
+ {
+ unsigned int type = get_type ();
+ if (unlikely (type == SubstLookupSubTable::Extension))
+ return CastR<ExtensionSubst> (get_subtable(0)).is_reverse ();
+ return lookup_type_is_reverse (type);
+ }
+
+ inline bool apply (hb_apply_context_t *c) const
+ {
+ TRACE_APPLY (this);
+ return_trace (dispatch (c));
+ }
+
+ inline hb_closure_context_t::return_t closure (hb_closure_context_t *c) const
+ {
+ TRACE_CLOSURE (this);
+ c->set_recurse_func (dispatch_recurse_func<hb_closure_context_t>);
+ return_trace (dispatch (c));
+ }
+
+ inline hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const
+ {
+ TRACE_COLLECT_GLYPHS (this);
+ c->set_recurse_func (dispatch_recurse_func<hb_collect_glyphs_context_t>);
+ return_trace (dispatch (c));
+ }
+
+ template <typename set_t>
+ inline void add_coverage (set_t *glyphs) const
+ {
+ hb_add_coverage_context_t<set_t> c (glyphs);
+ dispatch (&c);
+ }
+
+ inline bool would_apply (hb_would_apply_context_t *c,
+ const hb_ot_layout_lookup_accelerator_t *accel) const
+ {
+ TRACE_WOULD_APPLY (this);
+ if (unlikely (!c->len)) return_trace (false);
+ if (!accel->may_have (c->glyphs[0])) return_trace (false);
+ return_trace (dispatch (c));
+ }
+
+ static bool apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index);
+
+ inline SubstLookupSubTable& serialize_subtable (hb_serialize_context_t *c,
+ unsigned int i)
+ { return get_subtables<SubstLookupSubTable> ()[i].serialize (c, this); }
+
+ inline bool serialize_single (hb_serialize_context_t *c,
+ uint32_t lookup_props,
+ Supplier<GlyphID> &glyphs,
+ Supplier<GlyphID> &substitutes,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Single, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.single.serialize (c, glyphs, substitutes, num_glyphs));
+ }
+
+ inline bool serialize_multiple (hb_serialize_context_t *c,
+ uint32_t lookup_props,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &substitute_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &substitute_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Multiple, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.multiple.serialize (c,
+ glyphs,
+ substitute_len_list,
+ num_glyphs,
+ substitute_glyphs_list));
+ }
+
+ inline bool serialize_alternate (hb_serialize_context_t *c,
+ uint32_t lookup_props,
+ Supplier<GlyphID> &glyphs,
+ Supplier<unsigned int> &alternate_len_list,
+ unsigned int num_glyphs,
+ Supplier<GlyphID> &alternate_glyphs_list)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Alternate, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.alternate.serialize (c,
+ glyphs,
+ alternate_len_list,
+ num_glyphs,
+ alternate_glyphs_list));
+ }
+
+ inline bool serialize_ligature (hb_serialize_context_t *c,
+ uint32_t lookup_props,
+ Supplier<GlyphID> &first_glyphs,
+ Supplier<unsigned int> &ligature_per_first_glyph_count_list,
+ unsigned int num_first_glyphs,
+ Supplier<GlyphID> &ligatures_list,
+ Supplier<unsigned int> &component_count_list,
+ Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Ligature, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.ligature.serialize (c,
+ first_glyphs,
+ ligature_per_first_glyph_count_list,
+ num_first_glyphs,
+ ligatures_list,
+ component_count_list,
+ component_list));
+ }
+
+ template <typename context_t>
+ static inline typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index);
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ { return Lookup::dispatch<SubstLookupSubTable> (c); }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!Lookup::sanitize (c))) return_trace (false);
+ if (unlikely (!dispatch (c))) return_trace (false);
+
+ if (unlikely (get_type () == SubstLookupSubTable::Extension))
+ {
+ /* The spec says all subtables of an Extension lookup should
+ * have the same type. This is specially important if one has
+ * a reverse type! */
+ unsigned int type = get_subtable (0).u.extension.get_type ();
+ unsigned int count = get_subtable_count ();
+ for (unsigned int i = 1; i < count; i++)
+ if (get_subtable (i).u.extension.get_type () != type)
+ return_trace (false);
+ }
+ return_trace (true);
+ }
+};
+
+typedef OffsetListOf<SubstLookup> SubstLookupList;
+
+/*
+ * GSUB -- The Glyph Substitution Table
+ */
+
+struct GSUB : GSUBGPOS
+{
+ static const hb_tag_t tableTag = HB_OT_TAG_GSUB;
+
+ inline const SubstLookup& get_lookup (unsigned int i) const
+ { return CastR<SubstLookup> (GSUBGPOS::get_lookup (i)); }
+
+ static inline void substitute_start (hb_font_t *font, hb_buffer_t *buffer);
+ static inline void substitute_finish (hb_font_t *font, hb_buffer_t *buffer);
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!GSUBGPOS::sanitize (c))) return_trace (false);
+ const OffsetTo<SubstLookupList> &list = CastR<OffsetTo<SubstLookupList> > (lookupList);
+ return_trace (list.sanitize (c, this));
+ }
+ public:
+ DEFINE_SIZE_STATIC (10);
+};
+
+
+void
+GSUB::substitute_start (hb_font_t *font, hb_buffer_t *buffer)
+{
+ _hb_buffer_assert_gsubgpos_vars (buffer);
+
+ const GDEF &gdef = *hb_ot_layout_from_face (font->face)->gdef;
+ unsigned int count = buffer->len;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ _hb_glyph_info_set_glyph_props (&buffer->info[i], gdef.get_glyph_props (buffer->info[i].codepoint));
+ _hb_glyph_info_clear_lig_props (&buffer->info[i]);
+ buffer->info[i].syllable() = 0;
+ }
+}
+
+void
+GSUB::substitute_finish (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer HB_UNUSED)
+{
+}
+
+
+/* Out-of-class implementation for methods recursing */
+
+/*static*/ inline bool ExtensionSubst::is_reverse (void) const
+{
+ unsigned int type = get_type ();
+ if (unlikely (type == SubstLookupSubTable::Extension))
+ return CastR<ExtensionSubst> (get_subtable<LookupSubTable>()).is_reverse ();
+ return SubstLookup::lookup_type_is_reverse (type);
+}
+
+template <typename context_t>
+/*static*/ inline typename context_t::return_t SubstLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
+{
+ const GSUB &gsub = *(hb_ot_layout_from_face (c->face)->gsub);
+ const SubstLookup &l = gsub.get_lookup (lookup_index);
+ return l.dispatch (c);
+}
+
+/*static*/ inline bool SubstLookup::apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index)
+{
+ const GSUB &gsub = *(hb_ot_layout_from_face (c->face)->gsub);
+ const SubstLookup &l = gsub.get_lookup (lookup_index);
+ unsigned int saved_lookup_props = c->lookup_props;
+ unsigned int saved_lookup_index = c->lookup_index;
+ c->set_lookup_index (lookup_index);
+ c->set_lookup_props (l.get_props ());
+ bool ret = l.dispatch (c);
+ c->set_lookup_index (saved_lookup_index);
+ c->set_lookup_props (saved_lookup_props);
+ return ret;
+}
+
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_LAYOUT_GSUB_TABLE_HH */