diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-layout-gsub-table.hh')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-layout-gsub-table.hh | 1392 |
1 files changed, 0 insertions, 1392 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-layout-gsub-table.hh b/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-layout-gsub-table.hh deleted file mode 100644 index 2b421a94f54..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-layout-gsub-table.hh +++ /dev/null @@ -1,1392 +0,0 @@ -/* - * 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_RETURN (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_RETURN (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_RETURN (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_RETURN (false); - if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false); - deltaGlyphID.set (delta); /* TODO(serilaize) overflow? */ - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (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_RETURN (false); - - if (unlikely (index >= substitute.len)) return TRACE_RETURN (false); - - glyph_id = substitute[index]; - c->replace_glyph (glyph_id); - - return TRACE_RETURN (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_RETURN (false); - if (unlikely (!substitute.serialize (c, substitutes, num_glyphs))) return TRACE_RETURN (false); - if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (false); - unsigned int format = 2; - int delta; - 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_RETURN (u.format1.serialize (c, glyphs, num_glyphs, delta)); - case 2: return TRACE_RETURN (u.format2.serialize (c, glyphs, substitutes, num_glyphs)); - default:return TRACE_RETURN (false); - } - } - - template <typename context_t> - inline typename context_t::return_t dispatch (context_t *c) const - { - TRACE_DISPATCH (this); - switch (u.format) { - case 1: return TRACE_RETURN (c->dispatch (u.format1)); - case 2: return TRACE_RETURN (c->dispatch (u.format2)); - default:return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return TRACE_RETURN (false); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.sanitize (c)); - case 2: return TRACE_RETURN (u.format2.sanitize (c)); - default:return TRACE_RETURN (true); - } - } - - 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_RETURN (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_RETURN (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_RETURN (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_RETURN (false); - if (unlikely (!substitute.serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (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_RETURN (false); - - return TRACE_RETURN ((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_RETURN (false); - if (unlikely (!sequence.serialize (c, num_glyphs))) return TRACE_RETURN (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_RETURN (false); - substitute_len_list.advance (num_glyphs); - if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (false); - unsigned int format = 1; - u.format.set (format); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, substitute_len_list, num_glyphs, substitute_glyphs_list)); - default:return TRACE_RETURN (false); - } - } - - template <typename context_t> - inline typename context_t::return_t dispatch (context_t *c) const - { - TRACE_DISPATCH (this); - switch (u.format) { - case 1: return TRACE_RETURN (c->dispatch (u.format1)); - default:return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return TRACE_RETURN (false); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.sanitize (c)); - default:return TRACE_RETURN (true); - } - } - - 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_RETURN (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_RETURN (false); - - const AlternateSet &alt_set = this+alternateSet[index]; - - if (unlikely (!alt_set.len)) return TRACE_RETURN (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_RETURN (false); - - glyph_id = alt_set[alt_index - 1]; - - c->replace_glyph (glyph_id); - - return TRACE_RETURN (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_RETURN (false); - if (unlikely (!alternateSet.serialize (c, num_glyphs))) return TRACE_RETURN (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_RETURN (false); - alternate_len_list.advance (num_glyphs); - if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (false); - unsigned int format = 1; - u.format.set (format); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, alternate_len_list, num_glyphs, alternate_glyphs_list)); - default:return TRACE_RETURN (false); - } - } - - template <typename context_t> - inline typename context_t::return_t dispatch (context_t *c) const - { - TRACE_DISPATCH (this); - switch (u.format) { - case 1: return TRACE_RETURN (c->dispatch (u.format1)); - default:return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return TRACE_RETURN (false); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.sanitize (c)); - default:return TRACE_RETURN (true); - } - } - - 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_RETURN (false); - - for (unsigned int i = 1; i < c->len; i++) - if (likely (c->glyphs[i] != component[i])) - return TRACE_RETURN (false); - - return TRACE_RETURN (true); - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - unsigned int count = component.len; - - if (unlikely (!count)) return TRACE_RETURN (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_RETURN (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_RETURN (false); - - ligate_input (c, - count, - match_positions, - match_length, - ligGlyph, - is_mark_ligature, - total_component_count); - - return TRACE_RETURN (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_RETURN (false); - ligGlyph = ligature; - if (unlikely (!component.serialize (c, components, num_components))) return TRACE_RETURN (false); - return TRACE_RETURN (true); - } - - public: - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (true); - } - return TRACE_RETURN (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_RETURN (true); - } - - return TRACE_RETURN (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_RETURN (false); - if (unlikely (!ligature.serialize (c, num_ligatures))) return TRACE_RETURN (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_RETURN (false); - ligatures.advance (num_ligatures); - component_count_list.advance (num_ligatures); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (false); - - const LigatureSet &lig_set = this+ligatureSet[index]; - return TRACE_RETURN (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_RETURN (false); - - const LigatureSet &lig_set = this+ligatureSet[index]; - return TRACE_RETURN (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_RETURN (false); - if (unlikely (!ligatureSet.serialize (c, num_first_glyphs))) return TRACE_RETURN (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_RETURN (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_RETURN (false); - return TRACE_RETURN (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - return TRACE_RETURN (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_RETURN (false); - unsigned int format = 1; - u.format.set (format); - switch (u.format) { - case 1: return TRACE_RETURN (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_RETURN (false); - } - } - - template <typename context_t> - inline typename context_t::return_t dispatch (context_t *c) const - { - TRACE_DISPATCH (this); - switch (u.format) { - case 1: return TRACE_RETURN (c->dispatch (u.format1)); - default:return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return TRACE_RETURN (false); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.sanitize (c)); - default:return TRACE_RETURN (true); - } - } - - 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_RETURN (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_RETURN (false); /* No chaining to this type */ - - unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint); - if (likely (index == NOT_COVERED)) return TRACE_RETURN (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_RETURN (true); - } - - return TRACE_RETURN (false); - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!(coverage.sanitize (c, this) && backtrack.sanitize (c, this))) - return TRACE_RETURN (false); - OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack); - if (!lookahead.sanitize (c, this)) - return TRACE_RETURN (false); - ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead); - return TRACE_RETURN (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); - switch (u.format) { - case 1: return TRACE_RETURN (c->dispatch (u.format1)); - default:return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c) { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return TRACE_RETURN (false); - switch (u.format) { - case 1: return TRACE_RETURN (u.format1.sanitize (c)); - default:return TRACE_RETURN (true); - } - } - - 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); - switch (lookup_type) { - case Single: return TRACE_RETURN (u.single.dispatch (c)); - case Multiple: return TRACE_RETURN (u.multiple.dispatch (c)); - case Alternate: return TRACE_RETURN (u.alternate.dispatch (c)); - case Ligature: return TRACE_RETURN (u.ligature.dispatch (c)); - case Context: return TRACE_RETURN (u.context.dispatch (c)); - case ChainContext: return TRACE_RETURN (u.chainContext.dispatch (c)); - case Extension: return TRACE_RETURN (u.extension.dispatch (c)); - case ReverseChainSingle: return TRACE_RETURN (u.reverseChainContextSingle.dispatch (c)); - default: return TRACE_RETURN (c->default_return_value ()); - } - } - - inline bool sanitize (hb_sanitize_context_t *c, unsigned int lookup_type) { - TRACE_SANITIZE (this); - if (!u.header.sub_format.sanitize (c)) - return TRACE_RETURN (false); - switch (lookup_type) { - case Single: return TRACE_RETURN (u.single.sanitize (c)); - case Multiple: return TRACE_RETURN (u.multiple.sanitize (c)); - case Alternate: return TRACE_RETURN (u.alternate.sanitize (c)); - case Ligature: return TRACE_RETURN (u.ligature.sanitize (c)); - case Context: return TRACE_RETURN (u.context.sanitize (c)); - case ChainContext: return TRACE_RETURN (u.chainContext.sanitize (c)); - case Extension: return TRACE_RETURN (u.extension.sanitize (c)); - case ReverseChainSingle: return TRACE_RETURN (u.reverseChainContextSingle.sanitize (c)); - default: return TRACE_RETURN (true); - } - } - - protected: - union { - struct { - USHORT sub_format; - } header; - SingleSubst single; - MultipleSubst multiple; - AlternateSubst alternate; - LigatureSubst ligature; - ContextSubst context; - ChainContextSubst chainContext; - ExtensionSubst extension; - ReverseChainSingleSubst reverseChainContextSingle; - } u; - public: - DEFINE_SIZE_UNION (2, header.sub_format); -}; - - -struct SubstLookup : Lookup -{ - inline const SubstLookupSubTable& get_subtable (unsigned int i) const - { return this+CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable)[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 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_RETURN (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_RETURN (dispatch (c)); - } - - template <typename set_t> - inline void add_coverage (set_t *glyphs) const - { - hb_get_coverage_context_t c; - const Coverage *last = NULL; - unsigned int count = get_subtable_count (); - for (unsigned int i = 0; i < count; i++) { - const Coverage *coverage = &get_subtable (i).dispatch (&c, get_type ()); - if (coverage != last) { - coverage->add_coverage (glyphs); - last = coverage; - } - } - } - - inline bool would_apply (hb_would_apply_context_t *c, const hb_set_digest_t *digest) const - { - TRACE_WOULD_APPLY (this); - if (unlikely (!c->len)) return TRACE_RETURN (false); - if (!digest->may_have (c->glyphs[0])) return TRACE_RETURN (false); - return TRACE_RETURN (dispatch (c)); - } - - inline bool apply_once (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - if (!c->check_glyph_property (&c->buffer->cur(), c->lookup_props)) - return TRACE_RETURN (false); - return TRACE_RETURN (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 CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable)[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_RETURN (false); - return TRACE_RETURN (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_RETURN (false); - return TRACE_RETURN (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_RETURN (false); - return TRACE_RETURN (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_RETURN (false); - return TRACE_RETURN (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 - { - TRACE_DISPATCH (this); - unsigned int lookup_type = get_type (); - unsigned int count = get_subtable_count (); - for (unsigned int i = 0; i < count; i++) { - typename context_t::return_t r = get_subtable (i).dispatch (c, lookup_type); - if (c->stop_sublookup_iteration (r)) - return TRACE_RETURN (r); - } - return TRACE_RETURN (c->default_return_value ()); - } - - inline bool sanitize (hb_sanitize_context_t *c) - { - TRACE_SANITIZE (this); - if (unlikely (!Lookup::sanitize (c))) return TRACE_RETURN (false); - OffsetArrayOf<SubstLookupSubTable> &list = CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable); - if (unlikely (!list.sanitize (c, this, get_type ()))) return TRACE_RETURN (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_RETURN (false); - } - return TRACE_RETURN (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) { - TRACE_SANITIZE (this); - if (unlikely (!GSUBGPOS::sanitize (c))) return TRACE_RETURN (false); - OffsetTo<SubstLookupList> &list = CastR<OffsetTo<SubstLookupList> > (lookupList); - return TRACE_RETURN (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<SubstLookupSubTable>()).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; - c->set_lookup (l); - bool ret = l.apply_once (c); - c->lookup_props = saved_lookup_props; - return ret; -} - - -} /* namespace OT */ - - -#endif /* HB_OT_LAYOUT_GSUB_TABLE_HH */ |