132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
#ifndef OT_LAYOUT_GSUB_LIGATURESET_HH
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#define OT_LAYOUT_GSUB_LIGATURESET_HH
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#include "Common.hh"
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#include "Ligature.hh"
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namespace OT {
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namespace Layout {
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namespace GSUB_impl {
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template <typename Types>
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struct LigatureSet
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{
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protected:
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Array16OfOffset16To<Ligature<Types>>
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ligature; /* Array LigatureSet tables
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* ordered by preference */
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public:
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DEFINE_SIZE_ARRAY (2, ligature);
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (ligature.sanitize (c, this));
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}
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bool intersects (const hb_set_t *glyphs) const
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{
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return
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+ hb_iter (ligature)
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| hb_map (hb_add (this))
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| hb_map ([glyphs] (const Ligature<Types> &_) { return _.intersects (glyphs); })
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| hb_any
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;
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}
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bool intersects_lig_glyph (const hb_set_t *glyphs) const
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{
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return
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+ hb_iter (ligature)
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| hb_map (hb_add (this))
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| hb_map ([glyphs] (const Ligature<Types> &_) {
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return _.intersects_lig_glyph (glyphs) && _.intersects (glyphs);
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})
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| hb_any
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;
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}
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void closure (hb_closure_context_t *c) const
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{
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+ hb_iter (ligature)
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| hb_map (hb_add (this))
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| hb_apply ([c] (const Ligature<Types> &_) { _.closure (c); })
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;
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}
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void collect_glyphs (hb_collect_glyphs_context_t *c) const
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{
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+ hb_iter (ligature)
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| hb_map (hb_add (this))
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| hb_apply ([c] (const Ligature<Types> &_) { _.collect_glyphs (c); })
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;
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}
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bool would_apply (hb_would_apply_context_t *c) const
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{
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return
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+ hb_iter (ligature)
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| hb_map (hb_add (this))
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| hb_map ([c] (const Ligature<Types> &_) { return _.would_apply (c); })
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| hb_any
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;
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}
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bool apply (hb_ot_apply_context_t *c) const
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{
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TRACE_APPLY (this);
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unsigned int num_ligs = ligature.len;
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for (unsigned int i = 0; i < num_ligs; i++)
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{
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const auto &lig = this+ligature[i];
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if (lig.apply (c)) return_trace (true);
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}
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return_trace (false);
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}
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bool serialize (hb_serialize_context_t *c,
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hb_array_t<const HBGlyphID16> ligatures,
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hb_array_t<const unsigned int> component_count_list,
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hb_array_t<const HBGlyphID16> &component_list /* Starting from second for each ligature */)
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{
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TRACE_SERIALIZE (this);
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if (unlikely (!c->extend_min (this))) return_trace (false);
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if (unlikely (!ligature.serialize (c, ligatures.length))) return_trace (false);
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for (unsigned int i = 0; i < ligatures.length; i++)
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{
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unsigned int component_count = (unsigned) hb_max ((int) component_count_list[i] - 1, 0);
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if (unlikely (!ligature[i].serialize_serialize (c,
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ligatures[i],
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component_list.sub_array (0, component_count))))
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return_trace (false);
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component_list += component_count;
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}
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return_trace (true);
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}
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bool subset (hb_subset_context_t *c, unsigned coverage_idx) const
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{
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TRACE_SUBSET (this);
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auto *out = c->serializer->start_embed (*this);
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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+ hb_iter (ligature)
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| hb_filter (subset_offset_array (c, out->ligature, this, coverage_idx))
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| hb_drain
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;
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if (bool (out->ligature))
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// Ensure Coverage table is always packed after this.
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c->serializer->add_virtual_link (coverage_idx);
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return_trace (bool (out->ligature));
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}
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};
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}
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}
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}
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#endif /* OT_LAYOUT_GSUB_LIGATURESET_HH */
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