From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 03:47:29 +0200 Subject: Adding upstream version 115.8.0esr. Signed-off-by: Daniel Baumann --- gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh | 189 +++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh (limited to 'gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh') diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh new file mode 100644 index 0000000000..0ba262e901 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh @@ -0,0 +1,189 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESET_HH +#define OT_LAYOUT_GSUB_LIGATURESET_HH + +#include "Common.hh" +#include "Ligature.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template +struct LigatureSet +{ + protected: + Array16OfOffset16To> + ligature; /* Array LigatureSet tables + * ordered by preference */ + public: + DEFINE_SIZE_ARRAY (2, ligature); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (ligature.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_map ([glyphs] (const Ligature &_) { return _.intersects (glyphs); }) + | hb_any + ; + } + + bool intersects_lig_glyph (const hb_set_t *glyphs) const + { + return + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_map ([glyphs] (const Ligature &_) { + return _.intersects_lig_glyph (glyphs) && _.intersects (glyphs); + }) + | hb_any + ; + } + + void closure (hb_closure_context_t *c) const + { + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Ligature &_) { _.closure (c); }) + ; + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Ligature &_) { _.collect_glyphs (c); }) + ; + } + + bool would_apply (hb_would_apply_context_t *c) const + { + return + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_map ([c] (const Ligature &_) { return _.would_apply (c); }) + | hb_any + ; + } + + static bool match_always (hb_glyph_info_t &info HB_UNUSED, unsigned value HB_UNUSED, const void *data HB_UNUSED) + { + return true; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + + unsigned int num_ligs = ligature.len; + +#ifndef HB_NO_OT_LIGATURES_FAST_PATH + if (HB_OPTIMIZE_SIZE_VAL || num_ligs <= 2) +#endif + { + slow: + for (unsigned int i = 0; i < num_ligs; i++) + { + const auto &lig = this+ligature.arrayZ[i]; + if (lig.apply (c)) return_trace (true); + } + return_trace (false); + } + + /* This version is optimized for speed by matching the first component + * of the ligature here, instead of calling into the ligation code. */ + + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (c->buffer->idx, 1); + skippy_iter.set_match_func (match_always, nullptr); + skippy_iter.set_glyph_data ((HBUINT16 *) nullptr); + unsigned unsafe_to; + hb_codepoint_t first = (unsigned) -1; + bool matched = skippy_iter.next (&unsafe_to); + if (likely (matched)) + { + first = c->buffer->info[skippy_iter.idx].codepoint; + unsafe_to = skippy_iter.idx + 1; + + if (skippy_iter.may_skip (c->buffer->info[skippy_iter.idx])) + { + /* Can't use the fast path if eg. the next char is a default-ignorable + * or other skippable. */ + goto slow; + } + } + + bool unsafe_to_concat = false; + + for (unsigned int i = 0; i < num_ligs; i++) + { + const auto &lig = this+ligature.arrayZ[i]; + if (unlikely (lig.component.lenP1 <= 1) || + lig.component[1] == first) + { + if (lig.apply (c)) + { + if (unsafe_to_concat) + c->buffer->unsafe_to_concat (c->buffer->idx, unsafe_to); + return_trace (true); + } + } + else if (likely (lig.component.lenP1 > 1)) + unsafe_to_concat = true; + } + if (likely (unsafe_to_concat)) + c->buffer->unsafe_to_concat (c->buffer->idx, unsafe_to); + + return_trace (false); + } + + bool serialize (hb_serialize_context_t *c, + hb_array_t ligatures, + hb_array_t component_count_list, + hb_array_t &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, ligatures.length))) return_trace (false); + for (unsigned int i = 0; i < ligatures.length; i++) + { + unsigned int component_count = (unsigned) hb_max ((int) component_count_list[i] - 1, 0); + if (unlikely (!ligature[i].serialize_serialize (c, + ligatures[i], + component_list.sub_array (0, component_count)))) + return_trace (false); + component_list += component_count; + } + return_trace (true); + } + + bool subset (hb_subset_context_t *c, unsigned coverage_idx) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + + hb_iter (ligature) + | hb_filter (subset_offset_array (c, out->ligature, this, coverage_idx)) + | hb_drain + ; + + if (bool (out->ligature)) + // Ensure Coverage table is always packed after this. + c->serializer->add_virtual_link (coverage_idx); + + return_trace (bool (out->ligature)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESET_HH */ -- cgit v1.2.3