diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB')
22 files changed, 2487 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSet.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSet.hh new file mode 100644 index 0000000000..b4466119be --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSet.hh @@ -0,0 +1,126 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESET_HH +#define OT_LAYOUT_GSUB_ALTERNATESET_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct AlternateSet +{ + protected: + Array16Of<typename Types::HBGlyphID> + alternates; /* Array of alternate GlyphIDs--in + * arbitrary order */ + public: + DEFINE_SIZE_ARRAY (2, alternates); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (alternates.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_any (alternates, glyphs); } + + void closure (hb_closure_context_t *c) const + { c->output->add_array (alternates.arrayZ, alternates.len); } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { c->output->add_array (alternates.arrayZ, alternates.len); } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = alternates.len; + + if (unlikely (!count)) 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 alt_index is MAX_VALUE, randomize feature if it is the rand feature. */ + if (alt_index == HB_OT_MAP_MAX_VALUE && c->random) + { + /* Maybe we can do better than unsafe-to-break all; but since we are + * changing random state, it would be hard to track that. Good 'nough. */ + c->buffer->unsafe_to_break (0, c->buffer->len); + alt_index = c->random_number () % count + 1; + } + + if (unlikely (alt_index > count || alt_index == 0)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %u (alternate substitution)", + c->buffer->idx); + } + + c->replace_glyph (alternates[alt_index - 1]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (alternate substitution)", + c->buffer->idx - 1u); + } + + return_trace (true); + } + + unsigned + get_alternates (unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { + if (alternates.len && alternate_count) + { + + alternates.as_array ().sub_array (start_offset, alternate_count) + | hb_sink (hb_array (alternate_glyphs, *alternate_count)) + ; + } + return alternates.len; + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator alts) + { + TRACE_SERIALIZE (this); + return_trace (alternates.serialize (c, alts)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_iter (alternates) + | hb_filter (glyphset) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, it) && + out->alternates); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_ALTERNATESET_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubst.hh new file mode 100644 index 0000000000..04a052a783 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubst.hh @@ -0,0 +1,62 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESUBST_HH +#define OT_LAYOUT_GSUB_ALTERNATESUBST_HH + +#include "AlternateSubstFormat1.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct AlternateSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + AlternateSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + AlternateSubstFormat1_2<MediumTypes> format2; +#endif + } u; + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); + TRACE_DISPATCH (this, u.format); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + /* TODO This function is unused and not updated to 24bit GIDs. Should be done by using + * iterators. While at it perhaps using iterator of arrays of hb_codepoint_t instead. */ + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned int format = 1; + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, glyphs, alternate_len_list, alternate_glyphs_list)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_ALTERNATESUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubstFormat1.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubstFormat1.hh new file mode 100644 index 0000000000..adec65d586 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/AlternateSubstFormat1.hh @@ -0,0 +1,128 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH + +#include "AlternateSet.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct AlternateSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<AlternateSet<Types>>> + alternateSet; /* Array of AlternateSet tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (2 + 2 * Types::size, alternateSet); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && alternateSet.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, alternateSet) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const AlternateSet<Types> &_) { _.closure (c); }) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, alternateSet) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const AlternateSet<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + unsigned + get_glyph_alternates (hb_codepoint_t gid, + unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { return (this+alternateSet[(this+coverage).get_coverage (gid)]) + .get_alternates (start_offset, alternate_count, alternate_glyphs); } + + bool apply (hb_ot_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+alternateSet[index]).apply (c)); + } + + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!alternateSet.serialize (c, glyphs.length))) return_trace (false); + for (unsigned int i = 0; i < glyphs.length; i++) + { + unsigned int alternate_len = alternate_len_list[i]; + if (unlikely (!alternateSet[i] + .serialize_serialize (c, alternate_glyphs_list.sub_array (0, alternate_len)))) + return_trace (false); + alternate_glyphs_list += alternate_len; + } + return_trace (coverage.serialize_serialize (c, glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+coverage, alternateSet) + | hb_filter (glyphset, hb_first) + | hb_filter (subset_offset_array (c, out->alternateSet, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (bool (new_coverage)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ChainContextSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ChainContextSubst.hh new file mode 100644 index 0000000000..08fd779f73 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ChainContextSubst.hh @@ -0,0 +1,18 @@ +#ifndef OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH +#define OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ChainContextSubst : ChainContext {}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Common.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Common.hh new file mode 100644 index 0000000000..b849494d88 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Common.hh @@ -0,0 +1,19 @@ +#ifndef OT_LAYOUT_GSUB_COMMON_HH +#define OT_LAYOUT_GSUB_COMMON_HH + +#include "../../../hb-serialize.hh" +#include "../../../hb-ot-layout-gsubgpos.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template<typename Iterator> +static void SingleSubst_serialize (hb_serialize_context_t *c, + Iterator it); + +} +} +} + +#endif /* OT_LAYOUT_GSUB_COMMON_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ContextSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ContextSubst.hh new file mode 100644 index 0000000000..9f8cb46b5e --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ContextSubst.hh @@ -0,0 +1,18 @@ +#ifndef OT_LAYOUT_GSUB_CONTEXTSUBST_HH +#define OT_LAYOUT_GSUB_CONTEXTSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ContextSubst : Context {}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_CONTEXTSUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ExtensionSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ExtensionSubst.hh new file mode 100644 index 0000000000..831a7dfa2d --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ExtensionSubst.hh @@ -0,0 +1,22 @@ +#ifndef OT_LAYOUT_GSUB_EXTENSIONSUBST_HH +#define OT_LAYOUT_GSUB_EXTENSIONSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ExtensionSubst : Extension<ExtensionSubst> +{ + typedef struct SubstLookupSubTable SubTable; + bool is_reverse () const; +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_EXTENSIONSUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/GSUB.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/GSUB.hh new file mode 100644 index 0000000000..900cf603e4 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/GSUB.hh @@ -0,0 +1,61 @@ +#ifndef OT_LAYOUT_GSUB_GSUB_HH +#define OT_LAYOUT_GSUB_GSUB_HH + +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" +#include "SubstLookup.hh" + +namespace OT { + +using Layout::GSUB_impl::SubstLookup; + +namespace Layout { + +/* + * GSUB -- Glyph Substitution + * https://docs.microsoft.com/en-us/typography/opentype/spec/gsub + */ + +struct GSUB : GSUBGPOS +{ + using Lookup = SubstLookup; + + static constexpr hb_tag_t tableTag = HB_OT_TAG_GSUB; + + const SubstLookup& get_lookup (unsigned int i) const + { return static_cast<const SubstLookup &> (GSUBGPOS::get_lookup (i)); } + + bool subset (hb_subset_context_t *c) const + { + hb_subset_layout_context_t l (c, tableTag); + return GSUBGPOS::subset<SubstLookup> (&l); + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (GSUBGPOS::sanitize<SubstLookup> (c)); + } + + HB_INTERNAL bool is_blocklisted (hb_blob_t *blob, + hb_face_t *face) const; + + void closure_lookups (hb_face_t *face, + const hb_set_t *glyphs, + hb_set_t *lookup_indexes /* IN/OUT */) const + { GSUBGPOS::closure_lookups<SubstLookup> (face, glyphs, lookup_indexes); } + + typedef GSUBGPOS::accelerator_t<GSUB> accelerator_t; +}; + + +} + +struct GSUB_accelerator_t : Layout::GSUB::accelerator_t { + GSUB_accelerator_t (hb_face_t *face) : Layout::GSUB::accelerator_t (face) {} +}; + + +} + +#endif /* OT_LAYOUT_GSUB_GSUB_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Ligature.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Ligature.hh new file mode 100644 index 0000000000..402ed12ae2 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Ligature.hh @@ -0,0 +1,190 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURE_HH +#define OT_LAYOUT_GSUB_LIGATURE_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct Ligature +{ + public: + typename Types::HBGlyphID + ligGlyph; /* GlyphID of ligature to substitute */ + HeadlessArray16Of<typename Types::HBGlyphID> + component; /* Array of component GlyphIDs--start + * with the second component--ordered + * in writing direction */ + public: + DEFINE_SIZE_ARRAY (Types::size + 2, component); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (ligGlyph.sanitize (c) && component.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_all (component, glyphs); } + + bool intersects_lig_glyph (const hb_set_t *glyphs) const + { return glyphs->has(ligGlyph); } + + void closure (hb_closure_context_t *c) const + { + if (!intersects (c->glyphs)) return; + c->output->add (ligGlyph); + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + c->input->add_array (component.arrayZ, component.get_length ()); + c->output->add (ligGlyph); + } + + bool would_apply (hb_would_apply_context_t *c) const + { + if (c->len != component.lenP1) + return false; + + for (unsigned int i = 1; i < c->len; i++) + if (likely (c->glyphs[i] != component[i])) + return false; + + return true; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = component.lenP1; + + 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)) + { + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %u (ligature substitution)", + c->buffer->idx); + } + + c->replace_glyph (ligGlyph); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (ligature substitution)", + c->buffer->idx - 1u); + } + + return_trace (true); + } + + unsigned int total_component_count = 0; + + unsigned int match_end = 0; + unsigned int match_positions[HB_MAX_CONTEXT_LENGTH]; + + if (likely (!match_input (c, count, + &component[1], + match_glyph, + nullptr, + &match_end, + match_positions, + &total_component_count))) + { + c->buffer->unsafe_to_concat (c->buffer->idx, match_end); + return_trace (false); + } + + unsigned pos = 0; + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + unsigned delta = c->buffer->sync_so_far (); + + pos = c->buffer->idx; + + char buf[HB_MAX_CONTEXT_LENGTH * 16] = {0}; + char *p = buf; + + match_end += delta; + for (unsigned i = 0; i < count; i++) + { + match_positions[i] += delta; + if (i) + *p++ = ','; + snprintf (p, sizeof(buf) - (p - buf), "%u", match_positions[i]); + p += strlen(p); + } + + c->buffer->message (c->font, + "ligating glyphs at %s", + buf); + } + + ligate_input (c, + count, + match_positions, + match_end, + ligGlyph, + total_component_count); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "ligated glyph at %u", + pos); + } + + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + hb_codepoint_t ligature, + Iterator components /* Starting from second */) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + ligGlyph = ligature; + if (unlikely (!component.serialize (c, components))) return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c, unsigned coverage_idx) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + if (!intersects (&glyphset) || !glyphset.has (ligGlyph)) return_trace (false); + // Ensure Coverage table is always packed after this. + c->serializer->add_virtual_link (coverage_idx); + + auto it = + + hb_iter (component) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, + glyph_map[ligGlyph], + it)); } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURE_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSet.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSet.hh new file mode 100644 index 0000000000..08665438c4 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSet.hh @@ -0,0 +1,188 @@ +#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 <typename Types> +struct LigatureSet +{ + protected: + Array16OfOffset16To<Ligature<Types>> + 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<Types> &_) { 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<Types> &_) { + 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<Types> &_) { _.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<Types> &_) { _.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<Types> &_) { return _.would_apply (c); }) + | hb_any + ; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + + unsigned int num_ligs = ligature.len; + +#ifndef HB_NO_OT_RULESETS_FAST_PATH + if (HB_OPTIMIZE_SIZE_VAL || num_ligs <= 4) +#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. + * + * This is replicated in ChainRuleSet and RuleSet. */ + + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (c->buffer->idx); + 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; + } + } + else + 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.arrayZ[0] == 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<const HBGlyphID16> ligatures, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> &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 */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubst.hh new file mode 100644 index 0000000000..18f6e35581 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubst.hh @@ -0,0 +1,71 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESUBST_HH +#define OT_LAYOUT_GSUB_LIGATURESUBST_HH + +#include "Common.hh" +#include "LigatureSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct LigatureSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + LigatureSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + LigatureSubstFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); + TRACE_DISPATCH (this, u.format); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + /* TODO This function is only used by small GIDs, and not updated to 24bit GIDs. Should + * be done by using iterators. While at it perhaps using iterator of arrays of hb_codepoint_t + * instead. */ + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> 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 = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, + first_glyphs, + ligature_per_first_glyph_count_list, + ligatures_list, + component_count_list, + component_list)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubstFormat1.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubstFormat1.hh new file mode 100644 index 0000000000..5c7df97d13 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/LigatureSubstFormat1.hh @@ -0,0 +1,166 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH + +#include "Common.hh" +#include "LigatureSet.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct LigatureSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<LigatureSet<Types>>> + ligatureSet; /* Array LigatureSet tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (4 + Types::size, ligatureSet); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return + + hb_zip (this+coverage, ligatureSet) + | hb_filter (*glyphs, hb_first) + | hb_map (hb_second) + | hb_map ([this, glyphs] (const typename Types::template OffsetTo<LigatureSet<Types>> &_) + { return (this+_).intersects (glyphs); }) + | hb_any + ; + } + + bool may_have_non_1to1 () const + { return true; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, ligatureSet) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const LigatureSet<Types> &_) { _.closure (c); }) + ; + + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + + hb_zip (this+coverage, ligatureSet) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const LigatureSet<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { + unsigned int index = (this+coverage).get_coverage (c->glyphs[0]); + if (likely (index == NOT_COVERED)) return false; + + const auto &lig_set = this+ligatureSet[index]; + return lig_set.would_apply (c); + } + + bool apply (hb_ot_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); + + const auto &lig_set = this+ligatureSet[index]; + return_trace (lig_set.apply (c)); + } + + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> 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, first_glyphs.length))) return_trace (false); + for (unsigned int i = 0; i < first_glyphs.length; i++) + { + unsigned int ligature_count = ligature_per_first_glyph_count_list[i]; + if (unlikely (!ligatureSet[i] + .serialize_serialize (c, + ligatures_list.sub_array (0, ligature_count), + component_count_list.sub_array (0, ligature_count), + component_list))) return_trace (false); + ligatures_list += ligature_count; + component_count_list += ligature_count; + } + return_trace (coverage.serialize_serialize (c, first_glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + // Due to a bug in some older versions of windows 7 the Coverage table must be + // packed after the LigatureSet and Ligature tables, so serialize Coverage first + // which places it last in the packed order. + hb_set_t new_coverage; + + hb_zip (this+coverage, hb_iter (ligatureSet) | hb_map (hb_add (this))) + | hb_filter (glyphset, hb_first) + | hb_filter ([&] (const LigatureSet<Types>& _) { + return _.intersects_lig_glyph (&glyphset); + }, hb_second) + | hb_map (hb_first) + | hb_sink (new_coverage); + + if (!c->serializer->push<Coverage> () + ->serialize (c->serializer, + + new_coverage.iter () | hb_map_retains_sorting (glyph_map))) + { + c->serializer->pop_discard (); + return_trace (false); + } + + unsigned coverage_idx = c->serializer->pop_pack (); + c->serializer->add_link (out->coverage, coverage_idx); + + + hb_zip (this+coverage, ligatureSet) + | hb_filter (new_coverage, hb_first) + | hb_map (hb_second) + // to ensure that the repacker always orders the coverage table after the LigatureSet + // and LigatureSubtable's they will be linked to the Coverage table via a virtual link + // the coverage table object idx is passed down to facilitate this. + | hb_apply (subset_offset_array (c, out->ligatureSet, this, coverage_idx)) + ; + + return_trace (bool (new_coverage)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh new file mode 100644 index 0000000000..742c8587ee --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh @@ -0,0 +1,62 @@ +#ifndef OT_LAYOUT_GSUB_MULTIPLESUBST_HH +#define OT_LAYOUT_GSUB_MULTIPLESUBST_HH + +#include "Common.hh" +#include "MultipleSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct MultipleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + MultipleSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + MultipleSubstFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); + TRACE_DISPATCH (this, u.format); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned int format = 1; + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, it)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_MULTIPLESUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubstFormat1.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubstFormat1.hh new file mode 100644 index 0000000000..3b4bd11694 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubstFormat1.hh @@ -0,0 +1,130 @@ +#ifndef OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH + +#include "Common.hh" +#include "Sequence.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct MultipleSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<Sequence<Types>>> + sequence; /* Array of Sequence tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (4 + Types::size, sequence); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && sequence.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return true; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, sequence) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Sequence<Types> &_) { _.closure (c); }) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, sequence) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Sequence<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_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)); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + auto sequences = + + it + | hb_map (hb_second) + ; + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (!c->extend_min (this))) return_trace (false); + + if (unlikely (!sequence.serialize (c, sequences.length))) return_trace (false); + + for (auto& pair : hb_zip (sequences, sequence)) + { + if (unlikely (!pair.second + .serialize_serialize (c, pair.first))) + return_trace (false); + } + + return_trace (coverage.serialize_serialize (c, glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+coverage, sequence) + | hb_filter (glyphset, hb_first) + | hb_filter (subset_offset_array (c, out->sequence, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (bool (new_coverage)); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh new file mode 100644 index 0000000000..5ad463fea7 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh @@ -0,0 +1,36 @@ +#ifndef OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH +#define OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH + +#include "Common.hh" +#include "ReverseChainSingleSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ReverseChainSingleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + ReverseChainSingleSubstFormat1 format1; + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); + TRACE_DISPATCH (this, u.format); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh new file mode 100644 index 0000000000..ec374f2f02 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh @@ -0,0 +1,245 @@ +#ifndef OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ReverseChainSingleSubstFormat1 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + Offset16To<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of table */ + Array16OfOffset16To<Coverage> + backtrack; /* Array of coverage tables + * in backtracking sequence, in glyph + * sequence order */ + Array16OfOffset16To<Coverage> + lookaheadX; /* Array of coverage tables + * in lookahead sequence, in glyph + * sequence order */ + Array16Of<HBGlyphID16> + substituteX; /* Array of substitute + * GlyphIDs--ordered by Coverage Index */ + public: + DEFINE_SIZE_MIN (10); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!(coverage.sanitize (c, this) && backtrack.sanitize (c, this))) + return_trace (false); + hb_barrier (); + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + if (!lookahead.sanitize (c, this)) + return_trace (false); + hb_barrier (); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + return_trace (substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { + if (!(this+coverage).intersects (glyphs)) + return false; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + + unsigned int count; + + count = backtrack.len; + for (unsigned int i = 0; i < count; i++) + if (!(this+backtrack[i]).intersects (glyphs)) + return false; + + count = lookahead.len; + for (unsigned int i = 0; i < count; i++) + if (!(this+lookahead[i]).intersects (glyphs)) + return false; + + return true; + } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + if (!intersects (c->glyphs)) return; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + + hb_zip (this+coverage, substitute) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + unsigned int count; + + count = backtrack.len; + for (unsigned int i = 0; i < count; i++) + if (unlikely (!(this+backtrack[i]).collect_coverage (c->before))) return; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + count = lookahead.len; + for (unsigned int i = 0; i < count; i++) + if (unlikely (!(this+lookahead[i]).collect_coverage (c->after))) return; + + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + count = substitute.len; + c->output->add_array (substitute.arrayZ, substitute.len); + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_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); + + if (unlikely (c->nesting_level_left != HB_MAX_NESTING_LEVEL)) + return_trace (false); /* No chaining to this type */ + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + if (unlikely (index >= substitute.len)) return_trace (false); + + unsigned int start_index = 0, end_index = 0; + if (match_backtrack (c, + backtrack.len, (HBUINT16 *) backtrack.arrayZ, + match_coverage, this, + &start_index) && + match_lookahead (c, + lookahead.len, (HBUINT16 *) lookahead.arrayZ, + match_coverage, this, + c->buffer->idx + 1, &end_index)) + { + c->buffer->unsafe_to_break_from_outbuffer (start_index, end_index); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replacing glyph at %u (reverse chaining substitution)", + c->buffer->idx); + } + + c->replace_glyph_inplace (substitute[index]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (reverse chaining substitution)", + c->buffer->idx); + } + + /* 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); + } + else + { + c->buffer->unsafe_to_concat_from_outbuffer (start_index, end_index); + return_trace (false); + } + } + + template<typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool serialize_coverage_offset_array (hb_subset_context_t *c, Iterator it) const + { + TRACE_SERIALIZE (this); + auto *out = c->serializer->start_embed<Array16OfOffset16To<Coverage>> (); + + if (unlikely (!c->serializer->allocate_size<HBUINT16> (HBUINT16::static_size))) + return_trace (false); + + for (auto& offset : it) { + auto *o = out->serialize_append (c->serializer); + if (unlikely (!o) || !o->serialize_subset (c, offset, this)) + return_trace (false); + } + + return_trace (true); + } + + template<typename Iterator, typename BacktrackIterator, typename LookaheadIterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_pair_t)), + hb_requires (hb_is_iterator (BacktrackIterator)), + hb_requires (hb_is_iterator (LookaheadIterator))> + bool serialize (hb_subset_context_t *c, + Iterator coverage_subst_iter, + BacktrackIterator backtrack_iter, + LookaheadIterator lookahead_iter) const + { + TRACE_SERIALIZE (this); + + auto *out = c->serializer->start_embed (this); + if (unlikely (!c->serializer->embed (this->format))) return_trace (false); + if (unlikely (!c->serializer->embed (this->coverage))) return_trace (false); + + if (!serialize_coverage_offset_array (c, backtrack_iter)) return_trace (false); + if (!serialize_coverage_offset_array (c, lookahead_iter)) return_trace (false); + + auto *substitute_out = c->serializer->start_embed<Array16Of<HBGlyphID16>> (); + auto substitutes = + + coverage_subst_iter + | hb_map (hb_second) + ; + + auto glyphs = + + coverage_subst_iter + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (! c->serializer->check_success (substitute_out->serialize (c->serializer, substitutes)))) + return_trace (false); + + if (unlikely (!out->coverage.serialize_serialize (c->serializer, glyphs))) + return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + auto it = + + hb_zip (this+coverage, substitute) + | hb_filter (glyphset, hb_first) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const HBGlyphID16 &> p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + return_trace (bool (it) && serialize (c, it, backtrack.iter (), lookahead.iter ())); + } +}; + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Sequence.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Sequence.hh new file mode 100644 index 0000000000..a26cf8c6a6 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/Sequence.hh @@ -0,0 +1,165 @@ +#ifndef OT_LAYOUT_GSUB_SEQUENCE_HH +#define OT_LAYOUT_GSUB_SEQUENCE_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct Sequence +{ + protected: + Array16Of<typename Types::HBGlyphID> + substitute; /* String of GlyphIDs to substitute */ + public: + DEFINE_SIZE_ARRAY (2, substitute); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_all (substitute, glyphs); } + + void closure (hb_closure_context_t *c) const + { c->output->add_array (substitute.arrayZ, substitute.len); } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { c->output->add_array (substitute.arrayZ, substitute.len); } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = substitute.len; + + /* Special-case to make it in-place and not consider this + * as a "multiplied" substitution. */ + if (unlikely (count == 1)) + { + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %u (multiple substitution)", + c->buffer->idx); + } + + c->replace_glyph (substitute.arrayZ[0]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (multiple substitution)", + c->buffer->idx - 1u); + } + + return_trace (true); + } + /* Spec disallows this, but Uniscribe allows it. + * https://github.com/harfbuzz/harfbuzz/issues/253 */ + else if (unlikely (count == 0)) + { + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "deleting glyph at %u (multiple substitution)", + c->buffer->idx); + } + + c->buffer->delete_glyph (); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "deleted glyph at %u (multiple substitution)", + c->buffer->idx); + } + + return_trace (true); + } + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "multiplying glyph at %u", + c->buffer->idx); + } + + unsigned int klass = _hb_glyph_info_is_ligature (&c->buffer->cur()) ? + HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0; + unsigned lig_id = _hb_glyph_info_get_lig_id (&c->buffer->cur()); + + for (unsigned int i = 0; i < count; i++) + { + /* If is attached to a ligature, don't disturb that. + * https://github.com/harfbuzz/harfbuzz/issues/3069 */ + if (!lig_id) + _hb_glyph_info_set_lig_props_for_component (&c->buffer->cur(), i); + c->output_glyph_for_component (substitute.arrayZ[i], klass); + } + c->buffer->skip_glyph (); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + + char buf[HB_MAX_CONTEXT_LENGTH * 16] = {0}; + char *p = buf; + + for (unsigned i = c->buffer->idx - count; i < c->buffer->idx; i++) + { + if (buf < p) + *p++ = ','; + snprintf (p, sizeof(buf) - (p - buf), "%u", i); + p += strlen(p); + } + + c->buffer->message (c->font, + "multiplied glyphs at %s", + buf); + } + + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator subst) + { + TRACE_SERIALIZE (this); + return_trace (substitute.serialize (c, subst)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + if (!intersects (&glyphset)) return_trace (false); + + auto it = + + hb_iter (substitute) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, it)); + } +}; + + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_SEQUENCE_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh new file mode 100644 index 0000000000..181c9e52e5 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh @@ -0,0 +1,103 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBST_HH +#define OT_LAYOUT_GSUB_SINGLESUBST_HH + +#include "Common.hh" +#include "SingleSubstFormat1.hh" +#include "SingleSubstFormat2.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SingleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + SingleSubstFormat1_3<SmallTypes> format1; + SingleSubstFormat2_4<SmallTypes> format2; +#ifndef HB_NO_BEYOND_64K + SingleSubstFormat1_3<MediumTypes> format3; + SingleSubstFormat2_4<MediumTypes> format4; +#endif + } u; + + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); + TRACE_DISPATCH (this, u.format); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); + case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, + const hb_codepoint_pair_t))> + bool serialize (hb_serialize_context_t *c, + Iterator glyphs) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned format = 2; + unsigned delta = 0; + if (glyphs) + { + format = 1; + hb_codepoint_t mask = 0xFFFFu; + +#ifndef HB_NO_BEYOND_64K + if (+ glyphs + | hb_map_retains_sorting (hb_second) + | hb_filter ([] (hb_codepoint_t gid) { return gid > 0xFFFFu; })) + { + format += 2; + mask = 0xFFFFFFu; + } +#endif + + auto get_delta = [=] (hb_codepoint_pair_t _) + { return (unsigned) (_.second - _.first) & mask; }; + delta = get_delta (*glyphs); + if (!hb_all (++(+glyphs), delta, get_delta)) format += 1; + } + + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, + + glyphs + | hb_map_retains_sorting (hb_first), + delta)); + case 2: return_trace (u.format2.serialize (c, glyphs)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (u.format3.serialize (c, + + glyphs + | hb_map_retains_sorting (hb_first), + delta)); + case 4: return_trace (u.format4.serialize (c, glyphs)); +#endif + default:return_trace (false); + } + } +}; + +template<typename Iterator> +static void +SingleSubst_serialize (hb_serialize_context_t *c, + Iterator it) +{ c->start_embed<SingleSubst> ()->serialize (c, it); } + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SINGLESUBST_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat1.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat1.hh new file mode 100644 index 0000000000..850be86c04 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat1.hh @@ -0,0 +1,204 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct SingleSubstFormat1_3 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + typename Types::HBUINT + deltaGlyphID; /* Add to original GlyphID to get + * substitute GlyphID, modulo 0x10000 */ + + public: + DEFINE_SIZE_STATIC (2 + 2 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + coverage.sanitize (c, this) && + /* The coverage table may use a range to represent a set + * of glyphs, which means a small number of bytes can + * generate a large glyph set. Manually modify the + * sanitizer max ops to take this into account. + * + * Note: This check *must* be right after coverage sanitize. */ + c->check_ops ((this + coverage).get_population () >> 1)); + } + + hb_codepoint_t get_mask () const + { return (1 << (8 * Types::size)) - 1; } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + /* Help fuzzer avoid this function as much. */ + unsigned pop = (this+coverage).get_population (); + if (pop >= mask) + return; + + hb_set_t intersection; + (this+coverage).intersect_set (c->parent_active_glyphs (), intersection); + + /* In degenerate fuzzer-found fonts, but not real fonts, + * this table can keep adding new glyphs in each round of closure. + * Refuse to close-over, if it maps glyph range to overlapping range. */ + hb_codepoint_t min_before = intersection.get_min (); + hb_codepoint_t max_before = intersection.get_max (); + hb_codepoint_t min_after = (min_before + d) & mask; + hb_codepoint_t max_after = (max_before + d) & mask; + if (intersection.get_population () == max_before - min_before + 1 && + ((min_before <= min_after && min_after <= max_before) || + (min_before <= max_after && max_after <= max_before))) + return; + + + hb_iter (intersection) + | hb_map ([d, mask] (hb_codepoint_t g) { return (g + d) & mask; }) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + + hb_iter (this+coverage) + | hb_map ([d, mask] (hb_codepoint_t g) { return (g + d) & mask; }) + | hb_sink (c->output) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + unsigned + get_glyph_alternates (hb_codepoint_t glyph_id, + unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { + unsigned int index = (this+coverage).get_coverage (glyph_id); + if (likely (index == NOT_COVERED)) + { + if (alternate_count) + *alternate_count = 0; + return 0; + } + + if (alternate_count && *alternate_count) + { + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + glyph_id = (glyph_id + d) & mask; + + *alternate_glyphs = glyph_id; + *alternate_count = 1; + } + + return 1; + } + + bool apply (hb_ot_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); + + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + glyph_id = (glyph_id + d) & mask; + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %u (single substitution)", + c->buffer->idx); + } + + c->replace_glyph (glyph_id); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (single substitution)", + c->buffer->idx - 1u); + } + + return_trace (true); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator glyphs, + unsigned delta) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false); + c->check_assign (deltaGlyphID, delta, HB_SERIALIZE_ERROR_INT_OVERFLOW); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + hb_set_t intersection; + (this+coverage).intersect_set (glyphset, intersection); + + auto it = + + hb_iter (intersection) + | hb_map_retains_sorting ([d, mask] (hb_codepoint_t g) { + return hb_codepoint_pair_t (g, + (g + d) & mask); }) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_codepoint_pair_t p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + bool ret = bool (it); + SingleSubst_serialize (c->serializer, it); + return_trace (ret); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh new file mode 100644 index 0000000000..9c651abe71 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh @@ -0,0 +1,176 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH +#define OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct SingleSubstFormat2_4 +{ + protected: + HBUINT16 format; /* Format identifier--format = 2 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::HBGlyphID> + substitute; /* Array of substitute + * GlyphIDs--ordered by Coverage Index */ + + public: + DEFINE_SIZE_ARRAY (4 + Types::size, substitute); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + auto &cov = this+coverage; + auto &glyph_set = c->parent_active_glyphs (); + + if (substitute.len > glyph_set.get_population () * 4) + { + for (auto g : glyph_set) + { + unsigned i = cov.get_coverage (g); + if (i == NOT_COVERED || i >= substitute.len) + continue; + c->output->add (substitute.arrayZ[i]); + } + + return; + } + + + hb_zip (cov, substitute) + | hb_filter (glyph_set, hb_first) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, substitute) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + unsigned + get_glyph_alternates (hb_codepoint_t glyph_id, + unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { + unsigned int index = (this+coverage).get_coverage (glyph_id); + if (likely (index == NOT_COVERED)) + { + if (alternate_count) + *alternate_count = 0; + return 0; + } + + if (alternate_count && *alternate_count) + { + glyph_id = substitute[index]; + + *alternate_glyphs = glyph_id; + *alternate_count = 1; + } + + return 1; + } + + bool apply (hb_ot_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); + + if (unlikely (index >= substitute.len)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %u (single substitution)", + c->buffer->idx); + } + + c->replace_glyph (substitute[index]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %u (single substitution)", + c->buffer->idx - 1u); + } + + return_trace (true); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, + hb_codepoint_pair_t))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + auto substitutes = + + it + | hb_map (hb_second) + ; + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!substitute.serialize (c, substitutes))) return_trace (false); + if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_zip (this+coverage, substitute) + | hb_filter (glyphset, hb_first) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const typename Types::HBGlyphID &> p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + bool ret = bool (it); + SingleSubst_serialize (c->serializer, it); + return_trace (ret); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookup.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookup.hh new file mode 100644 index 0000000000..d49dcc0e0f --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookup.hh @@ -0,0 +1,220 @@ +#ifndef OT_LAYOUT_GSUB_SUBSTLOOKUP_HH +#define OT_LAYOUT_GSUB_SUBSTLOOKUP_HH + +#include "Common.hh" +#include "SubstLookupSubTable.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SubstLookup : Lookup +{ + using SubTable = SubstLookupSubTable; + + bool sanitize (hb_sanitize_context_t *c) const + { return Lookup::sanitize<SubTable> (c); } + + const SubTable& get_subtable (unsigned int i) const + { return Lookup::get_subtable<SubTable> (i); } + + static inline bool lookup_type_is_reverse (unsigned int lookup_type) + { return lookup_type == SubTable::ReverseChainSingle; } + + bool is_reverse () const + { + unsigned int type = get_type (); + if (unlikely (type == SubTable::Extension)) + return get_subtable (0).u.extension.is_reverse (); + return lookup_type_is_reverse (type); + } + + bool may_have_non_1to1 () const + { + hb_have_non_1to1_context_t c; + return dispatch (&c); + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + return_trace (dispatch (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c); + } + + hb_closure_context_t::return_t closure (hb_closure_context_t *c, unsigned int this_index) const + { + if (!c->should_visit_lookup (this_index)) + return hb_closure_context_t::default_return_value (); + + c->set_recurse_func (dispatch_closure_recurse_func); + + hb_closure_context_t::return_t ret = dispatch (c); + + c->flush (); + + return ret; + } + + hb_closure_lookups_context_t::return_t closure_lookups (hb_closure_lookups_context_t *c, unsigned this_index) const + { + if (c->is_lookup_visited (this_index)) + return hb_closure_lookups_context_t::default_return_value (); + + c->set_lookup_visited (this_index); + if (!intersects (c->glyphs)) + { + c->set_lookup_inactive (this_index); + return hb_closure_lookups_context_t::default_return_value (); + } + + hb_closure_lookups_context_t::return_t ret = dispatch (c); + return ret; + } + + hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const + { + c->set_recurse_func (dispatch_recurse_func<hb_collect_glyphs_context_t>); + return dispatch (c); + } + + template <typename set_t> + void collect_coverage (set_t *glyphs) const + { + hb_collect_coverage_context_t<set_t> c (glyphs); + dispatch (&c); + } + + bool would_apply (hb_would_apply_context_t *c, + const hb_ot_layout_lookup_accelerator_t *accel) const + { + if (unlikely (!c->len)) return false; + if (!accel->may_have (c->glyphs[0])) return false; + return dispatch (c); + } + + template<typename Glyphs, typename Substitutes, + hb_requires (hb_is_sorted_source_of (Glyphs, + const hb_codepoint_t) && + hb_is_source_of (Substitutes, + const hb_codepoint_t))> + bool serialize_single (hb_serialize_context_t *c, + uint32_t lookup_props, + Glyphs glyphs, + Substitutes substitutes) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Single, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.single.serialize (c, hb_zip (glyphs, substitutes))) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + uint32_t lookup_props, + Iterator it) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Multiple, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.multiple. + serialize (c, it)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + bool serialize_alternate (hb_serialize_context_t *c, + uint32_t lookup_props, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Alternate, lookup_props, 1))) return_trace (false); + + if (c->push<SubTable> ()->u.alternate. + serialize (c, + glyphs, + alternate_len_list, + alternate_glyphs_list)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + bool serialize_ligature (hb_serialize_context_t *c, + uint32_t lookup_props, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Ligature, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.ligature. + serialize (c, + first_glyphs, + ligature_per_first_glyph_count_list, + ligatures_list, + component_count_list, + component_list)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + template <typename context_t> + static inline typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index); + + static inline typename hb_closure_context_t::return_t closure_glyphs_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index); + + static inline hb_closure_context_t::return_t dispatch_closure_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index) + { + if (!c->should_visit_lookup (lookup_index)) + return hb_empty_t (); + + hb_closure_context_t::return_t ret = closure_glyphs_recurse_func (c, lookup_index, covered_seq_indices, seq_index, end_index); + + /* While in theory we should flush here, it will cause timeouts because a recursive + * lookup can keep growing the glyph set. Skip, and outer loop will retry up to + * HB_CLOSURE_MAX_STAGES time, which should be enough for every realistic font. */ + //c->flush (); + + return ret; + } + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { return Lookup::dispatch<SubTable> (c, std::forward<Ts> (ds)...); } + + bool subset (hb_subset_context_t *c) const + { return Lookup::subset<SubTable> (c); } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SUBSTLOOKUP_HH */ diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookupSubTable.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookupSubTable.hh new file mode 100644 index 0000000000..a525fba039 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SubstLookupSubTable.hh @@ -0,0 +1,77 @@ +#ifndef OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH +#define OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH + +#include "Common.hh" +#include "SingleSubst.hh" +#include "MultipleSubst.hh" +#include "AlternateSubst.hh" +#include "LigatureSubst.hh" +#include "ContextSubst.hh" +#include "ChainContextSubst.hh" +#include "ExtensionSubst.hh" +#include "ReverseChainSingleSubst.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SubstLookupSubTable +{ + friend struct ::OT::Lookup; + friend struct SubstLookup; + + protected: + union { + SingleSubst single; + MultipleSubst multiple; + AlternateSubst alternate; + LigatureSubst ligature; + ContextSubst context; + ChainContextSubst chainContext; + ExtensionSubst extension; + ReverseChainSingleSubst reverseChainContextSingle; + } u; + public: + DEFINE_SIZE_MIN (0); + + enum Type { + Single = 1, + Multiple = 2, + Alternate = 3, + Ligature = 4, + Context = 5, + ChainContext = 6, + Extension = 7, + ReverseChainSingle = 8 + }; + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type, Ts&&... ds) const + { + TRACE_DISPATCH (this, lookup_type); + switch (lookup_type) { + case Single: return_trace (u.single.dispatch (c, std::forward<Ts> (ds)...)); + case Multiple: return_trace (u.multiple.dispatch (c, std::forward<Ts> (ds)...)); + case Alternate: return_trace (u.alternate.dispatch (c, std::forward<Ts> (ds)...)); + case Ligature: return_trace (u.ligature.dispatch (c, std::forward<Ts> (ds)...)); + case Context: return_trace (u.context.dispatch (c, std::forward<Ts> (ds)...)); + case ChainContext: return_trace (u.chainContext.dispatch (c, std::forward<Ts> (ds)...)); + case Extension: return_trace (u.extension.dispatch (c, std::forward<Ts> (ds)...)); + case ReverseChainSingle: return_trace (u.reverseChainContextSingle.dispatch (c, std::forward<Ts> (ds)...)); + default: return_trace (c->default_return_value ()); + } + } + + bool intersects (const hb_set_t *glyphs, unsigned int lookup_type) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c, lookup_type); + } +}; + + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH */ |