diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh | 74 |
1 files changed, 65 insertions, 9 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh index df75bb52bb..9c651abe71 100644 --- a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh +++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubstFormat2.hh @@ -5,21 +5,22 @@ namespace OT { namespace Layout { -namespace GSUB { +namespace GSUB_impl { -struct SingleSubstFormat2 +template <typename Types> +struct SingleSubstFormat2_4 { protected: HBUINT16 format; /* Format identifier--format = 2 */ - Offset16To<Coverage> + typename Types::template OffsetTo<Coverage> coverage; /* Offset to Coverage table--from * beginning of Substitution table */ - Array16Of<HBGlyphID16> + Array16Of<typename Types::HBGlyphID> substitute; /* Array of substitute * GlyphIDs--ordered by Coverage Index */ public: - DEFINE_SIZE_ARRAY (6, substitute); + DEFINE_SIZE_ARRAY (4 + Types::size, substitute); bool sanitize (hb_sanitize_context_t *c) const { @@ -35,12 +36,27 @@ struct SingleSubstFormat2 void closure (hb_closure_context_t *c) const { - + hb_zip (this+coverage, substitute) - | hb_filter (c->parent_active_glyphs (), hb_first) + 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 {} @@ -59,6 +75,31 @@ struct SingleSubstFormat2 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); @@ -67,8 +108,23 @@ struct SingleSubstFormat2 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); } @@ -103,7 +159,7 @@ struct SingleSubstFormat2 + 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 + | 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]); }) ; |