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-rw-r--r--gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh128
1 files changed, 128 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh
new file mode 100644
index 0000000000..adec65d586
--- /dev/null
+++ b/gfx/harfbuzz/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 */