#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 */
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