PairValueRecord.hh

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#ifndef OT_LAYOUT_GPOS_PAIRVALUERECORD_HH

#define OT_LAYOUT_GPOS_PAIRVALUERECORD_HH

#include "ValueFormat.hh"

namespace OT {

namespace Layout {

namespace GPOS_impl {

template <typename Types>

struct PairValueRecord

  template <typename Types2>

  friend struct PairSet;

  protected:

  typename Types::HBGlyphID

	        secondGlyph;            /* GlyphID of second glyph in the

                                         * pair--first glyph is listed in the

                                         * Coverage table */

  ValueRecord   values;                 /* Positioning data for the first glyph

                                         * followed by for second glyph */

  public:

  DEFINE_SIZE_ARRAY (Types::HBGlyphID::static_size, values);

  int cmp (hb_codepoint_t k) const

  { return secondGlyph.cmp (k); }

  struct context_t

    const ValueBase     *base;

    const ValueFormat   *valueFormats;

    const ValueFormat   *newFormats;

    unsigned            len1; /* valueFormats[0].get_len() */

    const hb_map_t      *glyph_map;

    const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map;

};

  bool subset (hb_subset_context_t *c,

               context_t *closure) const

    TRACE_SERIALIZE (this);

    auto *s = c->serializer;

    auto *out = s->start_embed (*this);

    if (unlikely (!s->extend_min (out))) return_trace (false);

    out->secondGlyph = (*closure->glyph_map)[secondGlyph];

    closure->valueFormats[0].copy_values (s,

                                          closure->newFormats[0],

                                          closure->base, &values[0],

                                          closure->layout_variation_idx_delta_map);

    closure->valueFormats[1].copy_values (s,

                                          closure->newFormats[1],

                                          closure->base,

                                          &values[closure->len1],

                                          closure->layout_variation_idx_delta_map);

    return_trace (true);

  void collect_variation_indices (hb_collect_variation_indices_context_t *c,

                                  const ValueFormat *valueFormats,

                                  const ValueBase *base) const

    unsigned record1_len = valueFormats[0].get_len ();

    unsigned record2_len = valueFormats[1].get_len ();

    const hb_array_t<const Value> values_array = values.as_array (record1_len + record2_len);

    if (valueFormats[0].has_device ())

      valueFormats[0].collect_variation_indices (c, base, values_array.sub_array (0, record1_len));

    if (valueFormats[1].has_device ())

      valueFormats[1].collect_variation_indices (c, base, values_array.sub_array (record1_len, record2_len));

  bool intersects (const hb_set_t& glyphset) const

    return glyphset.has(secondGlyph);

  const Value* get_values_1 () const

    return &values[0];

  const Value* get_values_2 (ValueFormat format1) const

    return &values[format1.get_len ()];

};

#endif  // OT_LAYOUT_GPOS_PAIRVALUERECORD_HH