2022-07-07 22:06:44 +02:00
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#ifndef OT_LAYOUT_GPOS_PAIRSET_HH
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#define OT_LAYOUT_GPOS_PAIRSET_HH
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#include "PairValueRecord.hh"
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namespace OT {
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namespace Layout {
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namespace GPOS_impl {
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2022-07-08 00:27:49 +02:00
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template <typename Types>
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2022-07-07 22:06:44 +02:00
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struct PairSet
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{
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2022-07-08 00:27:49 +02:00
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template <typename Types2>
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friend struct PairPosFormat1_3;
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using PairValueRecord = GPOS_impl::PairValueRecord<Types>;
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2022-07-07 22:06:44 +02:00
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2022-07-08 00:11:15 +02:00
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protected:
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HBUINT16 len; /* Number of PairValueRecords */
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PairValueRecord firstPairValueRecord;
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/* Array of PairValueRecords--ordered
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* by GlyphID of the second glyph */
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public:
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DEFINE_SIZE_MIN (2);
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struct sanitize_closure_t
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{
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const ValueFormat *valueFormats;
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unsigned int len1; /* valueFormats[0].get_len() */
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unsigned int stride; /* 1 + len1 + len2 */
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};
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bool sanitize (hb_sanitize_context_t *c, const sanitize_closure_t *closure) const
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{
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TRACE_SANITIZE (this);
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if (!(c->check_struct (this)
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&& c->check_range (&firstPairValueRecord,
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len,
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HBUINT16::static_size,
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closure->stride))) return_trace (false);
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unsigned int count = len;
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const PairValueRecord *record = &firstPairValueRecord;
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return_trace (closure->valueFormats[0].sanitize_values_stride_unsafe (c, this, &record->values[0], count, closure->stride) &&
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closure->valueFormats[1].sanitize_values_stride_unsafe (c, this, &record->values[closure->len1], count, closure->stride));
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}
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2022-07-07 22:06:44 +02:00
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bool intersects (const hb_set_t *glyphs,
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const ValueFormat *valueFormats) const
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{
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unsigned int len1 = valueFormats[0].get_len ();
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unsigned int len2 = valueFormats[1].get_len ();
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unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2);
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const PairValueRecord *record = &firstPairValueRecord;
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unsigned int count = len;
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for (unsigned int i = 0; i < count; i++)
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{
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if (glyphs->has (record->secondGlyph))
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return true;
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record = &StructAtOffset<const PairValueRecord> (record, record_size);
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}
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return false;
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}
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void collect_glyphs (hb_collect_glyphs_context_t *c,
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const ValueFormat *valueFormats) const
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{
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unsigned int len1 = valueFormats[0].get_len ();
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unsigned int len2 = valueFormats[1].get_len ();
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unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2);
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const PairValueRecord *record = &firstPairValueRecord;
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c->input->add_array (&record->secondGlyph, len, record_size);
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}
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void collect_variation_indices (hb_collect_variation_indices_context_t *c,
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const ValueFormat *valueFormats) const
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{
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unsigned len1 = valueFormats[0].get_len ();
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unsigned len2 = valueFormats[1].get_len ();
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unsigned record_size = HBUINT16::static_size * (1 + len1 + len2);
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const PairValueRecord *record = &firstPairValueRecord;
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unsigned count = len;
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for (unsigned i = 0; i < count; i++)
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{
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if (c->glyph_set->has (record->secondGlyph))
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{ record->collect_variation_indices (c, valueFormats, this); }
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record = &StructAtOffset<const PairValueRecord> (record, record_size);
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}
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}
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bool apply (hb_ot_apply_context_t *c,
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const ValueFormat *valueFormats,
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unsigned int pos) const
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{
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TRACE_APPLY (this);
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hb_buffer_t *buffer = c->buffer;
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unsigned int len1 = valueFormats[0].get_len ();
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unsigned int len2 = valueFormats[1].get_len ();
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unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2);
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const PairValueRecord *record = hb_bsearch (buffer->info[pos].codepoint,
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&firstPairValueRecord,
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len,
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record_size);
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if (record)
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{
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2022-07-25 01:14:09 +02:00
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if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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{
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c->buffer->message (c->font,
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"kerning glyphs at %d,%d",
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c->buffer->idx, pos);
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}
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2022-07-07 22:06:44 +02:00
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bool applied_first = valueFormats[0].apply_value (c, this, &record->values[0], buffer->cur_pos());
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bool applied_second = valueFormats[1].apply_value (c, this, &record->values[len1], buffer->pos[pos]);
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if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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{
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c->buffer->message (c->font,
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"kerned glyphs at %d,%d",
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c->buffer->idx, pos);
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}
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2022-07-07 22:06:44 +02:00
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if (applied_first || applied_second)
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buffer->unsafe_to_break (buffer->idx, pos + 1);
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if (len2)
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pos++;
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2022-07-25 01:14:09 +02:00
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2022-07-07 22:06:44 +02:00
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buffer->idx = pos;
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return_trace (true);
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}
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buffer->unsafe_to_concat (buffer->idx, pos + 1);
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return_trace (false);
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}
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bool subset (hb_subset_context_t *c,
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const ValueFormat valueFormats[2],
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const ValueFormat newFormats[2]) const
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{
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TRACE_SUBSET (this);
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auto snap = c->serializer->snapshot ();
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auto *out = c->serializer->start_embed (*this);
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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out->len = 0;
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const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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const hb_map_t &glyph_map = *c->plan->glyph_map;
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unsigned len1 = valueFormats[0].get_len ();
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unsigned len2 = valueFormats[1].get_len ();
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unsigned record_size = HBUINT16::static_size + Value::static_size * (len1 + len2);
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2022-07-08 00:27:49 +02:00
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typename PairValueRecord::context_t context =
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{
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this,
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valueFormats,
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newFormats,
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len1,
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&glyph_map,
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c->plan->layout_variation_idx_map
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};
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const PairValueRecord *record = &firstPairValueRecord;
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unsigned count = len, num = 0;
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for (unsigned i = 0; i < count; i++)
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{
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if (glyphset.has (record->secondGlyph)
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&& record->subset (c, &context)) num++;
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record = &StructAtOffset<const PairValueRecord> (record, record_size);
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}
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out->len = num;
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if (!num) c->serializer->revert (snap);
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return_trace (num);
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}
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};
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}
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}
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}
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2022-07-07 22:51:37 +02:00
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#endif // OT_LAYOUT_GPOS_PAIRSET_HH
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