1 #ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH 2 #define OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH 3 4 #include "Common.hh" 5 6 namespace OT { 7 namespace Layout { 8 namespace GPOS_impl { 9 10 struct SinglePosFormat2 11 { 12 protected: 13 HBUINT16 format; /* Format identifier--format = 2 */ 14 Offset16To<Coverage> 15 coverage; /* Offset to Coverage table--from 16 * beginning of subtable */ 17 ValueFormat valueFormat; /* Defines the types of data in the 18 * ValueRecord */ 19 HBUINT16 valueCount; /* Number of ValueRecords */ 20 ValueRecord values; /* Array of ValueRecords--positioning 21 * values applied to glyphs */ 22 public: 23 DEFINE_SIZE_ARRAY (8, values); 24 sanitizeOT::Layout::GPOS_impl::SinglePosFormat225 bool sanitize (hb_sanitize_context_t *c) const 26 { 27 TRACE_SANITIZE (this); 28 return_trace (c->check_struct (this) && 29 coverage.sanitize (c, this) && 30 valueFormat.sanitize_values (c, this, values, valueCount)); 31 } 32 intersectsOT::Layout::GPOS_impl::SinglePosFormat233 bool intersects (const hb_set_t *glyphs) const 34 { return (this+coverage).intersects (glyphs); } 35 closure_lookupsOT::Layout::GPOS_impl::SinglePosFormat236 void closure_lookups (hb_closure_lookups_context_t *c) const {} collect_variation_indicesOT::Layout::GPOS_impl::SinglePosFormat237 void collect_variation_indices (hb_collect_variation_indices_context_t *c) const 38 { 39 if (!valueFormat.has_device ()) return; 40 41 auto it = 42 + hb_zip (this+coverage, hb_range ((unsigned) valueCount)) 43 | hb_filter (c->glyph_set, hb_first) 44 ; 45 46 if (!it) return; 47 48 unsigned sub_length = valueFormat.get_len (); 49 const hb_array_t<const Value> values_array = values.as_array (valueCount * sub_length); 50 51 for (unsigned i : + it 52 | hb_map (hb_second)) 53 valueFormat.collect_variation_indices (c, this, values_array.sub_array (i * sub_length, sub_length)); 54 55 } 56 collect_glyphsOT::Layout::GPOS_impl::SinglePosFormat257 void collect_glyphs (hb_collect_glyphs_context_t *c) const 58 { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; } 59 get_coverageOT::Layout::GPOS_impl::SinglePosFormat260 const Coverage &get_coverage () const { return this+coverage; } 61 get_value_formatOT::Layout::GPOS_impl::SinglePosFormat262 ValueFormat get_value_format () const { return valueFormat; } 63 applyOT::Layout::GPOS_impl::SinglePosFormat264 bool apply (hb_ot_apply_context_t *c) const 65 { 66 TRACE_APPLY (this); 67 hb_buffer_t *buffer = c->buffer; 68 unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); 69 if (likely (index == NOT_COVERED)) return_trace (false); 70 71 if (unlikely (index >= valueCount)) return_trace (false); 72 73 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) 74 { 75 c->buffer->message (c->font, 76 "positioning glyph at %u", 77 c->buffer->idx); 78 } 79 80 valueFormat.apply_value (c, this, 81 &values[index * valueFormat.get_len ()], 82 buffer->cur_pos()); 83 84 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) 85 { 86 c->buffer->message (c->font, 87 "positioned glyph at %u", 88 c->buffer->idx); 89 } 90 91 buffer->idx++; 92 return_trace (true); 93 } 94 95 bool position_singleOT::Layout::GPOS_impl::SinglePosFormat296 position_single (hb_font_t *font, 97 hb_blob_t *table_blob, 98 hb_direction_t direction, 99 hb_codepoint_t gid, 100 hb_glyph_position_t &pos) const 101 { 102 unsigned int index = (this+coverage).get_coverage (gid); 103 if (likely (index == NOT_COVERED)) return false; 104 if (unlikely (index >= valueCount)) return false; 105 106 /* This is ugly... */ 107 hb_buffer_t buffer; 108 buffer.props.direction = direction; 109 OT::hb_ot_apply_context_t c (1, font, &buffer, table_blob); 110 111 valueFormat.apply_value (&c, this, 112 &values[index * valueFormat.get_len ()], 113 pos); 114 return true; 115 } 116 117 118 template<typename Iterator, 119 typename SrcLookup, 120 hb_requires (hb_is_iterator (Iterator))> serializeOT::Layout::GPOS_impl::SinglePosFormat2121 void serialize (hb_serialize_context_t *c, 122 const SrcLookup *src, 123 Iterator it, 124 ValueFormat newFormat, 125 const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) 126 { 127 auto out = c->extend_min (this); 128 if (unlikely (!out)) return; 129 if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return; 130 if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return; 131 132 + it 133 | hb_map (hb_second) 134 | hb_apply ([&] (hb_array_t<const Value> _) 135 { src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); }) 136 ; 137 138 auto glyphs = 139 + it 140 | hb_map_retains_sorting (hb_first) 141 ; 142 143 coverage.serialize_serialize (c, glyphs); 144 } 145 subsetOT::Layout::GPOS_impl::SinglePosFormat2146 bool subset (hb_subset_context_t *c) const 147 { 148 TRACE_SUBSET (this); 149 const hb_set_t &glyphset = *c->plan->glyphset_gsub (); 150 const hb_map_t &glyph_map = *c->plan->glyph_map; 151 152 unsigned sub_length = valueFormat.get_len (); 153 auto values_array = values.as_array (valueCount * sub_length); 154 155 auto it = 156 + hb_zip (this+coverage, hb_range ((unsigned) valueCount)) 157 | hb_filter (glyphset, hb_first) 158 | hb_map_retains_sorting ([&] (const hb_pair_t<hb_codepoint_t, unsigned>& _) 159 { 160 return hb_pair (glyph_map[_.first], 161 values_array.sub_array (_.second * sub_length, 162 sub_length)); 163 }) 164 ; 165 166 bool ret = bool (it); 167 SinglePos_serialize (c->serializer, this, it, &c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned); 168 return_trace (ret); 169 } 170 }; 171 172 173 } 174 } 175 } 176 177 #endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH */ 178