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 %d", 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 %d", 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_direction_t direction, 98 hb_codepoint_t gid, 99 hb_glyph_position_t &pos) const 100 { 101 unsigned int index = (this+coverage).get_coverage (gid); 102 if (likely (index == NOT_COVERED)) return false; 103 if (unlikely (index >= valueCount)) return false; 104 105 /* This is ugly... */ 106 hb_buffer_t buffer; 107 buffer.props.direction = direction; 108 OT::hb_ot_apply_context_t c (1, font, &buffer); 109 110 valueFormat.apply_value (&c, this, 111 &values[index * valueFormat.get_len ()], 112 pos); 113 return true; 114 } 115 116 117 template<typename Iterator, 118 typename SrcLookup, 119 hb_requires (hb_is_iterator (Iterator))> serializeOT::Layout::GPOS_impl::SinglePosFormat2120 void serialize (hb_serialize_context_t *c, 121 const SrcLookup *src, 122 Iterator it, 123 ValueFormat newFormat, 124 const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) 125 { 126 auto out = c->extend_min (this); 127 if (unlikely (!out)) return; 128 if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return; 129 if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return; 130 131 + it 132 | hb_map (hb_second) 133 | hb_apply ([&] (hb_array_t<const Value> _) 134 { src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); }) 135 ; 136 137 auto glyphs = 138 + it 139 | hb_map_retains_sorting (hb_first) 140 ; 141 142 coverage.serialize_serialize (c, glyphs); 143 } 144 subsetOT::Layout::GPOS_impl::SinglePosFormat2145 bool subset (hb_subset_context_t *c) const 146 { 147 TRACE_SUBSET (this); 148 const hb_set_t &glyphset = *c->plan->glyphset_gsub (); 149 const hb_map_t &glyph_map = *c->plan->glyph_map; 150 151 unsigned sub_length = valueFormat.get_len (); 152 auto values_array = values.as_array (valueCount * sub_length); 153 154 auto it = 155 + hb_zip (this+coverage, hb_range ((unsigned) valueCount)) 156 | hb_filter (glyphset, hb_first) 157 | hb_map_retains_sorting ([&] (const hb_pair_t<hb_codepoint_t, unsigned>& _) 158 { 159 return hb_pair (glyph_map[_.first], 160 values_array.sub_array (_.second * sub_length, 161 sub_length)); 162 }) 163 ; 164 165 bool ret = bool (it); 166 SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned); 167 return_trace (ret); 168 } 169 }; 170 171 172 } 173 } 174 } 175 176 #endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH */ 177