1 #ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH 2 #define OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH 3 4 #include "Common.hh" 5 #include "ValueFormat.hh" 6 7 namespace OT { 8 namespace Layout { 9 namespace GPOS_impl { 10 11 struct SinglePosFormat1 12 { 13 protected: 14 HBUINT16 format; /* Format identifier--format = 1 */ 15 Offset16To<Coverage> 16 coverage; /* Offset to Coverage table--from 17 * beginning of subtable */ 18 ValueFormat valueFormat; /* Defines the types of data in the 19 * ValueRecord */ 20 ValueRecord values; /* Defines positioning 21 * value(s)--applied to all glyphs in 22 * the Coverage table */ 23 public: 24 DEFINE_SIZE_ARRAY (6, values); 25 sanitizeOT::Layout::GPOS_impl::SinglePosFormat126 bool sanitize (hb_sanitize_context_t *c) const 27 { 28 TRACE_SANITIZE (this); 29 return_trace (c->check_struct (this) && 30 coverage.sanitize (c, this) && 31 /* The coverage table may use a range to represent a set 32 * of glyphs, which means a small number of bytes can 33 * generate a large glyph set. Manually modify the 34 * sanitizer max ops to take this into account. 35 * 36 * Note: This check *must* be right after coverage sanitize. */ 37 c->check_ops ((this + coverage).get_population () >> 1) && 38 valueFormat.sanitize_value (c, this, values)); 39 40 } 41 intersectsOT::Layout::GPOS_impl::SinglePosFormat142 bool intersects (const hb_set_t *glyphs) const 43 { return (this+coverage).intersects (glyphs); } 44 closure_lookupsOT::Layout::GPOS_impl::SinglePosFormat145 void closure_lookups (hb_closure_lookups_context_t *c) const {} collect_variation_indicesOT::Layout::GPOS_impl::SinglePosFormat146 void collect_variation_indices (hb_collect_variation_indices_context_t *c) const 47 { 48 if (!valueFormat.has_device ()) return; 49 50 hb_set_t intersection; 51 (this+coverage).intersect_set (*c->glyph_set, intersection); 52 if (!intersection) return; 53 54 valueFormat.collect_variation_indices (c, this, values.as_array (valueFormat.get_len ())); 55 } 56 collect_glyphsOT::Layout::GPOS_impl::SinglePosFormat157 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::SinglePosFormat160 const Coverage &get_coverage () const { return this+coverage; } 61 get_value_formatOT::Layout::GPOS_impl::SinglePosFormat162 ValueFormat get_value_format () const { return valueFormat; } 63 applyOT::Layout::GPOS_impl::SinglePosFormat164 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 (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) 72 { 73 c->buffer->message (c->font, 74 "positioning glyph at %u", 75 c->buffer->idx); 76 } 77 78 valueFormat.apply_value (c, this, values, buffer->cur_pos()); 79 80 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) 81 { 82 c->buffer->message (c->font, 83 "positioned glyph at %u", 84 c->buffer->idx); 85 } 86 87 buffer->idx++; 88 return_trace (true); 89 } 90 91 bool position_singleOT::Layout::GPOS_impl::SinglePosFormat192 position_single (hb_font_t *font, 93 hb_blob_t *table_blob, 94 hb_direction_t direction, 95 hb_codepoint_t gid, 96 hb_glyph_position_t &pos) const 97 { 98 unsigned int index = (this+coverage).get_coverage (gid); 99 if (likely (index == NOT_COVERED)) return false; 100 101 /* This is ugly... */ 102 hb_buffer_t buffer; 103 buffer.props.direction = direction; 104 OT::hb_ot_apply_context_t c (1, font, &buffer, table_blob); 105 106 valueFormat.apply_value (&c, this, values, pos); 107 return true; 108 } 109 110 template<typename Iterator, 111 typename SrcLookup, 112 hb_requires (hb_is_iterator (Iterator))> serializeOT::Layout::GPOS_impl::SinglePosFormat1113 void serialize (hb_serialize_context_t *c, 114 const SrcLookup *src, 115 Iterator it, 116 ValueFormat newFormat, 117 const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) 118 { 119 if (unlikely (!c->extend_min (this))) return; 120 if (unlikely (!c->check_assign (valueFormat, 121 newFormat, 122 HB_SERIALIZE_ERROR_INT_OVERFLOW))) return; 123 124 for (const hb_array_t<const Value>& _ : + it | hb_map (hb_second)) 125 { 126 src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); 127 // Only serialize the first entry in the iterator, the rest are assumed to 128 // be the same. 129 break; 130 } 131 132 auto glyphs = 133 + it 134 | hb_map_retains_sorting (hb_first) 135 ; 136 137 coverage.serialize_serialize (c, glyphs); 138 } 139 subsetOT::Layout::GPOS_impl::SinglePosFormat1140 bool subset (hb_subset_context_t *c) const 141 { 142 TRACE_SUBSET (this); 143 const hb_set_t &glyphset = *c->plan->glyphset_gsub (); 144 const hb_map_t &glyph_map = *c->plan->glyph_map; 145 146 hb_set_t intersection; 147 (this+coverage).intersect_set (glyphset, intersection); 148 149 auto it = 150 + hb_iter (intersection) 151 | hb_map_retains_sorting (glyph_map) 152 | hb_zip (hb_repeat (values.as_array (valueFormat.get_len ()))) 153 ; 154 155 bool ret = bool (it); 156 SinglePos_serialize (c->serializer, this, it, &c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned); 157 return_trace (ret); 158 } 159 }; 160 161 } 162 } 163 } 164 165 #endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH */ 166