1 /* 2 * Copyright © 2018 Adobe Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Adobe Author(s): Michiharu Ariza 25 */ 26 27 #ifndef HB_OT_VORG_TABLE_HH 28 #define HB_OT_VORG_TABLE_HH 29 30 #include "hb-open-type.hh" 31 32 /* 33 * VORG -- Vertical Origin Table 34 * https://docs.microsoft.com/en-us/typography/opentype/spec/vorg 35 */ 36 #define HB_OT_TAG_VORG HB_TAG('V','O','R','G') 37 38 namespace OT { 39 40 struct VertOriginMetric 41 { cmpOT::VertOriginMetric42 int cmp (hb_codepoint_t g) const { return glyph.cmp (g); } 43 sanitizeOT::VertOriginMetric44 bool sanitize (hb_sanitize_context_t *c) const 45 { 46 TRACE_SANITIZE (this); 47 return_trace (c->check_struct (this)); 48 } 49 50 public: 51 HBGlyphID glyph; 52 FWORD vertOriginY; 53 54 public: 55 DEFINE_SIZE_STATIC (4); 56 }; 57 58 struct VORG 59 { 60 static constexpr hb_tag_t tableTag = HB_OT_TAG_VORG; 61 has_dataOT::VORG62 bool has_data () const { return version.to_int (); } 63 get_y_originOT::VORG64 int get_y_origin (hb_codepoint_t glyph) const 65 { 66 unsigned int i; 67 if (!vertYOrigins.bfind (glyph, &i)) 68 return defaultVertOriginY; 69 return vertYOrigins[i].vertOriginY; 70 } 71 72 template <typename Iterator, 73 hb_requires (hb_is_iterator (Iterator))> serializeOT::VORG74 void serialize (hb_serialize_context_t *c, 75 Iterator it, 76 FWORD defaultVertOriginY) 77 { 78 79 if (unlikely (!c->extend_min ((*this)))) return; 80 81 this->version.major = 1; 82 this->version.minor = 0; 83 84 this->defaultVertOriginY = defaultVertOriginY; 85 this->vertYOrigins.len = it.len (); 86 87 for (const auto _ : it) c->copy (_); 88 } 89 subsetOT::VORG90 bool subset (hb_subset_context_t *c) const 91 { 92 TRACE_SUBSET (this); 93 VORG *vorg_prime = c->serializer->start_embed<VORG> (); 94 if (unlikely (!c->serializer->check_success (vorg_prime))) return_trace (false); 95 96 auto it = 97 + vertYOrigins.as_array () 98 | hb_filter (c->plan->glyphset (), &VertOriginMetric::glyph) 99 | hb_map ([&] (const VertOriginMetric& _) 100 { 101 hb_codepoint_t new_glyph = HB_SET_VALUE_INVALID; 102 c->plan->new_gid_for_old_gid (_.glyph, &new_glyph); 103 104 VertOriginMetric metric; 105 metric.glyph = new_glyph; 106 metric.vertOriginY = _.vertOriginY; 107 return metric; 108 }) 109 ; 110 111 /* serialize the new table */ 112 vorg_prime->serialize (c->serializer, it, defaultVertOriginY); 113 return_trace (true); 114 } 115 sanitizeOT::VORG116 bool sanitize (hb_sanitize_context_t *c) const 117 { 118 TRACE_SANITIZE (this); 119 return_trace (c->check_struct (this) && 120 version.major == 1 && 121 vertYOrigins.sanitize (c)); 122 } 123 124 protected: 125 FixedVersion<> version; /* Version of VORG table. Set to 0x00010000u. */ 126 FWORD defaultVertOriginY; /* The default vertical origin. */ 127 SortedArrayOf<VertOriginMetric> 128 vertYOrigins; /* The array of vertical origins. */ 129 130 public: 131 DEFINE_SIZE_ARRAY(8, vertYOrigins); 132 }; 133 } /* namespace OT */ 134 135 #endif /* HB_OT_VORG_TABLE_HH */ 136