1 /* 2 * Copyright 2013 Google, 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 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #ifndef HB_OT_LAYOUT_JSTF_TABLE_HH 28 #define HB_OT_LAYOUT_JSTF_TABLE_HH 29 30 #include "hb-open-type-private.hh" 31 #include "hb-ot-layout-gpos-table.hh" 32 33 34 namespace OT { 35 36 37 /* 38 * JstfModList -- Justification Modification List Tables 39 */ 40 41 typedef IndexArray JstfModList; 42 43 44 /* 45 * JstfMax -- Justification Maximum Table 46 */ 47 48 typedef OffsetListOf<PosLookup> JstfMax; 49 50 51 /* 52 * JstfPriority -- Justification Priority Table 53 */ 54 55 struct JstfPriority 56 { 57 inline bool sanitize (hb_sanitize_context_t *c) { 58 TRACE_SANITIZE (this); 59 return TRACE_RETURN (c->check_struct (this) && 60 shrinkageEnableGSUB.sanitize (c, this) && 61 shrinkageDisableGSUB.sanitize (c, this) && 62 shrinkageEnableGPOS.sanitize (c, this) && 63 shrinkageDisableGPOS.sanitize (c, this) && 64 shrinkageJstfMax.sanitize (c, this) && 65 extensionEnableGSUB.sanitize (c, this) && 66 extensionDisableGSUB.sanitize (c, this) && 67 extensionEnableGPOS.sanitize (c, this) && 68 extensionDisableGPOS.sanitize (c, this) && 69 extensionJstfMax.sanitize (c, this)); 70 } 71 72 protected: 73 OffsetTo<JstfModList> 74 shrinkageEnableGSUB; /* Offset to Shrinkage Enable GSUB 75 * JstfModList table--from beginning of 76 * JstfPriority table--may be NULL */ 77 OffsetTo<JstfModList> 78 shrinkageDisableGSUB; /* Offset to Shrinkage Disable GSUB 79 * JstfModList table--from beginning of 80 * JstfPriority table--may be NULL */ 81 OffsetTo<JstfModList> 82 shrinkageEnableGPOS; /* Offset to Shrinkage Enable GPOS 83 * JstfModList table--from beginning of 84 * JstfPriority table--may be NULL */ 85 OffsetTo<JstfModList> 86 shrinkageDisableGPOS; /* Offset to Shrinkage Disable GPOS 87 * JstfModList table--from beginning of 88 * JstfPriority table--may be NULL */ 89 OffsetTo<JstfMax> 90 shrinkageJstfMax; /* Offset to Shrinkage JstfMax table-- 91 * from beginning of JstfPriority table 92 * --may be NULL */ 93 OffsetTo<JstfModList> 94 extensionEnableGSUB; /* Offset to Extension Enable GSUB 95 * JstfModList table--from beginning of 96 * JstfPriority table--may be NULL */ 97 OffsetTo<JstfModList> 98 extensionDisableGSUB; /* Offset to Extension Disable GSUB 99 * JstfModList table--from beginning of 100 * JstfPriority table--may be NULL */ 101 OffsetTo<JstfModList> 102 extensionEnableGPOS; /* Offset to Extension Enable GPOS 103 * JstfModList table--from beginning of 104 * JstfPriority table--may be NULL */ 105 OffsetTo<JstfModList> 106 extensionDisableGPOS; /* Offset to Extension Disable GPOS 107 * JstfModList table--from beginning of 108 * JstfPriority table--may be NULL */ 109 OffsetTo<JstfMax> 110 extensionJstfMax; /* Offset to Extension JstfMax table-- 111 * from beginning of JstfPriority table 112 * --may be NULL */ 113 114 public: 115 DEFINE_SIZE_STATIC (20); 116 }; 117 118 119 /* 120 * JstfLangSys -- Justification Language System Table 121 */ 122 123 struct JstfLangSys : OffsetListOf<JstfPriority> 124 { 125 inline bool sanitize (hb_sanitize_context_t *c, 126 const Record<JstfLangSys>::sanitize_closure_t * = NULL) { 127 TRACE_SANITIZE (this); 128 return TRACE_RETURN (OffsetListOf<JstfPriority>::sanitize (c)); 129 } 130 }; 131 132 133 /* 134 * ExtenderGlyphs -- Extender Glyph Table 135 */ 136 137 typedef SortedArrayOf<GlyphID> ExtenderGlyphs; 138 139 140 /* 141 * JstfScript -- The Justification Table 142 */ 143 144 struct JstfScript 145 { 146 inline unsigned int get_lang_sys_count (void) const 147 { return langSys.len; } 148 inline const Tag& get_lang_sys_tag (unsigned int i) const 149 { return langSys.get_tag (i); } 150 inline unsigned int get_lang_sys_tags (unsigned int start_offset, 151 unsigned int *lang_sys_count /* IN/OUT */, 152 hb_tag_t *lang_sys_tags /* OUT */) const 153 { return langSys.get_tags (start_offset, lang_sys_count, lang_sys_tags); } 154 inline const JstfLangSys& get_lang_sys (unsigned int i) const 155 { 156 if (i == Index::NOT_FOUND_INDEX) return get_default_lang_sys (); 157 return this+langSys[i].offset; 158 } 159 inline bool find_lang_sys_index (hb_tag_t tag, unsigned int *index) const 160 { return langSys.find_index (tag, index); } 161 162 inline bool has_default_lang_sys (void) const { return defaultLangSys != 0; } 163 inline const JstfLangSys& get_default_lang_sys (void) const { return this+defaultLangSys; } 164 165 inline bool sanitize (hb_sanitize_context_t *c, 166 const Record<JstfScript>::sanitize_closure_t * = NULL) { 167 TRACE_SANITIZE (this); 168 return TRACE_RETURN (extenderGlyphs.sanitize (c, this) && 169 defaultLangSys.sanitize (c, this) && 170 langSys.sanitize (c, this)); 171 } 172 173 protected: 174 OffsetTo<ExtenderGlyphs> 175 extenderGlyphs; /* Offset to ExtenderGlyph table--from beginning 176 * of JstfScript table-may be NULL */ 177 OffsetTo<JstfLangSys> 178 defaultLangSys; /* Offset to DefaultJstfLangSys table--from 179 * beginning of JstfScript table--may be Null */ 180 RecordArrayOf<JstfLangSys> 181 langSys; /* Array of JstfLangSysRecords--listed 182 * alphabetically by LangSysTag */ 183 public: 184 DEFINE_SIZE_ARRAY (6, langSys); 185 }; 186 187 188 /* 189 * JSTF -- The Justification Table 190 */ 191 192 struct JSTF 193 { 194 static const hb_tag_t tableTag = HB_OT_TAG_JSTF; 195 196 inline unsigned int get_script_count (void) const 197 { return scriptList.len; } 198 inline const Tag& get_script_tag (unsigned int i) const 199 { return scriptList.get_tag (i); } 200 inline unsigned int get_script_tags (unsigned int start_offset, 201 unsigned int *script_count /* IN/OUT */, 202 hb_tag_t *script_tags /* OUT */) const 203 { return scriptList.get_tags (start_offset, script_count, script_tags); } 204 inline const JstfScript& get_script (unsigned int i) const 205 { return this+scriptList[i].offset; } 206 inline bool find_script_index (hb_tag_t tag, unsigned int *index) const 207 { return scriptList.find_index (tag, index); } 208 209 inline bool sanitize (hb_sanitize_context_t *c) { 210 TRACE_SANITIZE (this); 211 return TRACE_RETURN (version.sanitize (c) && likely (version.major == 1) && 212 scriptList.sanitize (c, this)); 213 } 214 215 protected: 216 FixedVersion version; /* Version of the JSTF table--initially set 217 * to 0x00010000u */ 218 RecordArrayOf<JstfScript> 219 scriptList; /* Array of JstfScripts--listed 220 * alphabetically by ScriptTag */ 221 public: 222 DEFINE_SIZE_ARRAY (6, scriptList); 223 }; 224 225 226 } /* namespace OT */ 227 228 229 #endif /* HB_OT_LAYOUT_JSTF_TABLE_HH */ 230
