TtfTypes.h (10847B)
1 /* GRAPHITE2 LICENSING 2 3 Copyright 2010, SIL International 4 All rights reserved. 5 6 This library is free software; you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published 8 by the Free Software Foundation; either version 2.1 of License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should also have received a copy of the GNU Lesser General Public 17 License along with this library in the file named "LICENSE". 18 If not, write to the Free Software Foundation, 51 Franklin Street, 19 Suite 500, Boston, MA 02110-1335, USA or visit their web page on the 20 internet at http://www.fsf.org/licenses/lgpl.html. 21 22 Alternatively, the contents of this file may be used under the terms of the 23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public 24 License, as published by the Free Software Foundation, either version 2 25 of the License or (at your option) any later version. 26 */ 27 #pragma once 28 /*--------------------------------------------------------------------*//*:Ignore this sentence. 29 30 File: TtfTypes.h 31 Responsibility: Tim Eves 32 Last reviewed: Not yet. 33 34 Description: 35 Provides types required to represent the TTF basic types. 36 -------------------------------------------------------------------------------*//*:End Ignore*/ 37 38 39 //********************************************************************************************** 40 // Include files 41 //********************************************************************************************** 42 namespace graphite2 43 { 44 namespace TtfUtil 45 { 46 //********************************************************************************************** 47 // Forward declarations 48 //********************************************************************************************** 49 50 51 //********************************************************************************************** 52 // Type declarations 53 //********************************************************************************************** 54 typedef unsigned char uint8; 55 typedef uint8 byte; 56 typedef signed char int8; 57 typedef unsigned short uint16; 58 typedef short int16; 59 typedef unsigned int uint32; 60 typedef int int32; 61 62 typedef int16 short_frac; 63 typedef int32 fixed; 64 typedef int16 fword; 65 typedef uint16 ufword; 66 typedef int16 f2dot14; 67 typedef uint32 long_date_time[2]; 68 69 //********************************************************************************************** 70 // Constants and enum types 71 //**********************************************************************************************/ 72 enum 73 { 74 OneFix = 1<<16 75 }; 76 77 //********************************************************************************************** 78 // Table declarations 79 //********************************************************************************************** 80 namespace Sfnt 81 { 82 #pragma pack(push,1) // We need this or the structure members aren't aligned 83 // correctly. Fortunately this form of pragma is supposed 84 // to be recognised by VS C++ too (at least according to 85 // MSDN). 86 87 struct OffsetSubTable 88 { 89 uint32 scaler_type; 90 uint16 num_tables, 91 search_range, 92 entry_selector, 93 range_shift; 94 struct Entry 95 { 96 uint32 tag, 97 checksum, 98 offset, 99 length; 100 } table_directory[1]; 101 102 enum ScalerType 103 { 104 TrueTypeMac = 0x74727565U, 105 TrueTypeWin = 0x00010000U, 106 Type1 = 0x74797031U 107 }; 108 }; 109 110 111 112 113 struct CharacterCodeMap 114 { 115 uint16 version, 116 num_subtables; 117 struct 118 { 119 uint16 platform_id, 120 platform_specific_id; 121 uint32 offset; 122 } encoding[1]; 123 }; 124 125 struct CmapSubTable 126 { 127 uint16 format, 128 length, 129 language; 130 }; 131 132 struct CmapSubTableFormat4 : CmapSubTable 133 { 134 uint16 seg_count_x2, 135 search_range, 136 entry_selector, 137 range_shift, 138 end_code[1]; 139 // There are arrarys after this which need their 140 // start positions calculated since end_code is 141 // seg_count uint16s long. 142 }; 143 144 struct CmapSubTableFormat12 145 { 146 fixed format; 147 uint32 length, 148 language, 149 num_groups; 150 struct 151 { 152 uint32 start_char_code, 153 end_char_code, 154 start_glyph_id; 155 } group[1]; 156 }; 157 158 159 160 struct FontHeader 161 { 162 fixed version, 163 font_revision; 164 uint32 check_sum_adjustment, 165 magic_number; 166 uint16 flags, 167 units_per_em; 168 long_date_time created, 169 modified; 170 fword x_min, 171 y_min, 172 x_max, 173 y_max; 174 uint16 mac_style, 175 lowest_rec_ppem; 176 int16 font_direction_hint, 177 index_to_loc_format, 178 glyph_data_format; 179 enum 180 { 181 MagicNumber = 0x5F0F3CF5, 182 GlypDataFormat = 0 183 }; 184 enum {ShortIndexLocFormat, LongIndexLocFormat}; 185 }; 186 187 188 189 190 struct PostScriptGlyphName 191 { 192 fixed format, 193 italic_angle; 194 fword underline_position, 195 underline_thickness; 196 uint32 is_fixed_pitch, 197 min_mem_type42, 198 max_mem_type42, 199 min_mem_type1, 200 max_mem_type1; 201 enum 202 { 203 Format1 = 0x10000, 204 Format2 = 0x20000, 205 Format25 = 0x28000, 206 Format3 = 0x30000, 207 Format4 = 0x40000 208 }; 209 }; 210 211 struct PostScriptGlyphName2 : PostScriptGlyphName 212 { 213 uint16 number_of_glyphs, 214 glyph_name_index[1]; 215 }; 216 217 struct PostScriptGlyphName25 : PostScriptGlyphName 218 { 219 uint16 number_of_glyphs; 220 int8 offset[1]; 221 }; 222 223 struct PostScriptGlyphName3 : PostScriptGlyphName {}; 224 225 struct PostScriptGlyphName4 : PostScriptGlyphName 226 { 227 uint16 glyph_to_char_map[1]; 228 }; 229 230 231 struct HorizontalHeader 232 { 233 fixed version; 234 fword ascent, 235 descent, 236 line_gap; 237 ufword advance_width_max; 238 fword min_left_side_bearing, 239 max_left_side_bearing, 240 x_max_element; 241 int16 caret_slope_rise, 242 caret_slope_run; 243 fword caret_offset; 244 int16 reserved[4], 245 metric_data_format; 246 uint16 num_long_hor_metrics; 247 }; 248 249 struct MaximumProfile 250 { 251 fixed version; 252 uint16 num_glyphs, 253 max_points, 254 max_contours, 255 max_component_points, 256 max_component_contours, 257 max_zones, 258 max_twilight_points, 259 max_storage, 260 max_function_defs, 261 max_instruction_defs, 262 max_stack_elements, 263 max_size_of_instructions, 264 max_component_elements, 265 max_component_depth; 266 }; 267 268 269 typedef byte Panose[10]; 270 271 struct Compatibility0 272 { 273 uint16 version; 274 int16 x_avg_char_width; 275 uint16 weight_class, 276 width_class; 277 int16 fs_type, 278 y_subscript_x_size, 279 y_subscript_y_size, 280 y_subscript_x_offset, 281 y_subscript_y_offset, 282 y_superscript_x_size, 283 y_superscript_y_size, 284 y_superscript_x_offset, 285 y_superscript_y_offset, 286 y_strikeout_size, 287 y_strikeout_position, 288 family_class; 289 Panose panose; 290 uint32 unicode_range[4]; 291 int8 ach_vend_id[4]; 292 uint16 fs_selection, 293 fs_first_char_index, 294 fs_last_char_index, // Acording to Apple's spec this is where v0 should end 295 typo_ascender, 296 typo_descender, 297 type_linegap, 298 win_ascent, 299 win_descent; 300 301 enum 302 { 303 Italic =0x01, 304 Underscore=0x02, 305 Negative =0x04, 306 Outlined =0x08, 307 StrikeOut =0x10, 308 Bold =0x20 309 }; 310 }; 311 312 struct Compatibility1 : Compatibility0 313 { 314 uint32 codepage_range[2]; 315 }; 316 317 struct Compatibility2 : Compatibility1 318 { 319 int16 x_height, 320 cap_height; 321 uint16 default_char, 322 break_char, 323 max_context; 324 }; 325 326 struct Compatibility3 : Compatibility2 {}; 327 328 typedef Compatibility3 Compatibility; 329 330 331 struct NameRecord 332 { 333 uint16 platform_id, 334 platform_specific_id, 335 language_id, 336 name_id, 337 length, 338 offset; 339 enum {Unicode, Mactintosh, Reserved, Microsoft}; 340 enum 341 { 342 Copyright, Family, Subfamily, UniqueSubfamily, 343 Fullname, Version, PostScript 344 }; 345 }; 346 347 struct LangTagRecord 348 { 349 uint16 length, 350 offset; 351 }; 352 353 struct FontNames 354 { 355 uint16 format, 356 count, 357 string_offset; 358 NameRecord name_record[1]; 359 }; 360 361 362 struct HorizontalMetric 363 { 364 uint16 advance_width; 365 int16 left_side_bearing; 366 }; 367 368 369 struct Glyph 370 { 371 int16 number_of_contours; 372 fword x_min, 373 y_min, 374 x_max, 375 y_max; 376 }; 377 378 struct SimpleGlyph : Glyph 379 { 380 uint16 end_pts_of_contours[1]; 381 enum 382 { 383 OnCurve = 0x01, 384 XShort = 0x02, 385 YShort = 0x04, 386 Repeat = 0x08, 387 XIsSame = 0x10, 388 XIsPos = 0x10, 389 YIsSame = 0x20, 390 YIsPos = 0x20 391 }; 392 }; 393 394 struct CompoundGlyph : Glyph 395 { 396 uint16 flags, 397 glyph_index; 398 enum 399 { 400 Arg1Arg2Words = 0x01, 401 ArgsAreXYValues = 0x02, 402 RoundXYToGrid = 0x04, 403 HaveScale = 0x08, 404 MoreComponents = 0x20, 405 HaveXAndYScale = 0x40, 406 HaveTwoByTwo = 0x80, 407 HaveInstructions = 0x100, 408 UseMyMetrics = 0x200, 409 OverlapCompund = 0x400, 410 ScaledOffset = 0x800, 411 UnscaledOffset = 0x1000 412 }; 413 }; 414 415 #pragma pack(pop) 416 } // end of namespace Sfnt 417 418 } // end of namespace TtfUtil 419 } // end of namespace graphite2