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| 1 /***************************************************************************/ | |
| 2 /* */ | |
| 3 /* tttypes.h */ | |
| 4 /* */ | |
| 5 /* Basic SFNT/TrueType type definitions and interface (specification */ | |
| 6 /* only). */ | |
| 7 /* */ | |
| 8 /* Copyright 1996-2002, 2004-2008, 2012-2013 by */ | |
| 9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ | |
| 10 /* */ | |
| 11 /* This file is part of the FreeType project, and may only be used, */ | |
| 12 /* modified, and distributed under the terms of the FreeType project */ | |
| 13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ | |
| 14 /* this file you indicate that you have read the license and */ | |
| 15 /* understand and accept it fully. */ | |
| 16 /* */ | |
| 17 /***************************************************************************/ | |
| 18 | |
| 19 | |
| 20 #ifndef __TTTYPES_H__ | |
| 21 #define __TTTYPES_H__ | |
| 22 | |
| 23 | |
| 24 #include <ft2build.h> | |
| 25 #include FT_TRUETYPE_TABLES_H | |
| 26 #include FT_INTERNAL_OBJECTS_H | |
| 27 | |
| 28 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT | |
| 29 #include FT_MULTIPLE_MASTERS_H | |
| 30 #endif | |
| 31 | |
| 32 | |
| 33 FT_BEGIN_HEADER | |
| 34 | |
| 35 | |
| 36 /*************************************************************************/ | |
| 37 /*************************************************************************/ | |
| 38 /*************************************************************************/ | |
| 39 /*** ***/ | |
| 40 /*** ***/ | |
| 41 /*** REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ | |
| 42 /*** ***/ | |
| 43 /*** ***/ | |
| 44 /*************************************************************************/ | |
| 45 /*************************************************************************/ | |
| 46 /*************************************************************************/ | |
| 47 | |
| 48 | |
| 49 /*************************************************************************/ | |
| 50 /* */ | |
| 51 /* <Struct> */ | |
| 52 /* TTC_HeaderRec */ | |
| 53 /* */ | |
| 54 /* <Description> */ | |
| 55 /* TrueType collection header. This table contains the offsets of */ | |
| 56 /* the font headers of each distinct TrueType face in the file. */ | |
| 57 /* */ | |
| 58 /* <Fields> */ | |
| 59 /* tag :: Must be `ttc ' to indicate a TrueType collection. */ | |
| 60 /* */ | |
| 61 /* version :: The version number. */ | |
| 62 /* */ | |
| 63 /* count :: The number of faces in the collection. The */ | |
| 64 /* specification says this should be an unsigned long, but */ | |
| 65 /* we use a signed long since we need the value -1 for */ | |
| 66 /* specific purposes. */ | |
| 67 /* */ | |
| 68 /* offsets :: The offsets of the font headers, one per face. */ | |
| 69 /* */ | |
| 70 typedef struct TTC_HeaderRec_ | |
| 71 { | |
| 72 FT_ULong tag; | |
| 73 FT_Fixed version; | |
| 74 FT_Long count; | |
| 75 FT_ULong* offsets; | |
| 76 | |
| 77 } TTC_HeaderRec; | |
| 78 | |
| 79 | |
| 80 /*************************************************************************/ | |
| 81 /* */ | |
| 82 /* <Struct> */ | |
| 83 /* SFNT_HeaderRec */ | |
| 84 /* */ | |
| 85 /* <Description> */ | |
| 86 /* SFNT file format header. */ | |
| 87 /* */ | |
| 88 /* <Fields> */ | |
| 89 /* format_tag :: The font format tag. */ | |
| 90 /* */ | |
| 91 /* num_tables :: The number of tables in file. */ | |
| 92 /* */ | |
| 93 /* search_range :: Must be `16 * (max power of 2 <= num_tables)'. */ | |
| 94 /* */ | |
| 95 /* entry_selector :: Must be log2 of `search_range / 16'. */ | |
| 96 /* */ | |
| 97 /* range_shift :: Must be `num_tables * 16 - search_range'. */ | |
| 98 /* */ | |
| 99 typedef struct SFNT_HeaderRec_ | |
| 100 { | |
| 101 FT_ULong format_tag; | |
| 102 FT_UShort num_tables; | |
| 103 FT_UShort search_range; | |
| 104 FT_UShort entry_selector; | |
| 105 FT_UShort range_shift; | |
| 106 | |
| 107 FT_ULong offset; /* not in file */ | |
| 108 | |
| 109 } SFNT_HeaderRec, *SFNT_Header; | |
| 110 | |
| 111 | |
| 112 /*************************************************************************/ | |
| 113 /* */ | |
| 114 /* <Struct> */ | |
| 115 /* TT_TableRec */ | |
| 116 /* */ | |
| 117 /* <Description> */ | |
| 118 /* This structure describes a given table of a TrueType font. */ | |
| 119 /* */ | |
| 120 /* <Fields> */ | |
| 121 /* Tag :: A four-bytes tag describing the table. */ | |
| 122 /* */ | |
| 123 /* CheckSum :: The table checksum. This value can be ignored. */ | |
| 124 /* */ | |
| 125 /* Offset :: The offset of the table from the start of the TrueType */ | |
| 126 /* font in its resource. */ | |
| 127 /* */ | |
| 128 /* Length :: The table length (in bytes). */ | |
| 129 /* */ | |
| 130 typedef struct TT_TableRec_ | |
| 131 { | |
| 132 FT_ULong Tag; /* table type */ | |
| 133 FT_ULong CheckSum; /* table checksum */ | |
| 134 FT_ULong Offset; /* table file offset */ | |
| 135 FT_ULong Length; /* table length */ | |
| 136 | |
| 137 } TT_TableRec, *TT_Table; | |
| 138 | |
| 139 | |
| 140 /*************************************************************************/ | |
| 141 /* */ | |
| 142 /* <Struct> */ | |
| 143 /* WOFF_HeaderRec */ | |
| 144 /* */ | |
| 145 /* <Description> */ | |
| 146 /* WOFF file format header. */ | |
| 147 /* */ | |
| 148 /* <Fields> */ | |
| 149 /* See */ | |
| 150 /* */ | |
| 151 /* http://www.w3.org/TR/WOFF/#WOFFHeader */ | |
| 152 /* */ | |
| 153 typedef struct WOFF_HeaderRec_ | |
| 154 { | |
| 155 FT_ULong signature; | |
| 156 FT_ULong flavor; | |
| 157 FT_ULong length; | |
| 158 FT_UShort num_tables; | |
| 159 FT_UShort reserved; | |
| 160 FT_ULong totalSfntSize; | |
| 161 FT_UShort majorVersion; | |
| 162 FT_UShort minorVersion; | |
| 163 FT_ULong metaOffset; | |
| 164 FT_ULong metaLength; | |
| 165 FT_ULong metaOrigLength; | |
| 166 FT_ULong privOffset; | |
| 167 FT_ULong privLength; | |
| 168 | |
| 169 } WOFF_HeaderRec, *WOFF_Header; | |
| 170 | |
| 171 | |
| 172 /*************************************************************************/ | |
| 173 /* */ | |
| 174 /* <Struct> */ | |
| 175 /* WOFF_TableRec */ | |
| 176 /* */ | |
| 177 /* <Description> */ | |
| 178 /* This structure describes a given table of a WOFF font. */ | |
| 179 /* */ | |
| 180 /* <Fields> */ | |
| 181 /* Tag :: A four-bytes tag describing the table. */ | |
| 182 /* */ | |
| 183 /* Offset :: The offset of the table from the start of the WOFF */ | |
| 184 /* font in its resource. */ | |
| 185 /* */ | |
| 186 /* CompLength :: Compressed table length (in bytes). */ | |
| 187 /* */ | |
| 188 /* OrigLength :: Unompressed table length (in bytes). */ | |
| 189 /* */ | |
| 190 /* CheckSum :: The table checksum. This value can be ignored. */ | |
| 191 /* */ | |
| 192 /* OrigOffset :: The uncompressed table file offset. This value gets */ | |
| 193 /* computed while constructing the (uncompressed) SFNT */ | |
| 194 /* header. It is not contained in the WOFF file. */ | |
| 195 /* */ | |
| 196 typedef struct WOFF_TableRec_ | |
| 197 { | |
| 198 FT_ULong Tag; /* table ID */ | |
| 199 FT_ULong Offset; /* table file offset */ | |
| 200 FT_ULong CompLength; /* compressed table length */ | |
| 201 FT_ULong OrigLength; /* uncompressed table length */ | |
| 202 FT_ULong CheckSum; /* uncompressed checksum */ | |
| 203 | |
| 204 FT_ULong OrigOffset; /* uncompressed table file offset */ | |
| 205 /* (not in the WOFF file) */ | |
| 206 } WOFF_TableRec, *WOFF_Table; | |
| 207 | |
| 208 | |
| 209 /*************************************************************************/ | |
| 210 /* */ | |
| 211 /* <Struct> */ | |
| 212 /* TT_LongMetricsRec */ | |
| 213 /* */ | |
| 214 /* <Description> */ | |
| 215 /* A structure modeling the long metrics of the `hmtx' and `vmtx' */ | |
| 216 /* TrueType tables. The values are expressed in font units. */ | |
| 217 /* */ | |
| 218 /* <Fields> */ | |
| 219 /* advance :: The advance width or height for the glyph. */ | |
| 220 /* */ | |
| 221 /* bearing :: The left-side or top-side bearing for the glyph. */ | |
| 222 /* */ | |
| 223 typedef struct TT_LongMetricsRec_ | |
| 224 { | |
| 225 FT_UShort advance; | |
| 226 FT_Short bearing; | |
| 227 | |
| 228 } TT_LongMetricsRec, *TT_LongMetrics; | |
| 229 | |
| 230 | |
| 231 /*************************************************************************/ | |
| 232 /* */ | |
| 233 /* <Type> */ | |
| 234 /* TT_ShortMetrics */ | |
| 235 /* */ | |
| 236 /* <Description> */ | |
| 237 /* A simple type to model the short metrics of the `hmtx' and `vmtx' */ | |
| 238 /* tables. */ | |
| 239 /* */ | |
| 240 typedef FT_Short TT_ShortMetrics; | |
| 241 | |
| 242 | |
| 243 /*************************************************************************/ | |
| 244 /* */ | |
| 245 /* <Struct> */ | |
| 246 /* TT_NameEntryRec */ | |
| 247 /* */ | |
| 248 /* <Description> */ | |
| 249 /* A structure modeling TrueType name records. Name records are used */ | |
| 250 /* to store important strings like family name, style name, */ | |
| 251 /* copyright, etc. in _localized_ versions (i.e., language, encoding, */ | |
| 252 /* etc). */ | |
| 253 /* */ | |
| 254 /* <Fields> */ | |
| 255 /* platformID :: The ID of the name's encoding platform. */ | |
| 256 /* */ | |
| 257 /* encodingID :: The platform-specific ID for the name's encoding. */ | |
| 258 /* */ | |
| 259 /* languageID :: The platform-specific ID for the name's language. */ | |
| 260 /* */ | |
| 261 /* nameID :: The ID specifying what kind of name this is. */ | |
| 262 /* */ | |
| 263 /* stringLength :: The length of the string in bytes. */ | |
| 264 /* */ | |
| 265 /* stringOffset :: The offset to the string in the `name' table. */ | |
| 266 /* */ | |
| 267 /* string :: A pointer to the string's bytes. Note that these */ | |
| 268 /* are usually UTF-16 encoded characters. */ | |
| 269 /* */ | |
| 270 typedef struct TT_NameEntryRec_ | |
| 271 { | |
| 272 FT_UShort platformID; | |
| 273 FT_UShort encodingID; | |
| 274 FT_UShort languageID; | |
| 275 FT_UShort nameID; | |
| 276 FT_UShort stringLength; | |
| 277 FT_ULong stringOffset; | |
| 278 | |
| 279 /* this last field is not defined in the spec */ | |
| 280 /* but used by the FreeType engine */ | |
| 281 | |
| 282 FT_Byte* string; | |
| 283 | |
| 284 } TT_NameEntryRec, *TT_NameEntry; | |
| 285 | |
| 286 | |
| 287 /*************************************************************************/ | |
| 288 /* */ | |
| 289 /* <Struct> */ | |
| 290 /* TT_NameTableRec */ | |
| 291 /* */ | |
| 292 /* <Description> */ | |
| 293 /* A structure modeling the TrueType name table. */ | |
| 294 /* */ | |
| 295 /* <Fields> */ | |
| 296 /* format :: The format of the name table. */ | |
| 297 /* */ | |
| 298 /* numNameRecords :: The number of names in table. */ | |
| 299 /* */ | |
| 300 /* storageOffset :: The offset of the name table in the `name' */ | |
| 301 /* TrueType table. */ | |
| 302 /* */ | |
| 303 /* names :: An array of name records. */ | |
| 304 /* */ | |
| 305 /* stream :: the file's input stream. */ | |
| 306 /* */ | |
| 307 typedef struct TT_NameTableRec_ | |
| 308 { | |
| 309 FT_UShort format; | |
| 310 FT_UInt numNameRecords; | |
| 311 FT_UInt storageOffset; | |
| 312 TT_NameEntryRec* names; | |
| 313 FT_Stream stream; | |
| 314 | |
| 315 } TT_NameTableRec, *TT_NameTable; | |
| 316 | |
| 317 | |
| 318 /*************************************************************************/ | |
| 319 /*************************************************************************/ | |
| 320 /*************************************************************************/ | |
| 321 /*** ***/ | |
| 322 /*** ***/ | |
| 323 /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ | |
| 324 /*** ***/ | |
| 325 /*** ***/ | |
| 326 /*************************************************************************/ | |
| 327 /*************************************************************************/ | |
| 328 /*************************************************************************/ | |
| 329 | |
| 330 | |
| 331 /*************************************************************************/ | |
| 332 /* */ | |
| 333 /* <Struct> */ | |
| 334 /* TT_GaspRangeRec */ | |
| 335 /* */ | |
| 336 /* <Description> */ | |
| 337 /* A tiny structure used to model a gasp range according to the */ | |
| 338 /* TrueType specification. */ | |
| 339 /* */ | |
| 340 /* <Fields> */ | |
| 341 /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */ | |
| 342 /* */ | |
| 343 /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */ | |
| 344 /* modes to be used. */ | |
| 345 /* */ | |
| 346 typedef struct TT_GaspRangeRec_ | |
| 347 { | |
| 348 FT_UShort maxPPEM; | |
| 349 FT_UShort gaspFlag; | |
| 350 | |
| 351 } TT_GaspRangeRec, *TT_GaspRange; | |
| 352 | |
| 353 | |
| 354 #define TT_GASP_GRIDFIT 0x01 | |
| 355 #define TT_GASP_DOGRAY 0x02 | |
| 356 | |
| 357 | |
| 358 /*************************************************************************/ | |
| 359 /* */ | |
| 360 /* <Struct> */ | |
| 361 /* TT_GaspRec */ | |
| 362 /* */ | |
| 363 /* <Description> */ | |
| 364 /* A structure modeling the TrueType `gasp' table used to specify */ | |
| 365 /* grid-fitting and anti-aliasing behaviour. */ | |
| 366 /* */ | |
| 367 /* <Fields> */ | |
| 368 /* version :: The version number. */ | |
| 369 /* */ | |
| 370 /* numRanges :: The number of gasp ranges in table. */ | |
| 371 /* */ | |
| 372 /* gaspRanges :: An array of gasp ranges. */ | |
| 373 /* */ | |
| 374 typedef struct TT_Gasp_ | |
| 375 { | |
| 376 FT_UShort version; | |
| 377 FT_UShort numRanges; | |
| 378 TT_GaspRange gaspRanges; | |
| 379 | |
| 380 } TT_GaspRec; | |
| 381 | |
| 382 | |
| 383 /*************************************************************************/ | |
| 384 /*************************************************************************/ | |
| 385 /*************************************************************************/ | |
| 386 /*** ***/ | |
| 387 /*** ***/ | |
| 388 /*** EMBEDDED BITMAPS SUPPORT ***/ | |
| 389 /*** ***/ | |
| 390 /*** ***/ | |
| 391 /*************************************************************************/ | |
| 392 /*************************************************************************/ | |
| 393 /*************************************************************************/ | |
| 394 | |
| 395 | |
| 396 /*************************************************************************/ | |
| 397 /* */ | |
| 398 /* <Struct> */ | |
| 399 /* TT_SBit_MetricsRec */ | |
| 400 /* */ | |
| 401 /* <Description> */ | |
| 402 /* A structure used to hold the big metrics of a given glyph bitmap */ | |
| 403 /* in a TrueType or OpenType font. These are usually found in the */ | |
| 404 /* `EBDT' (Microsoft) or `bloc' (Apple) table. */ | |
| 405 /* */ | |
| 406 /* <Fields> */ | |
| 407 /* height :: The glyph height in pixels. */ | |
| 408 /* */ | |
| 409 /* width :: The glyph width in pixels. */ | |
| 410 /* */ | |
| 411 /* horiBearingX :: The horizontal left bearing. */ | |
| 412 /* */ | |
| 413 /* horiBearingY :: The horizontal top bearing. */ | |
| 414 /* */ | |
| 415 /* horiAdvance :: The horizontal advance. */ | |
| 416 /* */ | |
| 417 /* vertBearingX :: The vertical left bearing. */ | |
| 418 /* */ | |
| 419 /* vertBearingY :: The vertical top bearing. */ | |
| 420 /* */ | |
| 421 /* vertAdvance :: The vertical advance. */ | |
| 422 /* */ | |
| 423 typedef struct TT_SBit_MetricsRec_ | |
| 424 { | |
| 425 FT_UShort height; | |
| 426 FT_UShort width; | |
| 427 | |
| 428 FT_Short horiBearingX; | |
| 429 FT_Short horiBearingY; | |
| 430 FT_UShort horiAdvance; | |
| 431 | |
| 432 FT_Short vertBearingX; | |
| 433 FT_Short vertBearingY; | |
| 434 FT_UShort vertAdvance; | |
| 435 | |
| 436 } TT_SBit_MetricsRec, *TT_SBit_Metrics; | |
| 437 | |
| 438 | |
| 439 /*************************************************************************/ | |
| 440 /* */ | |
| 441 /* <Struct> */ | |
| 442 /* TT_SBit_SmallMetricsRec */ | |
| 443 /* */ | |
| 444 /* <Description> */ | |
| 445 /* A structure used to hold the small metrics of a given glyph bitmap */ | |
| 446 /* in a TrueType or OpenType font. These are usually found in the */ | |
| 447 /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */ | |
| 448 /* */ | |
| 449 /* <Fields> */ | |
| 450 /* height :: The glyph height in pixels. */ | |
| 451 /* */ | |
| 452 /* width :: The glyph width in pixels. */ | |
| 453 /* */ | |
| 454 /* bearingX :: The left-side bearing. */ | |
| 455 /* */ | |
| 456 /* bearingY :: The top-side bearing. */ | |
| 457 /* */ | |
| 458 /* advance :: The advance width or height. */ | |
| 459 /* */ | |
| 460 typedef struct TT_SBit_Small_Metrics_ | |
| 461 { | |
| 462 FT_Byte height; | |
| 463 FT_Byte width; | |
| 464 | |
| 465 FT_Char bearingX; | |
| 466 FT_Char bearingY; | |
| 467 FT_Byte advance; | |
| 468 | |
| 469 } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics; | |
| 470 | |
| 471 | |
| 472 /*************************************************************************/ | |
| 473 /* */ | |
| 474 /* <Struct> */ | |
| 475 /* TT_SBit_LineMetricsRec */ | |
| 476 /* */ | |
| 477 /* <Description> */ | |
| 478 /* A structure used to describe the text line metrics of a given */ | |
| 479 /* bitmap strike, for either a horizontal or vertical layout. */ | |
| 480 /* */ | |
| 481 /* <Fields> */ | |
| 482 /* ascender :: The ascender in pixels. */ | |
| 483 /* */ | |
| 484 /* descender :: The descender in pixels. */ | |
| 485 /* */ | |
| 486 /* max_width :: The maximum glyph width in pixels. */ | |
| 487 /* */ | |
| 488 /* caret_slope_enumerator :: Rise of the caret slope, typically set */ | |
| 489 /* to 1 for non-italic fonts. */ | |
| 490 /* */ | |
| 491 /* caret_slope_denominator :: Rise of the caret slope, typically set */ | |
| 492 /* to 0 for non-italic fonts. */ | |
| 493 /* */ | |
| 494 /* caret_offset :: Offset in pixels to move the caret for */ | |
| 495 /* proper positioning. */ | |
| 496 /* */ | |
| 497 /* min_origin_SB :: Minimum of horiBearingX (resp. */ | |
| 498 /* vertBearingY). */ | |
| 499 /* min_advance_SB :: Minimum of */ | |
| 500 /* */ | |
| 501 /* horizontal advance - */ | |
| 502 /* ( horiBearingX + width ) */ | |
| 503 /* */ | |
| 504 /* resp. */ | |
| 505 /* */ | |
| 506 /* vertical advance - */ | |
| 507 /* ( vertBearingY + height ) */ | |
| 508 /* */ | |
| 509 /* max_before_BL :: Maximum of horiBearingY (resp. */ | |
| 510 /* vertBearingY). */ | |
| 511 /* */ | |
| 512 /* min_after_BL :: Minimum of */ | |
| 513 /* */ | |
| 514 /* horiBearingY - height */ | |
| 515 /* */ | |
| 516 /* resp. */ | |
| 517 /* */ | |
| 518 /* vertBearingX - width */ | |
| 519 /* */ | |
| 520 /* pads :: Unused (to make the size of the record */ | |
| 521 /* a multiple of 32 bits. */ | |
| 522 /* */ | |
| 523 typedef struct TT_SBit_LineMetricsRec_ | |
| 524 { | |
| 525 FT_Char ascender; | |
| 526 FT_Char descender; | |
| 527 FT_Byte max_width; | |
| 528 FT_Char caret_slope_numerator; | |
| 529 FT_Char caret_slope_denominator; | |
| 530 FT_Char caret_offset; | |
| 531 FT_Char min_origin_SB; | |
| 532 FT_Char min_advance_SB; | |
| 533 FT_Char max_before_BL; | |
| 534 FT_Char min_after_BL; | |
| 535 FT_Char pads[2]; | |
| 536 | |
| 537 } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics; | |
| 538 | |
| 539 | |
| 540 /*************************************************************************/ | |
| 541 /* */ | |
| 542 /* <Struct> */ | |
| 543 /* TT_SBit_RangeRec */ | |
| 544 /* */ | |
| 545 /* <Description> */ | |
| 546 /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */ | |
| 547 /* (Microsoft) or `bloc' (Apple) tables. */ | |
| 548 /* */ | |
| 549 /* <Fields> */ | |
| 550 /* first_glyph :: The first glyph index in the range. */ | |
| 551 /* */ | |
| 552 /* last_glyph :: The last glyph index in the range. */ | |
| 553 /* */ | |
| 554 /* index_format :: The format of index table. Valid values are 1 */ | |
| 555 /* to 5. */ | |
| 556 /* */ | |
| 557 /* image_format :: The format of `EBDT' image data. */ | |
| 558 /* */ | |
| 559 /* image_offset :: The offset to image data in `EBDT'. */ | |
| 560 /* */ | |
| 561 /* image_size :: For index formats 2 and 5. This is the size in */ | |
| 562 /* bytes of each glyph bitmap. */ | |
| 563 /* */ | |
| 564 /* big_metrics :: For index formats 2 and 5. This is the big */ | |
| 565 /* metrics for each glyph bitmap. */ | |
| 566 /* */ | |
| 567 /* num_glyphs :: For index formats 4 and 5. This is the number of */ | |
| 568 /* glyphs in the code array. */ | |
| 569 /* */ | |
| 570 /* glyph_offsets :: For index formats 1 and 3. */ | |
| 571 /* */ | |
| 572 /* glyph_codes :: For index formats 4 and 5. */ | |
| 573 /* */ | |
| 574 /* table_offset :: The offset of the index table in the `EBLC' */ | |
| 575 /* table. Only used during strike loading. */ | |
| 576 /* */ | |
| 577 typedef struct TT_SBit_RangeRec_ | |
| 578 { | |
| 579 FT_UShort first_glyph; | |
| 580 FT_UShort last_glyph; | |
| 581 | |
| 582 FT_UShort index_format; | |
| 583 FT_UShort image_format; | |
| 584 FT_ULong image_offset; | |
| 585 | |
| 586 FT_ULong image_size; | |
| 587 TT_SBit_MetricsRec metrics; | |
| 588 FT_ULong num_glyphs; | |
| 589 | |
| 590 FT_ULong* glyph_offsets; | |
| 591 FT_UShort* glyph_codes; | |
| 592 | |
| 593 FT_ULong table_offset; | |
| 594 | |
| 595 } TT_SBit_RangeRec, *TT_SBit_Range; | |
| 596 | |
| 597 | |
| 598 /*************************************************************************/ | |
| 599 /* */ | |
| 600 /* <Struct> */ | |
| 601 /* TT_SBit_StrikeRec */ | |
| 602 /* */ | |
| 603 /* <Description> */ | |
| 604 /* A structure used describe a given bitmap strike in the `EBLC' */ | |
| 605 /* (Microsoft) or `bloc' (Apple) tables. */ | |
| 606 /* */ | |
| 607 /* <Fields> */ | |
| 608 /* num_index_ranges :: The number of index ranges. */ | |
| 609 /* */ | |
| 610 /* index_ranges :: An array of glyph index ranges. */ | |
| 611 /* */ | |
| 612 /* color_ref :: Unused. `color_ref' is put in for future */ | |
| 613 /* enhancements, but these fields are already */ | |
| 614 /* in use by other platforms (e.g. Newton). */ | |
| 615 /* For details, please see */ | |
| 616 /* */ | |
| 617 /* http://fonts.apple.com/ */ | |
| 618 /* TTRefMan/RM06/Chap6bloc.html */ | |
| 619 /* */ | |
| 620 /* hori :: The line metrics for horizontal layouts. */ | |
| 621 /* */ | |
| 622 /* vert :: The line metrics for vertical layouts. */ | |
| 623 /* */ | |
| 624 /* start_glyph :: The lowest glyph index for this strike. */ | |
| 625 /* */ | |
| 626 /* end_glyph :: The highest glyph index for this strike. */ | |
| 627 /* */ | |
| 628 /* x_ppem :: The number of horizontal pixels per EM. */ | |
| 629 /* */ | |
| 630 /* y_ppem :: The number of vertical pixels per EM. */ | |
| 631 /* */ | |
| 632 /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */ | |
| 633 /* and 8. */ | |
| 634 /* */ | |
| 635 /* flags :: Is this a vertical or horizontal strike? For */ | |
| 636 /* details, please see */ | |
| 637 /* */ | |
| 638 /* http://fonts.apple.com/ */ | |
| 639 /* TTRefMan/RM06/Chap6bloc.html */ | |
| 640 /* */ | |
| 641 typedef struct TT_SBit_StrikeRec_ | |
| 642 { | |
| 643 FT_Int num_ranges; | |
| 644 TT_SBit_Range sbit_ranges; | |
| 645 FT_ULong ranges_offset; | |
| 646 | |
| 647 FT_ULong color_ref; | |
| 648 | |
| 649 TT_SBit_LineMetricsRec hori; | |
| 650 TT_SBit_LineMetricsRec vert; | |
| 651 | |
| 652 FT_UShort start_glyph; | |
| 653 FT_UShort end_glyph; | |
| 654 | |
| 655 FT_Byte x_ppem; | |
| 656 FT_Byte y_ppem; | |
| 657 | |
| 658 FT_Byte bit_depth; | |
| 659 FT_Char flags; | |
| 660 | |
| 661 } TT_SBit_StrikeRec, *TT_SBit_Strike; | |
| 662 | |
| 663 | |
| 664 /*************************************************************************/ | |
| 665 /* */ | |
| 666 /* <Struct> */ | |
| 667 /* TT_SBit_ComponentRec */ | |
| 668 /* */ | |
| 669 /* <Description> */ | |
| 670 /* A simple structure to describe a compound sbit element. */ | |
| 671 /* */ | |
| 672 /* <Fields> */ | |
| 673 /* glyph_code :: The element's glyph index. */ | |
| 674 /* */ | |
| 675 /* x_offset :: The element's left bearing. */ | |
| 676 /* */ | |
| 677 /* y_offset :: The element's top bearing. */ | |
| 678 /* */ | |
| 679 typedef struct TT_SBit_ComponentRec_ | |
| 680 { | |
| 681 FT_UShort glyph_code; | |
| 682 FT_Char x_offset; | |
| 683 FT_Char y_offset; | |
| 684 | |
| 685 } TT_SBit_ComponentRec, *TT_SBit_Component; | |
| 686 | |
| 687 | |
| 688 /*************************************************************************/ | |
| 689 /* */ | |
| 690 /* <Struct> */ | |
| 691 /* TT_SBit_ScaleRec */ | |
| 692 /* */ | |
| 693 /* <Description> */ | |
| 694 /* A structure used describe a given bitmap scaling table, as defined */ | |
| 695 /* in the `EBSC' table. */ | |
| 696 /* */ | |
| 697 /* <Fields> */ | |
| 698 /* hori :: The horizontal line metrics. */ | |
| 699 /* */ | |
| 700 /* vert :: The vertical line metrics. */ | |
| 701 /* */ | |
| 702 /* x_ppem :: The number of horizontal pixels per EM. */ | |
| 703 /* */ | |
| 704 /* y_ppem :: The number of vertical pixels per EM. */ | |
| 705 /* */ | |
| 706 /* x_ppem_substitute :: Substitution x_ppem value. */ | |
| 707 /* */ | |
| 708 /* y_ppem_substitute :: Substitution y_ppem value. */ | |
| 709 /* */ | |
| 710 typedef struct TT_SBit_ScaleRec_ | |
| 711 { | |
| 712 TT_SBit_LineMetricsRec hori; | |
| 713 TT_SBit_LineMetricsRec vert; | |
| 714 | |
| 715 FT_Byte x_ppem; | |
| 716 FT_Byte y_ppem; | |
| 717 | |
| 718 FT_Byte x_ppem_substitute; | |
| 719 FT_Byte y_ppem_substitute; | |
| 720 | |
| 721 } TT_SBit_ScaleRec, *TT_SBit_Scale; | |
| 722 | |
| 723 | |
| 724 /*************************************************************************/ | |
| 725 /*************************************************************************/ | |
| 726 /*************************************************************************/ | |
| 727 /*** ***/ | |
| 728 /*** ***/ | |
| 729 /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ | |
| 730 /*** ***/ | |
| 731 /*** ***/ | |
| 732 /*************************************************************************/ | |
| 733 /*************************************************************************/ | |
| 734 /*************************************************************************/ | |
| 735 | |
| 736 | |
| 737 /*************************************************************************/ | |
| 738 /* */ | |
| 739 /* <Struct> */ | |
| 740 /* TT_Post_20Rec */ | |
| 741 /* */ | |
| 742 /* <Description> */ | |
| 743 /* Postscript names sub-table, format 2.0. Stores the PS name of */ | |
| 744 /* each glyph in the font face. */ | |
| 745 /* */ | |
| 746 /* <Fields> */ | |
| 747 /* num_glyphs :: The number of named glyphs in the table. */ | |
| 748 /* */ | |
| 749 /* num_names :: The number of PS names stored in the table. */ | |
| 750 /* */ | |
| 751 /* glyph_indices :: The indices of the glyphs in the names arrays. */ | |
| 752 /* */ | |
| 753 /* glyph_names :: The PS names not in Mac Encoding. */ | |
| 754 /* */ | |
| 755 typedef struct TT_Post_20Rec_ | |
| 756 { | |
| 757 FT_UShort num_glyphs; | |
| 758 FT_UShort num_names; | |
| 759 FT_UShort* glyph_indices; | |
| 760 FT_Char** glyph_names; | |
| 761 | |
| 762 } TT_Post_20Rec, *TT_Post_20; | |
| 763 | |
| 764 | |
| 765 /*************************************************************************/ | |
| 766 /* */ | |
| 767 /* <Struct> */ | |
| 768 /* TT_Post_25Rec */ | |
| 769 /* */ | |
| 770 /* <Description> */ | |
| 771 /* Postscript names sub-table, format 2.5. Stores the PS name of */ | |
| 772 /* each glyph in the font face. */ | |
| 773 /* */ | |
| 774 /* <Fields> */ | |
| 775 /* num_glyphs :: The number of glyphs in the table. */ | |
| 776 /* */ | |
| 777 /* offsets :: An array of signed offsets in a normal Mac */ | |
| 778 /* Postscript name encoding. */ | |
| 779 /* */ | |
| 780 typedef struct TT_Post_25_ | |
| 781 { | |
| 782 FT_UShort num_glyphs; | |
| 783 FT_Char* offsets; | |
| 784 | |
| 785 } TT_Post_25Rec, *TT_Post_25; | |
| 786 | |
| 787 | |
| 788 /*************************************************************************/ | |
| 789 /* */ | |
| 790 /* <Struct> */ | |
| 791 /* TT_Post_NamesRec */ | |
| 792 /* */ | |
| 793 /* <Description> */ | |
| 794 /* Postscript names table, either format 2.0 or 2.5. */ | |
| 795 /* */ | |
| 796 /* <Fields> */ | |
| 797 /* loaded :: A flag to indicate whether the PS names are loaded. */ | |
| 798 /* */ | |
| 799 /* format_20 :: The sub-table used for format 2.0. */ | |
| 800 /* */ | |
| 801 /* format_25 :: The sub-table used for format 2.5. */ | |
| 802 /* */ | |
| 803 typedef struct TT_Post_NamesRec_ | |
| 804 { | |
| 805 FT_Bool loaded; | |
| 806 | |
| 807 union | |
| 808 { | |
| 809 TT_Post_20Rec format_20; | |
| 810 TT_Post_25Rec format_25; | |
| 811 | |
| 812 } names; | |
| 813 | |
| 814 } TT_Post_NamesRec, *TT_Post_Names; | |
| 815 | |
| 816 | |
| 817 /*************************************************************************/ | |
| 818 /*************************************************************************/ | |
| 819 /*************************************************************************/ | |
| 820 /*** ***/ | |
| 821 /*** ***/ | |
| 822 /*** GX VARIATION TABLE SUPPORT ***/ | |
| 823 /*** ***/ | |
| 824 /*** ***/ | |
| 825 /*************************************************************************/ | |
| 826 /*************************************************************************/ | |
| 827 /*************************************************************************/ | |
| 828 | |
| 829 | |
| 830 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT | |
| 831 typedef struct GX_BlendRec_ *GX_Blend; | |
| 832 #endif | |
| 833 | |
| 834 /*************************************************************************/ | |
| 835 /*************************************************************************/ | |
| 836 /*************************************************************************/ | |
| 837 /*** ***/ | |
| 838 /*** ***/ | |
| 839 /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ | |
| 840 /*** ***/ | |
| 841 /*** ***/ | |
| 842 /*************************************************************************/ | |
| 843 /*************************************************************************/ | |
| 844 /*************************************************************************/ | |
| 845 | |
| 846 /* | |
| 847 * These types are used to support a `BDF ' table that isn't part of the | |
| 848 * official TrueType specification. It is mainly used in SFNT-based | |
| 849 * bitmap fonts that were generated from a set of BDF fonts. | |
| 850 * | |
| 851 * The format of the table is as follows. | |
| 852 * | |
| 853 * USHORT version `BDF ' table version number, should be 0x0001. | |
| 854 * USHORT strikeCount Number of strikes (bitmap sizes) in this table. | |
| 855 * ULONG stringTable Offset (from start of BDF table) to string | |
| 856 * table. | |
| 857 * | |
| 858 * This is followed by an array of `strikeCount' descriptors, having the | |
| 859 * following format. | |
| 860 * | |
| 861 * USHORT ppem Vertical pixels per EM for this strike. | |
| 862 * USHORT numItems Number of items for this strike (properties and | |
| 863 * atoms). Maximum is 255. | |
| 864 * | |
| 865 * This array in turn is followed by `strikeCount' value sets. Each | |
| 866 * `value set' is an array of `numItems' items with the following format. | |
| 867 * | |
| 868 * ULONG item_name Offset in string table to item name. | |
| 869 * USHORT item_type The item type. Possible values are | |
| 870 * 0 => string (e.g., COMMENT) | |
| 871 * 1 => atom (e.g., FONT or even SIZE) | |
| 872 * 2 => int32 | |
| 873 * 3 => uint32 | |
| 874 * 0x10 => A flag to indicate a properties. This | |
| 875 * is ORed with the above values. | |
| 876 * ULONG item_value For strings => Offset into string table without | |
| 877 * the corresponding double quotes. | |
| 878 * For atoms => Offset into string table. | |
| 879 * For integers => Direct value. | |
| 880 * | |
| 881 * All strings in the string table consist of bytes and are | |
| 882 * zero-terminated. | |
| 883 * | |
| 884 */ | |
| 885 | |
| 886 #ifdef TT_CONFIG_OPTION_BDF | |
| 887 | |
| 888 typedef struct TT_BDFRec_ | |
| 889 { | |
| 890 FT_Byte* table; | |
| 891 FT_Byte* table_end; | |
| 892 FT_Byte* strings; | |
| 893 FT_ULong strings_size; | |
| 894 FT_UInt num_strikes; | |
| 895 FT_Bool loaded; | |
| 896 | |
| 897 } TT_BDFRec, *TT_BDF; | |
| 898 | |
| 899 #endif /* TT_CONFIG_OPTION_BDF */ | |
| 900 | |
| 901 /*************************************************************************/ | |
| 902 /*************************************************************************/ | |
| 903 /*************************************************************************/ | |
| 904 /*** ***/ | |
| 905 /*** ***/ | |
| 906 /*** ORIGINAL TT_FACE CLASS DEFINITION ***/ | |
| 907 /*** ***/ | |
| 908 /*** ***/ | |
| 909 /*************************************************************************/ | |
| 910 /*************************************************************************/ | |
| 911 /*************************************************************************/ | |
| 912 | |
| 913 | |
| 914 /*************************************************************************/ | |
| 915 /* */ | |
| 916 /* This structure/class is defined here because it is common to the */ | |
| 917 /* following formats: TTF, OpenType-TT, and OpenType-CFF. */ | |
| 918 /* */ | |
| 919 /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */ | |
| 920 /* shared between font drivers, and are thus defined in `ttobjs.h'. */ | |
| 921 /* */ | |
| 922 /*************************************************************************/ | |
| 923 | |
| 924 | |
| 925 /*************************************************************************/ | |
| 926 /* */ | |
| 927 /* <Type> */ | |
| 928 /* TT_Face */ | |
| 929 /* */ | |
| 930 /* <Description> */ | |
| 931 /* A handle to a TrueType face/font object. A TT_Face encapsulates */ | |
| 932 /* the resolution and scaling independent parts of a TrueType font */ | |
| 933 /* resource. */ | |
| 934 /* */ | |
| 935 /* <Note> */ | |
| 936 /* The TT_Face structure is also used as a `parent class' for the */ | |
| 937 /* OpenType-CFF class (T2_Face). */ | |
| 938 /* */ | |
| 939 typedef struct TT_FaceRec_* TT_Face; | |
| 940 | |
| 941 | |
| 942 /* a function type used for the truetype bytecode interpreter hooks */ | |
| 943 typedef FT_Error | |
| 944 (*TT_Interpreter)( void* exec_context ); | |
| 945 | |
| 946 /* forward declaration */ | |
| 947 typedef struct TT_LoaderRec_* TT_Loader; | |
| 948 | |
| 949 | |
| 950 /*************************************************************************/ | |
| 951 /* */ | |
| 952 /* <FuncType> */ | |
| 953 /* TT_Loader_GotoTableFunc */ | |
| 954 /* */ | |
| 955 /* <Description> */ | |
| 956 /* Seeks a stream to the start of a given TrueType table. */ | |
| 957 /* */ | |
| 958 /* <Input> */ | |
| 959 /* face :: A handle to the target face object. */ | |
| 960 /* */ | |
| 961 /* tag :: A 4-byte tag used to name the table. */ | |
| 962 /* */ | |
| 963 /* stream :: The input stream. */ | |
| 964 /* */ | |
| 965 /* <Output> */ | |
| 966 /* length :: The length of the table in bytes. Set to 0 if not */ | |
| 967 /* needed. */ | |
| 968 /* */ | |
| 969 /* <Return> */ | |
| 970 /* FreeType error code. 0 means success. */ | |
| 971 /* */ | |
| 972 /* <Note> */ | |
| 973 /* The stream cursor must be at the font file's origin. */ | |
| 974 /* */ | |
| 975 typedef FT_Error | |
| 976 (*TT_Loader_GotoTableFunc)( TT_Face face, | |
| 977 FT_ULong tag, | |
| 978 FT_Stream stream, | |
| 979 FT_ULong* length ); | |
| 980 | |
| 981 | |
| 982 /*************************************************************************/ | |
| 983 /* */ | |
| 984 /* <FuncType> */ | |
| 985 /* TT_Loader_StartGlyphFunc */ | |
| 986 /* */ | |
| 987 /* <Description> */ | |
| 988 /* Seeks a stream to the start of a given glyph element, and opens a */ | |
| 989 /* frame for it. */ | |
| 990 /* */ | |
| 991 /* <Input> */ | |
| 992 /* loader :: The current TrueType glyph loader object. */ | |
| 993 /* */ | |
| 994 /* glyph index :: The index of the glyph to access. */ | |
| 995 /* */ | |
| 996 /* offset :: The offset of the glyph according to the */ | |
| 997 /* `locations' table. */ | |
| 998 /* */ | |
| 999 /* byte_count :: The size of the frame in bytes. */ | |
| 1000 /* */ | |
| 1001 /* <Return> */ | |
| 1002 /* FreeType error code. 0 means success. */ | |
| 1003 /* */ | |
| 1004 /* <Note> */ | |
| 1005 /* This function is normally equivalent to FT_STREAM_SEEK(offset) */ | |
| 1006 /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ | |
| 1007 /* but alternative formats (e.g. compressed ones) might use something */ | |
| 1008 /* different. */ | |
| 1009 /* */ | |
| 1010 typedef FT_Error | |
| 1011 (*TT_Loader_StartGlyphFunc)( TT_Loader loader, | |
| 1012 FT_UInt glyph_index, | |
| 1013 FT_ULong offset, | |
| 1014 FT_UInt byte_count ); | |
| 1015 | |
| 1016 | |
| 1017 /*************************************************************************/ | |
| 1018 /* */ | |
| 1019 /* <FuncType> */ | |
| 1020 /* TT_Loader_ReadGlyphFunc */ | |
| 1021 /* */ | |
| 1022 /* <Description> */ | |
| 1023 /* Reads one glyph element (its header, a simple glyph, or a */ | |
| 1024 /* composite) from the loader's current stream frame. */ | |
| 1025 /* */ | |
| 1026 /* <Input> */ | |
| 1027 /* loader :: The current TrueType glyph loader object. */ | |
| 1028 /* */ | |
| 1029 /* <Return> */ | |
| 1030 /* FreeType error code. 0 means success. */ | |
| 1031 /* */ | |
| 1032 typedef FT_Error | |
| 1033 (*TT_Loader_ReadGlyphFunc)( TT_Loader loader ); | |
| 1034 | |
| 1035 | |
| 1036 /*************************************************************************/ | |
| 1037 /* */ | |
| 1038 /* <FuncType> */ | |
| 1039 /* TT_Loader_EndGlyphFunc */ | |
| 1040 /* */ | |
| 1041 /* <Description> */ | |
| 1042 /* Closes the current loader stream frame for the glyph. */ | |
| 1043 /* */ | |
| 1044 /* <Input> */ | |
| 1045 /* loader :: The current TrueType glyph loader object. */ | |
| 1046 /* */ | |
| 1047 typedef void | |
| 1048 (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); | |
| 1049 | |
| 1050 | |
| 1051 typedef enum TT_SbitTableType_ | |
| 1052 { | |
| 1053 TT_SBIT_TABLE_TYPE_NONE = 0, | |
| 1054 TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */ | |
| 1055 /* `bloc' (Apple) */ | |
| 1056 TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */ | |
| 1057 TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */ | |
| 1058 | |
| 1059 /* do not remove */ | |
| 1060 TT_SBIT_TABLE_TYPE_MAX | |
| 1061 | |
| 1062 } TT_SbitTableType; | |
| 1063 | |
| 1064 | |
| 1065 /*************************************************************************/ | |
| 1066 /* */ | |
| 1067 /* TrueType Face Type */ | |
| 1068 /* */ | |
| 1069 /* <Struct> */ | |
| 1070 /* TT_Face */ | |
| 1071 /* */ | |
| 1072 /* <Description> */ | |
| 1073 /* The TrueType face class. These objects model the resolution and */ | |
| 1074 /* point-size independent data found in a TrueType font file. */ | |
| 1075 /* */ | |
| 1076 /* <Fields> */ | |
| 1077 /* root :: The base FT_Face structure, managed by the */ | |
| 1078 /* base layer. */ | |
| 1079 /* */ | |
| 1080 /* ttc_header :: The TrueType collection header, used when */ | |
| 1081 /* the file is a `ttc' rather than a `ttf'. */ | |
| 1082 /* For ordinary font files, the field */ | |
| 1083 /* `ttc_header.count' is set to 0. */ | |
| 1084 /* */ | |
| 1085 /* format_tag :: The font format tag. */ | |
| 1086 /* */ | |
| 1087 /* num_tables :: The number of TrueType tables in this font */ | |
| 1088 /* file. */ | |
| 1089 /* */ | |
| 1090 /* dir_tables :: The directory of TrueType tables for this */ | |
| 1091 /* font file. */ | |
| 1092 /* */ | |
| 1093 /* header :: The font's font header (`head' table). */ | |
| 1094 /* Read on font opening. */ | |
| 1095 /* */ | |
| 1096 /* horizontal :: The font's horizontal header (`hhea' */ | |
| 1097 /* table). This field also contains the */ | |
| 1098 /* associated horizontal metrics table */ | |
| 1099 /* (`hmtx'). */ | |
| 1100 /* */ | |
| 1101 /* max_profile :: The font's maximum profile table. Read on */ | |
| 1102 /* font opening. Note that some maximum */ | |
| 1103 /* values cannot be taken directly from this */ | |
| 1104 /* table. We thus define additional fields */ | |
| 1105 /* below to hold the computed maxima. */ | |
| 1106 /* */ | |
| 1107 /* vertical_info :: A boolean which is set when the font file */ | |
| 1108 /* contains vertical metrics. If not, the */ | |
| 1109 /* value of the `vertical' field is */ | |
| 1110 /* undefined. */ | |
| 1111 /* */ | |
| 1112 /* vertical :: The font's vertical header (`vhea' table). */ | |
| 1113 /* This field also contains the associated */ | |
| 1114 /* vertical metrics table (`vmtx'), if found. */ | |
| 1115 /* IMPORTANT: The contents of this field is */ | |
| 1116 /* undefined if the `verticalInfo' field is */ | |
| 1117 /* unset. */ | |
| 1118 /* */ | |
| 1119 /* num_names :: The number of name records within this */ | |
| 1120 /* TrueType font. */ | |
| 1121 /* */ | |
| 1122 /* name_table :: The table of name records (`name'). */ | |
| 1123 /* */ | |
| 1124 /* os2 :: The font's OS/2 table (`OS/2'). */ | |
| 1125 /* */ | |
| 1126 /* postscript :: The font's PostScript table (`post' */ | |
| 1127 /* table). The PostScript glyph names are */ | |
| 1128 /* not loaded by the driver on face opening. */ | |
| 1129 /* See the `ttpost' module for more details. */ | |
| 1130 /* */ | |
| 1131 /* cmap_table :: Address of the face's `cmap' SFNT table */ | |
| 1132 /* in memory (it's an extracted frame). */ | |
| 1133 /* */ | |
| 1134 /* cmap_size :: The size in bytes of the `cmap_table' */ | |
| 1135 /* described above. */ | |
| 1136 /* */ | |
| 1137 /* goto_table :: A function called by each TrueType table */ | |
| 1138 /* loader to position a stream's cursor to */ | |
| 1139 /* the start of a given table according to */ | |
| 1140 /* its tag. It defaults to TT_Goto_Face but */ | |
| 1141 /* can be different for strange formats (e.g. */ | |
| 1142 /* Type 42). */ | |
| 1143 /* */ | |
| 1144 /* access_glyph_frame :: A function used to access the frame of a */ | |
| 1145 /* given glyph within the face's font file. */ | |
| 1146 /* */ | |
| 1147 /* forget_glyph_frame :: A function used to forget the frame of a */ | |
| 1148 /* given glyph when all data has been loaded. */ | |
| 1149 /* */ | |
| 1150 /* read_glyph_header :: A function used to read a glyph header. */ | |
| 1151 /* It must be called between an `access' and */ | |
| 1152 /* `forget'. */ | |
| 1153 /* */ | |
| 1154 /* read_simple_glyph :: A function used to read a simple glyph. */ | |
| 1155 /* It must be called after the header was */ | |
| 1156 /* read, and before the `forget'. */ | |
| 1157 /* */ | |
| 1158 /* read_composite_glyph :: A function used to read a composite glyph. */ | |
| 1159 /* It must be called after the header was */ | |
| 1160 /* read, and before the `forget'. */ | |
| 1161 /* */ | |
| 1162 /* sfnt :: A pointer to the SFNT service. */ | |
| 1163 /* */ | |
| 1164 /* psnames :: A pointer to the PostScript names service. */ | |
| 1165 /* */ | |
| 1166 /* hdmx :: The face's horizontal device metrics */ | |
| 1167 /* (`hdmx' table). This table is optional in */ | |
| 1168 /* TrueType/OpenType fonts. */ | |
| 1169 /* */ | |
| 1170 /* gasp :: The grid-fitting and scaling properties */ | |
| 1171 /* table (`gasp'). This table is optional in */ | |
| 1172 /* TrueType/OpenType fonts. */ | |
| 1173 /* */ | |
| 1174 /* pclt :: The `pclt' SFNT table. */ | |
| 1175 /* */ | |
| 1176 /* num_sbit_scales :: The number of sbit scales for this font. */ | |
| 1177 /* */ | |
| 1178 /* sbit_scales :: Array of sbit scales embedded in this */ | |
| 1179 /* font. This table is optional in a */ | |
| 1180 /* TrueType/OpenType font. */ | |
| 1181 /* */ | |
| 1182 /* postscript_names :: A table used to store the Postscript names */ | |
| 1183 /* of the glyphs for this font. See the */ | |
| 1184 /* file `ttconfig.h' for comments on the */ | |
| 1185 /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ | |
| 1186 /* */ | |
| 1187 /* num_locations :: The number of glyph locations in this */ | |
| 1188 /* TrueType file. This should be */ | |
| 1189 /* identical to the number of glyphs. */ | |
| 1190 /* Ignored for Type 2 fonts. */ | |
| 1191 /* */ | |
| 1192 /* glyph_locations :: An array of longs. These are offsets to */ | |
| 1193 /* glyph data within the `glyf' table. */ | |
| 1194 /* Ignored for Type 2 font faces. */ | |
| 1195 /* */ | |
| 1196 /* glyf_len :: The length of the `glyf' table. Needed */ | |
| 1197 /* for malformed `loca' tables. */ | |
| 1198 /* */ | |
| 1199 /* font_program_size :: Size in bytecodes of the face's font */ | |
| 1200 /* program. 0 if none defined. Ignored for */ | |
| 1201 /* Type 2 fonts. */ | |
| 1202 /* */ | |
| 1203 /* font_program :: The face's font program (bytecode stream) */ | |
| 1204 /* executed at load time, also used during */ | |
| 1205 /* glyph rendering. Comes from the `fpgm' */ | |
| 1206 /* table. Ignored for Type 2 font fonts. */ | |
| 1207 /* */ | |
| 1208 /* cvt_program_size :: The size in bytecodes of the face's cvt */ | |
| 1209 /* program. Ignored for Type 2 fonts. */ | |
| 1210 /* */ | |
| 1211 /* cvt_program :: The face's cvt program (bytecode stream) */ | |
| 1212 /* executed each time an instance/size is */ | |
| 1213 /* changed/reset. Comes from the `prep' */ | |
| 1214 /* table. Ignored for Type 2 fonts. */ | |
| 1215 /* */ | |
| 1216 /* cvt_size :: Size of the control value table (in */ | |
| 1217 /* entries). Ignored for Type 2 fonts. */ | |
| 1218 /* */ | |
| 1219 /* cvt :: The face's original control value table. */ | |
| 1220 /* Coordinates are expressed in unscaled font */ | |
| 1221 /* units. Comes from the `cvt ' table. */ | |
| 1222 /* Ignored for Type 2 fonts. */ | |
| 1223 /* */ | |
| 1224 /* num_kern_pairs :: The number of kerning pairs present in the */ | |
| 1225 /* font file. The engine only loads the */ | |
| 1226 /* first horizontal format 0 kern table it */ | |
| 1227 /* finds in the font file. Ignored for */ | |
| 1228 /* Type 2 fonts. */ | |
| 1229 /* */ | |
| 1230 /* kern_table_index :: The index of the kerning table in the font */ | |
| 1231 /* kerning directory. Ignored for Type 2 */ | |
| 1232 /* fonts. */ | |
| 1233 /* */ | |
| 1234 /* interpreter :: A pointer to the TrueType bytecode */ | |
| 1235 /* interpreters field is also used to hook */ | |
| 1236 /* the debugger in `ttdebug'. */ | |
| 1237 /* */ | |
| 1238 /* unpatented_hinting :: If true, use only unpatented methods in */ | |
| 1239 /* the bytecode interpreter. */ | |
| 1240 /* */ | |
| 1241 /* doblend :: A boolean which is set if the font should */ | |
| 1242 /* be blended (this is for GX var). */ | |
| 1243 /* */ | |
| 1244 /* blend :: Contains the data needed to control GX */ | |
| 1245 /* variation tables (rather like Multiple */ | |
| 1246 /* Master data). */ | |
| 1247 /* */ | |
| 1248 /* extra :: Reserved for third-party font drivers. */ | |
| 1249 /* */ | |
| 1250 /* postscript_name :: The PS name of the font. Used by the */ | |
| 1251 /* postscript name service. */ | |
| 1252 /* */ | |
| 1253 typedef struct TT_FaceRec_ | |
| 1254 { | |
| 1255 FT_FaceRec root; | |
| 1256 | |
| 1257 TTC_HeaderRec ttc_header; | |
| 1258 | |
| 1259 FT_ULong format_tag; | |
| 1260 FT_UShort num_tables; | |
| 1261 TT_Table dir_tables; | |
| 1262 | |
| 1263 TT_Header header; /* TrueType header table */ | |
| 1264 TT_HoriHeader horizontal; /* TrueType horizontal header */ | |
| 1265 | |
| 1266 TT_MaxProfile max_profile; | |
| 1267 | |
| 1268 FT_Bool vertical_info; | |
| 1269 TT_VertHeader vertical; /* TT Vertical header, if present */ | |
| 1270 | |
| 1271 FT_UShort num_names; /* number of name records */ | |
| 1272 TT_NameTableRec name_table; /* name table */ | |
| 1273 | |
| 1274 TT_OS2 os2; /* TrueType OS/2 table */ | |
| 1275 TT_Postscript postscript; /* TrueType Postscript table */ | |
| 1276 | |
| 1277 FT_Byte* cmap_table; /* extracted `cmap' table */ | |
| 1278 FT_ULong cmap_size; | |
| 1279 | |
| 1280 TT_Loader_GotoTableFunc goto_table; | |
| 1281 | |
| 1282 TT_Loader_StartGlyphFunc access_glyph_frame; | |
| 1283 TT_Loader_EndGlyphFunc forget_glyph_frame; | |
| 1284 TT_Loader_ReadGlyphFunc read_glyph_header; | |
| 1285 TT_Loader_ReadGlyphFunc read_simple_glyph; | |
| 1286 TT_Loader_ReadGlyphFunc read_composite_glyph; | |
| 1287 | |
| 1288 /* a typeless pointer to the SFNT_Interface table used to load */ | |
| 1289 /* the basic TrueType tables in the face object */ | |
| 1290 void* sfnt; | |
| 1291 | |
| 1292 /* a typeless pointer to the FT_Service_PsCMapsRec table used to */ | |
| 1293 /* handle glyph names <-> unicode & Mac values */ | |
| 1294 void* psnames; | |
| 1295 | |
| 1296 | |
| 1297 /***********************************************************************/ | |
| 1298 /* */ | |
| 1299 /* Optional TrueType/OpenType tables */ | |
| 1300 /* */ | |
| 1301 /***********************************************************************/ | |
| 1302 | |
| 1303 /* grid-fitting and scaling table */ | |
| 1304 TT_GaspRec gasp; /* the `gasp' table */ | |
| 1305 | |
| 1306 /* PCL 5 table */ | |
| 1307 TT_PCLT pclt; | |
| 1308 | |
| 1309 /* embedded bitmaps support */ | |
| 1310 FT_ULong num_sbit_scales; | |
| 1311 TT_SBit_Scale sbit_scales; | |
| 1312 | |
| 1313 /* postscript names table */ | |
| 1314 TT_Post_NamesRec postscript_names; | |
| 1315 | |
| 1316 | |
| 1317 /***********************************************************************/ | |
| 1318 /* */ | |
| 1319 /* TrueType-specific fields (ignored by the OTF-Type2 driver) */ | |
| 1320 /* */ | |
| 1321 /***********************************************************************/ | |
| 1322 | |
| 1323 /* the font program, if any */ | |
| 1324 FT_ULong font_program_size; | |
| 1325 FT_Byte* font_program; | |
| 1326 | |
| 1327 /* the cvt program, if any */ | |
| 1328 FT_ULong cvt_program_size; | |
| 1329 FT_Byte* cvt_program; | |
| 1330 | |
| 1331 /* the original, unscaled, control value table */ | |
| 1332 FT_ULong cvt_size; | |
| 1333 FT_Short* cvt; | |
| 1334 | |
| 1335 /* A pointer to the bytecode interpreter to use. This is also */ | |
| 1336 /* used to hook the debugger for the `ttdebug' utility. */ | |
| 1337 TT_Interpreter interpreter; | |
| 1338 | |
| 1339 #ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING | |
| 1340 /* Use unpatented hinting only. */ | |
| 1341 FT_Bool unpatented_hinting; | |
| 1342 #endif | |
| 1343 | |
| 1344 /***********************************************************************/ | |
| 1345 /* */ | |
| 1346 /* Other tables or fields. This is used by derivative formats like */ | |
| 1347 /* OpenType. */ | |
| 1348 /* */ | |
| 1349 /***********************************************************************/ | |
| 1350 | |
| 1351 FT_Generic extra; | |
| 1352 | |
| 1353 const char* postscript_name; | |
| 1354 | |
| 1355 FT_ULong glyf_len; | |
| 1356 | |
| 1357 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT | |
| 1358 FT_Bool doblend; | |
| 1359 GX_Blend blend; | |
| 1360 #endif | |
| 1361 | |
| 1362 /* since version 2.2 */ | |
| 1363 | |
| 1364 FT_Byte* horz_metrics; | |
| 1365 FT_ULong horz_metrics_size; | |
| 1366 | |
| 1367 FT_Byte* vert_metrics; | |
| 1368 FT_ULong vert_metrics_size; | |
| 1369 | |
| 1370 FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ | |
| 1371 FT_Byte* glyph_locations; | |
| 1372 | |
| 1373 FT_Byte* hdmx_table; | |
| 1374 FT_ULong hdmx_table_size; | |
| 1375 FT_UInt hdmx_record_count; | |
| 1376 FT_ULong hdmx_record_size; | |
| 1377 FT_Byte* hdmx_record_sizes; | |
| 1378 | |
| 1379 FT_Byte* sbit_table; | |
| 1380 FT_ULong sbit_table_size; | |
| 1381 TT_SbitTableType sbit_table_type; | |
| 1382 FT_UInt sbit_num_strikes; | |
| 1383 | |
| 1384 FT_Byte* kern_table; | |
| 1385 FT_ULong kern_table_size; | |
| 1386 FT_UInt num_kern_tables; | |
| 1387 FT_UInt32 kern_avail_bits; | |
| 1388 FT_UInt32 kern_order_bits; | |
| 1389 | |
| 1390 #ifdef TT_CONFIG_OPTION_BDF | |
| 1391 TT_BDFRec bdf; | |
| 1392 #endif /* TT_CONFIG_OPTION_BDF */ | |
| 1393 | |
| 1394 /* since 2.3.0 */ | |
| 1395 FT_ULong horz_metrics_offset; | |
| 1396 FT_ULong vert_metrics_offset; | |
| 1397 | |
| 1398 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING | |
| 1399 /* since 2.4.12 */ | |
| 1400 FT_ULong sph_found_func_flags; /* special functions found */ | |
| 1401 /* for this face */ | |
| 1402 FT_Bool sph_compatibility_mode; | |
| 1403 #endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ | |
| 1404 | |
| 1405 } TT_FaceRec; | |
| 1406 | |
| 1407 | |
| 1408 /*************************************************************************/ | |
| 1409 /* */ | |
| 1410 /* <Struct> */ | |
| 1411 /* TT_GlyphZoneRec */ | |
| 1412 /* */ | |
| 1413 /* <Description> */ | |
| 1414 /* A glyph zone is used to load, scale and hint glyph outline */ | |
| 1415 /* coordinates. */ | |
| 1416 /* */ | |
| 1417 /* <Fields> */ | |
| 1418 /* memory :: A handle to the memory manager. */ | |
| 1419 /* */ | |
| 1420 /* max_points :: The maximum size in points of the zone. */ | |
| 1421 /* */ | |
| 1422 /* max_contours :: Max size in links contours of the zone. */ | |
| 1423 /* */ | |
| 1424 /* n_points :: The current number of points in the zone. */ | |
| 1425 /* */ | |
| 1426 /* n_contours :: The current number of contours in the zone. */ | |
| 1427 /* */ | |
| 1428 /* org :: The original glyph coordinates (font */ | |
| 1429 /* units/scaled). */ | |
| 1430 /* */ | |
| 1431 /* cur :: The current glyph coordinates (scaled/hinted). */ | |
| 1432 /* */ | |
| 1433 /* tags :: The point control tags. */ | |
| 1434 /* */ | |
| 1435 /* contours :: The contours end points. */ | |
| 1436 /* */ | |
| 1437 /* first_point :: Offset of the current subglyph's first point. */ | |
| 1438 /* */ | |
| 1439 typedef struct TT_GlyphZoneRec_ | |
| 1440 { | |
| 1441 FT_Memory memory; | |
| 1442 FT_UShort max_points; | |
| 1443 FT_UShort max_contours; | |
| 1444 FT_UShort n_points; /* number of points in zone */ | |
| 1445 FT_Short n_contours; /* number of contours */ | |
| 1446 | |
| 1447 FT_Vector* org; /* original point coordinates */ | |
| 1448 FT_Vector* cur; /* current point coordinates */ | |
| 1449 FT_Vector* orus; /* original (unscaled) point coordinates */ | |
| 1450 | |
| 1451 FT_Byte* tags; /* current touch flags */ | |
| 1452 FT_UShort* contours; /* contour end points */ | |
| 1453 | |
| 1454 FT_UShort first_point; /* offset of first (#0) point */ | |
| 1455 | |
| 1456 } TT_GlyphZoneRec, *TT_GlyphZone; | |
| 1457 | |
| 1458 | |
| 1459 /* handle to execution context */ | |
| 1460 typedef struct TT_ExecContextRec_* TT_ExecContext; | |
| 1461 | |
| 1462 /* glyph loader structure */ | |
| 1463 typedef struct TT_LoaderRec_ | |
| 1464 { | |
| 1465 FT_Face face; | |
| 1466 FT_Size size; | |
| 1467 FT_GlyphSlot glyph; | |
| 1468 FT_GlyphLoader gloader; | |
| 1469 | |
| 1470 FT_ULong load_flags; | |
| 1471 FT_UInt glyph_index; | |
| 1472 | |
| 1473 FT_Stream stream; | |
| 1474 FT_Int byte_len; | |
| 1475 | |
| 1476 FT_Short n_contours; | |
| 1477 FT_BBox bbox; | |
| 1478 FT_Int left_bearing; | |
| 1479 FT_Int advance; | |
| 1480 FT_Int linear; | |
| 1481 FT_Bool linear_def; | |
| 1482 FT_Vector pp1; | |
| 1483 FT_Vector pp2; | |
| 1484 | |
| 1485 FT_ULong glyf_offset; | |
| 1486 | |
| 1487 /* the zone where we load our glyphs */ | |
| 1488 TT_GlyphZoneRec base; | |
| 1489 TT_GlyphZoneRec zone; | |
| 1490 | |
| 1491 TT_ExecContext exec; | |
| 1492 FT_Byte* instructions; | |
| 1493 FT_ULong ins_pos; | |
| 1494 | |
| 1495 /* for possible extensibility in other formats */ | |
| 1496 void* other; | |
| 1497 | |
| 1498 /* since version 2.1.8 */ | |
| 1499 FT_Int top_bearing; | |
| 1500 FT_Int vadvance; | |
| 1501 FT_Vector pp3; | |
| 1502 FT_Vector pp4; | |
| 1503 | |
| 1504 /* since version 2.2.1 */ | |
| 1505 FT_Byte* cursor; | |
| 1506 FT_Byte* limit; | |
| 1507 | |
| 1508 } TT_LoaderRec; | |
| 1509 | |
| 1510 | |
| 1511 FT_END_HEADER | |
| 1512 | |
| 1513 #endif /* __TTTYPES_H__ */ | |
| 1514 | |
| 1515 | |
| 1516 /* END */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1413673003:
Update bundled freetype to 2.6.1 (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master