5172
+ − 1 /***************************************************************************/
+ − 2 /* */
+ − 3 /* freetype.h */
+ − 4 /* */
+ − 5 /* FreeType high-level API and common types (specification only). */
+ − 6 /* */
+ − 7 /* Copyright 1996-2011 by */
+ − 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
+ − 9 /* */
+ − 10 /* This file is part of the FreeType project, and may only be used, */
+ − 11 /* modified, and distributed under the terms of the FreeType project */
+ − 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+ − 13 /* this file you indicate that you have read the license and */
+ − 14 /* understand and accept it fully. */
+ − 15 /* */
+ − 16 /***************************************************************************/
+ − 17
+ − 18
+ − 19 #ifndef FT_FREETYPE_H
+ − 20 #error "`ft2build.h' hasn't been included yet!"
+ − 21 #error "Please always use macros to include FreeType header files."
+ − 22 #error "Example:"
+ − 23 #error " #include <ft2build.h>"
+ − 24 #error " #include FT_FREETYPE_H"
+ − 25 #endif
+ − 26
+ − 27
+ − 28 #ifndef __FREETYPE_H__
+ − 29 #define __FREETYPE_H__
+ − 30
+ − 31
+ − 32 #include <ft2build.h>
+ − 33 #include FT_CONFIG_CONFIG_H
+ − 34 #include FT_ERRORS_H
+ − 35 #include FT_TYPES_H
+ − 36
+ − 37
+ − 38 FT_BEGIN_HEADER
+ − 39
+ − 40
+ − 41
+ − 42 /*************************************************************************/
+ − 43 /* */
+ − 44 /* <Section> */
+ − 45 /* user_allocation */
+ − 46 /* */
+ − 47 /* <Title> */
+ − 48 /* User allocation */
+ − 49 /* */
+ − 50 /* <Abstract> */
+ − 51 /* How client applications should allocate FreeType data structures. */
+ − 52 /* */
+ − 53 /* <Description> */
+ − 54 /* FreeType assumes that structures allocated by the user and passed */
+ − 55 /* as arguments are zeroed out except for the actual data. In other */
+ − 56 /* words, it is recommended to use `calloc' (or variants of it) */
+ − 57 /* instead of `malloc' for allocation. */
+ − 58 /* */
+ − 59 /*************************************************************************/
+ − 60
+ − 61
+ − 62
+ − 63 /*************************************************************************/
+ − 64 /*************************************************************************/
+ − 65 /* */
+ − 66 /* B A S I C T Y P E S */
+ − 67 /* */
+ − 68 /*************************************************************************/
+ − 69 /*************************************************************************/
+ − 70
+ − 71
+ − 72 /*************************************************************************/
+ − 73 /* */
+ − 74 /* <Section> */
+ − 75 /* base_interface */
+ − 76 /* */
+ − 77 /* <Title> */
+ − 78 /* Base Interface */
+ − 79 /* */
+ − 80 /* <Abstract> */
+ − 81 /* The FreeType~2 base font interface. */
+ − 82 /* */
+ − 83 /* <Description> */
+ − 84 /* This section describes the public high-level API of FreeType~2. */
+ − 85 /* */
+ − 86 /* <Order> */
+ − 87 /* FT_Library */
+ − 88 /* FT_Face */
+ − 89 /* FT_Size */
+ − 90 /* FT_GlyphSlot */
+ − 91 /* FT_CharMap */
+ − 92 /* FT_Encoding */
+ − 93 /* */
+ − 94 /* FT_FaceRec */
+ − 95 /* */
+ − 96 /* FT_FACE_FLAG_SCALABLE */
+ − 97 /* FT_FACE_FLAG_FIXED_SIZES */
+ − 98 /* FT_FACE_FLAG_FIXED_WIDTH */
+ − 99 /* FT_FACE_FLAG_HORIZONTAL */
+ − 100 /* FT_FACE_FLAG_VERTICAL */
+ − 101 /* FT_FACE_FLAG_SFNT */
+ − 102 /* FT_FACE_FLAG_KERNING */
+ − 103 /* FT_FACE_FLAG_MULTIPLE_MASTERS */
+ − 104 /* FT_FACE_FLAG_GLYPH_NAMES */
+ − 105 /* FT_FACE_FLAG_EXTERNAL_STREAM */
+ − 106 /* FT_FACE_FLAG_FAST_GLYPHS */
+ − 107 /* FT_FACE_FLAG_HINTER */
+ − 108 /* */
+ − 109 /* FT_STYLE_FLAG_BOLD */
+ − 110 /* FT_STYLE_FLAG_ITALIC */
+ − 111 /* */
+ − 112 /* FT_SizeRec */
+ − 113 /* FT_Size_Metrics */
+ − 114 /* */
+ − 115 /* FT_GlyphSlotRec */
+ − 116 /* FT_Glyph_Metrics */
+ − 117 /* FT_SubGlyph */
+ − 118 /* */
+ − 119 /* FT_Bitmap_Size */
+ − 120 /* */
+ − 121 /* FT_Init_FreeType */
+ − 122 /* FT_Done_FreeType */
+ − 123 /* */
+ − 124 /* FT_New_Face */
+ − 125 /* FT_Done_Face */
+ − 126 /* FT_New_Memory_Face */
+ − 127 /* FT_Open_Face */
+ − 128 /* FT_Open_Args */
+ − 129 /* FT_Parameter */
+ − 130 /* FT_Attach_File */
+ − 131 /* FT_Attach_Stream */
+ − 132 /* */
+ − 133 /* FT_Set_Char_Size */
+ − 134 /* FT_Set_Pixel_Sizes */
+ − 135 /* FT_Request_Size */
+ − 136 /* FT_Select_Size */
+ − 137 /* FT_Size_Request_Type */
+ − 138 /* FT_Size_Request */
+ − 139 /* FT_Set_Transform */
+ − 140 /* FT_Load_Glyph */
+ − 141 /* FT_Get_Char_Index */
+ − 142 /* FT_Get_Name_Index */
+ − 143 /* FT_Load_Char */
+ − 144 /* */
+ − 145 /* FT_OPEN_MEMORY */
+ − 146 /* FT_OPEN_STREAM */
+ − 147 /* FT_OPEN_PATHNAME */
+ − 148 /* FT_OPEN_DRIVER */
+ − 149 /* FT_OPEN_PARAMS */
+ − 150 /* */
+ − 151 /* FT_LOAD_DEFAULT */
+ − 152 /* FT_LOAD_RENDER */
+ − 153 /* FT_LOAD_MONOCHROME */
+ − 154 /* FT_LOAD_LINEAR_DESIGN */
+ − 155 /* FT_LOAD_NO_SCALE */
+ − 156 /* FT_LOAD_NO_HINTING */
+ − 157 /* FT_LOAD_NO_BITMAP */
+ − 158 /* FT_LOAD_CROP_BITMAP */
+ − 159 /* */
+ − 160 /* FT_LOAD_VERTICAL_LAYOUT */
+ − 161 /* FT_LOAD_IGNORE_TRANSFORM */
+ − 162 /* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
+ − 163 /* FT_LOAD_FORCE_AUTOHINT */
+ − 164 /* FT_LOAD_NO_RECURSE */
+ − 165 /* FT_LOAD_PEDANTIC */
+ − 166 /* */
+ − 167 /* FT_LOAD_TARGET_NORMAL */
+ − 168 /* FT_LOAD_TARGET_LIGHT */
+ − 169 /* FT_LOAD_TARGET_MONO */
+ − 170 /* FT_LOAD_TARGET_LCD */
+ − 171 /* FT_LOAD_TARGET_LCD_V */
+ − 172 /* */
+ − 173 /* FT_Render_Glyph */
+ − 174 /* FT_Render_Mode */
+ − 175 /* FT_Get_Kerning */
+ − 176 /* FT_Kerning_Mode */
+ − 177 /* FT_Get_Track_Kerning */
+ − 178 /* FT_Get_Glyph_Name */
+ − 179 /* FT_Get_Postscript_Name */
+ − 180 /* */
+ − 181 /* FT_CharMapRec */
+ − 182 /* FT_Select_Charmap */
+ − 183 /* FT_Set_Charmap */
+ − 184 /* FT_Get_Charmap_Index */
+ − 185 /* */
+ − 186 /* FT_FSTYPE_INSTALLABLE_EMBEDDING */
+ − 187 /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING */
+ − 188 /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING */
+ − 189 /* FT_FSTYPE_EDITABLE_EMBEDDING */
+ − 190 /* FT_FSTYPE_NO_SUBSETTING */
+ − 191 /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY */
+ − 192 /* */
+ − 193 /* FT_Get_FSType_Flags */
+ − 194 /* */
+ − 195 /*************************************************************************/
+ − 196
+ − 197
+ − 198 /*************************************************************************/
+ − 199 /* */
+ − 200 /* <Struct> */
+ − 201 /* FT_Glyph_Metrics */
+ − 202 /* */
+ − 203 /* <Description> */
+ − 204 /* A structure used to model the metrics of a single glyph. The */
+ − 205 /* values are expressed in 26.6 fractional pixel format; if the flag */
+ − 206 /* @FT_LOAD_NO_SCALE has been used while loading the glyph, values */
+ − 207 /* are expressed in font units instead. */
+ − 208 /* */
+ − 209 /* <Fields> */
+ − 210 /* width :: */
+ − 211 /* The glyph's width. */
+ − 212 /* */
+ − 213 /* height :: */
+ − 214 /* The glyph's height. */
+ − 215 /* */
+ − 216 /* horiBearingX :: */
+ − 217 /* Left side bearing for horizontal layout. */
+ − 218 /* */
+ − 219 /* horiBearingY :: */
+ − 220 /* Top side bearing for horizontal layout. */
+ − 221 /* */
+ − 222 /* horiAdvance :: */
+ − 223 /* Advance width for horizontal layout. */
+ − 224 /* */
+ − 225 /* vertBearingX :: */
+ − 226 /* Left side bearing for vertical layout. */
+ − 227 /* */
+ − 228 /* vertBearingY :: */
+ − 229 /* Top side bearing for vertical layout. */
+ − 230 /* */
+ − 231 /* vertAdvance :: */
+ − 232 /* Advance height for vertical layout. */
+ − 233 /* */
+ − 234 /* <Note> */
+ − 235 /* If not disabled with @FT_LOAD_NO_HINTING, the values represent */
+ − 236 /* dimensions of the hinted glyph (in case hinting is applicable). */
+ − 237 /* */
+ − 238 typedef struct FT_Glyph_Metrics_
+ − 239 {
+ − 240 FT_Pos width;
+ − 241 FT_Pos height;
+ − 242
+ − 243 FT_Pos horiBearingX;
+ − 244 FT_Pos horiBearingY;
+ − 245 FT_Pos horiAdvance;
+ − 246
+ − 247 FT_Pos vertBearingX;
+ − 248 FT_Pos vertBearingY;
+ − 249 FT_Pos vertAdvance;
+ − 250
+ − 251 } FT_Glyph_Metrics;
+ − 252
+ − 253
+ − 254 /*************************************************************************/
+ − 255 /* */
+ − 256 /* <Struct> */
+ − 257 /* FT_Bitmap_Size */
+ − 258 /* */
+ − 259 /* <Description> */
+ − 260 /* This structure models the metrics of a bitmap strike (i.e., a set */
+ − 261 /* of glyphs for a given point size and resolution) in a bitmap font. */
+ − 262 /* It is used for the `available_sizes' field of @FT_Face. */
+ − 263 /* */
+ − 264 /* <Fields> */
+ − 265 /* height :: The vertical distance, in pixels, between two */
+ − 266 /* consecutive baselines. It is always positive. */
+ − 267 /* */
+ − 268 /* width :: The average width, in pixels, of all glyphs in the */
+ − 269 /* strike. */
+ − 270 /* */
+ − 271 /* size :: The nominal size of the strike in 26.6 fractional */
+ − 272 /* points. This field is not very useful. */
+ − 273 /* */
+ − 274 /* x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional */
+ − 275 /* pixels. */
+ − 276 /* */
+ − 277 /* y_ppem :: The vertical ppem (nominal height) in 26.6 fractional */
+ − 278 /* pixels. */
+ − 279 /* */
+ − 280 /* <Note> */
+ − 281 /* Windows FNT: */
+ − 282 /* The nominal size given in a FNT font is not reliable. Thus when */
+ − 283 /* the driver finds it incorrect, it sets `size' to some calculated */
+ − 284 /* values and sets `x_ppem' and `y_ppem' to the pixel width and */
+ − 285 /* height given in the font, respectively. */
+ − 286 /* */
+ − 287 /* TrueType embedded bitmaps: */
+ − 288 /* `size', `width', and `height' values are not contained in the */
+ − 289 /* bitmap strike itself. They are computed from the global font */
+ − 290 /* parameters. */
+ − 291 /* */
+ − 292 typedef struct FT_Bitmap_Size_
+ − 293 {
+ − 294 FT_Short height;
+ − 295 FT_Short width;
+ − 296
+ − 297 FT_Pos size;
+ − 298
+ − 299 FT_Pos x_ppem;
+ − 300 FT_Pos y_ppem;
+ − 301
+ − 302 } FT_Bitmap_Size;
+ − 303
+ − 304
+ − 305 /*************************************************************************/
+ − 306 /*************************************************************************/
+ − 307 /* */
+ − 308 /* O B J E C T C L A S S E S */
+ − 309 /* */
+ − 310 /*************************************************************************/
+ − 311 /*************************************************************************/
+ − 312
+ − 313 /*************************************************************************/
+ − 314 /* */
+ − 315 /* <Type> */
+ − 316 /* FT_Library */
+ − 317 /* */
+ − 318 /* <Description> */
+ − 319 /* A handle to a FreeType library instance. Each `library' is */
+ − 320 /* completely independent from the others; it is the `root' of a set */
+ − 321 /* of objects like fonts, faces, sizes, etc. */
+ − 322 /* */
+ − 323 /* It also embeds a memory manager (see @FT_Memory), as well as a */
+ − 324 /* scan-line converter object (see @FT_Raster). */
+ − 325 /* */
+ − 326 /* For multi-threading applications each thread should have its own */
+ − 327 /* FT_Library object. */
+ − 328 /* */
+ − 329 /* <Note> */
+ − 330 /* Library objects are normally created by @FT_Init_FreeType, and */
+ − 331 /* destroyed with @FT_Done_FreeType. */
+ − 332 /* */
+ − 333 typedef struct FT_LibraryRec_ *FT_Library;
+ − 334
+ − 335
+ − 336 /*************************************************************************/
+ − 337 /* */
+ − 338 /* <Type> */
+ − 339 /* FT_Module */
+ − 340 /* */
+ − 341 /* <Description> */
+ − 342 /* A handle to a given FreeType module object. Each module can be a */
+ − 343 /* font driver, a renderer, or anything else that provides services */
+ − 344 /* to the formers. */
+ − 345 /* */
+ − 346 typedef struct FT_ModuleRec_* FT_Module;
+ − 347
+ − 348
+ − 349 /*************************************************************************/
+ − 350 /* */
+ − 351 /* <Type> */
+ − 352 /* FT_Driver */
+ − 353 /* */
+ − 354 /* <Description> */
+ − 355 /* A handle to a given FreeType font driver object. Each font driver */
+ − 356 /* is a special module capable of creating faces from font files. */
+ − 357 /* */
+ − 358 typedef struct FT_DriverRec_* FT_Driver;
+ − 359
+ − 360
+ − 361 /*************************************************************************/
+ − 362 /* */
+ − 363 /* <Type> */
+ − 364 /* FT_Renderer */
+ − 365 /* */
+ − 366 /* <Description> */
+ − 367 /* A handle to a given FreeType renderer. A renderer is a special */
+ − 368 /* module in charge of converting a glyph image to a bitmap, when */
+ − 369 /* necessary. Each renderer supports a given glyph image format, and */
+ − 370 /* one or more target surface depths. */
+ − 371 /* */
+ − 372 typedef struct FT_RendererRec_* FT_Renderer;
+ − 373
+ − 374
+ − 375 /*************************************************************************/
+ − 376 /* */
+ − 377 /* <Type> */
+ − 378 /* FT_Face */
+ − 379 /* */
+ − 380 /* <Description> */
+ − 381 /* A handle to a given typographic face object. A face object models */
+ − 382 /* a given typeface, in a given style. */
+ − 383 /* */
+ − 384 /* <Note> */
+ − 385 /* Each face object also owns a single @FT_GlyphSlot object, as well */
+ − 386 /* as one or more @FT_Size objects. */
+ − 387 /* */
+ − 388 /* Use @FT_New_Face or @FT_Open_Face to create a new face object from */
+ − 389 /* a given filepathname or a custom input stream. */
+ − 390 /* */
+ − 391 /* Use @FT_Done_Face to destroy it (along with its slot and sizes). */
+ − 392 /* */
+ − 393 /* <Also> */
+ − 394 /* See @FT_FaceRec for the publicly accessible fields of a given face */
+ − 395 /* object. */
+ − 396 /* */
+ − 397 typedef struct FT_FaceRec_* FT_Face;
+ − 398
+ − 399
+ − 400 /*************************************************************************/
+ − 401 /* */
+ − 402 /* <Type> */
+ − 403 /* FT_Size */
+ − 404 /* */
+ − 405 /* <Description> */
+ − 406 /* A handle to an object used to model a face scaled to a given */
+ − 407 /* character size. */
+ − 408 /* */
+ − 409 /* <Note> */
+ − 410 /* Each @FT_Face has an _active_ @FT_Size object that is used by */
+ − 411 /* functions like @FT_Load_Glyph to determine the scaling */
+ − 412 /* transformation which is used to load and hint glyphs and metrics. */
+ − 413 /* */
+ − 414 /* You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes, */
+ − 415 /* @FT_Request_Size or even @FT_Select_Size to change the content */
+ − 416 /* (i.e., the scaling values) of the active @FT_Size. */
+ − 417 /* */
+ − 418 /* You can use @FT_New_Size to create additional size objects for a */
+ − 419 /* given @FT_Face, but they won't be used by other functions until */
+ − 420 /* you activate it through @FT_Activate_Size. Only one size can be */
+ − 421 /* activated at any given time per face. */
+ − 422 /* */
+ − 423 /* <Also> */
+ − 424 /* See @FT_SizeRec for the publicly accessible fields of a given size */
+ − 425 /* object. */
+ − 426 /* */
+ − 427 typedef struct FT_SizeRec_* FT_Size;
+ − 428
+ − 429
+ − 430 /*************************************************************************/
+ − 431 /* */
+ − 432 /* <Type> */
+ − 433 /* FT_GlyphSlot */
+ − 434 /* */
+ − 435 /* <Description> */
+ − 436 /* A handle to a given `glyph slot'. A slot is a container where it */
+ − 437 /* is possible to load any of the glyphs contained in its parent */
+ − 438 /* face. */
+ − 439 /* */
+ − 440 /* In other words, each time you call @FT_Load_Glyph or */
+ − 441 /* @FT_Load_Char, the slot's content is erased by the new glyph data, */
+ − 442 /* i.e., the glyph's metrics, its image (bitmap or outline), and */
+ − 443 /* other control information. */
+ − 444 /* */
+ − 445 /* <Also> */
+ − 446 /* See @FT_GlyphSlotRec for the publicly accessible glyph fields. */
+ − 447 /* */
+ − 448 typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
+ − 449
+ − 450
+ − 451 /*************************************************************************/
+ − 452 /* */
+ − 453 /* <Type> */
+ − 454 /* FT_CharMap */
+ − 455 /* */
+ − 456 /* <Description> */
+ − 457 /* A handle to a given character map. A charmap is used to translate */
+ − 458 /* character codes in a given encoding into glyph indexes for its */
+ − 459 /* parent's face. Some font formats may provide several charmaps per */
+ − 460 /* font. */
+ − 461 /* */
+ − 462 /* Each face object owns zero or more charmaps, but only one of them */
+ − 463 /* can be `active' and used by @FT_Get_Char_Index or @FT_Load_Char. */
+ − 464 /* */
+ − 465 /* The list of available charmaps in a face is available through the */
+ − 466 /* `face->num_charmaps' and `face->charmaps' fields of @FT_FaceRec. */
+ − 467 /* */
+ − 468 /* The currently active charmap is available as `face->charmap'. */
+ − 469 /* You should call @FT_Set_Charmap to change it. */
+ − 470 /* */
+ − 471 /* <Note> */
+ − 472 /* When a new face is created (either through @FT_New_Face or */
+ − 473 /* @FT_Open_Face), the library looks for a Unicode charmap within */
+ − 474 /* the list and automatically activates it. */
+ − 475 /* */
+ − 476 /* <Also> */
+ − 477 /* See @FT_CharMapRec for the publicly accessible fields of a given */
+ − 478 /* character map. */
+ − 479 /* */
+ − 480 typedef struct FT_CharMapRec_* FT_CharMap;
+ − 481
+ − 482
+ − 483 /*************************************************************************/
+ − 484 /* */
+ − 485 /* <Macro> */
+ − 486 /* FT_ENC_TAG */
+ − 487 /* */
+ − 488 /* <Description> */
+ − 489 /* This macro converts four-letter tags into an unsigned long. It is */
+ − 490 /* used to define `encoding' identifiers (see @FT_Encoding). */
+ − 491 /* */
+ − 492 /* <Note> */
+ − 493 /* Since many 16-bit compilers don't like 32-bit enumerations, you */
+ − 494 /* should redefine this macro in case of problems to something like */
+ − 495 /* this: */
+ − 496 /* */
+ − 497 /* { */
+ − 498 /* #define FT_ENC_TAG( value, a, b, c, d ) value */
+ − 499 /* } */
+ − 500 /* */
+ − 501 /* to get a simple enumeration without assigning special numbers. */
+ − 502 /* */
+ − 503
+ − 504 #ifndef FT_ENC_TAG
+ − 505 #define FT_ENC_TAG( value, a, b, c, d ) \
+ − 506 value = ( ( (FT_UInt32)(a) << 24 ) | \
+ − 507 ( (FT_UInt32)(b) << 16 ) | \
+ − 508 ( (FT_UInt32)(c) << 8 ) | \
+ − 509 (FT_UInt32)(d) )
+ − 510
+ − 511 #endif /* FT_ENC_TAG */
+ − 512
+ − 513
+ − 514 /*************************************************************************/
+ − 515 /* */
+ − 516 /* <Enum> */
+ − 517 /* FT_Encoding */
+ − 518 /* */
+ − 519 /* <Description> */
+ − 520 /* An enumeration used to specify character sets supported by */
+ − 521 /* charmaps. Used in the @FT_Select_Charmap API function. */
+ − 522 /* */
+ − 523 /* <Note> */
+ − 524 /* Despite the name, this enumeration lists specific character */
+ − 525 /* repertories (i.e., charsets), and not text encoding methods (e.g., */
+ − 526 /* UTF-8, UTF-16, etc.). */
+ − 527 /* */
+ − 528 /* Other encodings might be defined in the future. */
+ − 529 /* */
+ − 530 /* <Values> */
+ − 531 /* FT_ENCODING_NONE :: */
+ − 532 /* The encoding value~0 is reserved. */
+ − 533 /* */
+ − 534 /* FT_ENCODING_UNICODE :: */
+ − 535 /* Corresponds to the Unicode character set. This value covers */
+ − 536 /* all versions of the Unicode repertoire, including ASCII and */
+ − 537 /* Latin-1. Most fonts include a Unicode charmap, but not all */
+ − 538 /* of them. */
+ − 539 /* */
+ − 540 /* For example, if you want to access Unicode value U+1F028 (and */
+ − 541 /* the font contains it), use value 0x1F028 as the input value for */
+ − 542 /* @FT_Get_Char_Index. */
+ − 543 /* */
+ − 544 /* FT_ENCODING_MS_SYMBOL :: */
+ − 545 /* Corresponds to the Microsoft Symbol encoding, used to encode */
+ − 546 /* mathematical symbols in the 32..255 character code range. For */
+ − 547 /* more information, see `http://www.ceviz.net/symbol.htm'. */
+ − 548 /* */
+ − 549 /* FT_ENCODING_SJIS :: */
+ − 550 /* Corresponds to Japanese SJIS encoding. More info at */
+ − 551 /* at `http://langsupport.japanreference.com/encoding.shtml'. */
+ − 552 /* See note on multi-byte encodings below. */
+ − 553 /* */
+ − 554 /* FT_ENCODING_GB2312 :: */
+ − 555 /* Corresponds to an encoding system for Simplified Chinese as used */
+ − 556 /* used in mainland China. */
+ − 557 /* */
+ − 558 /* FT_ENCODING_BIG5 :: */
+ − 559 /* Corresponds to an encoding system for Traditional Chinese as */
+ − 560 /* used in Taiwan and Hong Kong. */
+ − 561 /* */
+ − 562 /* FT_ENCODING_WANSUNG :: */
+ − 563 /* Corresponds to the Korean encoding system known as Wansung. */
+ − 564 /* For more information see */
+ − 565 /* `http://www.microsoft.com/typography/unicode/949.txt'. */
+ − 566 /* */
+ − 567 /* FT_ENCODING_JOHAB :: */
+ − 568 /* The Korean standard character set (KS~C 5601-1992), which */
+ − 569 /* corresponds to MS Windows code page 1361. This character set */
+ − 570 /* includes all possible Hangeul character combinations. */
+ − 571 /* */
+ − 572 /* FT_ENCODING_ADOBE_LATIN_1 :: */
+ − 573 /* Corresponds to a Latin-1 encoding as defined in a Type~1 */
+ − 574 /* PostScript font. It is limited to 256 character codes. */
+ − 575 /* */
+ − 576 /* FT_ENCODING_ADOBE_STANDARD :: */
+ − 577 /* Corresponds to the Adobe Standard encoding, as found in Type~1, */
+ − 578 /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
+ − 579 /* codes. */
+ − 580 /* */
+ − 581 /* FT_ENCODING_ADOBE_EXPERT :: */
+ − 582 /* Corresponds to the Adobe Expert encoding, as found in Type~1, */
+ − 583 /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
+ − 584 /* codes. */
+ − 585 /* */
+ − 586 /* FT_ENCODING_ADOBE_CUSTOM :: */
+ − 587 /* Corresponds to a custom encoding, as found in Type~1, CFF, and */
+ − 588 /* OpenType/CFF fonts. It is limited to 256 character codes. */
+ − 589 /* */
+ − 590 /* FT_ENCODING_APPLE_ROMAN :: */
+ − 591 /* Corresponds to the 8-bit Apple roman encoding. Many TrueType */
+ − 592 /* and OpenType fonts contain a charmap for this encoding, since */
+ − 593 /* older versions of Mac OS are able to use it. */
+ − 594 /* */
+ − 595 /* FT_ENCODING_OLD_LATIN_2 :: */
+ − 596 /* This value is deprecated and was never used nor reported by */
+ − 597 /* FreeType. Don't use or test for it. */
+ − 598 /* */
+ − 599 /* FT_ENCODING_MS_SJIS :: */
+ − 600 /* Same as FT_ENCODING_SJIS. Deprecated. */
+ − 601 /* */
+ − 602 /* FT_ENCODING_MS_GB2312 :: */
+ − 603 /* Same as FT_ENCODING_GB2312. Deprecated. */
+ − 604 /* */
+ − 605 /* FT_ENCODING_MS_BIG5 :: */
+ − 606 /* Same as FT_ENCODING_BIG5. Deprecated. */
+ − 607 /* */
+ − 608 /* FT_ENCODING_MS_WANSUNG :: */
+ − 609 /* Same as FT_ENCODING_WANSUNG. Deprecated. */
+ − 610 /* */
+ − 611 /* FT_ENCODING_MS_JOHAB :: */
+ − 612 /* Same as FT_ENCODING_JOHAB. Deprecated. */
+ − 613 /* */
+ − 614 /* <Note> */
+ − 615 /* By default, FreeType automatically synthesizes a Unicode charmap */
+ − 616 /* for PostScript fonts, using their glyph names dictionaries. */
+ − 617 /* However, it also reports the encodings defined explicitly in the */
+ − 618 /* font file, for the cases when they are needed, with the Adobe */
+ − 619 /* values as well. */
+ − 620 /* */
+ − 621 /* FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap */
+ − 622 /* is neither Unicode nor ISO-8859-1 (otherwise it is set to */
+ − 623 /* FT_ENCODING_UNICODE). Use @FT_Get_BDF_Charset_ID to find out */
+ − 624 /* which encoding is really present. If, for example, the */
+ − 625 /* `cs_registry' field is `KOI8' and the `cs_encoding' field is `R', */
+ − 626 /* the font is encoded in KOI8-R. */
+ − 627 /* */
+ − 628 /* FT_ENCODING_NONE is always set (with a single exception) by the */
+ − 629 /* winfonts driver. Use @FT_Get_WinFNT_Header and examine the */
+ − 630 /* `charset' field of the @FT_WinFNT_HeaderRec structure to find out */
+ − 631 /* which encoding is really present. For example, */
+ − 632 /* @FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for */
+ − 633 /* Russian). */
+ − 634 /* */
+ − 635 /* FT_ENCODING_NONE is set if `platform_id' is @TT_PLATFORM_MACINTOSH */
+ − 636 /* and `encoding_id' is not @TT_MAC_ID_ROMAN (otherwise it is set to */
+ − 637 /* FT_ENCODING_APPLE_ROMAN). */
+ − 638 /* */
+ − 639 /* If `platform_id' is @TT_PLATFORM_MACINTOSH, use the function */
+ − 640 /* @FT_Get_CMap_Language_ID to query the Mac language ID which may */
+ − 641 /* be needed to be able to distinguish Apple encoding variants. See */
+ − 642 /* */
+ − 643 /* http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/README.TXT */
+ − 644 /* */
+ − 645 /* to get an idea how to do that. Basically, if the language ID */
+ − 646 /* is~0, don't use it, otherwise subtract 1 from the language ID. */
+ − 647 /* Then examine `encoding_id'. If, for example, `encoding_id' is */
+ − 648 /* @TT_MAC_ID_ROMAN and the language ID (minus~1) is */
+ − 649 /* `TT_MAC_LANGID_GREEK', it is the Greek encoding, not Roman. */
+ − 650 /* @TT_MAC_ID_ARABIC with `TT_MAC_LANGID_FARSI' means the Farsi */
+ − 651 /* variant the Arabic encoding. */
+ − 652 /* */
+ − 653 typedef enum FT_Encoding_
+ − 654 {
+ − 655 FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
+ − 656
+ − 657 FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
+ − 658 FT_ENC_TAG( FT_ENCODING_UNICODE, 'u', 'n', 'i', 'c' ),
+ − 659
+ − 660 FT_ENC_TAG( FT_ENCODING_SJIS, 's', 'j', 'i', 's' ),
+ − 661 FT_ENC_TAG( FT_ENCODING_GB2312, 'g', 'b', ' ', ' ' ),
+ − 662 FT_ENC_TAG( FT_ENCODING_BIG5, 'b', 'i', 'g', '5' ),
+ − 663 FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
+ − 664 FT_ENC_TAG( FT_ENCODING_JOHAB, 'j', 'o', 'h', 'a' ),
+ − 665
+ − 666 /* for backwards compatibility */
+ − 667 FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS,
+ − 668 FT_ENCODING_MS_GB2312 = FT_ENCODING_GB2312,
+ − 669 FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5,
+ − 670 FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
+ − 671 FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB,
+ − 672
+ − 673 FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
+ − 674 FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT, 'A', 'D', 'B', 'E' ),
+ − 675 FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM, 'A', 'D', 'B', 'C' ),
+ − 676 FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1, 'l', 'a', 't', '1' ),
+ − 677
+ − 678 FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),
+ − 679
+ − 680 FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )
+ − 681
+ − 682 } FT_Encoding;
+ − 683
+ − 684
+ − 685 /*************************************************************************/
+ − 686 /* */
+ − 687 /* <Enum> */
+ − 688 /* ft_encoding_xxx */
+ − 689 /* */
+ − 690 /* <Description> */
+ − 691 /* These constants are deprecated; use the corresponding @FT_Encoding */
+ − 692 /* values instead. */
+ − 693 /* */
+ − 694 #define ft_encoding_none FT_ENCODING_NONE
+ − 695 #define ft_encoding_unicode FT_ENCODING_UNICODE
+ − 696 #define ft_encoding_symbol FT_ENCODING_MS_SYMBOL
+ − 697 #define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1
+ − 698 #define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2
+ − 699 #define ft_encoding_sjis FT_ENCODING_SJIS
+ − 700 #define ft_encoding_gb2312 FT_ENCODING_GB2312
+ − 701 #define ft_encoding_big5 FT_ENCODING_BIG5
+ − 702 #define ft_encoding_wansung FT_ENCODING_WANSUNG
+ − 703 #define ft_encoding_johab FT_ENCODING_JOHAB
+ − 704
+ − 705 #define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD
+ − 706 #define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT
+ − 707 #define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM
+ − 708 #define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
+ − 709
+ − 710
+ − 711 /*************************************************************************/
+ − 712 /* */
+ − 713 /* <Struct> */
+ − 714 /* FT_CharMapRec */
+ − 715 /* */
+ − 716 /* <Description> */
+ − 717 /* The base charmap structure. */
+ − 718 /* */
+ − 719 /* <Fields> */
+ − 720 /* face :: A handle to the parent face object. */
+ − 721 /* */
+ − 722 /* encoding :: An @FT_Encoding tag identifying the charmap. Use */
+ − 723 /* this with @FT_Select_Charmap. */
+ − 724 /* */
+ − 725 /* platform_id :: An ID number describing the platform for the */
+ − 726 /* following encoding ID. This comes directly from */
+ − 727 /* the TrueType specification and should be emulated */
+ − 728 /* for other formats. */
+ − 729 /* */
+ − 730 /* encoding_id :: A platform specific encoding number. This also */
+ − 731 /* comes from the TrueType specification and should be */
+ − 732 /* emulated similarly. */
+ − 733 /* */
+ − 734 typedef struct FT_CharMapRec_
+ − 735 {
+ − 736 FT_Face face;
+ − 737 FT_Encoding encoding;
+ − 738 FT_UShort platform_id;
+ − 739 FT_UShort encoding_id;
+ − 740
+ − 741 } FT_CharMapRec;
+ − 742
+ − 743
+ − 744 /*************************************************************************/
+ − 745 /*************************************************************************/
+ − 746 /* */
+ − 747 /* B A S E O B J E C T C L A S S E S */
+ − 748 /* */
+ − 749 /*************************************************************************/
+ − 750 /*************************************************************************/
+ − 751
+ − 752
+ − 753 /*************************************************************************/
+ − 754 /* */
+ − 755 /* <Type> */
+ − 756 /* FT_Face_Internal */
+ − 757 /* */
+ − 758 /* <Description> */
+ − 759 /* An opaque handle to an `FT_Face_InternalRec' structure, used to */
+ − 760 /* model private data of a given @FT_Face object. */
+ − 761 /* */
+ − 762 /* This structure might change between releases of FreeType~2 and is */
+ − 763 /* not generally available to client applications. */
+ − 764 /* */
+ − 765 typedef struct FT_Face_InternalRec_* FT_Face_Internal;
+ − 766
+ − 767
+ − 768 /*************************************************************************/
+ − 769 /* */
+ − 770 /* <Struct> */
+ − 771 /* FT_FaceRec */
+ − 772 /* */
+ − 773 /* <Description> */
+ − 774 /* FreeType root face class structure. A face object models a */
+ − 775 /* typeface in a font file. */
+ − 776 /* */
+ − 777 /* <Fields> */
+ − 778 /* num_faces :: The number of faces in the font file. Some */
+ − 779 /* font formats can have multiple faces in */
+ − 780 /* a font file. */
+ − 781 /* */
+ − 782 /* face_index :: The index of the face in the font file. It */
+ − 783 /* is set to~0 if there is only one face in */
+ − 784 /* the font file. */
+ − 785 /* */
+ − 786 /* face_flags :: A set of bit flags that give important */
+ − 787 /* information about the face; see */
+ − 788 /* @FT_FACE_FLAG_XXX for the details. */
+ − 789 /* */
+ − 790 /* style_flags :: A set of bit flags indicating the style of */
+ − 791 /* the face; see @FT_STYLE_FLAG_XXX for the */
+ − 792 /* details. */
+ − 793 /* */
+ − 794 /* num_glyphs :: The number of glyphs in the face. If the */
+ − 795 /* face is scalable and has sbits (see */
+ − 796 /* `num_fixed_sizes'), it is set to the number */
+ − 797 /* of outline glyphs. */
+ − 798 /* */
+ − 799 /* For CID-keyed fonts, this value gives the */
+ − 800 /* highest CID used in the font. */
+ − 801 /* */
+ − 802 /* family_name :: The face's family name. This is an ASCII */
+ − 803 /* string, usually in English, which describes */
+ − 804 /* the typeface's family (like `Times New */
+ − 805 /* Roman', `Bodoni', `Garamond', etc). This */
+ − 806 /* is a least common denominator used to list */
+ − 807 /* fonts. Some formats (TrueType & OpenType) */
+ − 808 /* provide localized and Unicode versions of */
+ − 809 /* this string. Applications should use the */
+ − 810 /* format specific interface to access them. */
+ − 811 /* Can be NULL (e.g., in fonts embedded in a */
+ − 812 /* PDF file). */
+ − 813 /* */
+ − 814 /* style_name :: The face's style name. This is an ASCII */
+ − 815 /* string, usually in English, which describes */
+ − 816 /* the typeface's style (like `Italic', */
+ − 817 /* `Bold', `Condensed', etc). Not all font */
+ − 818 /* formats provide a style name, so this field */
+ − 819 /* is optional, and can be set to NULL. As */
+ − 820 /* for `family_name', some formats provide */
+ − 821 /* localized and Unicode versions of this */
+ − 822 /* string. Applications should use the format */
+ − 823 /* specific interface to access them. */
+ − 824 /* */
+ − 825 /* num_fixed_sizes :: The number of bitmap strikes in the face. */
+ − 826 /* Even if the face is scalable, there might */
+ − 827 /* still be bitmap strikes, which are called */
+ − 828 /* `sbits' in that case. */
+ − 829 /* */
+ − 830 /* available_sizes :: An array of @FT_Bitmap_Size for all bitmap */
+ − 831 /* strikes in the face. It is set to NULL if */
+ − 832 /* there is no bitmap strike. */
+ − 833 /* */
+ − 834 /* num_charmaps :: The number of charmaps in the face. */
+ − 835 /* */
+ − 836 /* charmaps :: An array of the charmaps of the face. */
+ − 837 /* */
+ − 838 /* generic :: A field reserved for client uses. See the */
+ − 839 /* @FT_Generic type description. */
+ − 840 /* */
+ − 841 /* bbox :: The font bounding box. Coordinates are */
+ − 842 /* expressed in font units (see */
+ − 843 /* `units_per_EM'). The box is large enough */
+ − 844 /* to contain any glyph from the font. Thus, */
+ − 845 /* `bbox.yMax' can be seen as the `maximal */
+ − 846 /* ascender', and `bbox.yMin' as the `minimal */
+ − 847 /* descender'. Only relevant for scalable */
+ − 848 /* formats. */
+ − 849 /* */
+ − 850 /* Note that the bounding box might be off by */
+ − 851 /* (at least) one pixel for hinted fonts. See */
+ − 852 /* @FT_Size_Metrics for further discussion. */
+ − 853 /* */
+ − 854 /* units_per_EM :: The number of font units per EM square for */
+ − 855 /* this face. This is typically 2048 for */
+ − 856 /* TrueType fonts, and 1000 for Type~1 fonts. */
+ − 857 /* Only relevant for scalable formats. */
+ − 858 /* */
+ − 859 /* ascender :: The typographic ascender of the face, */
+ − 860 /* expressed in font units. For font formats */
+ − 861 /* not having this information, it is set to */
+ − 862 /* `bbox.yMax'. Only relevant for scalable */
+ − 863 /* formats. */
+ − 864 /* */
+ − 865 /* descender :: The typographic descender of the face, */
+ − 866 /* expressed in font units. For font formats */
+ − 867 /* not having this information, it is set to */
+ − 868 /* `bbox.yMin'. Note that this field is */
+ − 869 /* usually negative. Only relevant for */
+ − 870 /* scalable formats. */
+ − 871 /* */
+ − 872 /* height :: The height is the vertical distance */
+ − 873 /* between two consecutive baselines, */
+ − 874 /* expressed in font units. It is always */
+ − 875 /* positive. Only relevant for scalable */
+ − 876 /* formats. */
+ − 877 /* */
+ − 878 /* max_advance_width :: The maximal advance width, in font units, */
+ − 879 /* for all glyphs in this face. This can be */
+ − 880 /* used to make word wrapping computations */
+ − 881 /* faster. Only relevant for scalable */
+ − 882 /* formats. */
+ − 883 /* */
+ − 884 /* max_advance_height :: The maximal advance height, in font units, */
+ − 885 /* for all glyphs in this face. This is only */
+ − 886 /* relevant for vertical layouts, and is set */
+ − 887 /* to `height' for fonts that do not provide */
+ − 888 /* vertical metrics. Only relevant for */
+ − 889 /* scalable formats. */
+ − 890 /* */
+ − 891 /* underline_position :: The position, in font units, of the */
+ − 892 /* underline line for this face. It is the */
+ − 893 /* center of the underlining stem. Only */
+ − 894 /* relevant for scalable formats. */
+ − 895 /* */
+ − 896 /* underline_thickness :: The thickness, in font units, of the */
+ − 897 /* underline for this face. Only relevant for */
+ − 898 /* scalable formats. */
+ − 899 /* */
+ − 900 /* glyph :: The face's associated glyph slot(s). */
+ − 901 /* */
+ − 902 /* size :: The current active size for this face. */
+ − 903 /* */
+ − 904 /* charmap :: The current active charmap for this face. */
+ − 905 /* */
+ − 906 /* <Note> */
+ − 907 /* Fields may be changed after a call to @FT_Attach_File or */
+ − 908 /* @FT_Attach_Stream. */
+ − 909 /* */
+ − 910 typedef struct FT_FaceRec_
+ − 911 {
+ − 912 FT_Long num_faces;
+ − 913 FT_Long face_index;
+ − 914
+ − 915 FT_Long face_flags;
+ − 916 FT_Long style_flags;
+ − 917
+ − 918 FT_Long num_glyphs;
+ − 919
+ − 920 FT_String* family_name;
+ − 921 FT_String* style_name;
+ − 922
+ − 923 FT_Int num_fixed_sizes;
+ − 924 FT_Bitmap_Size* available_sizes;
+ − 925
+ − 926 FT_Int num_charmaps;
+ − 927 FT_CharMap* charmaps;
+ − 928
+ − 929 FT_Generic generic;
+ − 930
+ − 931 /*# The following member variables (down to `underline_thickness') */
+ − 932 /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size */
+ − 933 /*# for bitmap fonts. */
+ − 934 FT_BBox bbox;
+ − 935
+ − 936 FT_UShort units_per_EM;
+ − 937 FT_Short ascender;
+ − 938 FT_Short descender;
+ − 939 FT_Short height;
+ − 940
+ − 941 FT_Short max_advance_width;
+ − 942 FT_Short max_advance_height;
+ − 943
+ − 944 FT_Short underline_position;
+ − 945 FT_Short underline_thickness;
+ − 946
+ − 947 FT_GlyphSlot glyph;
+ − 948 FT_Size size;
+ − 949 FT_CharMap charmap;
+ − 950
+ − 951 /*@private begin */
+ − 952
+ − 953 FT_Driver driver;
+ − 954 FT_Memory memory;
+ − 955 FT_Stream stream;
+ − 956
+ − 957 FT_ListRec sizes_list;
+ − 958
+ − 959 FT_Generic autohint;
+ − 960 void* extensions;
+ − 961
+ − 962 FT_Face_Internal internal;
+ − 963
+ − 964 /*@private end */
+ − 965
+ − 966 } FT_FaceRec;
+ − 967
+ − 968
+ − 969 /*************************************************************************/
+ − 970 /* */
+ − 971 /* <Enum> */
+ − 972 /* FT_FACE_FLAG_XXX */
+ − 973 /* */
+ − 974 /* <Description> */
+ − 975 /* A list of bit flags used in the `face_flags' field of the */
+ − 976 /* @FT_FaceRec structure. They inform client applications of */
+ − 977 /* properties of the corresponding face. */
+ − 978 /* */
+ − 979 /* <Values> */
+ − 980 /* FT_FACE_FLAG_SCALABLE :: */
+ − 981 /* Indicates that the face contains outline glyphs. This doesn't */
+ − 982 /* prevent bitmap strikes, i.e., a face can have both this and */
+ − 983 /* and @FT_FACE_FLAG_FIXED_SIZES set. */
+ − 984 /* */
+ − 985 /* FT_FACE_FLAG_FIXED_SIZES :: */
+ − 986 /* Indicates that the face contains bitmap strikes. See also the */
+ − 987 /* `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec. */
+ − 988 /* */
+ − 989 /* FT_FACE_FLAG_FIXED_WIDTH :: */
+ − 990 /* Indicates that the face contains fixed-width characters (like */
+ − 991 /* Courier, Lucido, MonoType, etc.). */
+ − 992 /* */
+ − 993 /* FT_FACE_FLAG_SFNT :: */
+ − 994 /* Indicates that the face uses the `sfnt' storage scheme. For */
+ − 995 /* now, this means TrueType and OpenType. */
+ − 996 /* */
+ − 997 /* FT_FACE_FLAG_HORIZONTAL :: */
+ − 998 /* Indicates that the face contains horizontal glyph metrics. This */
+ − 999 /* should be set for all common formats. */
+ − 1000 /* */
+ − 1001 /* FT_FACE_FLAG_VERTICAL :: */
+ − 1002 /* Indicates that the face contains vertical glyph metrics. This */
+ − 1003 /* is only available in some formats, not all of them. */
+ − 1004 /* */
+ − 1005 /* FT_FACE_FLAG_KERNING :: */
+ − 1006 /* Indicates that the face contains kerning information. If set, */
+ − 1007 /* the kerning distance can be retrieved through the function */
+ − 1008 /* @FT_Get_Kerning. Otherwise the function always return the */
+ − 1009 /* vector (0,0). Note that FreeType doesn't handle kerning data */
+ − 1010 /* from the `GPOS' table (as present in some OpenType fonts). */
+ − 1011 /* */
+ − 1012 /* FT_FACE_FLAG_FAST_GLYPHS :: */
+ − 1013 /* THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT. */
+ − 1014 /* */
+ − 1015 /* FT_FACE_FLAG_MULTIPLE_MASTERS :: */
+ − 1016 /* Indicates that the font contains multiple masters and is capable */
+ − 1017 /* of interpolating between them. See the multiple-masters */
+ − 1018 /* specific API for details. */
+ − 1019 /* */
+ − 1020 /* FT_FACE_FLAG_GLYPH_NAMES :: */
+ − 1021 /* Indicates that the font contains glyph names that can be */
+ − 1022 /* retrieved through @FT_Get_Glyph_Name. Note that some TrueType */
+ − 1023 /* fonts contain broken glyph name tables. Use the function */
+ − 1024 /* @FT_Has_PS_Glyph_Names when needed. */
+ − 1025 /* */
+ − 1026 /* FT_FACE_FLAG_EXTERNAL_STREAM :: */
+ − 1027 /* Used internally by FreeType to indicate that a face's stream was */
+ − 1028 /* provided by the client application and should not be destroyed */
+ − 1029 /* when @FT_Done_Face is called. Don't read or test this flag. */
+ − 1030 /* */
+ − 1031 /* FT_FACE_FLAG_HINTER :: */
+ − 1032 /* Set if the font driver has a hinting machine of its own. For */
+ − 1033 /* example, with TrueType fonts, it makes sense to use data from */
+ − 1034 /* the SFNT `gasp' table only if the native TrueType hinting engine */
+ − 1035 /* (with the bytecode interpreter) is available and active. */
+ − 1036 /* */
+ − 1037 /* FT_FACE_FLAG_CID_KEYED :: */
+ − 1038 /* Set if the font is CID-keyed. In that case, the font is not */
+ − 1039 /* accessed by glyph indices but by CID values. For subsetted */
+ − 1040 /* CID-keyed fonts this has the consequence that not all index */
+ − 1041 /* values are a valid argument to FT_Load_Glyph. Only the CID */
+ − 1042 /* values for which corresponding glyphs in the subsetted font */
+ − 1043 /* exist make FT_Load_Glyph return successfully; in all other cases */
+ − 1044 /* you get an `FT_Err_Invalid_Argument' error. */
+ − 1045 /* */
+ − 1046 /* Note that CID-keyed fonts which are in an SFNT wrapper don't */
+ − 1047 /* have this flag set since the glyphs are accessed in the normal */
+ − 1048 /* way (using contiguous indices); the `CID-ness' isn't visible to */
+ − 1049 /* the application. */
+ − 1050 /* */
+ − 1051 /* FT_FACE_FLAG_TRICKY :: */
+ − 1052 /* Set if the font is `tricky', this is, it always needs the */
+ − 1053 /* font format's native hinting engine to get a reasonable result. */
+ − 1054 /* A typical example is the Chinese font `mingli.ttf' which uses */
+ − 1055 /* TrueType bytecode instructions to move and scale all of its */
+ − 1056 /* subglyphs. */
+ − 1057 /* */
+ − 1058 /* It is not possible to autohint such fonts using */
+ − 1059 /* @FT_LOAD_FORCE_AUTOHINT; it will also ignore */
+ − 1060 /* @FT_LOAD_NO_HINTING. You have to set both @FT_LOAD_NO_HINTING */
+ − 1061 /* and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
+ − 1062 /* probably never want this except for demonstration purposes. */
+ − 1063 /* */
+ − 1064 /* Currently, there are six TrueType fonts in the list of tricky */
+ − 1065 /* fonts; they are hard-coded in file `ttobjs.c'. */
+ − 1066 /* */
+ − 1067 #define FT_FACE_FLAG_SCALABLE ( 1L << 0 )
+ − 1068 #define FT_FACE_FLAG_FIXED_SIZES ( 1L << 1 )
+ − 1069 #define FT_FACE_FLAG_FIXED_WIDTH ( 1L << 2 )
+ − 1070 #define FT_FACE_FLAG_SFNT ( 1L << 3 )
+ − 1071 #define FT_FACE_FLAG_HORIZONTAL ( 1L << 4 )
+ − 1072 #define FT_FACE_FLAG_VERTICAL ( 1L << 5 )
+ − 1073 #define FT_FACE_FLAG_KERNING ( 1L << 6 )
+ − 1074 #define FT_FACE_FLAG_FAST_GLYPHS ( 1L << 7 )
+ − 1075 #define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L << 8 )
+ − 1076 #define FT_FACE_FLAG_GLYPH_NAMES ( 1L << 9 )
+ − 1077 #define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )
+ − 1078 #define FT_FACE_FLAG_HINTER ( 1L << 11 )
+ − 1079 #define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )
+ − 1080 #define FT_FACE_FLAG_TRICKY ( 1L << 13 )
+ − 1081
+ − 1082
+ − 1083 /*************************************************************************
+ − 1084 *
+ − 1085 * @macro:
+ − 1086 * FT_HAS_HORIZONTAL( face )
+ − 1087 *
+ − 1088 * @description:
+ − 1089 * A macro that returns true whenever a face object contains
+ − 1090 * horizontal metrics (this is true for all font formats though).
+ − 1091 *
+ − 1092 * @also:
+ − 1093 * @FT_HAS_VERTICAL can be used to check for vertical metrics.
+ − 1094 *
+ − 1095 */
+ − 1096 #define FT_HAS_HORIZONTAL( face ) \
+ − 1097 ( face->face_flags & FT_FACE_FLAG_HORIZONTAL )
+ − 1098
+ − 1099
+ − 1100 /*************************************************************************
+ − 1101 *
+ − 1102 * @macro:
+ − 1103 * FT_HAS_VERTICAL( face )
+ − 1104 *
+ − 1105 * @description:
+ − 1106 * A macro that returns true whenever a face object contains vertical
+ − 1107 * metrics.
+ − 1108 *
+ − 1109 */
+ − 1110 #define FT_HAS_VERTICAL( face ) \
+ − 1111 ( face->face_flags & FT_FACE_FLAG_VERTICAL )
+ − 1112
+ − 1113
+ − 1114 /*************************************************************************
+ − 1115 *
+ − 1116 * @macro:
+ − 1117 * FT_HAS_KERNING( face )
+ − 1118 *
+ − 1119 * @description:
+ − 1120 * A macro that returns true whenever a face object contains kerning
+ − 1121 * data that can be accessed with @FT_Get_Kerning.
+ − 1122 *
+ − 1123 */
+ − 1124 #define FT_HAS_KERNING( face ) \
+ − 1125 ( face->face_flags & FT_FACE_FLAG_KERNING )
+ − 1126
+ − 1127
+ − 1128 /*************************************************************************
+ − 1129 *
+ − 1130 * @macro:
+ − 1131 * FT_IS_SCALABLE( face )
+ − 1132 *
+ − 1133 * @description:
+ − 1134 * A macro that returns true whenever a face object contains a scalable
+ − 1135 * font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
+ − 1136 * and PFR font formats.
+ − 1137 *
+ − 1138 */
+ − 1139 #define FT_IS_SCALABLE( face ) \
+ − 1140 ( face->face_flags & FT_FACE_FLAG_SCALABLE )
+ − 1141
+ − 1142
+ − 1143 /*************************************************************************
+ − 1144 *
+ − 1145 * @macro:
+ − 1146 * FT_IS_SFNT( face )
+ − 1147 *
+ − 1148 * @description:
+ − 1149 * A macro that returns true whenever a face object contains a font
+ − 1150 * whose format is based on the SFNT storage scheme. This usually
+ − 1151 * means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
+ − 1152 * bitmap fonts.
+ − 1153 *
+ − 1154 * If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
+ − 1155 * @FT_TRUETYPE_TABLES_H are available.
+ − 1156 *
+ − 1157 */
+ − 1158 #define FT_IS_SFNT( face ) \
+ − 1159 ( face->face_flags & FT_FACE_FLAG_SFNT )
+ − 1160
+ − 1161
+ − 1162 /*************************************************************************
+ − 1163 *
+ − 1164 * @macro:
+ − 1165 * FT_IS_FIXED_WIDTH( face )
+ − 1166 *
+ − 1167 * @description:
+ − 1168 * A macro that returns true whenever a face object contains a font face
+ − 1169 * that contains fixed-width (or `monospace', `fixed-pitch', etc.)
+ − 1170 * glyphs.
+ − 1171 *
+ − 1172 */
+ − 1173 #define FT_IS_FIXED_WIDTH( face ) \
+ − 1174 ( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
+ − 1175
+ − 1176
+ − 1177 /*************************************************************************
+ − 1178 *
+ − 1179 * @macro:
+ − 1180 * FT_HAS_FIXED_SIZES( face )
+ − 1181 *
+ − 1182 * @description:
+ − 1183 * A macro that returns true whenever a face object contains some
+ − 1184 * embedded bitmaps. See the `available_sizes' field of the
+ − 1185 * @FT_FaceRec structure.
+ − 1186 *
+ − 1187 */
+ − 1188 #define FT_HAS_FIXED_SIZES( face ) \
+ − 1189 ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
+ − 1190
+ − 1191
+ − 1192 /*************************************************************************
+ − 1193 *
+ − 1194 * @macro:
+ − 1195 * FT_HAS_FAST_GLYPHS( face )
+ − 1196 *
+ − 1197 * @description:
+ − 1198 * Deprecated.
+ − 1199 *
+ − 1200 */
+ − 1201 #define FT_HAS_FAST_GLYPHS( face ) 0
+ − 1202
+ − 1203
+ − 1204 /*************************************************************************
+ − 1205 *
+ − 1206 * @macro:
+ − 1207 * FT_HAS_GLYPH_NAMES( face )
+ − 1208 *
+ − 1209 * @description:
+ − 1210 * A macro that returns true whenever a face object contains some glyph
+ − 1211 * names that can be accessed through @FT_Get_Glyph_Name.
+ − 1212 *
+ − 1213 */
+ − 1214 #define FT_HAS_GLYPH_NAMES( face ) \
+ − 1215 ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
+ − 1216
+ − 1217
+ − 1218 /*************************************************************************
+ − 1219 *
+ − 1220 * @macro:
+ − 1221 * FT_HAS_MULTIPLE_MASTERS( face )
+ − 1222 *
+ − 1223 * @description:
+ − 1224 * A macro that returns true whenever a face object contains some
+ − 1225 * multiple masters. The functions provided by @FT_MULTIPLE_MASTERS_H
+ − 1226 * are then available to choose the exact design you want.
+ − 1227 *
+ − 1228 */
+ − 1229 #define FT_HAS_MULTIPLE_MASTERS( face ) \
+ − 1230 ( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
+ − 1231
+ − 1232
+ − 1233 /*************************************************************************
+ − 1234 *
+ − 1235 * @macro:
+ − 1236 * FT_IS_CID_KEYED( face )
+ − 1237 *
+ − 1238 * @description:
+ − 1239 * A macro that returns true whenever a face object contains a CID-keyed
+ − 1240 * font. See the discussion of @FT_FACE_FLAG_CID_KEYED for more
+ − 1241 * details.
+ − 1242 *
+ − 1243 * If this macro is true, all functions defined in @FT_CID_H are
+ − 1244 * available.
+ − 1245 *
+ − 1246 */
+ − 1247 #define FT_IS_CID_KEYED( face ) \
+ − 1248 ( face->face_flags & FT_FACE_FLAG_CID_KEYED )
+ − 1249
+ − 1250
+ − 1251 /*************************************************************************
+ − 1252 *
+ − 1253 * @macro:
+ − 1254 * FT_IS_TRICKY( face )
+ − 1255 *
+ − 1256 * @description:
+ − 1257 * A macro that returns true whenever a face represents a `tricky' font.
+ − 1258 * See the discussion of @FT_FACE_FLAG_TRICKY for more details.
+ − 1259 *
+ − 1260 */
+ − 1261 #define FT_IS_TRICKY( face ) \
+ − 1262 ( face->face_flags & FT_FACE_FLAG_TRICKY )
+ − 1263
+ − 1264
+ − 1265 /*************************************************************************/
+ − 1266 /* */
+ − 1267 /* <Const> */
+ − 1268 /* FT_STYLE_FLAG_XXX */
+ − 1269 /* */
+ − 1270 /* <Description> */
+ − 1271 /* A list of bit-flags used to indicate the style of a given face. */
+ − 1272 /* These are used in the `style_flags' field of @FT_FaceRec. */
+ − 1273 /* */
+ − 1274 /* <Values> */
+ − 1275 /* FT_STYLE_FLAG_ITALIC :: */
+ − 1276 /* Indicates that a given face style is italic or oblique. */
+ − 1277 /* */
+ − 1278 /* FT_STYLE_FLAG_BOLD :: */
+ − 1279 /* Indicates that a given face is bold. */
+ − 1280 /* */
+ − 1281 /* <Note> */
+ − 1282 /* The style information as provided by FreeType is very basic. More */
+ − 1283 /* details are beyond the scope and should be done on a higher level */
+ − 1284 /* (for example, by analyzing various fields of the `OS/2' table in */
+ − 1285 /* SFNT based fonts). */
+ − 1286 /* */
+ − 1287 #define FT_STYLE_FLAG_ITALIC ( 1 << 0 )
+ − 1288 #define FT_STYLE_FLAG_BOLD ( 1 << 1 )
+ − 1289
+ − 1290
+ − 1291 /*************************************************************************/
+ − 1292 /* */
+ − 1293 /* <Type> */
+ − 1294 /* FT_Size_Internal */
+ − 1295 /* */
+ − 1296 /* <Description> */
+ − 1297 /* An opaque handle to an `FT_Size_InternalRec' structure, used to */
+ − 1298 /* model private data of a given @FT_Size object. */
+ − 1299 /* */
+ − 1300 typedef struct FT_Size_InternalRec_* FT_Size_Internal;
+ − 1301
+ − 1302
+ − 1303 /*************************************************************************/
+ − 1304 /* */
+ − 1305 /* <Struct> */
+ − 1306 /* FT_Size_Metrics */
+ − 1307 /* */
+ − 1308 /* <Description> */
+ − 1309 /* The size metrics structure gives the metrics of a size object. */
+ − 1310 /* */
+ − 1311 /* <Fields> */
+ − 1312 /* x_ppem :: The width of the scaled EM square in pixels, hence */
+ − 1313 /* the term `ppem' (pixels per EM). It is also */
+ − 1314 /* referred to as `nominal width'. */
+ − 1315 /* */
+ − 1316 /* y_ppem :: The height of the scaled EM square in pixels, */
+ − 1317 /* hence the term `ppem' (pixels per EM). It is also */
+ − 1318 /* referred to as `nominal height'. */
+ − 1319 /* */
+ − 1320 /* x_scale :: A 16.16 fractional scaling value used to convert */
+ − 1321 /* horizontal metrics from font units to 26.6 */
+ − 1322 /* fractional pixels. Only relevant for scalable */
+ − 1323 /* font formats. */
+ − 1324 /* */
+ − 1325 /* y_scale :: A 16.16 fractional scaling value used to convert */
+ − 1326 /* vertical metrics from font units to 26.6 */
+ − 1327 /* fractional pixels. Only relevant for scalable */
+ − 1328 /* font formats. */
+ − 1329 /* */
+ − 1330 /* ascender :: The ascender in 26.6 fractional pixels. See */
+ − 1331 /* @FT_FaceRec for the details. */
+ − 1332 /* */
+ − 1333 /* descender :: The descender in 26.6 fractional pixels. See */
+ − 1334 /* @FT_FaceRec for the details. */
+ − 1335 /* */
+ − 1336 /* height :: The height in 26.6 fractional pixels. See */
+ − 1337 /* @FT_FaceRec for the details. */
+ − 1338 /* */
+ − 1339 /* max_advance :: The maximal advance width in 26.6 fractional */
+ − 1340 /* pixels. See @FT_FaceRec for the details. */
+ − 1341 /* */
+ − 1342 /* <Note> */
+ − 1343 /* The scaling values, if relevant, are determined first during a */
+ − 1344 /* size changing operation. The remaining fields are then set by the */
+ − 1345 /* driver. For scalable formats, they are usually set to scaled */
+ − 1346 /* values of the corresponding fields in @FT_FaceRec. */
+ − 1347 /* */
+ − 1348 /* Note that due to glyph hinting, these values might not be exact */
+ − 1349 /* for certain fonts. Thus they must be treated as unreliable */
+ − 1350 /* with an error margin of at least one pixel! */
+ − 1351 /* */
+ − 1352 /* Indeed, the only way to get the exact metrics is to render _all_ */
+ − 1353 /* glyphs. As this would be a definite performance hit, it is up to */
+ − 1354 /* client applications to perform such computations. */
+ − 1355 /* */
+ − 1356 /* The FT_Size_Metrics structure is valid for bitmap fonts also. */
+ − 1357 /* */
+ − 1358 typedef struct FT_Size_Metrics_
+ − 1359 {
+ − 1360 FT_UShort x_ppem; /* horizontal pixels per EM */
+ − 1361 FT_UShort y_ppem; /* vertical pixels per EM */
+ − 1362
+ − 1363 FT_Fixed x_scale; /* scaling values used to convert font */
+ − 1364 FT_Fixed y_scale; /* units to 26.6 fractional pixels */
+ − 1365
+ − 1366 FT_Pos ascender; /* ascender in 26.6 frac. pixels */
+ − 1367 FT_Pos descender; /* descender in 26.6 frac. pixels */
+ − 1368 FT_Pos height; /* text height in 26.6 frac. pixels */
+ − 1369 FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */
+ − 1370
+ − 1371 } FT_Size_Metrics;
+ − 1372
+ − 1373
+ − 1374 /*************************************************************************/
+ − 1375 /* */
+ − 1376 /* <Struct> */
+ − 1377 /* FT_SizeRec */
+ − 1378 /* */
+ − 1379 /* <Description> */
+ − 1380 /* FreeType root size class structure. A size object models a face */
+ − 1381 /* object at a given size. */
+ − 1382 /* */
+ − 1383 /* <Fields> */
+ − 1384 /* face :: Handle to the parent face object. */
+ − 1385 /* */
+ − 1386 /* generic :: A typeless pointer, which is unused by the FreeType */
+ − 1387 /* library or any of its drivers. It can be used by */
+ − 1388 /* client applications to link their own data to each size */
+ − 1389 /* object. */
+ − 1390 /* */
+ − 1391 /* metrics :: Metrics for this size object. This field is read-only. */
+ − 1392 /* */
+ − 1393 typedef struct FT_SizeRec_
+ − 1394 {
+ − 1395 FT_Face face; /* parent face object */
+ − 1396 FT_Generic generic; /* generic pointer for client uses */
+ − 1397 FT_Size_Metrics metrics; /* size metrics */
+ − 1398 FT_Size_Internal internal;
+ − 1399
+ − 1400 } FT_SizeRec;
+ − 1401
+ − 1402
+ − 1403 /*************************************************************************/
+ − 1404 /* */
+ − 1405 /* <Struct> */
+ − 1406 /* FT_SubGlyph */
+ − 1407 /* */
+ − 1408 /* <Description> */
+ − 1409 /* The subglyph structure is an internal object used to describe */
+ − 1410 /* subglyphs (for example, in the case of composites). */
+ − 1411 /* */
+ − 1412 /* <Note> */
+ − 1413 /* The subglyph implementation is not part of the high-level API, */
+ − 1414 /* hence the forward structure declaration. */
+ − 1415 /* */
+ − 1416 /* You can however retrieve subglyph information with */
+ − 1417 /* @FT_Get_SubGlyph_Info. */
+ − 1418 /* */
+ − 1419 typedef struct FT_SubGlyphRec_* FT_SubGlyph;
+ − 1420
+ − 1421
+ − 1422 /*************************************************************************/
+ − 1423 /* */
+ − 1424 /* <Type> */
+ − 1425 /* FT_Slot_Internal */
+ − 1426 /* */
+ − 1427 /* <Description> */
+ − 1428 /* An opaque handle to an `FT_Slot_InternalRec' structure, used to */
+ − 1429 /* model private data of a given @FT_GlyphSlot object. */
+ − 1430 /* */
+ − 1431 typedef struct FT_Slot_InternalRec_* FT_Slot_Internal;
+ − 1432
+ − 1433
+ − 1434 /*************************************************************************/
+ − 1435 /* */
+ − 1436 /* <Struct> */
+ − 1437 /* FT_GlyphSlotRec */
+ − 1438 /* */
+ − 1439 /* <Description> */
+ − 1440 /* FreeType root glyph slot class structure. A glyph slot is a */
+ − 1441 /* container where individual glyphs can be loaded, be they in */
+ − 1442 /* outline or bitmap format. */
+ − 1443 /* */
+ − 1444 /* <Fields> */
+ − 1445 /* library :: A handle to the FreeType library instance */
+ − 1446 /* this slot belongs to. */
+ − 1447 /* */
+ − 1448 /* face :: A handle to the parent face object. */
+ − 1449 /* */
+ − 1450 /* next :: In some cases (like some font tools), several */
+ − 1451 /* glyph slots per face object can be a good */
+ − 1452 /* thing. As this is rare, the glyph slots are */
+ − 1453 /* listed through a direct, single-linked list */
+ − 1454 /* using its `next' field. */
+ − 1455 /* */
+ − 1456 /* generic :: A typeless pointer which is unused by the */
+ − 1457 /* FreeType library or any of its drivers. It */
+ − 1458 /* can be used by client applications to link */
+ − 1459 /* their own data to each glyph slot object. */
+ − 1460 /* */
+ − 1461 /* metrics :: The metrics of the last loaded glyph in the */
+ − 1462 /* slot. The returned values depend on the last */
+ − 1463 /* load flags (see the @FT_Load_Glyph API */
+ − 1464 /* function) and can be expressed either in 26.6 */
+ − 1465 /* fractional pixels or font units. */
+ − 1466 /* */
+ − 1467 /* Note that even when the glyph image is */
+ − 1468 /* transformed, the metrics are not. */
+ − 1469 /* */
+ − 1470 /* linearHoriAdvance :: The advance width of the unhinted glyph. */
+ − 1471 /* Its value is expressed in 16.16 fractional */
+ − 1472 /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
+ − 1473 /* when loading the glyph. This field can be */
+ − 1474 /* important to perform correct WYSIWYG layout. */
+ − 1475 /* Only relevant for outline glyphs. */
+ − 1476 /* */
+ − 1477 /* linearVertAdvance :: The advance height of the unhinted glyph. */
+ − 1478 /* Its value is expressed in 16.16 fractional */
+ − 1479 /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
+ − 1480 /* when loading the glyph. This field can be */
+ − 1481 /* important to perform correct WYSIWYG layout. */
+ − 1482 /* Only relevant for outline glyphs. */
+ − 1483 /* */
+ − 1484 /* advance :: This shorthand is, depending on */
+ − 1485 /* @FT_LOAD_IGNORE_TRANSFORM, the transformed */
+ − 1486 /* advance width for the glyph (in 26.6 */
+ − 1487 /* fractional pixel format). As specified with */
+ − 1488 /* @FT_LOAD_VERTICAL_LAYOUT, it uses either the */
+ − 1489 /* `horiAdvance' or the `vertAdvance' value of */
+ − 1490 /* `metrics' field. */
+ − 1491 /* */
+ − 1492 /* format :: This field indicates the format of the image */
+ − 1493 /* contained in the glyph slot. Typically */
+ − 1494 /* @FT_GLYPH_FORMAT_BITMAP, */
+ − 1495 /* @FT_GLYPH_FORMAT_OUTLINE, or */
+ − 1496 /* @FT_GLYPH_FORMAT_COMPOSITE, but others are */
+ − 1497 /* possible. */
+ − 1498 /* */
+ − 1499 /* bitmap :: This field is used as a bitmap descriptor */
+ − 1500 /* when the slot format is */
+ − 1501 /* @FT_GLYPH_FORMAT_BITMAP. Note that the */
+ − 1502 /* address and content of the bitmap buffer can */
+ − 1503 /* change between calls of @FT_Load_Glyph and a */
+ − 1504 /* few other functions. */
+ − 1505 /* */
+ − 1506 /* bitmap_left :: This is the bitmap's left bearing expressed */
+ − 1507 /* in integer pixels. Of course, this is only */
+ − 1508 /* valid if the format is */
+ − 1509 /* @FT_GLYPH_FORMAT_BITMAP. */
+ − 1510 /* */
+ − 1511 /* bitmap_top :: This is the bitmap's top bearing expressed in */
+ − 1512 /* integer pixels. Remember that this is the */
+ − 1513 /* distance from the baseline to the top-most */
+ − 1514 /* glyph scanline, upwards y~coordinates being */
+ − 1515 /* *positive*. */
+ − 1516 /* */
+ − 1517 /* outline :: The outline descriptor for the current glyph */
+ − 1518 /* image if its format is */
+ − 1519 /* @FT_GLYPH_FORMAT_OUTLINE. Once a glyph is */
+ − 1520 /* loaded, `outline' can be transformed, */
+ − 1521 /* distorted, embolded, etc. However, it must */
+ − 1522 /* not be freed. */
+ − 1523 /* */
+ − 1524 /* num_subglyphs :: The number of subglyphs in a composite glyph. */
+ − 1525 /* This field is only valid for the composite */
+ − 1526 /* glyph format that should normally only be */
+ − 1527 /* loaded with the @FT_LOAD_NO_RECURSE flag. */
+ − 1528 /* For now this is internal to FreeType. */
+ − 1529 /* */
+ − 1530 /* subglyphs :: An array of subglyph descriptors for */
+ − 1531 /* composite glyphs. There are `num_subglyphs' */
+ − 1532 /* elements in there. Currently internal to */
+ − 1533 /* FreeType. */
+ − 1534 /* */
+ − 1535 /* control_data :: Certain font drivers can also return the */
+ − 1536 /* control data for a given glyph image (e.g. */
+ − 1537 /* TrueType bytecode, Type~1 charstrings, etc.). */
+ − 1538 /* This field is a pointer to such data. */
+ − 1539 /* */
+ − 1540 /* control_len :: This is the length in bytes of the control */
+ − 1541 /* data. */
+ − 1542 /* */
+ − 1543 /* other :: Really wicked formats can use this pointer to */
+ − 1544 /* present their own glyph image to client */
+ − 1545 /* applications. Note that the application */
+ − 1546 /* needs to know about the image format. */
+ − 1547 /* */
+ − 1548 /* lsb_delta :: The difference between hinted and unhinted */
+ − 1549 /* left side bearing while autohinting is */
+ − 1550 /* active. Zero otherwise. */
+ − 1551 /* */
+ − 1552 /* rsb_delta :: The difference between hinted and unhinted */
+ − 1553 /* right side bearing while autohinting is */
+ − 1554 /* active. Zero otherwise. */
+ − 1555 /* */
+ − 1556 /* <Note> */
+ − 1557 /* If @FT_Load_Glyph is called with default flags (see */
+ − 1558 /* @FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in */
+ − 1559 /* its native format (e.g., an outline glyph for TrueType and Type~1 */
+ − 1560 /* formats). */
+ − 1561 /* */
+ − 1562 /* This image can later be converted into a bitmap by calling */
+ − 1563 /* @FT_Render_Glyph. This function finds the current renderer for */
+ − 1564 /* the native image's format, then invokes it. */
+ − 1565 /* */
+ − 1566 /* The renderer is in charge of transforming the native image through */
+ − 1567 /* the slot's face transformation fields, then converting it into a */
+ − 1568 /* bitmap that is returned in `slot->bitmap'. */
+ − 1569 /* */
+ − 1570 /* Note that `slot->bitmap_left' and `slot->bitmap_top' are also used */
+ − 1571 /* to specify the position of the bitmap relative to the current pen */
+ − 1572 /* position (e.g., coordinates (0,0) on the baseline). Of course, */
+ − 1573 /* `slot->format' is also changed to @FT_GLYPH_FORMAT_BITMAP. */
+ − 1574 /* */
+ − 1575 /* <Note> */
+ − 1576 /* Here a small pseudo code fragment which shows how to use */
+ − 1577 /* `lsb_delta' and `rsb_delta': */
+ − 1578 /* */
+ − 1579 /* { */
+ − 1580 /* FT_Pos origin_x = 0; */
+ − 1581 /* FT_Pos prev_rsb_delta = 0; */
+ − 1582 /* */
+ − 1583 /* */
+ − 1584 /* for all glyphs do */
+ − 1585 /* <compute kern between current and previous glyph and add it to */
+ − 1586 /* `origin_x'> */
+ − 1587 /* */
+ − 1588 /* <load glyph with `FT_Load_Glyph'> */
+ − 1589 /* */
+ − 1590 /* if ( prev_rsb_delta - face->glyph->lsb_delta >= 32 ) */
+ − 1591 /* origin_x -= 64; */
+ − 1592 /* else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 ) */
+ − 1593 /* origin_x += 64; */
+ − 1594 /* */
+ − 1595 /* prev_rsb_delta = face->glyph->rsb_delta; */
+ − 1596 /* */
+ − 1597 /* <save glyph image, or render glyph, or ...> */
+ − 1598 /* */
+ − 1599 /* origin_x += face->glyph->advance.x; */
+ − 1600 /* endfor */
+ − 1601 /* } */
+ − 1602 /* */
+ − 1603 typedef struct FT_GlyphSlotRec_
+ − 1604 {
+ − 1605 FT_Library library;
+ − 1606 FT_Face face;
+ − 1607 FT_GlyphSlot next;
+ − 1608 FT_UInt reserved; /* retained for binary compatibility */
+ − 1609 FT_Generic generic;
+ − 1610
+ − 1611 FT_Glyph_Metrics metrics;
+ − 1612 FT_Fixed linearHoriAdvance;
+ − 1613 FT_Fixed linearVertAdvance;
+ − 1614 FT_Vector advance;
+ − 1615
+ − 1616 FT_Glyph_Format format;
+ − 1617
+ − 1618 FT_Bitmap bitmap;
+ − 1619 FT_Int bitmap_left;
+ − 1620 FT_Int bitmap_top;
+ − 1621
+ − 1622 FT_Outline outline;
+ − 1623
+ − 1624 FT_UInt num_subglyphs;
+ − 1625 FT_SubGlyph subglyphs;
+ − 1626
+ − 1627 void* control_data;
+ − 1628 long control_len;
+ − 1629
+ − 1630 FT_Pos lsb_delta;
+ − 1631 FT_Pos rsb_delta;
+ − 1632
+ − 1633 void* other;
+ − 1634
+ − 1635 FT_Slot_Internal internal;
+ − 1636
+ − 1637 } FT_GlyphSlotRec;
+ − 1638
+ − 1639
+ − 1640 /*************************************************************************/
+ − 1641 /*************************************************************************/
+ − 1642 /* */
+ − 1643 /* F U N C T I O N S */
+ − 1644 /* */
+ − 1645 /*************************************************************************/
+ − 1646 /*************************************************************************/
+ − 1647
+ − 1648
+ − 1649 /*************************************************************************/
+ − 1650 /* */
+ − 1651 /* <Function> */
+ − 1652 /* FT_Init_FreeType */
+ − 1653 /* */
+ − 1654 /* <Description> */
+ − 1655 /* Initialize a new FreeType library object. The set of modules */
+ − 1656 /* that are registered by this function is determined at build time. */
+ − 1657 /* */
+ − 1658 /* <Output> */
+ − 1659 /* alibrary :: A handle to a new library object. */
+ − 1660 /* */
+ − 1661 /* <Return> */
+ − 1662 /* FreeType error code. 0~means success. */
+ − 1663 /* */
+ − 1664 /* <Note> */
+ − 1665 /* In case you want to provide your own memory allocating routines, */
+ − 1666 /* use @FT_New_Library instead, followed by a call to */
+ − 1667 /* @FT_Add_Default_Modules (or a series of calls to @FT_Add_Module). */
+ − 1668 /* */
+ − 1669 FT_EXPORT( FT_Error )
+ − 1670 FT_Init_FreeType( FT_Library *alibrary );
+ − 1671
+ − 1672
+ − 1673 /*************************************************************************/
+ − 1674 /* */
+ − 1675 /* <Function> */
+ − 1676 /* FT_Done_FreeType */
+ − 1677 /* */
+ − 1678 /* <Description> */
+ − 1679 /* Destroy a given FreeType library object and all of its children, */
+ − 1680 /* including resources, drivers, faces, sizes, etc. */
+ − 1681 /* */
+ − 1682 /* <Input> */
+ − 1683 /* library :: A handle to the target library object. */
+ − 1684 /* */
+ − 1685 /* <Return> */
+ − 1686 /* FreeType error code. 0~means success. */
+ − 1687 /* */
+ − 1688 FT_EXPORT( FT_Error )
+ − 1689 FT_Done_FreeType( FT_Library library );
+ − 1690
+ − 1691
+ − 1692 /*************************************************************************/
+ − 1693 /* */
+ − 1694 /* <Enum> */
+ − 1695 /* FT_OPEN_XXX */
+ − 1696 /* */
+ − 1697 /* <Description> */
+ − 1698 /* A list of bit-field constants used within the `flags' field of the */
+ − 1699 /* @FT_Open_Args structure. */
+ − 1700 /* */
+ − 1701 /* <Values> */
+ − 1702 /* FT_OPEN_MEMORY :: This is a memory-based stream. */
+ − 1703 /* */
+ − 1704 /* FT_OPEN_STREAM :: Copy the stream from the `stream' field. */
+ − 1705 /* */
+ − 1706 /* FT_OPEN_PATHNAME :: Create a new input stream from a C~path */
+ − 1707 /* name. */
+ − 1708 /* */
+ − 1709 /* FT_OPEN_DRIVER :: Use the `driver' field. */
+ − 1710 /* */
+ − 1711 /* FT_OPEN_PARAMS :: Use the `num_params' and `params' fields. */
+ − 1712 /* */
+ − 1713 /* ft_open_memory :: Deprecated; use @FT_OPEN_MEMORY instead. */
+ − 1714 /* */
+ − 1715 /* ft_open_stream :: Deprecated; use @FT_OPEN_STREAM instead. */
+ − 1716 /* */
+ − 1717 /* ft_open_pathname :: Deprecated; use @FT_OPEN_PATHNAME instead. */
+ − 1718 /* */
+ − 1719 /* ft_open_driver :: Deprecated; use @FT_OPEN_DRIVER instead. */
+ − 1720 /* */
+ − 1721 /* ft_open_params :: Deprecated; use @FT_OPEN_PARAMS instead. */
+ − 1722 /* */
+ − 1723 /* <Note> */
+ − 1724 /* The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME' */
+ − 1725 /* flags are mutually exclusive. */
+ − 1726 /* */
+ − 1727 #define FT_OPEN_MEMORY 0x1
+ − 1728 #define FT_OPEN_STREAM 0x2
+ − 1729 #define FT_OPEN_PATHNAME 0x4
+ − 1730 #define FT_OPEN_DRIVER 0x8
+ − 1731 #define FT_OPEN_PARAMS 0x10
+ − 1732
+ − 1733 #define ft_open_memory FT_OPEN_MEMORY /* deprecated */
+ − 1734 #define ft_open_stream FT_OPEN_STREAM /* deprecated */
+ − 1735 #define ft_open_pathname FT_OPEN_PATHNAME /* deprecated */
+ − 1736 #define ft_open_driver FT_OPEN_DRIVER /* deprecated */
+ − 1737 #define ft_open_params FT_OPEN_PARAMS /* deprecated */
+ − 1738
+ − 1739
+ − 1740 /*************************************************************************/
+ − 1741 /* */
+ − 1742 /* <Struct> */
+ − 1743 /* FT_Parameter */
+ − 1744 /* */
+ − 1745 /* <Description> */
+ − 1746 /* A simple structure used to pass more or less generic parameters to */
+ − 1747 /* @FT_Open_Face. */
+ − 1748 /* */
+ − 1749 /* <Fields> */
+ − 1750 /* tag :: A four-byte identification tag. */
+ − 1751 /* */
+ − 1752 /* data :: A pointer to the parameter data. */
+ − 1753 /* */
+ − 1754 /* <Note> */
+ − 1755 /* The ID and function of parameters are driver-specific. See the */
+ − 1756 /* various FT_PARAM_TAG_XXX flags for more information. */
+ − 1757 /* */
+ − 1758 typedef struct FT_Parameter_
+ − 1759 {
+ − 1760 FT_ULong tag;
+ − 1761 FT_Pointer data;
+ − 1762
+ − 1763 } FT_Parameter;
+ − 1764
+ − 1765
+ − 1766 /*************************************************************************/
+ − 1767 /* */
+ − 1768 /* <Struct> */
+ − 1769 /* FT_Open_Args */
+ − 1770 /* */
+ − 1771 /* <Description> */
+ − 1772 /* A structure used to indicate how to open a new font file or */
+ − 1773 /* stream. A pointer to such a structure can be used as a parameter */
+ − 1774 /* for the functions @FT_Open_Face and @FT_Attach_Stream. */
+ − 1775 /* */
+ − 1776 /* <Fields> */
+ − 1777 /* flags :: A set of bit flags indicating how to use the */
+ − 1778 /* structure. */
+ − 1779 /* */
+ − 1780 /* memory_base :: The first byte of the file in memory. */
+ − 1781 /* */
+ − 1782 /* memory_size :: The size in bytes of the file in memory. */
+ − 1783 /* */
+ − 1784 /* pathname :: A pointer to an 8-bit file pathname. */
+ − 1785 /* */
+ − 1786 /* stream :: A handle to a source stream object. */
+ − 1787 /* */
+ − 1788 /* driver :: This field is exclusively used by @FT_Open_Face; */
+ − 1789 /* it simply specifies the font driver to use to open */
+ − 1790 /* the face. If set to~0, FreeType tries to load the */
+ − 1791 /* face with each one of the drivers in its list. */
+ − 1792 /* */
+ − 1793 /* num_params :: The number of extra parameters. */
+ − 1794 /* */
+ − 1795 /* params :: Extra parameters passed to the font driver when */
+ − 1796 /* opening a new face. */
+ − 1797 /* */
+ − 1798 /* <Note> */
+ − 1799 /* The stream type is determined by the contents of `flags' which */
+ − 1800 /* are tested in the following order by @FT_Open_Face: */
+ − 1801 /* */
+ − 1802 /* If the `FT_OPEN_MEMORY' bit is set, assume that this is a */
+ − 1803 /* memory file of `memory_size' bytes, located at `memory_address'. */
+ − 1804 /* The data are are not copied, and the client is responsible for */
+ − 1805 /* releasing and destroying them _after_ the corresponding call to */
+ − 1806 /* @FT_Done_Face. */
+ − 1807 /* */
+ − 1808 /* Otherwise, if the `FT_OPEN_STREAM' bit is set, assume that a */
+ − 1809 /* custom input stream `stream' is used. */
+ − 1810 /* */
+ − 1811 /* Otherwise, if the `FT_OPEN_PATHNAME' bit is set, assume that this */
+ − 1812 /* is a normal file and use `pathname' to open it. */
+ − 1813 /* */
+ − 1814 /* If the `FT_OPEN_DRIVER' bit is set, @FT_Open_Face only tries to */
+ − 1815 /* open the file with the driver whose handler is in `driver'. */
+ − 1816 /* */
+ − 1817 /* If the `FT_OPEN_PARAMS' bit is set, the parameters given by */
+ − 1818 /* `num_params' and `params' is used. They are ignored otherwise. */
+ − 1819 /* */
+ − 1820 /* Ideally, both the `pathname' and `params' fields should be tagged */
+ − 1821 /* as `const'; this is missing for API backwards compatibility. In */
+ − 1822 /* other words, applications should treat them as read-only. */
+ − 1823 /* */
+ − 1824 typedef struct FT_Open_Args_
+ − 1825 {
+ − 1826 FT_UInt flags;
+ − 1827 const FT_Byte* memory_base;
+ − 1828 FT_Long memory_size;
+ − 1829 FT_String* pathname;
+ − 1830 FT_Stream stream;
+ − 1831 FT_Module driver;
+ − 1832 FT_Int num_params;
+ − 1833 FT_Parameter* params;
+ − 1834
+ − 1835 } FT_Open_Args;
+ − 1836
+ − 1837
+ − 1838 /*************************************************************************/
+ − 1839 /* */
+ − 1840 /* <Function> */
+ − 1841 /* FT_New_Face */
+ − 1842 /* */
+ − 1843 /* <Description> */
+ − 1844 /* This function calls @FT_Open_Face to open a font by its pathname. */
+ − 1845 /* */
+ − 1846 /* <InOut> */
+ − 1847 /* library :: A handle to the library resource. */
+ − 1848 /* */
+ − 1849 /* <Input> */
+ − 1850 /* pathname :: A path to the font file. */
+ − 1851 /* */
+ − 1852 /* face_index :: The index of the face within the font. The first */
+ − 1853 /* face has index~0. */
+ − 1854 /* */
+ − 1855 /* <Output> */
+ − 1856 /* aface :: A handle to a new face object. If `face_index' is */
+ − 1857 /* greater than or equal to zero, it must be non-NULL. */
+ − 1858 /* See @FT_Open_Face for more details. */
+ − 1859 /* */
+ − 1860 /* <Return> */
+ − 1861 /* FreeType error code. 0~means success. */
+ − 1862 /* */
+ − 1863 FT_EXPORT( FT_Error )
+ − 1864 FT_New_Face( FT_Library library,
+ − 1865 const char* filepathname,
+ − 1866 FT_Long face_index,
+ − 1867 FT_Face *aface );
+ − 1868
+ − 1869
+ − 1870 /*************************************************************************/
+ − 1871 /* */
+ − 1872 /* <Function> */
+ − 1873 /* FT_New_Memory_Face */
+ − 1874 /* */
+ − 1875 /* <Description> */
+ − 1876 /* This function calls @FT_Open_Face to open a font which has been */
+ − 1877 /* loaded into memory. */
+ − 1878 /* */
+ − 1879 /* <InOut> */
+ − 1880 /* library :: A handle to the library resource. */
+ − 1881 /* */
+ − 1882 /* <Input> */
+ − 1883 /* file_base :: A pointer to the beginning of the font data. */
+ − 1884 /* */
+ − 1885 /* file_size :: The size of the memory chunk used by the font data. */
+ − 1886 /* */
+ − 1887 /* face_index :: The index of the face within the font. The first */
+ − 1888 /* face has index~0. */
+ − 1889 /* */
+ − 1890 /* <Output> */
+ − 1891 /* aface :: A handle to a new face object. If `face_index' is */
+ − 1892 /* greater than or equal to zero, it must be non-NULL. */
+ − 1893 /* See @FT_Open_Face for more details. */
+ − 1894 /* */
+ − 1895 /* <Return> */
+ − 1896 /* FreeType error code. 0~means success. */
+ − 1897 /* */
+ − 1898 /* <Note> */
+ − 1899 /* You must not deallocate the memory before calling @FT_Done_Face. */
+ − 1900 /* */
+ − 1901 FT_EXPORT( FT_Error )
+ − 1902 FT_New_Memory_Face( FT_Library library,
+ − 1903 const FT_Byte* file_base,
+ − 1904 FT_Long file_size,
+ − 1905 FT_Long face_index,
+ − 1906 FT_Face *aface );
+ − 1907
+ − 1908
+ − 1909 /*************************************************************************/
+ − 1910 /* */
+ − 1911 /* <Function> */
+ − 1912 /* FT_Open_Face */
+ − 1913 /* */
+ − 1914 /* <Description> */
+ − 1915 /* Create a face object from a given resource described by */
+ − 1916 /* @FT_Open_Args. */
+ − 1917 /* */
+ − 1918 /* <InOut> */
+ − 1919 /* library :: A handle to the library resource. */
+ − 1920 /* */
+ − 1921 /* <Input> */
+ − 1922 /* args :: A pointer to an `FT_Open_Args' structure which must */
+ − 1923 /* be filled by the caller. */
+ − 1924 /* */
+ − 1925 /* face_index :: The index of the face within the font. The first */
+ − 1926 /* face has index~0. */
+ − 1927 /* */
+ − 1928 /* <Output> */
+ − 1929 /* aface :: A handle to a new face object. If `face_index' is */
+ − 1930 /* greater than or equal to zero, it must be non-NULL. */
+ − 1931 /* See note below. */
+ − 1932 /* */
+ − 1933 /* <Return> */
+ − 1934 /* FreeType error code. 0~means success. */
+ − 1935 /* */
+ − 1936 /* <Note> */
+ − 1937 /* Unlike FreeType 1.x, this function automatically creates a glyph */
+ − 1938 /* slot for the face object which can be accessed directly through */
+ − 1939 /* `face->glyph'. */
+ − 1940 /* */
+ − 1941 /* FT_Open_Face can be used to quickly check whether the font */
+ − 1942 /* format of a given font resource is supported by FreeType. If the */
+ − 1943 /* `face_index' field is negative, the function's return value is~0 */
+ − 1944 /* if the font format is recognized, or non-zero otherwise; */
+ − 1945 /* the function returns a more or less empty face handle in `*aface' */
+ − 1946 /* (if `aface' isn't NULL). The only useful field in this special */
+ − 1947 /* case is `face->num_faces' which gives the number of faces within */
+ − 1948 /* the font file. After examination, the returned @FT_Face structure */
+ − 1949 /* should be deallocated with a call to @FT_Done_Face. */
+ − 1950 /* */
+ − 1951 /* Each new face object created with this function also owns a */
+ − 1952 /* default @FT_Size object, accessible as `face->size'. */
+ − 1953 /* */
+ − 1954 /* See the discussion of reference counters in the description of */
+ − 1955 /* @FT_Reference_Face. */
+ − 1956 /* */
+ − 1957 FT_EXPORT( FT_Error )
+ − 1958 FT_Open_Face( FT_Library library,
+ − 1959 const FT_Open_Args* args,
+ − 1960 FT_Long face_index,
+ − 1961 FT_Face *aface );
+ − 1962
+ − 1963
+ − 1964 /*************************************************************************/
+ − 1965 /* */
+ − 1966 /* <Function> */
+ − 1967 /* FT_Attach_File */
+ − 1968 /* */
+ − 1969 /* <Description> */
+ − 1970 /* This function calls @FT_Attach_Stream to attach a file. */
+ − 1971 /* */
+ − 1972 /* <InOut> */
+ − 1973 /* face :: The target face object. */
+ − 1974 /* */
+ − 1975 /* <Input> */
+ − 1976 /* filepathname :: The pathname. */
+ − 1977 /* */
+ − 1978 /* <Return> */
+ − 1979 /* FreeType error code. 0~means success. */
+ − 1980 /* */
+ − 1981 FT_EXPORT( FT_Error )
+ − 1982 FT_Attach_File( FT_Face face,
+ − 1983 const char* filepathname );
+ − 1984
+ − 1985
+ − 1986 /*************************************************************************/
+ − 1987 /* */
+ − 1988 /* <Function> */
+ − 1989 /* FT_Attach_Stream */
+ − 1990 /* */
+ − 1991 /* <Description> */
+ − 1992 /* `Attach' data to a face object. Normally, this is used to read */
+ − 1993 /* additional information for the face object. For example, you can */
+ − 1994 /* attach an AFM file that comes with a Type~1 font to get the */
+ − 1995 /* kerning values and other metrics. */
+ − 1996 /* */
+ − 1997 /* <InOut> */
+ − 1998 /* face :: The target face object. */
+ − 1999 /* */
+ − 2000 /* <Input> */
+ − 2001 /* parameters :: A pointer to @FT_Open_Args which must be filled by */
+ − 2002 /* the caller. */
+ − 2003 /* */
+ − 2004 /* <Return> */
+ − 2005 /* FreeType error code. 0~means success. */
+ − 2006 /* */
+ − 2007 /* <Note> */
+ − 2008 /* The meaning of the `attach' (i.e., what really happens when the */
+ − 2009 /* new file is read) is not fixed by FreeType itself. It really */
+ − 2010 /* depends on the font format (and thus the font driver). */
+ − 2011 /* */
+ − 2012 /* Client applications are expected to know what they are doing */
+ − 2013 /* when invoking this function. Most drivers simply do not implement */
+ − 2014 /* file attachments. */
+ − 2015 /* */
+ − 2016 FT_EXPORT( FT_Error )
+ − 2017 FT_Attach_Stream( FT_Face face,
+ − 2018 FT_Open_Args* parameters );
+ − 2019
+ − 2020
+ − 2021 /*************************************************************************/
+ − 2022 /* */
+ − 2023 /* <Function> */
+ − 2024 /* FT_Reference_Face */
+ − 2025 /* */
+ − 2026 /* <Description> */
+ − 2027 /* A counter gets initialized to~1 at the time an @FT_Face structure */
+ − 2028 /* is created. This function increments the counter. @FT_Done_Face */
+ − 2029 /* then only destroys a face if the counter is~1, otherwise it simply */
+ − 2030 /* decrements the counter. */
+ − 2031 /* */
+ − 2032 /* This function helps in managing life-cycles of structures which */
+ − 2033 /* reference @FT_Face objects. */
+ − 2034 /* */
+ − 2035 /* <Input> */
+ − 2036 /* face :: A handle to a target face object. */
+ − 2037 /* */
+ − 2038 /* <Return> */
+ − 2039 /* FreeType error code. 0~means success. */
+ − 2040 /* */
+ − 2041 /* <Since> */
+ − 2042 /* 2.4.2 */
+ − 2043 /* */
+ − 2044 FT_EXPORT( FT_Error )
+ − 2045 FT_Reference_Face( FT_Face face );
+ − 2046
+ − 2047
+ − 2048 /*************************************************************************/
+ − 2049 /* */
+ − 2050 /* <Function> */
+ − 2051 /* FT_Done_Face */
+ − 2052 /* */
+ − 2053 /* <Description> */
+ − 2054 /* Discard a given face object, as well as all of its child slots and */
+ − 2055 /* sizes. */
+ − 2056 /* */
+ − 2057 /* <Input> */
+ − 2058 /* face :: A handle to a target face object. */
+ − 2059 /* */
+ − 2060 /* <Return> */
+ − 2061 /* FreeType error code. 0~means success. */
+ − 2062 /* */
+ − 2063 /* <Note> */
+ − 2064 /* See the discussion of reference counters in the description of */
+ − 2065 /* @FT_Reference_Face. */
+ − 2066 /* */
+ − 2067 FT_EXPORT( FT_Error )
+ − 2068 FT_Done_Face( FT_Face face );
+ − 2069
+ − 2070
+ − 2071 /*************************************************************************/
+ − 2072 /* */
+ − 2073 /* <Function> */
+ − 2074 /* FT_Select_Size */
+ − 2075 /* */
+ − 2076 /* <Description> */
+ − 2077 /* Select a bitmap strike. */
+ − 2078 /* */
+ − 2079 /* <InOut> */
+ − 2080 /* face :: A handle to a target face object. */
+ − 2081 /* */
+ − 2082 /* <Input> */
+ − 2083 /* strike_index :: The index of the bitmap strike in the */
+ − 2084 /* `available_sizes' field of @FT_FaceRec structure. */
+ − 2085 /* */
+ − 2086 /* <Return> */
+ − 2087 /* FreeType error code. 0~means success. */
+ − 2088 /* */
+ − 2089 FT_EXPORT( FT_Error )
+ − 2090 FT_Select_Size( FT_Face face,
+ − 2091 FT_Int strike_index );
+ − 2092
+ − 2093
+ − 2094 /*************************************************************************/
+ − 2095 /* */
+ − 2096 /* <Enum> */
+ − 2097 /* FT_Size_Request_Type */
+ − 2098 /* */
+ − 2099 /* <Description> */
+ − 2100 /* An enumeration type that lists the supported size request types. */
+ − 2101 /* */
+ − 2102 /* <Values> */
+ − 2103 /* FT_SIZE_REQUEST_TYPE_NOMINAL :: */
+ − 2104 /* The nominal size. The `units_per_EM' field of @FT_FaceRec is */
+ − 2105 /* used to determine both scaling values. */
+ − 2106 /* */
+ − 2107 /* FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
+ − 2108 /* The real dimension. The sum of the the `Ascender' and (minus */
+ − 2109 /* of) the `Descender' fields of @FT_FaceRec are used to determine */
+ − 2110 /* both scaling values. */
+ − 2111 /* */
+ − 2112 /* FT_SIZE_REQUEST_TYPE_BBOX :: */
+ − 2113 /* The font bounding box. The width and height of the `bbox' field */
+ − 2114 /* of @FT_FaceRec are used to determine the horizontal and vertical */
+ − 2115 /* scaling value, respectively. */
+ − 2116 /* */
+ − 2117 /* FT_SIZE_REQUEST_TYPE_CELL :: */
+ − 2118 /* The `max_advance_width' field of @FT_FaceRec is used to */
+ − 2119 /* determine the horizontal scaling value; the vertical scaling */
+ − 2120 /* value is determined the same way as */
+ − 2121 /* @FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling */
+ − 2122 /* values are set to the smaller one. This type is useful if you */
+ − 2123 /* want to specify the font size for, say, a window of a given */
+ − 2124 /* dimension and 80x24 cells. */
+ − 2125 /* */
+ − 2126 /* FT_SIZE_REQUEST_TYPE_SCALES :: */
+ − 2127 /* Specify the scaling values directly. */
+ − 2128 /* */
+ − 2129 /* <Note> */
+ − 2130 /* The above descriptions only apply to scalable formats. For bitmap */
+ − 2131 /* formats, the behaviour is up to the driver. */
+ − 2132 /* */
+ − 2133 /* See the note section of @FT_Size_Metrics if you wonder how size */
+ − 2134 /* requesting relates to scaling values. */
+ − 2135 /* */
+ − 2136 typedef enum FT_Size_Request_Type_
+ − 2137 {
+ − 2138 FT_SIZE_REQUEST_TYPE_NOMINAL,
+ − 2139 FT_SIZE_REQUEST_TYPE_REAL_DIM,
+ − 2140 FT_SIZE_REQUEST_TYPE_BBOX,
+ − 2141 FT_SIZE_REQUEST_TYPE_CELL,
+ − 2142 FT_SIZE_REQUEST_TYPE_SCALES,
+ − 2143
+ − 2144 FT_SIZE_REQUEST_TYPE_MAX
+ − 2145
+ − 2146 } FT_Size_Request_Type;
+ − 2147
+ − 2148
+ − 2149 /*************************************************************************/
+ − 2150 /* */
+ − 2151 /* <Struct> */
+ − 2152 /* FT_Size_RequestRec */
+ − 2153 /* */
+ − 2154 /* <Description> */
+ − 2155 /* A structure used to model a size request. */
+ − 2156 /* */
+ − 2157 /* <Fields> */
+ − 2158 /* type :: See @FT_Size_Request_Type. */
+ − 2159 /* */
+ − 2160 /* width :: The desired width. */
+ − 2161 /* */
+ − 2162 /* height :: The desired height. */
+ − 2163 /* */
+ − 2164 /* horiResolution :: The horizontal resolution. If set to zero, */
+ − 2165 /* `width' is treated as a 26.6 fractional pixel */
+ − 2166 /* value. */
+ − 2167 /* */
+ − 2168 /* vertResolution :: The vertical resolution. If set to zero, */
+ − 2169 /* `height' is treated as a 26.6 fractional pixel */
+ − 2170 /* value. */
+ − 2171 /* */
+ − 2172 /* <Note> */
+ − 2173 /* If `width' is zero, then the horizontal scaling value is set equal */
+ − 2174 /* to the vertical scaling value, and vice versa. */
+ − 2175 /* */
+ − 2176 typedef struct FT_Size_RequestRec_
+ − 2177 {
+ − 2178 FT_Size_Request_Type type;
+ − 2179 FT_Long width;
+ − 2180 FT_Long height;
+ − 2181 FT_UInt horiResolution;
+ − 2182 FT_UInt vertResolution;
+ − 2183
+ − 2184 } FT_Size_RequestRec;
+ − 2185
+ − 2186
+ − 2187 /*************************************************************************/
+ − 2188 /* */
+ − 2189 /* <Struct> */
+ − 2190 /* FT_Size_Request */
+ − 2191 /* */
+ − 2192 /* <Description> */
+ − 2193 /* A handle to a size request structure. */
+ − 2194 /* */
+ − 2195 typedef struct FT_Size_RequestRec_ *FT_Size_Request;
+ − 2196
+ − 2197
+ − 2198 /*************************************************************************/
+ − 2199 /* */
+ − 2200 /* <Function> */
+ − 2201 /* FT_Request_Size */
+ − 2202 /* */
+ − 2203 /* <Description> */
+ − 2204 /* Resize the scale of the active @FT_Size object in a face. */
+ − 2205 /* */
+ − 2206 /* <InOut> */
+ − 2207 /* face :: A handle to a target face object. */
+ − 2208 /* */
+ − 2209 /* <Input> */
+ − 2210 /* req :: A pointer to a @FT_Size_RequestRec. */
+ − 2211 /* */
+ − 2212 /* <Return> */
+ − 2213 /* FreeType error code. 0~means success. */
+ − 2214 /* */
+ − 2215 /* <Note> */
+ − 2216 /* Although drivers may select the bitmap strike matching the */
+ − 2217 /* request, you should not rely on this if you intend to select a */
+ − 2218 /* particular bitmap strike. Use @FT_Select_Size instead in that */
+ − 2219 /* case. */
+ − 2220 /* */
+ − 2221 FT_EXPORT( FT_Error )
+ − 2222 FT_Request_Size( FT_Face face,
+ − 2223 FT_Size_Request req );
+ − 2224
+ − 2225
+ − 2226 /*************************************************************************/
+ − 2227 /* */
+ − 2228 /* <Function> */
+ − 2229 /* FT_Set_Char_Size */
+ − 2230 /* */
+ − 2231 /* <Description> */
+ − 2232 /* This function calls @FT_Request_Size to request the nominal size */
+ − 2233 /* (in points). */
+ − 2234 /* */
+ − 2235 /* <InOut> */
+ − 2236 /* face :: A handle to a target face object. */
+ − 2237 /* */
+ − 2238 /* <Input> */
+ − 2239 /* char_width :: The nominal width, in 26.6 fractional points. */
+ − 2240 /* */
+ − 2241 /* char_height :: The nominal height, in 26.6 fractional points. */
+ − 2242 /* */
+ − 2243 /* horz_resolution :: The horizontal resolution in dpi. */
+ − 2244 /* */
+ − 2245 /* vert_resolution :: The vertical resolution in dpi. */
+ − 2246 /* */
+ − 2247 /* <Return> */
+ − 2248 /* FreeType error code. 0~means success. */
+ − 2249 /* */
+ − 2250 /* <Note> */
+ − 2251 /* If either the character width or height is zero, it is set equal */
+ − 2252 /* to the other value. */
+ − 2253 /* */
+ − 2254 /* If either the horizontal or vertical resolution is zero, it is set */
+ − 2255 /* equal to the other value. */
+ − 2256 /* */
+ − 2257 /* A character width or height smaller than 1pt is set to 1pt; if */
+ − 2258 /* both resolution values are zero, they are set to 72dpi. */
+ − 2259 /* */
+ − 2260 /* Don't use this function if you are using the FreeType cache API. */
+ − 2261 /* */
+ − 2262 FT_EXPORT( FT_Error )
+ − 2263 FT_Set_Char_Size( FT_Face face,
+ − 2264 FT_F26Dot6 char_width,
+ − 2265 FT_F26Dot6 char_height,
+ − 2266 FT_UInt horz_resolution,
+ − 2267 FT_UInt vert_resolution );
+ − 2268
+ − 2269
+ − 2270 /*************************************************************************/
+ − 2271 /* */
+ − 2272 /* <Function> */
+ − 2273 /* FT_Set_Pixel_Sizes */
+ − 2274 /* */
+ − 2275 /* <Description> */
+ − 2276 /* This function calls @FT_Request_Size to request the nominal size */
+ − 2277 /* (in pixels). */
+ − 2278 /* */
+ − 2279 /* <InOut> */
+ − 2280 /* face :: A handle to the target face object. */
+ − 2281 /* */
+ − 2282 /* <Input> */
+ − 2283 /* pixel_width :: The nominal width, in pixels. */
+ − 2284 /* */
+ − 2285 /* pixel_height :: The nominal height, in pixels. */
+ − 2286 /* */
+ − 2287 /* <Return> */
+ − 2288 /* FreeType error code. 0~means success. */
+ − 2289 /* */
+ − 2290 FT_EXPORT( FT_Error )
+ − 2291 FT_Set_Pixel_Sizes( FT_Face face,
+ − 2292 FT_UInt pixel_width,
+ − 2293 FT_UInt pixel_height );
+ − 2294
+ − 2295
+ − 2296 /*************************************************************************/
+ − 2297 /* */
+ − 2298 /* <Function> */
+ − 2299 /* FT_Load_Glyph */
+ − 2300 /* */
+ − 2301 /* <Description> */
+ − 2302 /* A function used to load a single glyph into the glyph slot of a */
+ − 2303 /* face object. */
+ − 2304 /* */
+ − 2305 /* <InOut> */
+ − 2306 /* face :: A handle to the target face object where the glyph */
+ − 2307 /* is loaded. */
+ − 2308 /* */
+ − 2309 /* <Input> */
+ − 2310 /* glyph_index :: The index of the glyph in the font file. For */
+ − 2311 /* CID-keyed fonts (either in PS or in CFF format) */
+ − 2312 /* this argument specifies the CID value. */
+ − 2313 /* */
+ − 2314 /* load_flags :: A flag indicating what to load for this glyph. The */
+ − 2315 /* @FT_LOAD_XXX constants can be used to control the */
+ − 2316 /* glyph loading process (e.g., whether the outline */
+ − 2317 /* should be scaled, whether to load bitmaps or not, */
+ − 2318 /* whether to hint the outline, etc). */
+ − 2319 /* */
+ − 2320 /* <Return> */
+ − 2321 /* FreeType error code. 0~means success. */
+ − 2322 /* */
+ − 2323 /* <Note> */
+ − 2324 /* The loaded glyph may be transformed. See @FT_Set_Transform for */
+ − 2325 /* the details. */
+ − 2326 /* */
+ − 2327 /* For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is */
+ − 2328 /* returned for invalid CID values (this is, for CID values which */
+ − 2329 /* don't have a corresponding glyph in the font). See the discussion */
+ − 2330 /* of the @FT_FACE_FLAG_CID_KEYED flag for more details. */
+ − 2331 /* */
+ − 2332 FT_EXPORT( FT_Error )
+ − 2333 FT_Load_Glyph( FT_Face face,
+ − 2334 FT_UInt glyph_index,
+ − 2335 FT_Int32 load_flags );
+ − 2336
+ − 2337
+ − 2338 /*************************************************************************/
+ − 2339 /* */
+ − 2340 /* <Function> */
+ − 2341 /* FT_Load_Char */
+ − 2342 /* */
+ − 2343 /* <Description> */
+ − 2344 /* A function used to load a single glyph into the glyph slot of a */
+ − 2345 /* face object, according to its character code. */
+ − 2346 /* */
+ − 2347 /* <InOut> */
+ − 2348 /* face :: A handle to a target face object where the glyph */
+ − 2349 /* is loaded. */
+ − 2350 /* */
+ − 2351 /* <Input> */
+ − 2352 /* char_code :: The glyph's character code, according to the */
+ − 2353 /* current charmap used in the face. */
+ − 2354 /* */
+ − 2355 /* load_flags :: A flag indicating what to load for this glyph. The */
+ − 2356 /* @FT_LOAD_XXX constants can be used to control the */
+ − 2357 /* glyph loading process (e.g., whether the outline */
+ − 2358 /* should be scaled, whether to load bitmaps or not, */
+ − 2359 /* whether to hint the outline, etc). */
+ − 2360 /* */
+ − 2361 /* <Return> */
+ − 2362 /* FreeType error code. 0~means success. */
+ − 2363 /* */
+ − 2364 /* <Note> */
+ − 2365 /* This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph. */
+ − 2366 /* */
+ − 2367 FT_EXPORT( FT_Error )
+ − 2368 FT_Load_Char( FT_Face face,
+ − 2369 FT_ULong char_code,
+ − 2370 FT_Int32 load_flags );
+ − 2371
+ − 2372
+ − 2373 /*************************************************************************
+ − 2374 *
+ − 2375 * @enum:
+ − 2376 * FT_LOAD_XXX
+ − 2377 *
+ − 2378 * @description:
+ − 2379 * A list of bit-field constants used with @FT_Load_Glyph to indicate
+ − 2380 * what kind of operations to perform during glyph loading.
+ − 2381 *
+ − 2382 * @values:
+ − 2383 * FT_LOAD_DEFAULT ::
+ − 2384 * Corresponding to~0, this value is used as the default glyph load
+ − 2385 * operation. In this case, the following happens:
+ − 2386 *
+ − 2387 * 1. FreeType looks for a bitmap for the glyph corresponding to the
+ − 2388 * face's current size. If one is found, the function returns.
+ − 2389 * The bitmap data can be accessed from the glyph slot (see note
+ − 2390 * below).
+ − 2391 *
+ − 2392 * 2. If no embedded bitmap is searched or found, FreeType looks for a
+ − 2393 * scalable outline. If one is found, it is loaded from the font
+ − 2394 * file, scaled to device pixels, then `hinted' to the pixel grid
+ − 2395 * in order to optimize it. The outline data can be accessed from
+ − 2396 * the glyph slot (see note below).
+ − 2397 *
+ − 2398 * Note that by default, the glyph loader doesn't render outlines into
+ − 2399 * bitmaps. The following flags are used to modify this default
+ − 2400 * behaviour to more specific and useful cases.
+ − 2401 *
+ − 2402 * FT_LOAD_NO_SCALE ::
+ − 2403 * Don't scale the outline glyph loaded, but keep it in font units.
+ − 2404 *
+ − 2405 * This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
+ − 2406 * unsets @FT_LOAD_RENDER.
+ − 2407 *
+ − 2408 * FT_LOAD_NO_HINTING ::
+ − 2409 * Disable hinting. This generally generates `blurrier' bitmap glyph
+ − 2410 * when the glyph is rendered in any of the anti-aliased modes. See
+ − 2411 * also the note below.
+ − 2412 *
+ − 2413 * This flag is implied by @FT_LOAD_NO_SCALE.
+ − 2414 *
+ − 2415 * FT_LOAD_RENDER ::
+ − 2416 * Call @FT_Render_Glyph after the glyph is loaded. By default, the
+ − 2417 * glyph is rendered in @FT_RENDER_MODE_NORMAL mode. This can be
+ − 2418 * overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
+ − 2419 *
+ − 2420 * This flag is unset by @FT_LOAD_NO_SCALE.
+ − 2421 *
+ − 2422 * FT_LOAD_NO_BITMAP ::
+ − 2423 * Ignore bitmap strikes when loading. Bitmap-only fonts ignore this
+ − 2424 * flag.
+ − 2425 *
+ − 2426 * @FT_LOAD_NO_SCALE always sets this flag.
+ − 2427 *
+ − 2428 * FT_LOAD_VERTICAL_LAYOUT ::
+ − 2429 * Load the glyph for vertical text layout. _Don't_ use it as it is
+ − 2430 * problematic currently.
+ − 2431 *
+ − 2432 * FT_LOAD_FORCE_AUTOHINT ::
+ − 2433 * Indicates that the auto-hinter is preferred over the font's native
+ − 2434 * hinter. See also the note below.
+ − 2435 *
+ − 2436 * FT_LOAD_CROP_BITMAP ::
+ − 2437 * Indicates that the font driver should crop the loaded bitmap glyph
+ − 2438 * (i.e., remove all space around its black bits). Not all drivers
+ − 2439 * implement this.
+ − 2440 *
+ − 2441 * FT_LOAD_PEDANTIC ::
+ − 2442 * Indicates that the font driver should perform pedantic verifications
+ − 2443 * during glyph loading. This is mostly used to detect broken glyphs
+ − 2444 * in fonts. By default, FreeType tries to handle broken fonts also.
+ − 2445 *
+ − 2446 * FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
+ − 2447 * Ignored. Deprecated.
+ − 2448 *
+ − 2449 * FT_LOAD_NO_RECURSE ::
+ − 2450 * This flag is only used internally. It merely indicates that the
+ − 2451 * font driver should not load composite glyphs recursively. Instead,
+ − 2452 * it should set the `num_subglyph' and `subglyphs' values of the
+ − 2453 * glyph slot accordingly, and set `glyph->format' to
+ − 2454 * @FT_GLYPH_FORMAT_COMPOSITE.
+ − 2455 *
+ − 2456 * The description of sub-glyphs is not available to client
+ − 2457 * applications for now.
+ − 2458 *
+ − 2459 * This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
+ − 2460 *
+ − 2461 * FT_LOAD_IGNORE_TRANSFORM ::
+ − 2462 * Indicates that the transform matrix set by @FT_Set_Transform should
+ − 2463 * be ignored.
+ − 2464 *
+ − 2465 * FT_LOAD_MONOCHROME ::
+ − 2466 * This flag is used with @FT_LOAD_RENDER to indicate that you want to
+ − 2467 * render an outline glyph to a 1-bit monochrome bitmap glyph, with
+ − 2468 * 8~pixels packed into each byte of the bitmap data.
+ − 2469 *
+ − 2470 * Note that this has no effect on the hinting algorithm used. You
+ − 2471 * should rather use @FT_LOAD_TARGET_MONO so that the
+ − 2472 * monochrome-optimized hinting algorithm is used.
+ − 2473 *
+ − 2474 * FT_LOAD_LINEAR_DESIGN ::
+ − 2475 * Indicates that the `linearHoriAdvance' and `linearVertAdvance'
+ − 2476 * fields of @FT_GlyphSlotRec should be kept in font units. See
+ − 2477 * @FT_GlyphSlotRec for details.
+ − 2478 *
+ − 2479 * FT_LOAD_NO_AUTOHINT ::
+ − 2480 * Disable auto-hinter. See also the note below.
+ − 2481 *
+ − 2482 * @note:
+ − 2483 * By default, hinting is enabled and the font's native hinter (see
+ − 2484 * @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter. You can
+ − 2485 * disable hinting by setting @FT_LOAD_NO_HINTING or change the
+ − 2486 * precedence by setting @FT_LOAD_FORCE_AUTOHINT. You can also set
+ − 2487 * @FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be
+ − 2488 * used at all.
+ − 2489 *
+ − 2490 * See the description of @FT_FACE_FLAG_TRICKY for a special exception
+ − 2491 * (affecting only a handful of Asian fonts).
+ − 2492 *
+ − 2493 * Besides deciding which hinter to use, you can also decide which
+ − 2494 * hinting algorithm to use. See @FT_LOAD_TARGET_XXX for details.
+ − 2495 *
+ − 2496 */
+ − 2497 #define FT_LOAD_DEFAULT 0x0
+ − 2498 #define FT_LOAD_NO_SCALE 0x1
+ − 2499 #define FT_LOAD_NO_HINTING 0x2
+ − 2500 #define FT_LOAD_RENDER 0x4
+ − 2501 #define FT_LOAD_NO_BITMAP 0x8
+ − 2502 #define FT_LOAD_VERTICAL_LAYOUT 0x10
+ − 2503 #define FT_LOAD_FORCE_AUTOHINT 0x20
+ − 2504 #define FT_LOAD_CROP_BITMAP 0x40
+ − 2505 #define FT_LOAD_PEDANTIC 0x80
+ − 2506 #define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
+ − 2507 #define FT_LOAD_NO_RECURSE 0x400
+ − 2508 #define FT_LOAD_IGNORE_TRANSFORM 0x800
+ − 2509 #define FT_LOAD_MONOCHROME 0x1000
+ − 2510 #define FT_LOAD_LINEAR_DESIGN 0x2000
+ − 2511 #define FT_LOAD_NO_AUTOHINT 0x8000U
+ − 2512
+ − 2513 /* */
+ − 2514
+ − 2515 /* used internally only by certain font drivers! */
+ − 2516 #define FT_LOAD_ADVANCE_ONLY 0x100
+ − 2517 #define FT_LOAD_SBITS_ONLY 0x4000
+ − 2518
+ − 2519
+ − 2520 /**************************************************************************
+ − 2521 *
+ − 2522 * @enum:
+ − 2523 * FT_LOAD_TARGET_XXX
+ − 2524 *
+ − 2525 * @description:
+ − 2526 * A list of values that are used to select a specific hinting algorithm
+ − 2527 * to use by the hinter. You should OR one of these values to your
+ − 2528 * `load_flags' when calling @FT_Load_Glyph.
+ − 2529 *
+ − 2530 * Note that font's native hinters may ignore the hinting algorithm you
+ − 2531 * have specified (e.g., the TrueType bytecode interpreter). You can set
+ − 2532 * @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.
+ − 2533 *
+ − 2534 * Also note that @FT_LOAD_TARGET_LIGHT is an exception, in that it
+ − 2535 * always implies @FT_LOAD_FORCE_AUTOHINT.
+ − 2536 *
+ − 2537 * @values:
+ − 2538 * FT_LOAD_TARGET_NORMAL ::
+ − 2539 * This corresponds to the default hinting algorithm, optimized for
+ − 2540 * standard gray-level rendering. For monochrome output, use
+ − 2541 * @FT_LOAD_TARGET_MONO instead.
+ − 2542 *
+ − 2543 * FT_LOAD_TARGET_LIGHT ::
+ − 2544 * A lighter hinting algorithm for non-monochrome modes. Many
+ − 2545 * generated glyphs are more fuzzy but better resemble its original
+ − 2546 * shape. A bit like rendering on Mac OS~X.
+ − 2547 *
+ − 2548 * As a special exception, this target implies @FT_LOAD_FORCE_AUTOHINT.
+ − 2549 *
+ − 2550 * FT_LOAD_TARGET_MONO ::
+ − 2551 * Strong hinting algorithm that should only be used for monochrome
+ − 2552 * output. The result is probably unpleasant if the glyph is rendered
+ − 2553 * in non-monochrome modes.
+ − 2554 *
+ − 2555 * FT_LOAD_TARGET_LCD ::
+ − 2556 * A variant of @FT_LOAD_TARGET_NORMAL optimized for horizontally
+ − 2557 * decimated LCD displays.
+ − 2558 *
+ − 2559 * FT_LOAD_TARGET_LCD_V ::
+ − 2560 * A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically
+ − 2561 * decimated LCD displays.
+ − 2562 *
+ − 2563 * @note:
+ − 2564 * You should use only _one_ of the FT_LOAD_TARGET_XXX values in your
+ − 2565 * `load_flags'. They can't be ORed.
+ − 2566 *
+ − 2567 * If @FT_LOAD_RENDER is also set, the glyph is rendered in the
+ − 2568 * corresponding mode (i.e., the mode which matches the used algorithm
+ − 2569 * best) unless @FT_LOAD_MONOCHROME is set.
+ − 2570 *
+ − 2571 * You can use a hinting algorithm that doesn't correspond to the same
+ − 2572 * rendering mode. As an example, it is possible to use the `light'
+ − 2573 * hinting algorithm and have the results rendered in horizontal LCD
+ − 2574 * pixel mode, with code like
+ − 2575 *
+ − 2576 * {
+ − 2577 * FT_Load_Glyph( face, glyph_index,
+ − 2578 * load_flags | FT_LOAD_TARGET_LIGHT );
+ − 2579 *
+ − 2580 * FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
+ − 2581 * }
+ − 2582 *
+ − 2583 */
+ − 2584 #define FT_LOAD_TARGET_( x ) ( (FT_Int32)( (x) & 15 ) << 16 )
+ − 2585
+ − 2586 #define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
+ − 2587 #define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT )
+ − 2588 #define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO )
+ − 2589 #define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD )
+ − 2590 #define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V )
+ − 2591
+ − 2592
+ − 2593 /**************************************************************************
+ − 2594 *
+ − 2595 * @macro:
+ − 2596 * FT_LOAD_TARGET_MODE
+ − 2597 *
+ − 2598 * @description:
+ − 2599 * Return the @FT_Render_Mode corresponding to a given
+ − 2600 * @FT_LOAD_TARGET_XXX value.
+ − 2601 *
+ − 2602 */
+ − 2603 #define FT_LOAD_TARGET_MODE( x ) ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
+ − 2604
+ − 2605
+ − 2606 /*************************************************************************/
+ − 2607 /* */
+ − 2608 /* <Function> */
+ − 2609 /* FT_Set_Transform */
+ − 2610 /* */
+ − 2611 /* <Description> */
+ − 2612 /* A function used to set the transformation that is applied to glyph */
+ − 2613 /* images when they are loaded into a glyph slot through */
+ − 2614 /* @FT_Load_Glyph. */
+ − 2615 /* */
+ − 2616 /* <InOut> */
+ − 2617 /* face :: A handle to the source face object. */
+ − 2618 /* */
+ − 2619 /* <Input> */
+ − 2620 /* matrix :: A pointer to the transformation's 2x2 matrix. Use~0 for */
+ − 2621 /* the identity matrix. */
+ − 2622 /* delta :: A pointer to the translation vector. Use~0 for the null */
+ − 2623 /* vector. */
+ − 2624 /* */
+ − 2625 /* <Note> */
+ − 2626 /* The transformation is only applied to scalable image formats after */
+ − 2627 /* the glyph has been loaded. It means that hinting is unaltered by */
+ − 2628 /* the transformation and is performed on the character size given in */
+ − 2629 /* the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes. */
+ − 2630 /* */
+ − 2631 /* Note that this also transforms the `face.glyph.advance' field, but */
+ − 2632 /* *not* the values in `face.glyph.metrics'. */
+ − 2633 /* */
+ − 2634 FT_EXPORT( void )
+ − 2635 FT_Set_Transform( FT_Face face,
+ − 2636 FT_Matrix* matrix,
+ − 2637 FT_Vector* delta );
+ − 2638
+ − 2639
+ − 2640 /*************************************************************************/
+ − 2641 /* */
+ − 2642 /* <Enum> */
+ − 2643 /* FT_Render_Mode */
+ − 2644 /* */
+ − 2645 /* <Description> */
+ − 2646 /* An enumeration type that lists the render modes supported by */
+ − 2647 /* FreeType~2. Each mode corresponds to a specific type of scanline */
+ − 2648 /* conversion performed on the outline. */
+ − 2649 /* */
+ − 2650 /* For bitmap fonts and embedded bitmaps the `bitmap->pixel_mode' */
+ − 2651 /* field in the @FT_GlyphSlotRec structure gives the format of the */
+ − 2652 /* returned bitmap. */
+ − 2653 /* */
+ − 2654 /* All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity. */
+ − 2655 /* */
+ − 2656 /* <Values> */
+ − 2657 /* FT_RENDER_MODE_NORMAL :: */
+ − 2658 /* This is the default render mode; it corresponds to 8-bit */
+ − 2659 /* anti-aliased bitmaps. */
+ − 2660 /* */
+ − 2661 /* FT_RENDER_MODE_LIGHT :: */
+ − 2662 /* This is equivalent to @FT_RENDER_MODE_NORMAL. It is only */
+ − 2663 /* defined as a separate value because render modes are also used */
+ − 2664 /* indirectly to define hinting algorithm selectors. See */
+ − 2665 /* @FT_LOAD_TARGET_XXX for details. */
+ − 2666 /* */
+ − 2667 /* FT_RENDER_MODE_MONO :: */
+ − 2668 /* This mode corresponds to 1-bit bitmaps (with 2~levels of */
+ − 2669 /* opacity). */
+ − 2670 /* */
+ − 2671 /* FT_RENDER_MODE_LCD :: */
+ − 2672 /* This mode corresponds to horizontal RGB and BGR sub-pixel */
+ − 2673 /* displays like LCD screens. It produces 8-bit bitmaps that are */
+ − 2674 /* 3~times the width of the original glyph outline in pixels, and */
+ − 2675 /* which use the @FT_PIXEL_MODE_LCD mode. */
+ − 2676 /* */
+ − 2677 /* FT_RENDER_MODE_LCD_V :: */
+ − 2678 /* This mode corresponds to vertical RGB and BGR sub-pixel displays */
+ − 2679 /* (like PDA screens, rotated LCD displays, etc.). It produces */
+ − 2680 /* 8-bit bitmaps that are 3~times the height of the original */
+ − 2681 /* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
+ − 2682 /* */
+ − 2683 /* <Note> */
+ − 2684 /* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
+ − 2685 /* filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
+ − 2686 /* (not active in the default builds). It is up to the caller to */
+ − 2687 /* either call @FT_Library_SetLcdFilter (if available) or do the */
+ − 2688 /* filtering itself. */
+ − 2689 /* */
+ − 2690 /* The selected render mode only affects vector glyphs of a font. */
+ − 2691 /* Embedded bitmaps often have a different pixel mode like */
+ − 2692 /* @FT_PIXEL_MODE_MONO. You can use @FT_Bitmap_Convert to transform */
+ − 2693 /* them into 8-bit pixmaps. */
+ − 2694 /* */
+ − 2695 typedef enum FT_Render_Mode_
+ − 2696 {
+ − 2697 FT_RENDER_MODE_NORMAL = 0,
+ − 2698 FT_RENDER_MODE_LIGHT,
+ − 2699 FT_RENDER_MODE_MONO,
+ − 2700 FT_RENDER_MODE_LCD,
+ − 2701 FT_RENDER_MODE_LCD_V,
+ − 2702
+ − 2703 FT_RENDER_MODE_MAX
+ − 2704
+ − 2705 } FT_Render_Mode;
+ − 2706
+ − 2707
+ − 2708 /*************************************************************************/
+ − 2709 /* */
+ − 2710 /* <Enum> */
+ − 2711 /* ft_render_mode_xxx */
+ − 2712 /* */
+ − 2713 /* <Description> */
+ − 2714 /* These constants are deprecated. Use the corresponding */
+ − 2715 /* @FT_Render_Mode values instead. */
+ − 2716 /* */
+ − 2717 /* <Values> */
+ − 2718 /* ft_render_mode_normal :: see @FT_RENDER_MODE_NORMAL */
+ − 2719 /* ft_render_mode_mono :: see @FT_RENDER_MODE_MONO */
+ − 2720 /* */
+ − 2721 #define ft_render_mode_normal FT_RENDER_MODE_NORMAL
+ − 2722 #define ft_render_mode_mono FT_RENDER_MODE_MONO
+ − 2723
+ − 2724
+ − 2725 /*************************************************************************/
+ − 2726 /* */
+ − 2727 /* <Function> */
+ − 2728 /* FT_Render_Glyph */
+ − 2729 /* */
+ − 2730 /* <Description> */
+ − 2731 /* Convert a given glyph image to a bitmap. It does so by inspecting */
+ − 2732 /* the glyph image format, finding the relevant renderer, and */
+ − 2733 /* invoking it. */
+ − 2734 /* */
+ − 2735 /* <InOut> */
+ − 2736 /* slot :: A handle to the glyph slot containing the image to */
+ − 2737 /* convert. */
+ − 2738 /* */
+ − 2739 /* <Input> */
+ − 2740 /* render_mode :: This is the render mode used to render the glyph */
+ − 2741 /* image into a bitmap. See @FT_Render_Mode for a */
+ − 2742 /* list of possible values. */
+ − 2743 /* */
+ − 2744 /* <Return> */
+ − 2745 /* FreeType error code. 0~means success. */
+ − 2746 /* */
+ − 2747 FT_EXPORT( FT_Error )
+ − 2748 FT_Render_Glyph( FT_GlyphSlot slot,
+ − 2749 FT_Render_Mode render_mode );
+ − 2750
+ − 2751
+ − 2752 /*************************************************************************/
+ − 2753 /* */
+ − 2754 /* <Enum> */
+ − 2755 /* FT_Kerning_Mode */
+ − 2756 /* */
+ − 2757 /* <Description> */
+ − 2758 /* An enumeration used to specify which kerning values to return in */
+ − 2759 /* @FT_Get_Kerning. */
+ − 2760 /* */
+ − 2761 /* <Values> */
+ − 2762 /* FT_KERNING_DEFAULT :: Return scaled and grid-fitted kerning */
+ − 2763 /* distances (value is~0). */
+ − 2764 /* */
+ − 2765 /* FT_KERNING_UNFITTED :: Return scaled but un-grid-fitted kerning */
+ − 2766 /* distances. */
+ − 2767 /* */
+ − 2768 /* FT_KERNING_UNSCALED :: Return the kerning vector in original font */
+ − 2769 /* units. */
+ − 2770 /* */
+ − 2771 typedef enum FT_Kerning_Mode_
+ − 2772 {
+ − 2773 FT_KERNING_DEFAULT = 0,
+ − 2774 FT_KERNING_UNFITTED,
+ − 2775 FT_KERNING_UNSCALED
+ − 2776
+ − 2777 } FT_Kerning_Mode;
+ − 2778
+ − 2779
+ − 2780 /*************************************************************************/
+ − 2781 /* */
+ − 2782 /* <Const> */
+ − 2783 /* ft_kerning_default */
+ − 2784 /* */
+ − 2785 /* <Description> */
+ − 2786 /* This constant is deprecated. Please use @FT_KERNING_DEFAULT */
+ − 2787 /* instead. */
+ − 2788 /* */
+ − 2789 #define ft_kerning_default FT_KERNING_DEFAULT
+ − 2790
+ − 2791
+ − 2792 /*************************************************************************/
+ − 2793 /* */
+ − 2794 /* <Const> */
+ − 2795 /* ft_kerning_unfitted */
+ − 2796 /* */
+ − 2797 /* <Description> */
+ − 2798 /* This constant is deprecated. Please use @FT_KERNING_UNFITTED */
+ − 2799 /* instead. */
+ − 2800 /* */
+ − 2801 #define ft_kerning_unfitted FT_KERNING_UNFITTED
+ − 2802
+ − 2803
+ − 2804 /*************************************************************************/
+ − 2805 /* */
+ − 2806 /* <Const> */
+ − 2807 /* ft_kerning_unscaled */
+ − 2808 /* */
+ − 2809 /* <Description> */
+ − 2810 /* This constant is deprecated. Please use @FT_KERNING_UNSCALED */
+ − 2811 /* instead. */
+ − 2812 /* */
+ − 2813 #define ft_kerning_unscaled FT_KERNING_UNSCALED
+ − 2814
+ − 2815
+ − 2816 /*************************************************************************/
+ − 2817 /* */
+ − 2818 /* <Function> */
+ − 2819 /* FT_Get_Kerning */
+ − 2820 /* */
+ − 2821 /* <Description> */
+ − 2822 /* Return the kerning vector between two glyphs of a same face. */
+ − 2823 /* */
+ − 2824 /* <Input> */
+ − 2825 /* face :: A handle to a source face object. */
+ − 2826 /* */
+ − 2827 /* left_glyph :: The index of the left glyph in the kern pair. */
+ − 2828 /* */
+ − 2829 /* right_glyph :: The index of the right glyph in the kern pair. */
+ − 2830 /* */
+ − 2831 /* kern_mode :: See @FT_Kerning_Mode for more information. */
+ − 2832 /* Determines the scale and dimension of the returned */
+ − 2833 /* kerning vector. */
+ − 2834 /* */
+ − 2835 /* <Output> */
+ − 2836 /* akerning :: The kerning vector. This is either in font units */
+ − 2837 /* or in pixels (26.6 format) for scalable formats, */
+ − 2838 /* and in pixels for fixed-sizes formats. */
+ − 2839 /* */
+ − 2840 /* <Return> */
+ − 2841 /* FreeType error code. 0~means success. */
+ − 2842 /* */
+ − 2843 /* <Note> */
+ − 2844 /* Only horizontal layouts (left-to-right & right-to-left) are */
+ − 2845 /* supported by this method. Other layouts, or more sophisticated */
+ − 2846 /* kernings, are out of the scope of this API function -- they can be */
+ − 2847 /* implemented through format-specific interfaces. */
+ − 2848 /* */
+ − 2849 FT_EXPORT( FT_Error )
+ − 2850 FT_Get_Kerning( FT_Face face,
+ − 2851 FT_UInt left_glyph,
+ − 2852 FT_UInt right_glyph,
+ − 2853 FT_UInt kern_mode,
+ − 2854 FT_Vector *akerning );
+ − 2855
+ − 2856
+ − 2857 /*************************************************************************/
+ − 2858 /* */
+ − 2859 /* <Function> */
+ − 2860 /* FT_Get_Track_Kerning */
+ − 2861 /* */
+ − 2862 /* <Description> */
+ − 2863 /* Return the track kerning for a given face object at a given size. */
+ − 2864 /* */
+ − 2865 /* <Input> */
+ − 2866 /* face :: A handle to a source face object. */
+ − 2867 /* */
+ − 2868 /* point_size :: The point size in 16.16 fractional points. */
+ − 2869 /* */
+ − 2870 /* degree :: The degree of tightness. */
+ − 2871 /* */
+ − 2872 /* <Output> */
+ − 2873 /* akerning :: The kerning in 16.16 fractional points. */
+ − 2874 /* */
+ − 2875 /* <Return> */
+ − 2876 /* FreeType error code. 0~means success. */
+ − 2877 /* */
+ − 2878 FT_EXPORT( FT_Error )
+ − 2879 FT_Get_Track_Kerning( FT_Face face,
+ − 2880 FT_Fixed point_size,
+ − 2881 FT_Int degree,
+ − 2882 FT_Fixed* akerning );
+ − 2883
+ − 2884
+ − 2885 /*************************************************************************/
+ − 2886 /* */
+ − 2887 /* <Function> */
+ − 2888 /* FT_Get_Glyph_Name */
+ − 2889 /* */
+ − 2890 /* <Description> */
+ − 2891 /* Retrieve the ASCII name of a given glyph in a face. This only */
+ − 2892 /* works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1. */
+ − 2893 /* */
+ − 2894 /* <Input> */
+ − 2895 /* face :: A handle to a source face object. */
+ − 2896 /* */
+ − 2897 /* glyph_index :: The glyph index. */
+ − 2898 /* */
+ − 2899 /* buffer_max :: The maximal number of bytes available in the */
+ − 2900 /* buffer. */
+ − 2901 /* */
+ − 2902 /* <Output> */
+ − 2903 /* buffer :: A pointer to a target buffer where the name is */
+ − 2904 /* copied to. */
+ − 2905 /* */
+ − 2906 /* <Return> */
+ − 2907 /* FreeType error code. 0~means success. */
+ − 2908 /* */
+ − 2909 /* <Note> */
+ − 2910 /* An error is returned if the face doesn't provide glyph names or if */
+ − 2911 /* the glyph index is invalid. In all cases of failure, the first */
+ − 2912 /* byte of `buffer' is set to~0 to indicate an empty name. */
+ − 2913 /* */
+ − 2914 /* The glyph name is truncated to fit within the buffer if it is too */
+ − 2915 /* long. The returned string is always zero-terminated. */
+ − 2916 /* */
+ − 2917 /* This function is not compiled within the library if the config */
+ − 2918 /* macro `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is defined in */
+ − 2919 /* `include/freetype/config/ftoptions.h'. */
+ − 2920 /* */
+ − 2921 FT_EXPORT( FT_Error )
+ − 2922 FT_Get_Glyph_Name( FT_Face face,
+ − 2923 FT_UInt glyph_index,
+ − 2924 FT_Pointer buffer,
+ − 2925 FT_UInt buffer_max );
+ − 2926
+ − 2927
+ − 2928 /*************************************************************************/
+ − 2929 /* */
+ − 2930 /* <Function> */
+ − 2931 /* FT_Get_Postscript_Name */
+ − 2932 /* */
+ − 2933 /* <Description> */
+ − 2934 /* Retrieve the ASCII PostScript name of a given face, if available. */
+ − 2935 /* This only works with PostScript and TrueType fonts. */
+ − 2936 /* */
+ − 2937 /* <Input> */
+ − 2938 /* face :: A handle to the source face object. */
+ − 2939 /* */
+ − 2940 /* <Return> */
+ − 2941 /* A pointer to the face's PostScript name. NULL if unavailable. */
+ − 2942 /* */
+ − 2943 /* <Note> */
+ − 2944 /* The returned pointer is owned by the face and is destroyed with */
+ − 2945 /* it. */
+ − 2946 /* */
+ − 2947 FT_EXPORT( const char* )
+ − 2948 FT_Get_Postscript_Name( FT_Face face );
+ − 2949
+ − 2950
+ − 2951 /*************************************************************************/
+ − 2952 /* */
+ − 2953 /* <Function> */
+ − 2954 /* FT_Select_Charmap */
+ − 2955 /* */
+ − 2956 /* <Description> */
+ − 2957 /* Select a given charmap by its encoding tag (as listed in */
+ − 2958 /* `freetype.h'). */
+ − 2959 /* */
+ − 2960 /* <InOut> */
+ − 2961 /* face :: A handle to the source face object. */
+ − 2962 /* */
+ − 2963 /* <Input> */
+ − 2964 /* encoding :: A handle to the selected encoding. */
+ − 2965 /* */
+ − 2966 /* <Return> */
+ − 2967 /* FreeType error code. 0~means success. */
+ − 2968 /* */
+ − 2969 /* <Note> */
+ − 2970 /* This function returns an error if no charmap in the face */
+ − 2971 /* corresponds to the encoding queried here. */
+ − 2972 /* */
+ − 2973 /* Because many fonts contain more than a single cmap for Unicode */
+ − 2974 /* encoding, this function has some special code to select the one */
+ − 2975 /* which covers Unicode best (`best' in the sense that a UCS-4 cmap */
+ − 2976 /* is preferred to a UCS-2 cmap). It is thus preferable to */
+ − 2977 /* @FT_Set_Charmap in this case. */
+ − 2978 /* */
+ − 2979 FT_EXPORT( FT_Error )
+ − 2980 FT_Select_Charmap( FT_Face face,
+ − 2981 FT_Encoding encoding );
+ − 2982
+ − 2983
+ − 2984 /*************************************************************************/
+ − 2985 /* */
+ − 2986 /* <Function> */
+ − 2987 /* FT_Set_Charmap */
+ − 2988 /* */
+ − 2989 /* <Description> */
+ − 2990 /* Select a given charmap for character code to glyph index mapping. */
+ − 2991 /* */
+ − 2992 /* <InOut> */
+ − 2993 /* face :: A handle to the source face object. */
+ − 2994 /* */
+ − 2995 /* <Input> */
+ − 2996 /* charmap :: A handle to the selected charmap. */
+ − 2997 /* */
+ − 2998 /* <Return> */
+ − 2999 /* FreeType error code. 0~means success. */
+ − 3000 /* */
+ − 3001 /* <Note> */
+ − 3002 /* This function returns an error if the charmap is not part of */
+ − 3003 /* the face (i.e., if it is not listed in the `face->charmaps' */
+ − 3004 /* table). */
+ − 3005 /* */
+ − 3006 /* It also fails if a type~14 charmap is selected. */
+ − 3007 /* */
+ − 3008 FT_EXPORT( FT_Error )
+ − 3009 FT_Set_Charmap( FT_Face face,
+ − 3010 FT_CharMap charmap );
+ − 3011
+ − 3012
+ − 3013 /*************************************************************************
+ − 3014 *
+ − 3015 * @function:
+ − 3016 * FT_Get_Charmap_Index
+ − 3017 *
+ − 3018 * @description:
+ − 3019 * Retrieve index of a given charmap.
+ − 3020 *
+ − 3021 * @input:
+ − 3022 * charmap ::
+ − 3023 * A handle to a charmap.
+ − 3024 *
+ − 3025 * @return:
+ − 3026 * The index into the array of character maps within the face to which
+ − 3027 * `charmap' belongs. If an error occurs, -1 is returned.
+ − 3028 *
+ − 3029 */
+ − 3030 FT_EXPORT( FT_Int )
+ − 3031 FT_Get_Charmap_Index( FT_CharMap charmap );
+ − 3032
+ − 3033
+ − 3034 /*************************************************************************/
+ − 3035 /* */
+ − 3036 /* <Function> */
+ − 3037 /* FT_Get_Char_Index */
+ − 3038 /* */
+ − 3039 /* <Description> */
+ − 3040 /* Return the glyph index of a given character code. This function */
+ − 3041 /* uses a charmap object to do the mapping. */
+ − 3042 /* */
+ − 3043 /* <Input> */
+ − 3044 /* face :: A handle to the source face object. */
+ − 3045 /* */
+ − 3046 /* charcode :: The character code. */
+ − 3047 /* */
+ − 3048 /* <Return> */
+ − 3049 /* The glyph index. 0~means `undefined character code'. */
+ − 3050 /* */
+ − 3051 /* <Note> */
+ − 3052 /* If you use FreeType to manipulate the contents of font files */
+ − 3053 /* directly, be aware that the glyph index returned by this function */
+ − 3054 /* doesn't always correspond to the internal indices used within */
+ − 3055 /* the file. This is done to ensure that value~0 always corresponds */
+ − 3056 /* to the `missing glyph'. */
+ − 3057 /* */
+ − 3058 FT_EXPORT( FT_UInt )
+ − 3059 FT_Get_Char_Index( FT_Face face,
+ − 3060 FT_ULong charcode );
+ − 3061
+ − 3062
+ − 3063 /*************************************************************************/
+ − 3064 /* */
+ − 3065 /* <Function> */
+ − 3066 /* FT_Get_First_Char */
+ − 3067 /* */
+ − 3068 /* <Description> */
+ − 3069 /* This function is used to return the first character code in the */
+ − 3070 /* current charmap of a given face. It also returns the */
+ − 3071 /* corresponding glyph index. */
+ − 3072 /* */
+ − 3073 /* <Input> */
+ − 3074 /* face :: A handle to the source face object. */
+ − 3075 /* */
+ − 3076 /* <Output> */
+ − 3077 /* agindex :: Glyph index of first character code. 0~if charmap is */
+ − 3078 /* empty. */
+ − 3079 /* */
+ − 3080 /* <Return> */
+ − 3081 /* The charmap's first character code. */
+ − 3082 /* */
+ − 3083 /* <Note> */
+ − 3084 /* You should use this function with @FT_Get_Next_Char to be able to */
+ − 3085 /* parse all character codes available in a given charmap. The code */
+ − 3086 /* should look like this: */
+ − 3087 /* */
+ − 3088 /* { */
+ − 3089 /* FT_ULong charcode; */
+ − 3090 /* FT_UInt gindex; */
+ − 3091 /* */
+ − 3092 /* */
+ − 3093 /* charcode = FT_Get_First_Char( face, &gindex ); */
+ − 3094 /* while ( gindex != 0 ) */
+ − 3095 /* { */
+ − 3096 /* ... do something with (charcode,gindex) pair ... */
+ − 3097 /* */
+ − 3098 /* charcode = FT_Get_Next_Char( face, charcode, &gindex ); */
+ − 3099 /* } */
+ − 3100 /* } */
+ − 3101 /* */
+ − 3102 /* Note that `*agindex' is set to~0 if the charmap is empty. The */
+ − 3103 /* result itself can be~0 in two cases: if the charmap is empty or */
+ − 3104 /* if the value~0 is the first valid character code. */
+ − 3105 /* */
+ − 3106 FT_EXPORT( FT_ULong )
+ − 3107 FT_Get_First_Char( FT_Face face,
+ − 3108 FT_UInt *agindex );
+ − 3109
+ − 3110
+ − 3111 /*************************************************************************/
+ − 3112 /* */
+ − 3113 /* <Function> */
+ − 3114 /* FT_Get_Next_Char */
+ − 3115 /* */
+ − 3116 /* <Description> */
+ − 3117 /* This function is used to return the next character code in the */
+ − 3118 /* current charmap of a given face following the value `char_code', */
+ − 3119 /* as well as the corresponding glyph index. */
+ − 3120 /* */
+ − 3121 /* <Input> */
+ − 3122 /* face :: A handle to the source face object. */
+ − 3123 /* char_code :: The starting character code. */
+ − 3124 /* */
+ − 3125 /* <Output> */
+ − 3126 /* agindex :: Glyph index of next character code. 0~if charmap */
+ − 3127 /* is empty. */
+ − 3128 /* */
+ − 3129 /* <Return> */
+ − 3130 /* The charmap's next character code. */
+ − 3131 /* */
+ − 3132 /* <Note> */
+ − 3133 /* You should use this function with @FT_Get_First_Char to walk */
+ − 3134 /* over all character codes available in a given charmap. See the */
+ − 3135 /* note for this function for a simple code example. */
+ − 3136 /* */
+ − 3137 /* Note that `*agindex' is set to~0 when there are no more codes in */
+ − 3138 /* the charmap. */
+ − 3139 /* */
+ − 3140 FT_EXPORT( FT_ULong )
+ − 3141 FT_Get_Next_Char( FT_Face face,
+ − 3142 FT_ULong char_code,
+ − 3143 FT_UInt *agindex );
+ − 3144
+ − 3145
+ − 3146 /*************************************************************************/
+ − 3147 /* */
+ − 3148 /* <Function> */
+ − 3149 /* FT_Get_Name_Index */
+ − 3150 /* */
+ − 3151 /* <Description> */
+ − 3152 /* Return the glyph index of a given glyph name. This function uses */
+ − 3153 /* driver specific objects to do the translation. */
+ − 3154 /* */
+ − 3155 /* <Input> */
+ − 3156 /* face :: A handle to the source face object. */
+ − 3157 /* */
+ − 3158 /* glyph_name :: The glyph name. */
+ − 3159 /* */
+ − 3160 /* <Return> */
+ − 3161 /* The glyph index. 0~means `undefined character code'. */
+ − 3162 /* */
+ − 3163 FT_EXPORT( FT_UInt )
+ − 3164 FT_Get_Name_Index( FT_Face face,
+ − 3165 FT_String* glyph_name );
+ − 3166
+ − 3167
+ − 3168 /*************************************************************************
+ − 3169 *
+ − 3170 * @macro:
+ − 3171 * FT_SUBGLYPH_FLAG_XXX
+ − 3172 *
+ − 3173 * @description:
+ − 3174 * A list of constants used to describe subglyphs. Please refer to the
+ − 3175 * TrueType specification for the meaning of the various flags.
+ − 3176 *
+ − 3177 * @values:
+ − 3178 * FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
+ − 3179 * FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
+ − 3180 * FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
+ − 3181 * FT_SUBGLYPH_FLAG_SCALE ::
+ − 3182 * FT_SUBGLYPH_FLAG_XY_SCALE ::
+ − 3183 * FT_SUBGLYPH_FLAG_2X2 ::
+ − 3184 * FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
+ − 3185 *
+ − 3186 */
+ − 3187 #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1
+ − 3188 #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
+ − 3189 #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
+ − 3190 #define FT_SUBGLYPH_FLAG_SCALE 8
+ − 3191 #define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
+ − 3192 #define FT_SUBGLYPH_FLAG_2X2 0x80
+ − 3193 #define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
+ − 3194
+ − 3195
+ − 3196 /*************************************************************************
+ − 3197 *
+ − 3198 * @func:
+ − 3199 * FT_Get_SubGlyph_Info
+ − 3200 *
+ − 3201 * @description:
+ − 3202 * Retrieve a description of a given subglyph. Only use it if
+ − 3203 * `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE; an error is
+ − 3204 * returned otherwise.
+ − 3205 *
+ − 3206 * @input:
+ − 3207 * glyph ::
+ − 3208 * The source glyph slot.
+ − 3209 *
+ − 3210 * sub_index ::
+ − 3211 * The index of the subglyph. Must be less than
+ − 3212 * `glyph->num_subglyphs'.
+ − 3213 *
+ − 3214 * @output:
+ − 3215 * p_index ::
+ − 3216 * The glyph index of the subglyph.
+ − 3217 *
+ − 3218 * p_flags ::
+ − 3219 * The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
+ − 3220 *
+ − 3221 * p_arg1 ::
+ − 3222 * The subglyph's first argument (if any).
+ − 3223 *
+ − 3224 * p_arg2 ::
+ − 3225 * The subglyph's second argument (if any).
+ − 3226 *
+ − 3227 * p_transform ::
+ − 3228 * The subglyph transformation (if any).
+ − 3229 *
+ − 3230 * @return:
+ − 3231 * FreeType error code. 0~means success.
+ − 3232 *
+ − 3233 * @note:
+ − 3234 * The values of `*p_arg1', `*p_arg2', and `*p_transform' must be
+ − 3235 * interpreted depending on the flags returned in `*p_flags'. See the
+ − 3236 * TrueType specification for details.
+ − 3237 *
+ − 3238 */
+ − 3239 FT_EXPORT( FT_Error )
+ − 3240 FT_Get_SubGlyph_Info( FT_GlyphSlot glyph,
+ − 3241 FT_UInt sub_index,
+ − 3242 FT_Int *p_index,
+ − 3243 FT_UInt *p_flags,
+ − 3244 FT_Int *p_arg1,
+ − 3245 FT_Int *p_arg2,
+ − 3246 FT_Matrix *p_transform );
+ − 3247
+ − 3248
+ − 3249 /*************************************************************************/
+ − 3250 /* */
+ − 3251 /* <Enum> */
+ − 3252 /* FT_FSTYPE_XXX */
+ − 3253 /* */
+ − 3254 /* <Description> */
+ − 3255 /* A list of bit flags used in the `fsType' field of the OS/2 table */
+ − 3256 /* in a TrueType or OpenType font and the `FSType' entry in a */
+ − 3257 /* PostScript font. These bit flags are returned by */
+ − 3258 /* @FT_Get_FSType_Flags; they inform client applications of embedding */
+ − 3259 /* and subsetting restrictions associated with a font. */
+ − 3260 /* */
+ − 3261 /* See http://www.adobe.com/devnet/acrobat/pdfs/FontPolicies.pdf for */
+ − 3262 /* more details. */
+ − 3263 /* */
+ − 3264 /* <Values> */
+ − 3265 /* FT_FSTYPE_INSTALLABLE_EMBEDDING :: */
+ − 3266 /* Fonts with no fsType bit set may be embedded and permanently */
+ − 3267 /* installed on the remote system by an application. */
+ − 3268 /* */
+ − 3269 /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING :: */
+ − 3270 /* Fonts that have only this bit set must not be modified, embedded */
+ − 3271 /* or exchanged in any manner without first obtaining permission of */
+ − 3272 /* the font software copyright owner. */
+ − 3273 /* */
+ − 3274 /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING :: */
+ − 3275 /* If this bit is set, the font may be embedded and temporarily */
+ − 3276 /* loaded on the remote system. Documents containing Preview & */
+ − 3277 /* Print fonts must be opened `read-only'; no edits can be applied */
+ − 3278 /* to the document. */
+ − 3279 /* */
+ − 3280 /* FT_FSTYPE_EDITABLE_EMBEDDING :: */
+ − 3281 /* If this bit is set, the font may be embedded but must only be */
+ − 3282 /* installed temporarily on other systems. In contrast to Preview */
+ − 3283 /* & Print fonts, documents containing editable fonts may be opened */
+ − 3284 /* for reading, editing is permitted, and changes may be saved. */
+ − 3285 /* */
+ − 3286 /* FT_FSTYPE_NO_SUBSETTING :: */
+ − 3287 /* If this bit is set, the font may not be subsetted prior to */
+ − 3288 /* embedding. */
+ − 3289 /* */
+ − 3290 /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY :: */
+ − 3291 /* If this bit is set, only bitmaps contained in the font may be */
+ − 3292 /* embedded; no outline data may be embedded. If there are no */
+ − 3293 /* bitmaps available in the font, then the font is unembeddable. */
+ − 3294 /* */
+ − 3295 /* <Note> */
+ − 3296 /* While the fsType flags can indicate that a font may be embedded, a */
+ − 3297 /* license with the font vendor may be separately required to use the */
+ − 3298 /* font in this way. */
+ − 3299 /* */
+ − 3300 #define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000
+ − 3301 #define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002
+ − 3302 #define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004
+ − 3303 #define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008
+ − 3304 #define FT_FSTYPE_NO_SUBSETTING 0x0100
+ − 3305 #define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200
+ − 3306
+ − 3307
+ − 3308 /*************************************************************************/
+ − 3309 /* */
+ − 3310 /* <Function> */
+ − 3311 /* FT_Get_FSType_Flags */
+ − 3312 /* */
+ − 3313 /* <Description> */
+ − 3314 /* Return the fsType flags for a font. */
+ − 3315 /* */
+ − 3316 /* <Input> */
+ − 3317 /* face :: A handle to the source face object. */
+ − 3318 /* */
+ − 3319 /* <Return> */
+ − 3320 /* The fsType flags, @FT_FSTYPE_XXX. */
+ − 3321 /* */
+ − 3322 /* <Note> */
+ − 3323 /* Use this function rather than directly reading the `fs_type' field */
+ − 3324 /* in the @PS_FontInfoRec structure which is only guaranteed to */
+ − 3325 /* return the correct results for Type~1 fonts. */
+ − 3326 /* */
+ − 3327 FT_EXPORT( FT_UShort )
+ − 3328 FT_Get_FSType_Flags( FT_Face face );
+ − 3329
+ − 3330
+ − 3331 /*************************************************************************/
+ − 3332 /* */
+ − 3333 /* <Section> */
+ − 3334 /* glyph_variants */
+ − 3335 /* */
+ − 3336 /* <Title> */
+ − 3337 /* Glyph Variants */
+ − 3338 /* */
+ − 3339 /* <Abstract> */
+ − 3340 /* The FreeType~2 interface to Unicode Ideographic Variation */
+ − 3341 /* Sequences (IVS), using the SFNT cmap format~14. */
+ − 3342 /* */
+ − 3343 /* <Description> */
+ − 3344 /* Many CJK characters have variant forms. They are a sort of grey */
+ − 3345 /* area somewhere between being totally irrelevant and semantically */
+ − 3346 /* distinct; for this reason, the Unicode consortium decided to */
+ − 3347 /* introduce Ideographic Variation Sequences (IVS), consisting of a */
+ − 3348 /* Unicode base character and one of 240 variant selectors */
+ − 3349 /* (U+E0100-U+E01EF), instead of further extending the already huge */
+ − 3350 /* code range for CJK characters. */
+ − 3351 /* */
+ − 3352 /* An IVS is registered and unique; for further details please refer */
+ − 3353 /* to Unicode Technical Report #37, the Ideographic Variation */
+ − 3354 /* Database. To date (October 2007), the character with the most */
+ − 3355 /* variants is U+908A, having 8~such IVS. */
+ − 3356 /* */
+ − 3357 /* Adobe and MS decided to support IVS with a new cmap subtable */
+ − 3358 /* (format~14). It is an odd subtable because it is not a mapping of */
+ − 3359 /* input code points to glyphs, but contains lists of all variants */
+ − 3360 /* supported by the font. */
+ − 3361 /* */
+ − 3362 /* A variant may be either `default' or `non-default'. A default */
+ − 3363 /* variant is the one you will get for that code point if you look it */
+ − 3364 /* up in the standard Unicode cmap. A non-default variant is a */
+ − 3365 /* different glyph. */
+ − 3366 /* */
+ − 3367 /*************************************************************************/
+ − 3368
+ − 3369
+ − 3370 /*************************************************************************/
+ − 3371 /* */
+ − 3372 /* <Function> */
+ − 3373 /* FT_Face_GetCharVariantIndex */
+ − 3374 /* */
+ − 3375 /* <Description> */
+ − 3376 /* Return the glyph index of a given character code as modified by */
+ − 3377 /* the variation selector. */
+ − 3378 /* */
+ − 3379 /* <Input> */
+ − 3380 /* face :: */
+ − 3381 /* A handle to the source face object. */
+ − 3382 /* */
+ − 3383 /* charcode :: */
+ − 3384 /* The character code point in Unicode. */
+ − 3385 /* */
+ − 3386 /* variantSelector :: */
+ − 3387 /* The Unicode code point of the variation selector. */
+ − 3388 /* */
+ − 3389 /* <Return> */
+ − 3390 /* The glyph index. 0~means either `undefined character code', or */
+ − 3391 /* `undefined selector code', or `no variation selector cmap */
+ − 3392 /* subtable', or `current CharMap is not Unicode'. */
+ − 3393 /* */
+ − 3394 /* <Note> */
+ − 3395 /* If you use FreeType to manipulate the contents of font files */
+ − 3396 /* directly, be aware that the glyph index returned by this function */
+ − 3397 /* doesn't always correspond to the internal indices used within */
+ − 3398 /* the file. This is done to ensure that value~0 always corresponds */
+ − 3399 /* to the `missing glyph'. */
+ − 3400 /* */
+ − 3401 /* This function is only meaningful if */
+ − 3402 /* a) the font has a variation selector cmap sub table, */
+ − 3403 /* and */
+ − 3404 /* b) the current charmap has a Unicode encoding. */
+ − 3405 /* */
+ − 3406 /* <Since> */
+ − 3407 /* 2.3.6 */
+ − 3408 /* */
+ − 3409 FT_EXPORT( FT_UInt )
+ − 3410 FT_Face_GetCharVariantIndex( FT_Face face,
+ − 3411 FT_ULong charcode,
+ − 3412 FT_ULong variantSelector );
+ − 3413
+ − 3414
+ − 3415 /*************************************************************************/
+ − 3416 /* */
+ − 3417 /* <Function> */
+ − 3418 /* FT_Face_GetCharVariantIsDefault */
+ − 3419 /* */
+ − 3420 /* <Description> */
+ − 3421 /* Check whether this variant of this Unicode character is the one to */
+ − 3422 /* be found in the `cmap'. */
+ − 3423 /* */
+ − 3424 /* <Input> */
+ − 3425 /* face :: */
+ − 3426 /* A handle to the source face object. */
+ − 3427 /* */
+ − 3428 /* charcode :: */
+ − 3429 /* The character codepoint in Unicode. */
+ − 3430 /* */
+ − 3431 /* variantSelector :: */
+ − 3432 /* The Unicode codepoint of the variation selector. */
+ − 3433 /* */
+ − 3434 /* <Return> */
+ − 3435 /* 1~if found in the standard (Unicode) cmap, 0~if found in the */
+ − 3436 /* variation selector cmap, or -1 if it is not a variant. */
+ − 3437 /* */
+ − 3438 /* <Note> */
+ − 3439 /* This function is only meaningful if the font has a variation */
+ − 3440 /* selector cmap subtable. */
+ − 3441 /* */
+ − 3442 /* <Since> */
+ − 3443 /* 2.3.6 */
+ − 3444 /* */
+ − 3445 FT_EXPORT( FT_Int )
+ − 3446 FT_Face_GetCharVariantIsDefault( FT_Face face,
+ − 3447 FT_ULong charcode,
+ − 3448 FT_ULong variantSelector );
+ − 3449
+ − 3450
+ − 3451 /*************************************************************************/
+ − 3452 /* */
+ − 3453 /* <Function> */
+ − 3454 /* FT_Face_GetVariantSelectors */
+ − 3455 /* */
+ − 3456 /* <Description> */
+ − 3457 /* Return a zero-terminated list of Unicode variant selectors found */
+ − 3458 /* in the font. */
+ − 3459 /* */
+ − 3460 /* <Input> */
+ − 3461 /* face :: */
+ − 3462 /* A handle to the source face object. */
+ − 3463 /* */
+ − 3464 /* <Return> */
+ − 3465 /* A pointer to an array of selector code points, or NULL if there is */
+ − 3466 /* no valid variant selector cmap subtable. */
+ − 3467 /* */
+ − 3468 /* <Note> */
+ − 3469 /* The last item in the array is~0; the array is owned by the */
+ − 3470 /* @FT_Face object but can be overwritten or released on the next */
+ − 3471 /* call to a FreeType function. */
+ − 3472 /* */
+ − 3473 /* <Since> */
+ − 3474 /* 2.3.6 */
+ − 3475 /* */
+ − 3476 FT_EXPORT( FT_UInt32* )
+ − 3477 FT_Face_GetVariantSelectors( FT_Face face );
+ − 3478
+ − 3479
+ − 3480 /*************************************************************************/
+ − 3481 /* */
+ − 3482 /* <Function> */
+ − 3483 /* FT_Face_GetVariantsOfChar */
+ − 3484 /* */
+ − 3485 /* <Description> */
+ − 3486 /* Return a zero-terminated list of Unicode variant selectors found */
+ − 3487 /* for the specified character code. */
+ − 3488 /* */
+ − 3489 /* <Input> */
+ − 3490 /* face :: */
+ − 3491 /* A handle to the source face object. */
+ − 3492 /* */
+ − 3493 /* charcode :: */
+ − 3494 /* The character codepoint in Unicode. */
+ − 3495 /* */
+ − 3496 /* <Return> */
+ − 3497 /* A pointer to an array of variant selector code points which are */
+ − 3498 /* active for the given character, or NULL if the corresponding list */
+ − 3499 /* is empty. */
+ − 3500 /* */
+ − 3501 /* <Note> */
+ − 3502 /* The last item in the array is~0; the array is owned by the */
+ − 3503 /* @FT_Face object but can be overwritten or released on the next */
+ − 3504 /* call to a FreeType function. */
+ − 3505 /* */
+ − 3506 /* <Since> */
+ − 3507 /* 2.3.6 */
+ − 3508 /* */
+ − 3509 FT_EXPORT( FT_UInt32* )
+ − 3510 FT_Face_GetVariantsOfChar( FT_Face face,
+ − 3511 FT_ULong charcode );
+ − 3512
+ − 3513
+ − 3514 /*************************************************************************/
+ − 3515 /* */
+ − 3516 /* <Function> */
+ − 3517 /* FT_Face_GetCharsOfVariant */
+ − 3518 /* */
+ − 3519 /* <Description> */
+ − 3520 /* Return a zero-terminated list of Unicode character codes found for */
+ − 3521 /* the specified variant selector. */
+ − 3522 /* */
+ − 3523 /* <Input> */
+ − 3524 /* face :: */
+ − 3525 /* A handle to the source face object. */
+ − 3526 /* */
+ − 3527 /* variantSelector :: */
+ − 3528 /* The variant selector code point in Unicode. */
+ − 3529 /* */
+ − 3530 /* <Return> */
+ − 3531 /* A list of all the code points which are specified by this selector */
+ − 3532 /* (both default and non-default codes are returned) or NULL if there */
+ − 3533 /* is no valid cmap or the variant selector is invalid. */
+ − 3534 /* */
+ − 3535 /* <Note> */
+ − 3536 /* The last item in the array is~0; the array is owned by the */
+ − 3537 /* @FT_Face object but can be overwritten or released on the next */
+ − 3538 /* call to a FreeType function. */
+ − 3539 /* */
+ − 3540 /* <Since> */
+ − 3541 /* 2.3.6 */
+ − 3542 /* */
+ − 3543 FT_EXPORT( FT_UInt32* )
+ − 3544 FT_Face_GetCharsOfVariant( FT_Face face,
+ − 3545 FT_ULong variantSelector );
+ − 3546
+ − 3547
+ − 3548 /*************************************************************************/
+ − 3549 /* */
+ − 3550 /* <Section> */
+ − 3551 /* computations */
+ − 3552 /* */
+ − 3553 /* <Title> */
+ − 3554 /* Computations */
+ − 3555 /* */
+ − 3556 /* <Abstract> */
+ − 3557 /* Crunching fixed numbers and vectors. */
+ − 3558 /* */
+ − 3559 /* <Description> */
+ − 3560 /* This section contains various functions used to perform */
+ − 3561 /* computations on 16.16 fixed-float numbers or 2d vectors. */
+ − 3562 /* */
+ − 3563 /* <Order> */
+ − 3564 /* FT_MulDiv */
+ − 3565 /* FT_MulFix */
+ − 3566 /* FT_DivFix */
+ − 3567 /* FT_RoundFix */
+ − 3568 /* FT_CeilFix */
+ − 3569 /* FT_FloorFix */
+ − 3570 /* FT_Vector_Transform */
+ − 3571 /* FT_Matrix_Multiply */
+ − 3572 /* FT_Matrix_Invert */
+ − 3573 /* */
+ − 3574 /*************************************************************************/
+ − 3575
+ − 3576
+ − 3577 /*************************************************************************/
+ − 3578 /* */
+ − 3579 /* <Function> */
+ − 3580 /* FT_MulDiv */
+ − 3581 /* */
+ − 3582 /* <Description> */
+ − 3583 /* A very simple function used to perform the computation `(a*b)/c' */
+ − 3584 /* with maximal accuracy (it uses a 64-bit intermediate integer */
+ − 3585 /* whenever necessary). */
+ − 3586 /* */
+ − 3587 /* This function isn't necessarily as fast as some processor specific */
+ − 3588 /* operations, but is at least completely portable. */
+ − 3589 /* */
+ − 3590 /* <Input> */
+ − 3591 /* a :: The first multiplier. */
+ − 3592 /* b :: The second multiplier. */
+ − 3593 /* c :: The divisor. */
+ − 3594 /* */
+ − 3595 /* <Return> */
+ − 3596 /* The result of `(a*b)/c'. This function never traps when trying to */
+ − 3597 /* divide by zero; it simply returns `MaxInt' or `MinInt' depending */
+ − 3598 /* on the signs of `a' and `b'. */
+ − 3599 /* */
+ − 3600 FT_EXPORT( FT_Long )
+ − 3601 FT_MulDiv( FT_Long a,
+ − 3602 FT_Long b,
+ − 3603 FT_Long c );
+ − 3604
+ − 3605
+ − 3606 /* */
+ − 3607
+ − 3608 /* The following #if 0 ... #endif is for the documentation formatter, */
+ − 3609 /* hiding the internal `FT_MULFIX_INLINED' macro. */
+ − 3610
+ − 3611 #if 0
+ − 3612 /*************************************************************************/
+ − 3613 /* */
+ − 3614 /* <Function> */
+ − 3615 /* FT_MulFix */
+ − 3616 /* */
+ − 3617 /* <Description> */
+ − 3618 /* A very simple function used to perform the computation */
+ − 3619 /* `(a*b)/0x10000' with maximal accuracy. Most of the time this is */
+ − 3620 /* used to multiply a given value by a 16.16 fixed float factor. */
+ − 3621 /* */
+ − 3622 /* <Input> */
+ − 3623 /* a :: The first multiplier. */
+ − 3624 /* b :: The second multiplier. Use a 16.16 factor here whenever */
+ − 3625 /* possible (see note below). */
+ − 3626 /* */
+ − 3627 /* <Return> */
+ − 3628 /* The result of `(a*b)/0x10000'. */
+ − 3629 /* */
+ − 3630 /* <Note> */
+ − 3631 /* This function has been optimized for the case where the absolute */
+ − 3632 /* value of `a' is less than 2048, and `b' is a 16.16 scaling factor. */
+ − 3633 /* As this happens mainly when scaling from notional units to */
+ − 3634 /* fractional pixels in FreeType, it resulted in noticeable speed */
+ − 3635 /* improvements between versions 2.x and 1.x. */
+ − 3636 /* */
+ − 3637 /* As a conclusion, always try to place a 16.16 factor as the */
+ − 3638 /* _second_ argument of this function; this can make a great */
+ − 3639 /* difference. */
+ − 3640 /* */
+ − 3641 FT_EXPORT( FT_Long )
+ − 3642 FT_MulFix( FT_Long a,
+ − 3643 FT_Long b );
+ − 3644
+ − 3645 /* */
+ − 3646 #endif
+ − 3647
+ − 3648 #ifdef FT_MULFIX_INLINED
+ − 3649 #define FT_MulFix( a, b ) FT_MULFIX_INLINED( a, b )
+ − 3650 #else
+ − 3651 FT_EXPORT( FT_Long )
+ − 3652 FT_MulFix( FT_Long a,
+ − 3653 FT_Long b );
+ − 3654 #endif
+ − 3655
+ − 3656
+ − 3657 /*************************************************************************/
+ − 3658 /* */
+ − 3659 /* <Function> */
+ − 3660 /* FT_DivFix */
+ − 3661 /* */
+ − 3662 /* <Description> */
+ − 3663 /* A very simple function used to perform the computation */
+ − 3664 /* `(a*0x10000)/b' with maximal accuracy. Most of the time, this is */
+ − 3665 /* used to divide a given value by a 16.16 fixed float factor. */
+ − 3666 /* */
+ − 3667 /* <Input> */
+ − 3668 /* a :: The first multiplier. */
+ − 3669 /* b :: The second multiplier. Use a 16.16 factor here whenever */
+ − 3670 /* possible (see note below). */
+ − 3671 /* */
+ − 3672 /* <Return> */
+ − 3673 /* The result of `(a*0x10000)/b'. */
+ − 3674 /* */
+ − 3675 /* <Note> */
+ − 3676 /* The optimization for FT_DivFix() is simple: If (a~<<~16) fits in */
+ − 3677 /* 32~bits, then the division is computed directly. Otherwise, we */
+ − 3678 /* use a specialized version of @FT_MulDiv. */
+ − 3679 /* */
+ − 3680 FT_EXPORT( FT_Long )
+ − 3681 FT_DivFix( FT_Long a,
+ − 3682 FT_Long b );
+ − 3683
+ − 3684
+ − 3685 /*************************************************************************/
+ − 3686 /* */
+ − 3687 /* <Function> */
+ − 3688 /* FT_RoundFix */
+ − 3689 /* */
+ − 3690 /* <Description> */
+ − 3691 /* A very simple function used to round a 16.16 fixed number. */
+ − 3692 /* */
+ − 3693 /* <Input> */
+ − 3694 /* a :: The number to be rounded. */
+ − 3695 /* */
+ − 3696 /* <Return> */
+ − 3697 /* The result of `(a + 0x8000) & -0x10000'. */
+ − 3698 /* */
+ − 3699 FT_EXPORT( FT_Fixed )
+ − 3700 FT_RoundFix( FT_Fixed a );
+ − 3701
+ − 3702
+ − 3703 /*************************************************************************/
+ − 3704 /* */
+ − 3705 /* <Function> */
+ − 3706 /* FT_CeilFix */
+ − 3707 /* */
+ − 3708 /* <Description> */
+ − 3709 /* A very simple function used to compute the ceiling function of a */
+ − 3710 /* 16.16 fixed number. */
+ − 3711 /* */
+ − 3712 /* <Input> */
+ − 3713 /* a :: The number for which the ceiling function is to be computed. */
+ − 3714 /* */
+ − 3715 /* <Return> */
+ − 3716 /* The result of `(a + 0x10000 - 1) & -0x10000'. */
+ − 3717 /* */
+ − 3718 FT_EXPORT( FT_Fixed )
+ − 3719 FT_CeilFix( FT_Fixed a );
+ − 3720
+ − 3721
+ − 3722 /*************************************************************************/
+ − 3723 /* */
+ − 3724 /* <Function> */
+ − 3725 /* FT_FloorFix */
+ − 3726 /* */
+ − 3727 /* <Description> */
+ − 3728 /* A very simple function used to compute the floor function of a */
+ − 3729 /* 16.16 fixed number. */
+ − 3730 /* */
+ − 3731 /* <Input> */
+ − 3732 /* a :: The number for which the floor function is to be computed. */
+ − 3733 /* */
+ − 3734 /* <Return> */
+ − 3735 /* The result of `a & -0x10000'. */
+ − 3736 /* */
+ − 3737 FT_EXPORT( FT_Fixed )
+ − 3738 FT_FloorFix( FT_Fixed a );
+ − 3739
+ − 3740
+ − 3741 /*************************************************************************/
+ − 3742 /* */
+ − 3743 /* <Function> */
+ − 3744 /* FT_Vector_Transform */
+ − 3745 /* */
+ − 3746 /* <Description> */
+ − 3747 /* Transform a single vector through a 2x2 matrix. */
+ − 3748 /* */
+ − 3749 /* <InOut> */
+ − 3750 /* vector :: The target vector to transform. */
+ − 3751 /* */
+ − 3752 /* <Input> */
+ − 3753 /* matrix :: A pointer to the source 2x2 matrix. */
+ − 3754 /* */
+ − 3755 /* <Note> */
+ − 3756 /* The result is undefined if either `vector' or `matrix' is invalid. */
+ − 3757 /* */
+ − 3758 FT_EXPORT( void )
+ − 3759 FT_Vector_Transform( FT_Vector* vec,
+ − 3760 const FT_Matrix* matrix );
+ − 3761
+ − 3762
+ − 3763 /*************************************************************************/
+ − 3764 /* */
+ − 3765 /* <Section> */
+ − 3766 /* version */
+ − 3767 /* */
+ − 3768 /* <Title> */
+ − 3769 /* FreeType Version */
+ − 3770 /* */
+ − 3771 /* <Abstract> */
+ − 3772 /* Functions and macros related to FreeType versions. */
+ − 3773 /* */
+ − 3774 /* <Description> */
+ − 3775 /* Note that those functions and macros are of limited use because */
+ − 3776 /* even a new release of FreeType with only documentation changes */
+ − 3777 /* increases the version number. */
+ − 3778 /* */
+ − 3779 /*************************************************************************/
+ − 3780
+ − 3781
+ − 3782 /*************************************************************************
+ − 3783 *
+ − 3784 * @enum:
+ − 3785 * FREETYPE_XXX
+ − 3786 *
+ − 3787 * @description:
+ − 3788 * These three macros identify the FreeType source code version.
+ − 3789 * Use @FT_Library_Version to access them at runtime.
+ − 3790 *
+ − 3791 * @values:
+ − 3792 * FREETYPE_MAJOR :: The major version number.
+ − 3793 * FREETYPE_MINOR :: The minor version number.
+ − 3794 * FREETYPE_PATCH :: The patch level.
+ − 3795 *
+ − 3796 * @note:
+ − 3797 * The version number of FreeType if built as a dynamic link library
+ − 3798 * with the `libtool' package is _not_ controlled by these three
+ − 3799 * macros.
+ − 3800 *
+ − 3801 */
+ − 3802 #define FREETYPE_MAJOR 2
+ − 3803 #define FREETYPE_MINOR 4
+ − 3804 #define FREETYPE_PATCH 4
+ − 3805
+ − 3806
+ − 3807 /*************************************************************************/
+ − 3808 /* */
+ − 3809 /* <Function> */
+ − 3810 /* FT_Library_Version */
+ − 3811 /* */
+ − 3812 /* <Description> */
+ − 3813 /* Return the version of the FreeType library being used. This is */
+ − 3814 /* useful when dynamically linking to the library, since one cannot */
+ − 3815 /* use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and */
+ − 3816 /* @FREETYPE_PATCH. */
+ − 3817 /* */
+ − 3818 /* <Input> */
+ − 3819 /* library :: A source library handle. */
+ − 3820 /* */
+ − 3821 /* <Output> */
+ − 3822 /* amajor :: The major version number. */
+ − 3823 /* */
+ − 3824 /* aminor :: The minor version number. */
+ − 3825 /* */
+ − 3826 /* apatch :: The patch version number. */
+ − 3827 /* */
+ − 3828 /* <Note> */
+ − 3829 /* The reason why this function takes a `library' argument is because */
+ − 3830 /* certain programs implement library initialization in a custom way */
+ − 3831 /* that doesn't use @FT_Init_FreeType. */
+ − 3832 /* */
+ − 3833 /* In such cases, the library version might not be available before */
+ − 3834 /* the library object has been created. */
+ − 3835 /* */
+ − 3836 FT_EXPORT( void )
+ − 3837 FT_Library_Version( FT_Library library,
+ − 3838 FT_Int *amajor,
+ − 3839 FT_Int *aminor,
+ − 3840 FT_Int *apatch );
+ − 3841
+ − 3842
+ − 3843 /*************************************************************************/
+ − 3844 /* */
+ − 3845 /* <Function> */
+ − 3846 /* FT_Face_CheckTrueTypePatents */
+ − 3847 /* */
+ − 3848 /* <Description> */
+ − 3849 /* Parse all bytecode instructions of a TrueType font file to check */
+ − 3850 /* whether any of the patented opcodes are used. This is only useful */
+ − 3851 /* if you want to be able to use the unpatented hinter with */
+ − 3852 /* fonts that do *not* use these opcodes. */
+ − 3853 /* */
+ − 3854 /* Note that this function parses *all* glyph instructions in the */
+ − 3855 /* font file, which may be slow. */
+ − 3856 /* */
+ − 3857 /* <Input> */
+ − 3858 /* face :: A face handle. */
+ − 3859 /* */
+ − 3860 /* <Return> */
+ − 3861 /* 1~if this is a TrueType font that uses one of the patented */
+ − 3862 /* opcodes, 0~otherwise. */
+ − 3863 /* */
+ − 3864 /* <Note> */
+ − 3865 /* Since May 2010, TrueType hinting is no longer patented. */
+ − 3866 /* */
+ − 3867 /* <Since> */
+ − 3868 /* 2.3.5 */
+ − 3869 /* */
+ − 3870 FT_EXPORT( FT_Bool )
+ − 3871 FT_Face_CheckTrueTypePatents( FT_Face face );
+ − 3872
+ − 3873
+ − 3874 /*************************************************************************/
+ − 3875 /* */
+ − 3876 /* <Function> */
+ − 3877 /* FT_Face_SetUnpatentedHinting */
+ − 3878 /* */
+ − 3879 /* <Description> */
+ − 3880 /* Enable or disable the unpatented hinter for a given face. */
+ − 3881 /* Only enable it if you have determined that the face doesn't */
+ − 3882 /* use any patented opcodes (see @FT_Face_CheckTrueTypePatents). */
+ − 3883 /* */
+ − 3884 /* <Input> */
+ − 3885 /* face :: A face handle. */
+ − 3886 /* */
+ − 3887 /* value :: New boolean setting. */
+ − 3888 /* */
+ − 3889 /* <Return> */
+ − 3890 /* The old setting value. This will always be false if this is not */
+ − 3891 /* an SFNT font, or if the unpatented hinter is not compiled in this */
+ − 3892 /* instance of the library. */
+ − 3893 /* */
+ − 3894 /* <Note> */
+ − 3895 /* Since May 2010, TrueType hinting is no longer patented. */
+ − 3896 /* */
+ − 3897 /* <Since> */
+ − 3898 /* 2.3.5 */
+ − 3899 /* */
+ − 3900 FT_EXPORT( FT_Bool )
+ − 3901 FT_Face_SetUnpatentedHinting( FT_Face face,
+ − 3902 FT_Bool value );
+ − 3903
+ − 3904 /* */
+ − 3905
+ − 3906
+ − 3907 FT_END_HEADER
+ − 3908
+ − 3909 #endif /* __FREETYPE_H__ */
+ − 3910
+ − 3911
+ − 3912 /* END */