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annotate libs/ft2static/freetype/ftstroke.h @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /***************************************************************************/
nuclear@0 2 /* */
nuclear@0 3 /* ftstroke.h */
nuclear@0 4 /* */
nuclear@0 5 /* FreeType path stroker (specification). */
nuclear@0 6 /* */
nuclear@0 7 /* Copyright 2002, 2003, 2004, 2005, 2006, 2008, 2009 by */
nuclear@0 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
nuclear@0 9 /* */
nuclear@0 10 /* This file is part of the FreeType project, and may only be used, */
nuclear@0 11 /* modified, and distributed under the terms of the FreeType project */
nuclear@0 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
nuclear@0 13 /* this file you indicate that you have read the license and */
nuclear@0 14 /* understand and accept it fully. */
nuclear@0 15 /* */
nuclear@0 16 /***************************************************************************/
nuclear@0 17
nuclear@0 18
nuclear@0 19 #ifndef __FT_STROKE_H__
nuclear@0 20 #define __FT_STROKE_H__
nuclear@0 21
nuclear@0 22 #include <ft2build.h>
nuclear@0 23 #include FT_OUTLINE_H
nuclear@0 24 #include FT_GLYPH_H
nuclear@0 25
nuclear@0 26
nuclear@0 27 FT_BEGIN_HEADER
nuclear@0 28
nuclear@0 29
nuclear@0 30 /************************************************************************
nuclear@0 31 *
nuclear@0 32 * @section:
nuclear@0 33 * glyph_stroker
nuclear@0 34 *
nuclear@0 35 * @title:
nuclear@0 36 * Glyph Stroker
nuclear@0 37 *
nuclear@0 38 * @abstract:
nuclear@0 39 * Generating bordered and stroked glyphs.
nuclear@0 40 *
nuclear@0 41 * @description:
nuclear@0 42 * This component generates stroked outlines of a given vectorial
nuclear@0 43 * glyph. It also allows you to retrieve the `outside' and/or the
nuclear@0 44 * `inside' borders of the stroke.
nuclear@0 45 *
nuclear@0 46 * This can be useful to generate `bordered' glyph, i.e., glyphs
nuclear@0 47 * displayed with a coloured (and anti-aliased) border around their
nuclear@0 48 * shape.
nuclear@0 49 */
nuclear@0 50
nuclear@0 51
nuclear@0 52 /**************************************************************
nuclear@0 53 *
nuclear@0 54 * @type:
nuclear@0 55 * FT_Stroker
nuclear@0 56 *
nuclear@0 57 * @description:
nuclear@0 58 * Opaque handler to a path stroker object.
nuclear@0 59 */
nuclear@0 60 typedef struct FT_StrokerRec_* FT_Stroker;
nuclear@0 61
nuclear@0 62
nuclear@0 63 /**************************************************************
nuclear@0 64 *
nuclear@0 65 * @enum:
nuclear@0 66 * FT_Stroker_LineJoin
nuclear@0 67 *
nuclear@0 68 * @description:
nuclear@0 69 * These values determine how two joining lines are rendered
nuclear@0 70 * in a stroker.
nuclear@0 71 *
nuclear@0 72 * @values:
nuclear@0 73 * FT_STROKER_LINEJOIN_ROUND ::
nuclear@0 74 * Used to render rounded line joins. Circular arcs are used
nuclear@0 75 * to join two lines smoothly.
nuclear@0 76 *
nuclear@0 77 * FT_STROKER_LINEJOIN_BEVEL ::
nuclear@0 78 * Used to render beveled line joins; i.e., the two joining lines
nuclear@0 79 * are extended until they intersect.
nuclear@0 80 *
nuclear@0 81 * FT_STROKER_LINEJOIN_MITER ::
nuclear@0 82 * Same as beveled rendering, except that an additional line
nuclear@0 83 * break is added if the angle between the two joining lines
nuclear@0 84 * is too closed (this is useful to avoid unpleasant spikes
nuclear@0 85 * in beveled rendering).
nuclear@0 86 */
nuclear@0 87 typedef enum FT_Stroker_LineJoin_
nuclear@0 88 {
nuclear@0 89 FT_STROKER_LINEJOIN_ROUND = 0,
nuclear@0 90 FT_STROKER_LINEJOIN_BEVEL,
nuclear@0 91 FT_STROKER_LINEJOIN_MITER
nuclear@0 92
nuclear@0 93 } FT_Stroker_LineJoin;
nuclear@0 94
nuclear@0 95
nuclear@0 96 /**************************************************************
nuclear@0 97 *
nuclear@0 98 * @enum:
nuclear@0 99 * FT_Stroker_LineCap
nuclear@0 100 *
nuclear@0 101 * @description:
nuclear@0 102 * These values determine how the end of opened sub-paths are
nuclear@0 103 * rendered in a stroke.
nuclear@0 104 *
nuclear@0 105 * @values:
nuclear@0 106 * FT_STROKER_LINECAP_BUTT ::
nuclear@0 107 * The end of lines is rendered as a full stop on the last
nuclear@0 108 * point itself.
nuclear@0 109 *
nuclear@0 110 * FT_STROKER_LINECAP_ROUND ::
nuclear@0 111 * The end of lines is rendered as a half-circle around the
nuclear@0 112 * last point.
nuclear@0 113 *
nuclear@0 114 * FT_STROKER_LINECAP_SQUARE ::
nuclear@0 115 * The end of lines is rendered as a square around the
nuclear@0 116 * last point.
nuclear@0 117 */
nuclear@0 118 typedef enum FT_Stroker_LineCap_
nuclear@0 119 {
nuclear@0 120 FT_STROKER_LINECAP_BUTT = 0,
nuclear@0 121 FT_STROKER_LINECAP_ROUND,
nuclear@0 122 FT_STROKER_LINECAP_SQUARE
nuclear@0 123
nuclear@0 124 } FT_Stroker_LineCap;
nuclear@0 125
nuclear@0 126
nuclear@0 127 /**************************************************************
nuclear@0 128 *
nuclear@0 129 * @enum:
nuclear@0 130 * FT_StrokerBorder
nuclear@0 131 *
nuclear@0 132 * @description:
nuclear@0 133 * These values are used to select a given stroke border
nuclear@0 134 * in @FT_Stroker_GetBorderCounts and @FT_Stroker_ExportBorder.
nuclear@0 135 *
nuclear@0 136 * @values:
nuclear@0 137 * FT_STROKER_BORDER_LEFT ::
nuclear@0 138 * Select the left border, relative to the drawing direction.
nuclear@0 139 *
nuclear@0 140 * FT_STROKER_BORDER_RIGHT ::
nuclear@0 141 * Select the right border, relative to the drawing direction.
nuclear@0 142 *
nuclear@0 143 * @note:
nuclear@0 144 * Applications are generally interested in the `inside' and `outside'
nuclear@0 145 * borders. However, there is no direct mapping between these and the
nuclear@0 146 * `left' and `right' ones, since this really depends on the glyph's
nuclear@0 147 * drawing orientation, which varies between font formats.
nuclear@0 148 *
nuclear@0 149 * You can however use @FT_Outline_GetInsideBorder and
nuclear@0 150 * @FT_Outline_GetOutsideBorder to get these.
nuclear@0 151 */
nuclear@0 152 typedef enum FT_StrokerBorder_
nuclear@0 153 {
nuclear@0 154 FT_STROKER_BORDER_LEFT = 0,
nuclear@0 155 FT_STROKER_BORDER_RIGHT
nuclear@0 156
nuclear@0 157 } FT_StrokerBorder;
nuclear@0 158
nuclear@0 159
nuclear@0 160 /**************************************************************
nuclear@0 161 *
nuclear@0 162 * @function:
nuclear@0 163 * FT_Outline_GetInsideBorder
nuclear@0 164 *
nuclear@0 165 * @description:
nuclear@0 166 * Retrieve the @FT_StrokerBorder value corresponding to the
nuclear@0 167 * `inside' borders of a given outline.
nuclear@0 168 *
nuclear@0 169 * @input:
nuclear@0 170 * outline ::
nuclear@0 171 * The source outline handle.
nuclear@0 172 *
nuclear@0 173 * @return:
nuclear@0 174 * The border index. @FT_STROKER_BORDER_RIGHT for empty or invalid
nuclear@0 175 * outlines.
nuclear@0 176 */
nuclear@0 177 FT_EXPORT( FT_StrokerBorder )
nuclear@0 178 FT_Outline_GetInsideBorder( FT_Outline* outline );
nuclear@0 179
nuclear@0 180
nuclear@0 181 /**************************************************************
nuclear@0 182 *
nuclear@0 183 * @function:
nuclear@0 184 * FT_Outline_GetOutsideBorder
nuclear@0 185 *
nuclear@0 186 * @description:
nuclear@0 187 * Retrieve the @FT_StrokerBorder value corresponding to the
nuclear@0 188 * `outside' borders of a given outline.
nuclear@0 189 *
nuclear@0 190 * @input:
nuclear@0 191 * outline ::
nuclear@0 192 * The source outline handle.
nuclear@0 193 *
nuclear@0 194 * @return:
nuclear@0 195 * The border index. @FT_STROKER_BORDER_LEFT for empty or invalid
nuclear@0 196 * outlines.
nuclear@0 197 */
nuclear@0 198 FT_EXPORT( FT_StrokerBorder )
nuclear@0 199 FT_Outline_GetOutsideBorder( FT_Outline* outline );
nuclear@0 200
nuclear@0 201
nuclear@0 202 /**************************************************************
nuclear@0 203 *
nuclear@0 204 * @function:
nuclear@0 205 * FT_Stroker_New
nuclear@0 206 *
nuclear@0 207 * @description:
nuclear@0 208 * Create a new stroker object.
nuclear@0 209 *
nuclear@0 210 * @input:
nuclear@0 211 * library ::
nuclear@0 212 * FreeType library handle.
nuclear@0 213 *
nuclear@0 214 * @output:
nuclear@0 215 * astroker ::
nuclear@0 216 * A new stroker object handle. NULL in case of error.
nuclear@0 217 *
nuclear@0 218 * @return:
nuclear@0 219 * FreeType error code. 0~means success.
nuclear@0 220 */
nuclear@0 221 FT_EXPORT( FT_Error )
nuclear@0 222 FT_Stroker_New( FT_Library library,
nuclear@0 223 FT_Stroker *astroker );
nuclear@0 224
nuclear@0 225
nuclear@0 226 /**************************************************************
nuclear@0 227 *
nuclear@0 228 * @function:
nuclear@0 229 * FT_Stroker_Set
nuclear@0 230 *
nuclear@0 231 * @description:
nuclear@0 232 * Reset a stroker object's attributes.
nuclear@0 233 *
nuclear@0 234 * @input:
nuclear@0 235 * stroker ::
nuclear@0 236 * The target stroker handle.
nuclear@0 237 *
nuclear@0 238 * radius ::
nuclear@0 239 * The border radius.
nuclear@0 240 *
nuclear@0 241 * line_cap ::
nuclear@0 242 * The line cap style.
nuclear@0 243 *
nuclear@0 244 * line_join ::
nuclear@0 245 * The line join style.
nuclear@0 246 *
nuclear@0 247 * miter_limit ::
nuclear@0 248 * The miter limit for the FT_STROKER_LINEJOIN_MITER style,
nuclear@0 249 * expressed as 16.16 fixed point value.
nuclear@0 250 *
nuclear@0 251 * @note:
nuclear@0 252 * The radius is expressed in the same units as the outline
nuclear@0 253 * coordinates.
nuclear@0 254 */
nuclear@0 255 FT_EXPORT( void )
nuclear@0 256 FT_Stroker_Set( FT_Stroker stroker,
nuclear@0 257 FT_Fixed radius,
nuclear@0 258 FT_Stroker_LineCap line_cap,
nuclear@0 259 FT_Stroker_LineJoin line_join,
nuclear@0 260 FT_Fixed miter_limit );
nuclear@0 261
nuclear@0 262
nuclear@0 263 /**************************************************************
nuclear@0 264 *
nuclear@0 265 * @function:
nuclear@0 266 * FT_Stroker_Rewind
nuclear@0 267 *
nuclear@0 268 * @description:
nuclear@0 269 * Reset a stroker object without changing its attributes.
nuclear@0 270 * You should call this function before beginning a new
nuclear@0 271 * series of calls to @FT_Stroker_BeginSubPath or
nuclear@0 272 * @FT_Stroker_EndSubPath.
nuclear@0 273 *
nuclear@0 274 * @input:
nuclear@0 275 * stroker ::
nuclear@0 276 * The target stroker handle.
nuclear@0 277 */
nuclear@0 278 FT_EXPORT( void )
nuclear@0 279 FT_Stroker_Rewind( FT_Stroker stroker );
nuclear@0 280
nuclear@0 281
nuclear@0 282 /**************************************************************
nuclear@0 283 *
nuclear@0 284 * @function:
nuclear@0 285 * FT_Stroker_ParseOutline
nuclear@0 286 *
nuclear@0 287 * @description:
nuclear@0 288 * A convenience function used to parse a whole outline with
nuclear@0 289 * the stroker. The resulting outline(s) can be retrieved
nuclear@0 290 * later by functions like @FT_Stroker_GetCounts and @FT_Stroker_Export.
nuclear@0 291 *
nuclear@0 292 * @input:
nuclear@0 293 * stroker ::
nuclear@0 294 * The target stroker handle.
nuclear@0 295 *
nuclear@0 296 * outline ::
nuclear@0 297 * The source outline.
nuclear@0 298 *
nuclear@0 299 * opened ::
nuclear@0 300 * A boolean. If~1, the outline is treated as an open path instead
nuclear@0 301 * of a closed one.
nuclear@0 302 *
nuclear@0 303 * @return:
nuclear@0 304 * FreeType error code. 0~means success.
nuclear@0 305 *
nuclear@0 306 * @note:
nuclear@0 307 * If `opened' is~0 (the default), the outline is treated as a closed
nuclear@0 308 * path, and the stroker generates two distinct `border' outlines.
nuclear@0 309 *
nuclear@0 310 * If `opened' is~1, the outline is processed as an open path, and the
nuclear@0 311 * stroker generates a single `stroke' outline.
nuclear@0 312 *
nuclear@0 313 * This function calls @FT_Stroker_Rewind automatically.
nuclear@0 314 */
nuclear@0 315 FT_EXPORT( FT_Error )
nuclear@0 316 FT_Stroker_ParseOutline( FT_Stroker stroker,
nuclear@0 317 FT_Outline* outline,
nuclear@0 318 FT_Bool opened );
nuclear@0 319
nuclear@0 320
nuclear@0 321 /**************************************************************
nuclear@0 322 *
nuclear@0 323 * @function:
nuclear@0 324 * FT_Stroker_BeginSubPath
nuclear@0 325 *
nuclear@0 326 * @description:
nuclear@0 327 * Start a new sub-path in the stroker.
nuclear@0 328 *
nuclear@0 329 * @input:
nuclear@0 330 * stroker ::
nuclear@0 331 * The target stroker handle.
nuclear@0 332 *
nuclear@0 333 * to ::
nuclear@0 334 * A pointer to the start vector.
nuclear@0 335 *
nuclear@0 336 * open ::
nuclear@0 337 * A boolean. If~1, the sub-path is treated as an open one.
nuclear@0 338 *
nuclear@0 339 * @return:
nuclear@0 340 * FreeType error code. 0~means success.
nuclear@0 341 *
nuclear@0 342 * @note:
nuclear@0 343 * This function is useful when you need to stroke a path that is
nuclear@0 344 * not stored as an @FT_Outline object.
nuclear@0 345 */
nuclear@0 346 FT_EXPORT( FT_Error )
nuclear@0 347 FT_Stroker_BeginSubPath( FT_Stroker stroker,
nuclear@0 348 FT_Vector* to,
nuclear@0 349 FT_Bool open );
nuclear@0 350
nuclear@0 351
nuclear@0 352 /**************************************************************
nuclear@0 353 *
nuclear@0 354 * @function:
nuclear@0 355 * FT_Stroker_EndSubPath
nuclear@0 356 *
nuclear@0 357 * @description:
nuclear@0 358 * Close the current sub-path in the stroker.
nuclear@0 359 *
nuclear@0 360 * @input:
nuclear@0 361 * stroker ::
nuclear@0 362 * The target stroker handle.
nuclear@0 363 *
nuclear@0 364 * @return:
nuclear@0 365 * FreeType error code. 0~means success.
nuclear@0 366 *
nuclear@0 367 * @note:
nuclear@0 368 * You should call this function after @FT_Stroker_BeginSubPath.
nuclear@0 369 * If the subpath was not `opened', this function `draws' a
nuclear@0 370 * single line segment to the start position when needed.
nuclear@0 371 */
nuclear@0 372 FT_EXPORT( FT_Error )
nuclear@0 373 FT_Stroker_EndSubPath( FT_Stroker stroker );
nuclear@0 374
nuclear@0 375
nuclear@0 376 /**************************************************************
nuclear@0 377 *
nuclear@0 378 * @function:
nuclear@0 379 * FT_Stroker_LineTo
nuclear@0 380 *
nuclear@0 381 * @description:
nuclear@0 382 * `Draw' a single line segment in the stroker's current sub-path,
nuclear@0 383 * from the last position.
nuclear@0 384 *
nuclear@0 385 * @input:
nuclear@0 386 * stroker ::
nuclear@0 387 * The target stroker handle.
nuclear@0 388 *
nuclear@0 389 * to ::
nuclear@0 390 * A pointer to the destination point.
nuclear@0 391 *
nuclear@0 392 * @return:
nuclear@0 393 * FreeType error code. 0~means success.
nuclear@0 394 *
nuclear@0 395 * @note:
nuclear@0 396 * You should call this function between @FT_Stroker_BeginSubPath and
nuclear@0 397 * @FT_Stroker_EndSubPath.
nuclear@0 398 */
nuclear@0 399 FT_EXPORT( FT_Error )
nuclear@0 400 FT_Stroker_LineTo( FT_Stroker stroker,
nuclear@0 401 FT_Vector* to );
nuclear@0 402
nuclear@0 403
nuclear@0 404 /**************************************************************
nuclear@0 405 *
nuclear@0 406 * @function:
nuclear@0 407 * FT_Stroker_ConicTo
nuclear@0 408 *
nuclear@0 409 * @description:
nuclear@0 410 * `Draw' a single quadratic Bézier in the stroker's current sub-path,
nuclear@0 411 * from the last position.
nuclear@0 412 *
nuclear@0 413 * @input:
nuclear@0 414 * stroker ::
nuclear@0 415 * The target stroker handle.
nuclear@0 416 *
nuclear@0 417 * control ::
nuclear@0 418 * A pointer to a Bézier control point.
nuclear@0 419 *
nuclear@0 420 * to ::
nuclear@0 421 * A pointer to the destination point.
nuclear@0 422 *
nuclear@0 423 * @return:
nuclear@0 424 * FreeType error code. 0~means success.
nuclear@0 425 *
nuclear@0 426 * @note:
nuclear@0 427 * You should call this function between @FT_Stroker_BeginSubPath and
nuclear@0 428 * @FT_Stroker_EndSubPath.
nuclear@0 429 */
nuclear@0 430 FT_EXPORT( FT_Error )
nuclear@0 431 FT_Stroker_ConicTo( FT_Stroker stroker,
nuclear@0 432 FT_Vector* control,
nuclear@0 433 FT_Vector* to );
nuclear@0 434
nuclear@0 435
nuclear@0 436 /**************************************************************
nuclear@0 437 *
nuclear@0 438 * @function:
nuclear@0 439 * FT_Stroker_CubicTo
nuclear@0 440 *
nuclear@0 441 * @description:
nuclear@0 442 * `Draw' a single cubic Bézier in the stroker's current sub-path,
nuclear@0 443 * from the last position.
nuclear@0 444 *
nuclear@0 445 * @input:
nuclear@0 446 * stroker ::
nuclear@0 447 * The target stroker handle.
nuclear@0 448 *
nuclear@0 449 * control1 ::
nuclear@0 450 * A pointer to the first Bézier control point.
nuclear@0 451 *
nuclear@0 452 * control2 ::
nuclear@0 453 * A pointer to second Bézier control point.
nuclear@0 454 *
nuclear@0 455 * to ::
nuclear@0 456 * A pointer to the destination point.
nuclear@0 457 *
nuclear@0 458 * @return:
nuclear@0 459 * FreeType error code. 0~means success.
nuclear@0 460 *
nuclear@0 461 * @note:
nuclear@0 462 * You should call this function between @FT_Stroker_BeginSubPath and
nuclear@0 463 * @FT_Stroker_EndSubPath.
nuclear@0 464 */
nuclear@0 465 FT_EXPORT( FT_Error )
nuclear@0 466 FT_Stroker_CubicTo( FT_Stroker stroker,
nuclear@0 467 FT_Vector* control1,
nuclear@0 468 FT_Vector* control2,
nuclear@0 469 FT_Vector* to );
nuclear@0 470
nuclear@0 471
nuclear@0 472 /**************************************************************
nuclear@0 473 *
nuclear@0 474 * @function:
nuclear@0 475 * FT_Stroker_GetBorderCounts
nuclear@0 476 *
nuclear@0 477 * @description:
nuclear@0 478 * Call this function once you have finished parsing your paths
nuclear@0 479 * with the stroker. It returns the number of points and
nuclear@0 480 * contours necessary to export one of the `border' or `stroke'
nuclear@0 481 * outlines generated by the stroker.
nuclear@0 482 *
nuclear@0 483 * @input:
nuclear@0 484 * stroker ::
nuclear@0 485 * The target stroker handle.
nuclear@0 486 *
nuclear@0 487 * border ::
nuclear@0 488 * The border index.
nuclear@0 489 *
nuclear@0 490 * @output:
nuclear@0 491 * anum_points ::
nuclear@0 492 * The number of points.
nuclear@0 493 *
nuclear@0 494 * anum_contours ::
nuclear@0 495 * The number of contours.
nuclear@0 496 *
nuclear@0 497 * @return:
nuclear@0 498 * FreeType error code. 0~means success.
nuclear@0 499 *
nuclear@0 500 * @note:
nuclear@0 501 * When an outline, or a sub-path, is `closed', the stroker generates
nuclear@0 502 * two independent `border' outlines, named `left' and `right'.
nuclear@0 503 *
nuclear@0 504 * When the outline, or a sub-path, is `opened', the stroker merges
nuclear@0 505 * the `border' outlines with caps. The `left' border receives all
nuclear@0 506 * points, while the `right' border becomes empty.
nuclear@0 507 *
nuclear@0 508 * Use the function @FT_Stroker_GetCounts instead if you want to
nuclear@0 509 * retrieve the counts associated to both borders.
nuclear@0 510 */
nuclear@0 511 FT_EXPORT( FT_Error )
nuclear@0 512 FT_Stroker_GetBorderCounts( FT_Stroker stroker,
nuclear@0 513 FT_StrokerBorder border,
nuclear@0 514 FT_UInt *anum_points,
nuclear@0 515 FT_UInt *anum_contours );
nuclear@0 516
nuclear@0 517
nuclear@0 518 /**************************************************************
nuclear@0 519 *
nuclear@0 520 * @function:
nuclear@0 521 * FT_Stroker_ExportBorder
nuclear@0 522 *
nuclear@0 523 * @description:
nuclear@0 524 * Call this function after @FT_Stroker_GetBorderCounts to
nuclear@0 525 * export the corresponding border to your own @FT_Outline
nuclear@0 526 * structure.
nuclear@0 527 *
nuclear@0 528 * Note that this function appends the border points and
nuclear@0 529 * contours to your outline, but does not try to resize its
nuclear@0 530 * arrays.
nuclear@0 531 *
nuclear@0 532 * @input:
nuclear@0 533 * stroker ::
nuclear@0 534 * The target stroker handle.
nuclear@0 535 *
nuclear@0 536 * border ::
nuclear@0 537 * The border index.
nuclear@0 538 *
nuclear@0 539 * outline ::
nuclear@0 540 * The target outline handle.
nuclear@0 541 *
nuclear@0 542 * @note:
nuclear@0 543 * Always call this function after @FT_Stroker_GetBorderCounts to
nuclear@0 544 * get sure that there is enough room in your @FT_Outline object to
nuclear@0 545 * receive all new data.
nuclear@0 546 *
nuclear@0 547 * When an outline, or a sub-path, is `closed', the stroker generates
nuclear@0 548 * two independent `border' outlines, named `left' and `right'
nuclear@0 549 *
nuclear@0 550 * When the outline, or a sub-path, is `opened', the stroker merges
nuclear@0 551 * the `border' outlines with caps. The `left' border receives all
nuclear@0 552 * points, while the `right' border becomes empty.
nuclear@0 553 *
nuclear@0 554 * Use the function @FT_Stroker_Export instead if you want to
nuclear@0 555 * retrieve all borders at once.
nuclear@0 556 */
nuclear@0 557 FT_EXPORT( void )
nuclear@0 558 FT_Stroker_ExportBorder( FT_Stroker stroker,
nuclear@0 559 FT_StrokerBorder border,
nuclear@0 560 FT_Outline* outline );
nuclear@0 561
nuclear@0 562
nuclear@0 563 /**************************************************************
nuclear@0 564 *
nuclear@0 565 * @function:
nuclear@0 566 * FT_Stroker_GetCounts
nuclear@0 567 *
nuclear@0 568 * @description:
nuclear@0 569 * Call this function once you have finished parsing your paths
nuclear@0 570 * with the stroker. It returns the number of points and
nuclear@0 571 * contours necessary to export all points/borders from the stroked
nuclear@0 572 * outline/path.
nuclear@0 573 *
nuclear@0 574 * @input:
nuclear@0 575 * stroker ::
nuclear@0 576 * The target stroker handle.
nuclear@0 577 *
nuclear@0 578 * @output:
nuclear@0 579 * anum_points ::
nuclear@0 580 * The number of points.
nuclear@0 581 *
nuclear@0 582 * anum_contours ::
nuclear@0 583 * The number of contours.
nuclear@0 584 *
nuclear@0 585 * @return:
nuclear@0 586 * FreeType error code. 0~means success.
nuclear@0 587 */
nuclear@0 588 FT_EXPORT( FT_Error )
nuclear@0 589 FT_Stroker_GetCounts( FT_Stroker stroker,
nuclear@0 590 FT_UInt *anum_points,
nuclear@0 591 FT_UInt *anum_contours );
nuclear@0 592
nuclear@0 593
nuclear@0 594 /**************************************************************
nuclear@0 595 *
nuclear@0 596 * @function:
nuclear@0 597 * FT_Stroker_Export
nuclear@0 598 *
nuclear@0 599 * @description:
nuclear@0 600 * Call this function after @FT_Stroker_GetBorderCounts to
nuclear@0 601 * export all borders to your own @FT_Outline structure.
nuclear@0 602 *
nuclear@0 603 * Note that this function appends the border points and
nuclear@0 604 * contours to your outline, but does not try to resize its
nuclear@0 605 * arrays.
nuclear@0 606 *
nuclear@0 607 * @input:
nuclear@0 608 * stroker ::
nuclear@0 609 * The target stroker handle.
nuclear@0 610 *
nuclear@0 611 * outline ::
nuclear@0 612 * The target outline handle.
nuclear@0 613 */
nuclear@0 614 FT_EXPORT( void )
nuclear@0 615 FT_Stroker_Export( FT_Stroker stroker,
nuclear@0 616 FT_Outline* outline );
nuclear@0 617
nuclear@0 618
nuclear@0 619 /**************************************************************
nuclear@0 620 *
nuclear@0 621 * @function:
nuclear@0 622 * FT_Stroker_Done
nuclear@0 623 *
nuclear@0 624 * @description:
nuclear@0 625 * Destroy a stroker object.
nuclear@0 626 *
nuclear@0 627 * @input:
nuclear@0 628 * stroker ::
nuclear@0 629 * A stroker handle. Can be NULL.
nuclear@0 630 */
nuclear@0 631 FT_EXPORT( void )
nuclear@0 632 FT_Stroker_Done( FT_Stroker stroker );
nuclear@0 633
nuclear@0 634
nuclear@0 635 /**************************************************************
nuclear@0 636 *
nuclear@0 637 * @function:
nuclear@0 638 * FT_Glyph_Stroke
nuclear@0 639 *
nuclear@0 640 * @description:
nuclear@0 641 * Stroke a given outline glyph object with a given stroker.
nuclear@0 642 *
nuclear@0 643 * @inout:
nuclear@0 644 * pglyph ::
nuclear@0 645 * Source glyph handle on input, new glyph handle on output.
nuclear@0 646 *
nuclear@0 647 * @input:
nuclear@0 648 * stroker ::
nuclear@0 649 * A stroker handle.
nuclear@0 650 *
nuclear@0 651 * destroy ::
nuclear@0 652 * A Boolean. If~1, the source glyph object is destroyed
nuclear@0 653 * on success.
nuclear@0 654 *
nuclear@0 655 * @return:
nuclear@0 656 * FreeType error code. 0~means success.
nuclear@0 657 *
nuclear@0 658 * @note:
nuclear@0 659 * The source glyph is untouched in case of error.
nuclear@0 660 */
nuclear@0 661 FT_EXPORT( FT_Error )
nuclear@0 662 FT_Glyph_Stroke( FT_Glyph *pglyph,
nuclear@0 663 FT_Stroker stroker,
nuclear@0 664 FT_Bool destroy );
nuclear@0 665
nuclear@0 666
nuclear@0 667 /**************************************************************
nuclear@0 668 *
nuclear@0 669 * @function:
nuclear@0 670 * FT_Glyph_StrokeBorder
nuclear@0 671 *
nuclear@0 672 * @description:
nuclear@0 673 * Stroke a given outline glyph object with a given stroker, but
nuclear@0 674 * only return either its inside or outside border.
nuclear@0 675 *
nuclear@0 676 * @inout:
nuclear@0 677 * pglyph ::
nuclear@0 678 * Source glyph handle on input, new glyph handle on output.
nuclear@0 679 *
nuclear@0 680 * @input:
nuclear@0 681 * stroker ::
nuclear@0 682 * A stroker handle.
nuclear@0 683 *
nuclear@0 684 * inside ::
nuclear@0 685 * A Boolean. If~1, return the inside border, otherwise
nuclear@0 686 * the outside border.
nuclear@0 687 *
nuclear@0 688 * destroy ::
nuclear@0 689 * A Boolean. If~1, the source glyph object is destroyed
nuclear@0 690 * on success.
nuclear@0 691 *
nuclear@0 692 * @return:
nuclear@0 693 * FreeType error code. 0~means success.
nuclear@0 694 *
nuclear@0 695 * @note:
nuclear@0 696 * The source glyph is untouched in case of error.
nuclear@0 697 */
nuclear@0 698 FT_EXPORT( FT_Error )
nuclear@0 699 FT_Glyph_StrokeBorder( FT_Glyph *pglyph,
nuclear@0 700 FT_Stroker stroker,
nuclear@0 701 FT_Bool inside,
nuclear@0 702 FT_Bool destroy );
nuclear@0 703
nuclear@0 704 /* */
nuclear@0 705
nuclear@0 706 FT_END_HEADER
nuclear@0 707
nuclear@0 708 #endif /* __FT_STROKE_H__ */
nuclear@0 709
nuclear@0 710
nuclear@0 711 /* END */
nuclear@0 712
nuclear@0 713
nuclear@0 714 /* Local Variables: */
nuclear@0 715 /* coding: utf-8 */
nuclear@0 716 /* End: */