2 * Copyright © 2009 Red Hat, Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Red Hat Author(s): Behdad Esfahbod
27 #if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
28 #error "Include <hb.h> instead."
34 #include "hb-common.h"
48 * Data type containing a set of virtual methods used for
49 * working on #hb_font_t font objects.
51 * HarfBuzz provides a lightweight default function for each of
52 * the methods in #hb_font_funcs_t. Client programs can implement
53 * their own replacements for the individual font functions, as
54 * needed, and replace the default by calling the setter for a
58 typedef struct hb_font_funcs_t hb_font_funcs_t;
60 HB_EXTERN hb_font_funcs_t *
61 hb_font_funcs_create (void);
63 HB_EXTERN hb_font_funcs_t *
64 hb_font_funcs_get_empty (void);
66 HB_EXTERN hb_font_funcs_t *
67 hb_font_funcs_reference (hb_font_funcs_t *ffuncs);
70 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
73 hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs,
74 hb_user_data_key_t *key,
76 hb_destroy_func_t destroy,
81 hb_font_funcs_get_user_data (const hb_font_funcs_t *ffuncs,
82 hb_user_data_key_t *key);
86 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
89 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs);
96 * @ascender: The height of typographic ascenders.
97 * @descender: The depth of typographic descenders.
98 * @line_gap: The suggested line-spacing gap.
100 * Font-wide extent values, measured in font units.
102 * Note that typically @ascender is positive and @descender
103 * negative, in coordinate systems that grow up.
105 typedef struct hb_font_extents_t {
106 hb_position_t ascender;
107 hb_position_t descender;
108 hb_position_t line_gap;
110 hb_position_t reserved9;
111 hb_position_t reserved8;
112 hb_position_t reserved7;
113 hb_position_t reserved6;
114 hb_position_t reserved5;
115 hb_position_t reserved4;
116 hb_position_t reserved3;
117 hb_position_t reserved2;
118 hb_position_t reserved1;
124 * hb_font_get_font_extents_func_t:
125 * @font: #hb_font_t to work upon
126 * @font_data: @font user data pointer
127 * @extents: (out): The font extents retrieved
128 * @user_data: User data pointer passed by the caller
130 * This method should retrieve the extents for a font.
133 typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data,
134 hb_font_extents_t *extents,
138 * hb_font_get_font_h_extents_func_t:
140 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
142 * This method should retrieve the extents for a font, for horizontal-direction
143 * text segments. Extents must be returned in an #hb_glyph_extents output
147 typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
150 * hb_font_get_font_v_extents_func_t:
152 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
154 * This method should retrieve the extents for a font, for vertical-direction
155 * text segments. Extents must be returned in an #hb_glyph_extents output
159 typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
163 * hb_font_get_nominal_glyph_func_t:
164 * @font: #hb_font_t to work upon
165 * @font_data: @font user data pointer
166 * @unicode: The Unicode code point to query
167 * @glyph: (out): The glyph ID retrieved
168 * @user_data: User data pointer passed by the caller
170 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
172 * This method should retrieve the nominal glyph ID for a specified Unicode code
173 * point. Glyph IDs must be returned in a #hb_codepoint_t output parameter.
175 * Return value: `true` if data found, `false` otherwise
178 typedef hb_bool_t (*hb_font_get_nominal_glyph_func_t) (hb_font_t *font, void *font_data,
179 hb_codepoint_t unicode,
180 hb_codepoint_t *glyph,
184 * hb_font_get_variation_glyph_func_t:
185 * @font: #hb_font_t to work upon
186 * @font_data: @font user data pointer
187 * @unicode: The Unicode code point to query
188 * @variation_selector: The variation-selector code point to query
189 * @glyph: (out): The glyph ID retrieved
190 * @user_data: User data pointer passed by the caller
192 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
194 * This method should retrieve the glyph ID for a specified Unicode code point
195 * followed by a specified Variation Selector code point. Glyph IDs must be
196 * returned in a #hb_codepoint_t output parameter.
198 * Return value: `true` if data found, `false` otherwise
201 typedef hb_bool_t (*hb_font_get_variation_glyph_func_t) (hb_font_t *font, void *font_data,
202 hb_codepoint_t unicode, hb_codepoint_t variation_selector,
203 hb_codepoint_t *glyph,
208 * hb_font_get_nominal_glyphs_func_t:
209 * @font: #hb_font_t to work upon
210 * @font_data: @font user data pointer
211 * @count: number of code points to query
212 * @first_unicode: The first Unicode code point to query
213 * @unicode_stride: The stride between successive code points
214 * @first_glyph: (out): The first glyph ID retrieved
215 * @glyph_stride: The stride between successive glyph IDs
216 * @user_data: User data pointer passed by the caller
218 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
220 * This method should retrieve the nominal glyph IDs for a sequence of
221 * Unicode code points. Glyph IDs must be returned in a #hb_codepoint_t
224 * Return value: the number of code points processed
227 typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void *font_data,
229 const hb_codepoint_t *first_unicode,
230 unsigned int unicode_stride,
231 hb_codepoint_t *first_glyph,
232 unsigned int glyph_stride,
236 * hb_font_get_glyph_advance_func_t:
237 * @font: #hb_font_t to work upon
238 * @font_data: @font user data pointer
239 * @glyph: The glyph ID to query
240 * @user_data: User data pointer passed by the caller
242 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
244 * This method should retrieve the advance for a specified glyph. The
245 * method must return an #hb_position_t.
247 * Return value: The advance of @glyph within @font
250 typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
251 hb_codepoint_t glyph,
255 * hb_font_get_glyph_h_advance_func_t:
257 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
259 * This method should retrieve the advance for a specified glyph, in
260 * horizontal-direction text segments. Advances must be returned in
261 * an #hb_position_t output parameter.
264 typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
267 * hb_font_get_glyph_v_advance_func_t:
269 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
271 * This method should retrieve the advance for a specified glyph, in
272 * vertical-direction text segments. Advances must be returned in
273 * an #hb_position_t output parameter.
276 typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
279 * hb_font_get_glyph_advances_func_t:
280 * @font: #hb_font_t to work upon
281 * @font_data: @font user data pointer
282 * @count: The number of glyph IDs in the sequence queried
283 * @first_glyph: The first glyph ID to query
284 * @glyph_stride: The stride between successive glyph IDs
285 * @first_advance: (out): The first advance retrieved
286 * @advance_stride: The stride between successive advances
287 * @user_data: User data pointer passed by the caller
289 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
291 * This method should retrieve the advances for a sequence of glyphs.
294 typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void* font_data,
296 const hb_codepoint_t *first_glyph,
297 unsigned glyph_stride,
298 hb_position_t *first_advance,
299 unsigned advance_stride,
303 * hb_font_get_glyph_h_advances_func_t:
305 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
307 * This method should retrieve the advances for a sequence of glyphs, in
308 * horizontal-direction text segments.
311 typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t;
314 * hb_font_get_glyph_v_advances_func_t:
316 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
318 * This method should retrieve the advances for a sequence of glyphs, in
319 * vertical-direction text segments.
322 typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t;
325 * hb_font_get_glyph_origin_func_t:
326 * @font: #hb_font_t to work upon
327 * @font_data: @font user data pointer
328 * @glyph: The glyph ID to query
329 * @x: (out): The X coordinate of the origin
330 * @y: (out): The Y coordinate of the origin
331 * @user_data: User data pointer passed by the caller
333 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
335 * This method should retrieve the (X,Y) coordinates (in font units) of the
336 * origin for a glyph. Each coordinate must be returned in an #hb_position_t
339 * Return value: `true` if data found, `false` otherwise
342 typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
343 hb_codepoint_t glyph,
344 hb_position_t *x, hb_position_t *y,
348 * hb_font_get_glyph_h_origin_func_t:
350 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
352 * This method should retrieve the (X,Y) coordinates (in font units) of the
353 * origin for a glyph, for horizontal-direction text segments. Each
354 * coordinate must be returned in an #hb_position_t output parameter.
357 typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
360 * hb_font_get_glyph_v_origin_func_t:
362 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
364 * This method should retrieve the (X,Y) coordinates (in font units) of the
365 * origin for a glyph, for vertical-direction text segments. Each coordinate
366 * must be returned in an #hb_position_t output parameter.
369 typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
372 * hb_font_get_glyph_kerning_func_t:
373 * @font: #hb_font_t to work upon
374 * @font_data: @font user data pointer
375 * @first_glyph: The glyph ID of the first glyph in the glyph pair
376 * @second_glyph: The glyph ID of the second glyph in the glyph pair
377 * @user_data: User data pointer passed by the caller
379 * This method should retrieve the kerning-adjustment value for a glyph-pair in
380 * the specified font, for horizontal text segments.
383 typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
384 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
387 * hb_font_get_glyph_h_kerning_func_t:
389 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
391 * This method should retrieve the kerning-adjustment value for a glyph-pair in
392 * the specified font, for horizontal text segments.
395 typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
399 * hb_font_get_glyph_extents_func_t:
400 * @font: #hb_font_t to work upon
401 * @font_data: @font user data pointer
402 * @glyph: The glyph ID to query
403 * @extents: (out): The #hb_glyph_extents_t retrieved
404 * @user_data: User data pointer passed by the caller
406 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
408 * This method should retrieve the extents for a specified glyph. Extents must be
409 * returned in an #hb_glyph_extents output parameter.
411 * Return value: `true` if data found, `false` otherwise
414 typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
415 hb_codepoint_t glyph,
416 hb_glyph_extents_t *extents,
420 * hb_font_get_glyph_contour_point_func_t:
421 * @font: #hb_font_t to work upon
422 * @font_data: @font user data pointer
423 * @glyph: The glyph ID to query
424 * @point_index: The contour-point index to query
425 * @x: (out): The X value retrieved for the contour point
426 * @y: (out): The Y value retrieved for the contour point
427 * @user_data: User data pointer passed by the caller
429 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
431 * This method should retrieve the (X,Y) coordinates (in font units) for a
432 * specified contour point in a glyph. Each coordinate must be returned as
433 * an #hb_position_t output parameter.
435 * Return value: `true` if data found, `false` otherwise
438 typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
439 hb_codepoint_t glyph, unsigned int point_index,
440 hb_position_t *x, hb_position_t *y,
445 * hb_font_get_glyph_name_func_t:
446 * @font: #hb_font_t to work upon
447 * @font_data: @font user data pointer
448 * @glyph: The glyph ID to query
449 * @name: (out) (array length=size): Name string retrieved for the glyph ID
450 * @size: Length of the glyph-name string retrieved
451 * @user_data: User data pointer passed by the caller
453 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
455 * This method should retrieve the glyph name that corresponds to a
456 * glyph ID. The name should be returned in a string output parameter.
458 * Return value: `true` if data found, `false` otherwise
461 typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data,
462 hb_codepoint_t glyph,
463 char *name, unsigned int size,
467 * hb_font_get_glyph_from_name_func_t:
468 * @font: #hb_font_t to work upon
469 * @font_data: @font user data pointer
470 * @name: (array length=len): The name string to query
471 * @len: The length of the name queried
472 * @glyph: (out): The glyph ID retrieved
473 * @user_data: User data pointer passed by the caller
475 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
477 * This method should retrieve the glyph ID that corresponds to a glyph-name
480 * Return value: `true` if data found, `false` otherwise
483 typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data,
484 const char *name, int len, /* -1 means nul-terminated */
485 hb_codepoint_t *glyph,
489 * hb_font_draw_glyph_func_t:
490 * @font: #hb_font_t to work upon
491 * @font_data: @font user data pointer
492 * @glyph: The glyph ID to query
493 * @draw_funcs: The draw functions to send the shape data to
494 * @draw_data: The data accompanying the draw functions
495 * @user_data: User data pointer passed by the caller
497 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
502 typedef void (*hb_font_draw_glyph_func_t) (hb_font_t *font, void *font_data,
503 hb_codepoint_t glyph,
504 hb_draw_funcs_t *draw_funcs, void *draw_data,
508 * hb_font_paint_glyph_func_t:
509 * @font: #hb_font_t to work upon
510 * @font_data: @font user data pointer
511 * @glyph: The glyph ID to query
512 * @paint_funcs: The paint functions to use
513 * @paint_data: The data accompanying the paint functions
514 * @palette_index: The color palette to use
515 * @foreground: The foreground color
516 * @user_data: User data pointer passed by the caller
518 * A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
522 typedef void (*hb_font_paint_glyph_func_t) (hb_font_t *font, void *font_data,
523 hb_codepoint_t glyph,
524 hb_paint_funcs_t *paint_funcs, void *paint_data,
525 unsigned int palette_index,
526 hb_color_t foreground,
532 * hb_font_funcs_set_font_h_extents_func:
533 * @ffuncs: A font-function structure
534 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
535 * @user_data: Data to pass to @func
536 * @destroy: (nullable): The function to call when @user_data is not needed anymore
538 * Sets the implementation function for #hb_font_get_font_h_extents_func_t.
543 hb_font_funcs_set_font_h_extents_func (hb_font_funcs_t *ffuncs,
544 hb_font_get_font_h_extents_func_t func,
545 void *user_data, hb_destroy_func_t destroy);
548 * hb_font_funcs_set_font_v_extents_func:
549 * @ffuncs: A font-function structure
550 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
551 * @user_data: Data to pass to @func
552 * @destroy: (nullable): The function to call when @user_data is not needed anymore
554 * Sets the implementation function for #hb_font_get_font_v_extents_func_t.
559 hb_font_funcs_set_font_v_extents_func (hb_font_funcs_t *ffuncs,
560 hb_font_get_font_v_extents_func_t func,
561 void *user_data, hb_destroy_func_t destroy);
564 * hb_font_funcs_set_nominal_glyph_func:
565 * @ffuncs: A font-function structure
566 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
567 * @user_data: Data to pass to @func
568 * @destroy: (nullable): The function to call when @user_data is not needed anymore
570 * Sets the implementation function for #hb_font_get_nominal_glyph_func_t.
575 hb_font_funcs_set_nominal_glyph_func (hb_font_funcs_t *ffuncs,
576 hb_font_get_nominal_glyph_func_t func,
577 void *user_data, hb_destroy_func_t destroy);
580 * hb_font_funcs_set_nominal_glyphs_func:
581 * @ffuncs: A font-function structure
582 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
583 * @user_data: Data to pass to @func
584 * @destroy: (nullable): The function to call when @user_data is not needed anymore
586 * Sets the implementation function for #hb_font_get_nominal_glyphs_func_t.
591 hb_font_funcs_set_nominal_glyphs_func (hb_font_funcs_t *ffuncs,
592 hb_font_get_nominal_glyphs_func_t func,
593 void *user_data, hb_destroy_func_t destroy);
596 * hb_font_funcs_set_variation_glyph_func:
597 * @ffuncs: A font-function structure
598 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
599 * @user_data: Data to pass to @func
600 * @destroy: (nullable): The function to call when @user_data is not needed anymore
602 * Sets the implementation function for #hb_font_get_variation_glyph_func_t.
607 hb_font_funcs_set_variation_glyph_func (hb_font_funcs_t *ffuncs,
608 hb_font_get_variation_glyph_func_t func,
609 void *user_data, hb_destroy_func_t destroy);
612 * hb_font_funcs_set_glyph_h_advance_func:
613 * @ffuncs: A font-function structure
614 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
615 * @user_data: Data to pass to @func
616 * @destroy: (nullable): The function to call when @user_data is not needed anymore
618 * Sets the implementation function for #hb_font_get_glyph_h_advance_func_t.
623 hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs,
624 hb_font_get_glyph_h_advance_func_t func,
625 void *user_data, hb_destroy_func_t destroy);
628 * hb_font_funcs_set_glyph_v_advance_func:
629 * @ffuncs: A font-function structure
630 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
631 * @user_data: Data to pass to @func
632 * @destroy: (nullable): The function to call when @user_data is not needed anymore
634 * Sets the implementation function for #hb_font_get_glyph_v_advance_func_t.
639 hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs,
640 hb_font_get_glyph_v_advance_func_t func,
641 void *user_data, hb_destroy_func_t destroy);
644 * hb_font_funcs_set_glyph_h_advances_func:
645 * @ffuncs: A font-function structure
646 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
647 * @user_data: Data to pass to @func
648 * @destroy: (nullable): The function to call when @user_data is not needed anymore
650 * Sets the implementation function for #hb_font_get_glyph_h_advances_func_t.
655 hb_font_funcs_set_glyph_h_advances_func (hb_font_funcs_t *ffuncs,
656 hb_font_get_glyph_h_advances_func_t func,
657 void *user_data, hb_destroy_func_t destroy);
660 * hb_font_funcs_set_glyph_v_advances_func:
661 * @ffuncs: A font-function structure
662 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
663 * @user_data: Data to pass to @func
664 * @destroy: (nullable): The function to call when @user_data is not needed anymore
666 * Sets the implementation function for #hb_font_get_glyph_v_advances_func_t.
671 hb_font_funcs_set_glyph_v_advances_func (hb_font_funcs_t *ffuncs,
672 hb_font_get_glyph_v_advances_func_t func,
673 void *user_data, hb_destroy_func_t destroy);
676 * hb_font_funcs_set_glyph_h_origin_func:
677 * @ffuncs: A font-function structure
678 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
679 * @user_data: Data to pass to @func
680 * @destroy: (nullable): The function to call when @user_data is not needed anymore
682 * Sets the implementation function for #hb_font_get_glyph_h_origin_func_t.
687 hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs,
688 hb_font_get_glyph_h_origin_func_t func,
689 void *user_data, hb_destroy_func_t destroy);
692 * hb_font_funcs_set_glyph_v_origin_func:
693 * @ffuncs: A font-function structure
694 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
695 * @user_data: Data to pass to @func
696 * @destroy: (nullable): The function to call when @user_data is not needed anymore
698 * Sets the implementation function for #hb_font_get_glyph_v_origin_func_t.
703 hb_font_funcs_set_glyph_v_origin_func (hb_font_funcs_t *ffuncs,
704 hb_font_get_glyph_v_origin_func_t func,
705 void *user_data, hb_destroy_func_t destroy);
708 * hb_font_funcs_set_glyph_h_kerning_func:
709 * @ffuncs: A font-function structure
710 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
711 * @user_data: Data to pass to @func
712 * @destroy: (nullable): The function to call when @user_data is not needed anymore
714 * Sets the implementation function for #hb_font_get_glyph_h_kerning_func_t.
719 hb_font_funcs_set_glyph_h_kerning_func (hb_font_funcs_t *ffuncs,
720 hb_font_get_glyph_h_kerning_func_t func,
721 void *user_data, hb_destroy_func_t destroy);
724 * hb_font_funcs_set_glyph_extents_func:
725 * @ffuncs: A font-function structure
726 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
727 * @user_data: Data to pass to @func
728 * @destroy: (nullable): The function to call when @user_data is not needed anymore
730 * Sets the implementation function for #hb_font_get_glyph_extents_func_t.
735 hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
736 hb_font_get_glyph_extents_func_t func,
737 void *user_data, hb_destroy_func_t destroy);
740 * hb_font_funcs_set_glyph_contour_point_func:
741 * @ffuncs: A font-function structure
742 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
743 * @user_data: Data to pass to @func
744 * @destroy: (nullable): The function to call when @user_data is not needed anymore
746 * Sets the implementation function for #hb_font_get_glyph_contour_point_func_t.
751 hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs,
752 hb_font_get_glyph_contour_point_func_t func,
753 void *user_data, hb_destroy_func_t destroy);
756 * hb_font_funcs_set_glyph_name_func:
757 * @ffuncs: A font-function structure
758 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
759 * @user_data: Data to pass to @func
760 * @destroy: (nullable): The function to call when @user_data is not needed anymore
762 * Sets the implementation function for #hb_font_get_glyph_name_func_t.
767 hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs,
768 hb_font_get_glyph_name_func_t func,
769 void *user_data, hb_destroy_func_t destroy);
772 * hb_font_funcs_set_glyph_from_name_func:
773 * @ffuncs: A font-function structure
774 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
775 * @user_data: Data to pass to @func
776 * @destroy: (nullable): The function to call when @user_data is not needed anymore
778 * Sets the implementation function for #hb_font_get_glyph_from_name_func_t.
783 hb_font_funcs_set_glyph_from_name_func (hb_font_funcs_t *ffuncs,
784 hb_font_get_glyph_from_name_func_t func,
785 void *user_data, hb_destroy_func_t destroy);
788 * hb_font_funcs_set_draw_glyph_func:
789 * @ffuncs: A font-function structure
790 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
791 * @user_data: Data to pass to @func
792 * @destroy: (nullable): The function to call when @user_data is not needed anymore
794 * Sets the implementation function for #hb_font_draw_glyph_func_t.
799 hb_font_funcs_set_draw_glyph_func (hb_font_funcs_t *ffuncs,
800 hb_font_draw_glyph_func_t func,
801 void *user_data, hb_destroy_func_t destroy);
804 * hb_font_funcs_set_paint_glyph_func:
805 * @ffuncs: A font-function structure
806 * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
807 * @user_data: Data to pass to @func
808 * @destroy: (nullable): The function to call when @user_data is no longer needed
810 * Sets the implementation function for #hb_font_paint_glyph_func_t.
815 hb_font_funcs_set_paint_glyph_func (hb_font_funcs_t *ffuncs,
816 hb_font_paint_glyph_func_t func,
817 void *user_data, hb_destroy_func_t destroy);
822 hb_font_get_h_extents (hb_font_t *font,
823 hb_font_extents_t *extents);
825 hb_font_get_v_extents (hb_font_t *font,
826 hb_font_extents_t *extents);
829 hb_font_get_nominal_glyph (hb_font_t *font,
830 hb_codepoint_t unicode,
831 hb_codepoint_t *glyph);
833 hb_font_get_variation_glyph (hb_font_t *font,
834 hb_codepoint_t unicode, hb_codepoint_t variation_selector,
835 hb_codepoint_t *glyph);
837 HB_EXTERN unsigned int
838 hb_font_get_nominal_glyphs (hb_font_t *font,
840 const hb_codepoint_t *first_unicode,
841 unsigned int unicode_stride,
842 hb_codepoint_t *first_glyph,
843 unsigned int glyph_stride);
845 HB_EXTERN hb_position_t
846 hb_font_get_glyph_h_advance (hb_font_t *font,
847 hb_codepoint_t glyph);
848 HB_EXTERN hb_position_t
849 hb_font_get_glyph_v_advance (hb_font_t *font,
850 hb_codepoint_t glyph);
853 hb_font_get_glyph_h_advances (hb_font_t* font,
855 const hb_codepoint_t *first_glyph,
856 unsigned glyph_stride,
857 hb_position_t *first_advance,
858 unsigned advance_stride);
860 hb_font_get_glyph_v_advances (hb_font_t* font,
862 const hb_codepoint_t *first_glyph,
863 unsigned glyph_stride,
864 hb_position_t *first_advance,
865 unsigned advance_stride);
868 hb_font_get_glyph_h_origin (hb_font_t *font,
869 hb_codepoint_t glyph,
870 hb_position_t *x, hb_position_t *y);
872 hb_font_get_glyph_v_origin (hb_font_t *font,
873 hb_codepoint_t glyph,
874 hb_position_t *x, hb_position_t *y);
876 HB_EXTERN hb_position_t
877 hb_font_get_glyph_h_kerning (hb_font_t *font,
878 hb_codepoint_t left_glyph, hb_codepoint_t right_glyph);
881 hb_font_get_glyph_extents (hb_font_t *font,
882 hb_codepoint_t glyph,
883 hb_glyph_extents_t *extents);
886 hb_font_get_glyph_contour_point (hb_font_t *font,
887 hb_codepoint_t glyph, unsigned int point_index,
888 hb_position_t *x, hb_position_t *y);
891 hb_font_get_glyph_name (hb_font_t *font,
892 hb_codepoint_t glyph,
893 char *name, unsigned int size);
895 hb_font_get_glyph_from_name (hb_font_t *font,
896 const char *name, int len, /* -1 means nul-terminated */
897 hb_codepoint_t *glyph);
900 hb_font_draw_glyph (hb_font_t *font,
901 hb_codepoint_t glyph,
902 hb_draw_funcs_t *dfuncs, void *draw_data);
905 hb_font_paint_glyph (hb_font_t *font,
906 hb_codepoint_t glyph,
907 hb_paint_funcs_t *pfuncs, void *paint_data,
908 unsigned int palette_index,
909 hb_color_t foreground);
911 /* high-level funcs, with fallback */
913 /* Calls either hb_font_get_nominal_glyph() if variation_selector is 0,
914 * otherwise calls hb_font_get_variation_glyph(). */
916 hb_font_get_glyph (hb_font_t *font,
917 hb_codepoint_t unicode, hb_codepoint_t variation_selector,
918 hb_codepoint_t *glyph);
921 hb_font_get_extents_for_direction (hb_font_t *font,
922 hb_direction_t direction,
923 hb_font_extents_t *extents);
925 hb_font_get_glyph_advance_for_direction (hb_font_t *font,
926 hb_codepoint_t glyph,
927 hb_direction_t direction,
928 hb_position_t *x, hb_position_t *y);
930 hb_font_get_glyph_advances_for_direction (hb_font_t* font,
931 hb_direction_t direction,
933 const hb_codepoint_t *first_glyph,
934 unsigned glyph_stride,
935 hb_position_t *first_advance,
936 unsigned advance_stride);
938 hb_font_get_glyph_origin_for_direction (hb_font_t *font,
939 hb_codepoint_t glyph,
940 hb_direction_t direction,
941 hb_position_t *x, hb_position_t *y);
943 hb_font_add_glyph_origin_for_direction (hb_font_t *font,
944 hb_codepoint_t glyph,
945 hb_direction_t direction,
946 hb_position_t *x, hb_position_t *y);
948 hb_font_subtract_glyph_origin_for_direction (hb_font_t *font,
949 hb_codepoint_t glyph,
950 hb_direction_t direction,
951 hb_position_t *x, hb_position_t *y);
954 hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
955 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
956 hb_direction_t direction,
957 hb_position_t *x, hb_position_t *y);
960 hb_font_get_glyph_extents_for_origin (hb_font_t *font,
961 hb_codepoint_t glyph,
962 hb_direction_t direction,
963 hb_glyph_extents_t *extents);
966 hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
967 hb_codepoint_t glyph, unsigned int point_index,
968 hb_direction_t direction,
969 hb_position_t *x, hb_position_t *y);
971 /* Generates gidDDD if glyph has no name. */
973 hb_font_glyph_to_string (hb_font_t *font,
974 hb_codepoint_t glyph,
975 char *s, unsigned int size);
976 /* Parses gidDDD and uniUUUU strings automatically. */
978 hb_font_glyph_from_string (hb_font_t *font,
979 const char *s, int len, /* -1 means nul-terminated */
980 hb_codepoint_t *glyph);
987 /* Fonts are very light-weight objects */
989 HB_EXTERN hb_font_t *
990 hb_font_create (hb_face_t *face);
992 HB_EXTERN hb_font_t *
993 hb_font_create_sub_font (hb_font_t *parent);
995 HB_EXTERN hb_font_t *
996 hb_font_get_empty (void);
998 HB_EXTERN hb_font_t *
999 hb_font_reference (hb_font_t *font);
1002 hb_font_destroy (hb_font_t *font);
1005 hb_font_set_user_data (hb_font_t *font,
1006 hb_user_data_key_t *key,
1008 hb_destroy_func_t destroy,
1013 hb_font_get_user_data (const hb_font_t *font,
1014 hb_user_data_key_t *key);
1017 hb_font_make_immutable (hb_font_t *font);
1020 hb_font_is_immutable (hb_font_t *font);
1022 HB_EXTERN unsigned int
1023 hb_font_get_serial (hb_font_t *font);
1026 hb_font_changed (hb_font_t *font);
1029 hb_font_set_parent (hb_font_t *font,
1032 HB_EXTERN hb_font_t *
1033 hb_font_get_parent (hb_font_t *font);
1036 hb_font_set_face (hb_font_t *font,
1039 HB_EXTERN hb_face_t *
1040 hb_font_get_face (hb_font_t *font);
1044 hb_font_set_funcs (hb_font_t *font,
1045 hb_font_funcs_t *klass,
1047 hb_destroy_func_t destroy);
1049 /* Be *very* careful with this function! */
1051 hb_font_set_funcs_data (hb_font_t *font,
1053 hb_destroy_func_t destroy);
1057 hb_font_set_scale (hb_font_t *font,
1062 hb_font_get_scale (hb_font_t *font,
1067 * A zero value means "no hinting in that direction"
1070 hb_font_set_ppem (hb_font_t *font,
1071 unsigned int x_ppem,
1072 unsigned int y_ppem);
1075 hb_font_get_ppem (hb_font_t *font,
1076 unsigned int *x_ppem,
1077 unsigned int *y_ppem);
1080 * Point size per EM. Used for optical-sizing in CoreText.
1081 * A value of zero means "not set".
1084 hb_font_set_ptem (hb_font_t *font, float ptem);
1087 hb_font_get_ptem (hb_font_t *font);
1090 hb_font_set_synthetic_bold (hb_font_t *font,
1091 float x_embolden, float y_embolden,
1092 hb_bool_t in_place);
1095 hb_font_get_synthetic_bold (hb_font_t *font,
1096 float *x_embolden, float *y_embolden,
1097 hb_bool_t *in_place);
1100 hb_font_set_synthetic_slant (hb_font_t *font, float slant);
1103 hb_font_get_synthetic_slant (hb_font_t *font);
1106 hb_font_set_variations (hb_font_t *font,
1107 const hb_variation_t *variations,
1108 unsigned int variations_length);
1111 hb_font_set_variation (hb_font_t *font,
1116 hb_font_set_var_coords_design (hb_font_t *font,
1117 const float *coords,
1118 unsigned int coords_length);
1120 HB_EXTERN const float *
1121 hb_font_get_var_coords_design (hb_font_t *font,
1122 unsigned int *length);
1125 hb_font_set_var_coords_normalized (hb_font_t *font,
1126 const int *coords, /* 2.14 normalized */
1127 unsigned int coords_length);
1129 HB_EXTERN const int *
1130 hb_font_get_var_coords_normalized (hb_font_t *font,
1131 unsigned int *length);
1134 * HB_FONT_NO_VAR_NAMED_INSTANCE:
1136 * Constant signifying that a font does not have any
1137 * named-instance index set. This is the default of
1142 #define HB_FONT_NO_VAR_NAMED_INSTANCE 0xFFFFFFFF
1145 hb_font_set_var_named_instance (hb_font_t *font,
1146 unsigned int instance_index);
1148 HB_EXTERN unsigned int
1149 hb_font_get_var_named_instance (hb_font_t *font);
1153 #endif /* HB_FONT_H */