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 #include "hb-private.hh"
29 #include "hb-font-private.hh"
30 #include "hb-blob-private.hh"
31 #include "hb-open-file-private.hh"
33 #include "hb-ot-layout-private.hh"
45 hb_font_get_glyph_nil (hb_font_t *font HB_UNUSED,
46 hb_face_t *face HB_UNUSED,
47 const void *user_data HB_UNUSED,
48 hb_codepoint_t unicode HB_UNUSED,
49 hb_codepoint_t variation_selector HB_UNUSED)
53 hb_font_get_glyph_advance_nil (hb_font_t *font HB_UNUSED,
54 hb_face_t *face HB_UNUSED,
55 const void *user_data HB_UNUSED,
56 hb_codepoint_t glyph HB_UNUSED,
57 hb_position_t *x_advance HB_UNUSED,
58 hb_position_t *y_advance HB_UNUSED)
62 hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED,
63 hb_face_t *face HB_UNUSED,
64 const void *user_data HB_UNUSED,
65 hb_codepoint_t glyph HB_UNUSED,
66 hb_glyph_extents_t *extents HB_UNUSED)
70 hb_font_get_contour_point_nil (hb_font_t *font HB_UNUSED,
71 hb_face_t *face HB_UNUSED,
72 const void *user_data HB_UNUSED,
73 unsigned int point_index HB_UNUSED,
74 hb_codepoint_t glyph HB_UNUSED,
75 hb_position_t *x HB_UNUSED,
76 hb_position_t *y HB_UNUSED)
80 hb_font_get_kerning_nil (hb_font_t *font HB_UNUSED,
81 hb_face_t *face HB_UNUSED,
82 const void *user_data HB_UNUSED,
83 hb_codepoint_t first_glyph HB_UNUSED,
84 hb_codepoint_t second_glyph HB_UNUSED)
87 hb_font_funcs_t _hb_font_funcs_nil = {
88 HB_REFERENCE_COUNT_INVALID, /* ref_count */
91 hb_font_get_glyph_nil,
92 hb_font_get_glyph_advance_nil,
93 hb_font_get_glyph_extents_nil,
94 hb_font_get_contour_point_nil,
95 hb_font_get_kerning_nil
100 hb_font_funcs_create (void)
102 hb_font_funcs_t *ffuncs;
104 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
105 return &_hb_font_funcs_nil;
107 ffuncs->v = _hb_font_funcs_nil.v;
113 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
115 HB_OBJECT_DO_REFERENCE (ffuncs);
119 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
121 HB_OBJECT_DO_DESTROY (ffuncs);
127 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
129 hb_font_funcs_t *ffuncs;
131 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
132 return &_hb_font_funcs_nil;
134 ffuncs->v = other_ffuncs->v;
140 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
142 if (HB_OBJECT_IS_INERT (ffuncs))
145 ffuncs->immutable = TRUE;
149 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
151 return ffuncs->immutable;
156 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
157 hb_font_get_glyph_func_t glyph_func)
159 if (ffuncs->immutable)
162 ffuncs->v.get_glyph = glyph_func ? glyph_func : hb_font_get_glyph_nil;
166 hb_font_funcs_set_glyph_advance_func (hb_font_funcs_t *ffuncs,
167 hb_font_get_glyph_advance_func_t glyph_advance_func)
169 if (ffuncs->immutable)
172 ffuncs->v.get_glyph_advance = glyph_advance_func ? glyph_advance_func : hb_font_get_glyph_advance_nil;
176 hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
177 hb_font_get_glyph_extents_func_t glyph_extents_func)
179 if (ffuncs->immutable)
182 ffuncs->v.get_glyph_extents = glyph_extents_func ? glyph_extents_func : hb_font_get_glyph_extents_nil;
186 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
187 hb_font_get_contour_point_func_t contour_point_func)
189 if (ffuncs->immutable)
192 ffuncs->v.get_contour_point = contour_point_func ? contour_point_func : hb_font_get_contour_point_nil;
196 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
197 hb_font_get_kerning_func_t kerning_func)
199 if (ffuncs->immutable)
202 ffuncs->v.get_kerning = kerning_func ? kerning_func : hb_font_get_kerning_nil;
206 hb_font_get_glyph_func_t
207 hb_font_funcs_get_glyph_func (hb_font_funcs_t *ffuncs)
209 return ffuncs->v.get_glyph;
212 hb_font_get_glyph_advance_func_t
213 hb_font_funcs_get_glyph_advance_func (hb_font_funcs_t *ffuncs)
215 return ffuncs->v.get_glyph_advance;
218 hb_font_get_glyph_extents_func_t
219 hb_font_funcs_get_glyph_extents_func (hb_font_funcs_t *ffuncs)
221 return ffuncs->v.get_glyph_extents;
224 hb_font_get_contour_point_func_t
225 hb_font_funcs_get_contour_point_func (hb_font_funcs_t *ffuncs)
227 return ffuncs->v.get_contour_point;
230 hb_font_get_kerning_func_t
231 hb_font_funcs_get_kerning_func (hb_font_funcs_t *ffuncs)
233 return ffuncs->v.get_kerning;
239 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
240 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
242 return font->klass->v.get_glyph (font, face, font->user_data,
243 unicode, variation_selector);
247 hb_font_get_glyph_advance (hb_font_t *font, hb_face_t *face,
248 hb_codepoint_t glyph,
249 hb_position_t *x_advance, hb_position_t *y_advance)
251 *x_advance = *y_advance = 0;
252 return font->klass->v.get_glyph_advance (font, face, font->user_data,
253 glyph, x_advance, y_advance);
257 hb_font_get_glyph_extents (hb_font_t *font, hb_face_t *face,
258 hb_codepoint_t glyph, hb_glyph_extents_t *extents)
260 memset (extents, 0, sizeof (*extents));
261 return font->klass->v.get_glyph_extents (font, face, font->user_data,
266 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
267 unsigned int point_index,
268 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
271 return font->klass->v.get_contour_point (font, face, font->user_data,
277 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
278 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
280 return font->klass->v.get_kerning (font, face, font->user_data,
281 first_glyph, second_glyph);
289 static hb_face_t _hb_face_nil = {
290 HB_REFERENCE_COUNT_INVALID, /* ref_count */
292 NULL, /* get_table */
293 NULL, /* user_data */
296 NULL, /* head_blob */
297 NULL, /* head_table */
304 hb_face_create_for_tables (hb_get_table_func_t get_table,
306 hb_destroy_func_t destroy)
310 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
313 return &_hb_face_nil;
316 face->get_table = get_table;
317 face->user_data = user_data;
318 face->destroy = destroy;
320 face->ot_layout = _hb_ot_layout_new (face);
322 face->head_blob = Sanitizer<head>::sanitize (hb_face_reference_table (face, HB_OT_TAG_head));
323 face->head_table = Sanitizer<head>::lock_instance (face->head_blob);
329 typedef struct _hb_face_for_data_closure_t {
332 } hb_face_for_data_closure_t;
334 static hb_face_for_data_closure_t *
335 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
337 hb_face_for_data_closure_t *closure;
339 closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
340 if (unlikely (!closure))
343 closure->blob = blob;
344 closure->index = index;
350 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
352 hb_blob_destroy (closure->blob);
357 _hb_face_for_data_get_table (hb_tag_t tag, void *user_data)
359 hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
361 const OpenTypeFontFile &ot_file = *Sanitizer<OpenTypeFontFile>::lock_instance (data->blob);
362 const OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
364 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
366 hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
368 hb_blob_unlock (data->blob);
374 hb_face_create_for_data (hb_blob_t *blob,
377 hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
379 if (unlikely (!closure))
380 return &_hb_face_nil;
382 return hb_face_create_for_tables (_hb_face_for_data_get_table,
384 (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
389 hb_face_reference (hb_face_t *face)
391 HB_OBJECT_DO_REFERENCE (face);
395 hb_face_destroy (hb_face_t *face)
397 HB_OBJECT_DO_DESTROY (face);
399 _hb_ot_layout_free (face->ot_layout);
401 hb_blob_unlock (face->head_blob);
402 hb_blob_destroy (face->head_blob);
405 face->destroy (face->user_data);
411 hb_face_reference_table (hb_face_t *face,
416 if (unlikely (!face || !face->get_table))
417 return &_hb_blob_nil;
419 blob = face->get_table (tag, face->user_data);
420 if (unlikely (!blob))
421 blob = hb_blob_create_empty();
427 hb_face_get_upem (hb_face_t *face)
429 return (face->head_table ? face->head_table : &Null(head))->get_upem ();
437 static hb_font_t _hb_font_nil = {
438 HB_REFERENCE_COUNT_INVALID, /* ref_count */
447 NULL, /* user_data */
452 hb_font_create (void)
456 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
457 return &_hb_font_nil;
459 font->klass = &_hb_font_funcs_nil;
465 hb_font_reference (hb_font_t *font)
467 HB_OBJECT_DO_REFERENCE (font);
471 hb_font_destroy (hb_font_t *font)
473 HB_OBJECT_DO_DESTROY (font);
475 hb_font_funcs_destroy (font->klass);
477 font->destroy (font->user_data);
483 hb_font_set_funcs (hb_font_t *font,
484 hb_font_funcs_t *klass,
486 hb_destroy_func_t destroy)
488 if (HB_OBJECT_IS_INERT (font))
492 font->destroy (font->user_data);
495 klass = &_hb_font_funcs_nil;
497 hb_font_funcs_reference (klass);
498 hb_font_funcs_destroy (font->klass);
500 font->user_data = user_data;
501 font->destroy = destroy;
505 hb_font_unset_funcs (hb_font_t *font,
506 hb_font_funcs_t **klass,
508 hb_destroy_func_t *destroy)
510 /* None of the input arguments can be NULL. */
512 *klass = font->klass;
513 *user_data = font->user_data;
514 *destroy = font->destroy;
516 if (HB_OBJECT_IS_INERT (font))
520 font->user_data = NULL;
521 font->destroy = NULL;
525 hb_font_set_scale (hb_font_t *font,
529 if (HB_OBJECT_IS_INERT (font))
532 font->x_scale = x_scale;
533 font->y_scale = y_scale;
537 hb_font_get_scale (hb_font_t *font,
541 if (x_scale) *x_scale = font->x_scale;
542 if (y_scale) *y_scale = font->y_scale;
546 hb_font_set_ppem (hb_font_t *font,
550 if (HB_OBJECT_IS_INERT (font))
553 font->x_ppem = x_ppem;
554 font->y_ppem = y_ppem;
558 hb_font_get_ppem (hb_font_t *font,
559 unsigned int *x_ppem,
560 unsigned int *y_ppem)
562 if (x_ppem) *x_ppem = font->x_ppem;
563 if (y_ppem) *y_ppem = font->y_ppem;