2 * Copyright (C) 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.h"
29 #include "hb-font-private.h"
30 #include "hb-blob-private.h"
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_get_reference_count (hb_font_funcs_t *ffuncs)
121 HB_OBJECT_DO_GET_REFERENCE_COUNT (ffuncs);
125 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
127 HB_OBJECT_DO_DESTROY (ffuncs);
133 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
135 hb_font_funcs_t *ffuncs;
137 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
138 return &_hb_font_funcs_nil;
140 ffuncs->v = other_ffuncs->v;
146 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
148 if (HB_OBJECT_IS_INERT (ffuncs))
151 ffuncs->immutable = TRUE;
155 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
157 return ffuncs->immutable;
162 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
163 hb_font_get_glyph_func_t glyph_func)
165 if (ffuncs->immutable)
168 ffuncs->v.get_glyph = glyph_func ? glyph_func : hb_font_get_glyph_nil;
172 hb_font_funcs_set_glyph_advance_func (hb_font_funcs_t *ffuncs,
173 hb_font_get_glyph_advance_func_t glyph_advance_func)
175 if (ffuncs->immutable)
178 ffuncs->v.get_glyph_advance = glyph_advance_func ? glyph_advance_func : hb_font_get_glyph_advance_nil;
182 hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
183 hb_font_get_glyph_extents_func_t glyph_extents_func)
185 if (ffuncs->immutable)
188 ffuncs->v.get_glyph_extents = glyph_extents_func ? glyph_extents_func : hb_font_get_glyph_extents_nil;
192 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
193 hb_font_get_contour_point_func_t contour_point_func)
195 if (ffuncs->immutable)
198 ffuncs->v.get_contour_point = contour_point_func ? contour_point_func : hb_font_get_contour_point_nil;
202 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
203 hb_font_get_kerning_func_t kerning_func)
205 if (ffuncs->immutable)
208 ffuncs->v.get_kerning = kerning_func ? kerning_func : hb_font_get_kerning_nil;
212 hb_font_get_glyph_func_t
213 hb_font_funcs_get_glyph_func (hb_font_funcs_t *ffuncs)
215 return ffuncs->v.get_glyph;
218 hb_font_get_glyph_advance_func_t
219 hb_font_funcs_get_glyph_advance_func (hb_font_funcs_t *ffuncs)
221 return ffuncs->v.get_glyph_advance;
224 hb_font_get_glyph_extents_func_t
225 hb_font_funcs_get_glyph_extents_func (hb_font_funcs_t *ffuncs)
227 return ffuncs->v.get_glyph_extents;
230 hb_font_get_contour_point_func_t
231 hb_font_funcs_get_contour_point_func (hb_font_funcs_t *ffuncs)
233 return ffuncs->v.get_contour_point;
236 hb_font_get_kerning_func_t
237 hb_font_funcs_get_kerning_func (hb_font_funcs_t *ffuncs)
239 return ffuncs->v.get_kerning;
245 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
246 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
248 return font->klass->v.get_glyph (font, face, font->user_data,
249 unicode, variation_selector);
253 hb_font_get_glyph_advance (hb_font_t *font, hb_face_t *face,
254 hb_codepoint_t glyph,
255 hb_position_t *x_advance, hb_position_t *y_advance)
257 *x_advance = *y_advance = 0;
258 return font->klass->v.get_glyph_advance (font, face, font->user_data,
259 glyph, x_advance, y_advance);
263 hb_font_get_glyph_extents (hb_font_t *font, hb_face_t *face,
264 hb_codepoint_t glyph, hb_glyph_extents_t *extents)
266 memset (extents, 0, sizeof (*extents));
267 return font->klass->v.get_glyph_extents (font, face, font->user_data,
272 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
273 unsigned int point_index,
274 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
277 return font->klass->v.get_contour_point (font, face, font->user_data,
283 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
284 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
286 return font->klass->v.get_kerning (font, face, font->user_data,
287 first_glyph, second_glyph);
295 static hb_face_t _hb_face_nil = {
296 HB_REFERENCE_COUNT_INVALID, /* ref_count */
298 NULL, /* get_table */
300 NULL, /* user_data */
302 NULL, /* head_blob */
303 NULL, /* head_table */
310 hb_face_create_for_tables (hb_get_table_func_t get_table,
311 hb_destroy_func_t destroy,
316 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
319 return &_hb_face_nil;
322 face->get_table = get_table;
323 face->destroy = destroy;
324 face->user_data = user_data;
326 face->ot_layout = _hb_ot_layout_new (face);
328 face->head_blob = Sanitizer<head>::sanitize (hb_face_get_table (face, HB_OT_TAG_head));
329 face->head_table = Sanitizer<head>::lock_instance (face->head_blob);
335 typedef struct _hb_face_for_data_closure_t {
338 } hb_face_for_data_closure_t;
340 static hb_face_for_data_closure_t *
341 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
343 hb_face_for_data_closure_t *closure;
345 closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
346 if (unlikely (!closure))
349 closure->blob = blob;
350 closure->index = index;
356 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
358 hb_blob_destroy (closure->blob);
363 _hb_face_for_data_get_table (hb_tag_t tag, void *user_data)
365 hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
367 const OpenTypeFontFile &ot_file = *Sanitizer<OpenTypeFontFile>::lock_instance (data->blob);
368 const OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
370 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
372 hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
374 hb_blob_unlock (data->blob);
380 hb_face_create_for_data (hb_blob_t *blob,
383 hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
385 if (unlikely (!closure))
386 return &_hb_face_nil;
388 return hb_face_create_for_tables (_hb_face_for_data_get_table,
389 (hb_destroy_func_t) _hb_face_for_data_closure_destroy,
395 hb_face_reference (hb_face_t *face)
397 HB_OBJECT_DO_REFERENCE (face);
401 hb_face_get_reference_count (hb_face_t *face)
403 HB_OBJECT_DO_GET_REFERENCE_COUNT (face);
407 hb_face_destroy (hb_face_t *face)
409 HB_OBJECT_DO_DESTROY (face);
411 _hb_ot_layout_free (face->ot_layout);
413 hb_blob_unlock (face->head_blob);
414 hb_blob_destroy (face->head_blob);
417 face->destroy (face->user_data);
423 hb_face_get_table (hb_face_t *face,
428 if (unlikely (!face || !face->get_table))
429 return &_hb_blob_nil;
431 blob = face->get_table (tag, face->user_data);
437 hb_face_get_upem (hb_face_t *face)
439 return (face->head_table ? face->head_table : &Null(head))->get_upem ();
447 static hb_font_t _hb_font_nil = {
448 HB_REFERENCE_COUNT_INVALID, /* ref_count */
462 hb_font_create (void)
466 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
467 return &_hb_font_nil;
469 font->klass = &_hb_font_funcs_nil;
475 hb_font_reference (hb_font_t *font)
477 HB_OBJECT_DO_REFERENCE (font);
481 hb_font_get_reference_count (hb_font_t *font)
483 HB_OBJECT_DO_GET_REFERENCE_COUNT (font);
487 hb_font_destroy (hb_font_t *font)
489 HB_OBJECT_DO_DESTROY (font);
491 hb_font_funcs_destroy (font->klass);
493 font->destroy (font->user_data);
499 hb_font_set_funcs (hb_font_t *font,
500 hb_font_funcs_t *klass,
501 hb_destroy_func_t destroy,
504 if (HB_OBJECT_IS_INERT (font))
508 font->destroy (font->user_data);
511 klass = &_hb_font_funcs_nil;
513 hb_font_funcs_reference (klass);
514 hb_font_funcs_destroy (font->klass);
516 font->destroy = destroy;
517 font->user_data = user_data;
521 hb_font_unset_funcs (hb_font_t *font,
522 hb_font_funcs_t **klass,
523 hb_destroy_func_t *destroy,
526 /* None of the input arguments can be NULL. */
528 *klass = font->klass;
529 *destroy = font->destroy;
530 *user_data = font->user_data;
532 if (HB_OBJECT_IS_INERT (font))
536 font->destroy = NULL;
537 font->user_data = NULL;
541 hb_font_set_scale (hb_font_t *font,
542 unsigned int x_scale,
543 unsigned int y_scale)
545 if (HB_OBJECT_IS_INERT (font))
548 font->x_scale = x_scale;
549 font->y_scale = y_scale;
553 hb_font_get_scale (hb_font_t *font,
554 unsigned int *x_scale,
555 unsigned int *y_scale)
557 if (x_scale) *x_scale = font->x_scale;
558 if (y_scale) *y_scale = font->y_scale;
562 hb_font_set_ppem (hb_font_t *font,
566 if (HB_OBJECT_IS_INERT (font))
569 font->x_ppem = x_ppem;
570 font->y_ppem = y_ppem;
574 hb_font_get_ppem (hb_font_t *font,
575 unsigned int *x_ppem,
576 unsigned int *y_ppem)
578 if (x_ppem) *x_ppem = font->x_ppem;
579 if (y_ppem) *y_ppem = font->y_ppem;