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_OBJECT_HEADER_STATIC,
92 hb_font_get_glyph_nil,
93 hb_font_get_glyph_advance_nil,
94 hb_font_get_glyph_extents_nil,
95 hb_font_get_contour_point_nil,
96 hb_font_get_kerning_nil
101 hb_font_funcs_create (void)
103 hb_font_funcs_t *ffuncs;
105 if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
106 return &_hb_font_funcs_nil;
108 ffuncs->v = _hb_font_funcs_nil.v;
114 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
116 return hb_object_reference (ffuncs);
120 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
122 if (!hb_object_destroy (ffuncs)) return;
128 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
130 hb_font_funcs_t *ffuncs;
132 if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
133 return &_hb_font_funcs_nil;
135 ffuncs->v = other_ffuncs->v;
141 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
143 if (hb_object_is_inert (ffuncs))
146 ffuncs->immutable = TRUE;
150 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
152 return ffuncs->immutable;
157 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
158 hb_font_get_glyph_func_t glyph_func)
160 if (ffuncs->immutable)
163 ffuncs->v.get_glyph = glyph_func ? glyph_func : hb_font_get_glyph_nil;
167 hb_font_funcs_set_glyph_advance_func (hb_font_funcs_t *ffuncs,
168 hb_font_get_glyph_advance_func_t glyph_advance_func)
170 if (ffuncs->immutable)
173 ffuncs->v.get_glyph_advance = glyph_advance_func ? glyph_advance_func : hb_font_get_glyph_advance_nil;
177 hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
178 hb_font_get_glyph_extents_func_t glyph_extents_func)
180 if (ffuncs->immutable)
183 ffuncs->v.get_glyph_extents = glyph_extents_func ? glyph_extents_func : hb_font_get_glyph_extents_nil;
187 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
188 hb_font_get_contour_point_func_t contour_point_func)
190 if (ffuncs->immutable)
193 ffuncs->v.get_contour_point = contour_point_func ? contour_point_func : hb_font_get_contour_point_nil;
197 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
198 hb_font_get_kerning_func_t kerning_func)
200 if (ffuncs->immutable)
203 ffuncs->v.get_kerning = kerning_func ? kerning_func : hb_font_get_kerning_nil;
207 hb_font_get_glyph_func_t
208 hb_font_funcs_get_glyph_func (hb_font_funcs_t *ffuncs)
210 return ffuncs->v.get_glyph;
213 hb_font_get_glyph_advance_func_t
214 hb_font_funcs_get_glyph_advance_func (hb_font_funcs_t *ffuncs)
216 return ffuncs->v.get_glyph_advance;
219 hb_font_get_glyph_extents_func_t
220 hb_font_funcs_get_glyph_extents_func (hb_font_funcs_t *ffuncs)
222 return ffuncs->v.get_glyph_extents;
225 hb_font_get_contour_point_func_t
226 hb_font_funcs_get_contour_point_func (hb_font_funcs_t *ffuncs)
228 return ffuncs->v.get_contour_point;
231 hb_font_get_kerning_func_t
232 hb_font_funcs_get_kerning_func (hb_font_funcs_t *ffuncs)
234 return ffuncs->v.get_kerning;
240 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
241 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
243 return font->klass->v.get_glyph (font, face, font->user_data,
244 unicode, variation_selector);
248 hb_font_get_glyph_advance (hb_font_t *font, hb_face_t *face,
249 hb_codepoint_t glyph,
250 hb_position_t *x_advance, hb_position_t *y_advance)
252 *x_advance = *y_advance = 0;
253 return font->klass->v.get_glyph_advance (font, face, font->user_data,
254 glyph, x_advance, y_advance);
258 hb_font_get_glyph_extents (hb_font_t *font, hb_face_t *face,
259 hb_codepoint_t glyph, hb_glyph_extents_t *extents)
261 memset (extents, 0, sizeof (*extents));
262 return font->klass->v.get_glyph_extents (font, face, font->user_data,
267 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
268 unsigned int point_index,
269 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
272 return font->klass->v.get_contour_point (font, face, font->user_data,
278 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
279 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
281 return font->klass->v.get_kerning (font, face, font->user_data,
282 first_glyph, second_glyph);
290 static hb_face_t _hb_face_nil = {
291 HB_OBJECT_HEADER_STATIC,
293 NULL, /* get_table */
294 NULL, /* user_data */
297 NULL, /* head_blob */
298 NULL, /* head_table */
305 hb_face_create_for_tables (hb_get_table_func_t get_table,
307 hb_destroy_func_t destroy)
311 if (!(face = hb_object_create<hb_face_t> ())) {
314 return &_hb_face_nil;
317 face->get_table = get_table;
318 face->user_data = user_data;
319 face->destroy = destroy;
321 face->ot_layout = _hb_ot_layout_new (face);
323 face->head_blob = Sanitizer<head>::sanitize (hb_face_reference_table (face, HB_OT_TAG_head));
324 face->head_table = Sanitizer<head>::lock_instance (face->head_blob);
330 typedef struct _hb_face_for_data_closure_t {
333 } hb_face_for_data_closure_t;
335 static hb_face_for_data_closure_t *
336 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
338 hb_face_for_data_closure_t *closure;
340 closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
341 if (unlikely (!closure))
344 closure->blob = blob;
345 closure->index = index;
351 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
353 hb_blob_destroy (closure->blob);
358 _hb_face_for_data_get_table (hb_tag_t tag, void *user_data)
360 hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
362 const OpenTypeFontFile &ot_file = *Sanitizer<OpenTypeFontFile>::lock_instance (data->blob);
363 const OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
365 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
367 hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
369 hb_blob_unlock (data->blob);
375 hb_face_create_for_data (hb_blob_t *blob,
378 hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
380 if (unlikely (!closure))
381 return &_hb_face_nil;
383 return hb_face_create_for_tables (_hb_face_for_data_get_table,
385 (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
390 hb_face_reference (hb_face_t *face)
392 return hb_object_reference (face);
396 hb_face_destroy (hb_face_t *face)
398 if (!hb_object_destroy (face)) return;
400 _hb_ot_layout_free (face->ot_layout);
402 hb_blob_unlock (face->head_blob);
403 hb_blob_destroy (face->head_blob);
406 face->destroy (face->user_data);
412 hb_face_reference_table (hb_face_t *face,
417 if (unlikely (!face || !face->get_table))
418 return &_hb_blob_nil;
420 blob = face->get_table (tag, face->user_data);
421 if (unlikely (!blob))
422 blob = hb_blob_create_empty();
428 hb_face_get_upem (hb_face_t *face)
430 return (face->head_table ? face->head_table : &Null(head))->get_upem ();
438 static hb_font_t _hb_font_nil = {
439 HB_OBJECT_HEADER_STATIC,
448 NULL, /* user_data */
453 hb_font_create (void)
457 if (!(font = hb_object_create<hb_font_t> ()))
458 return &_hb_font_nil;
460 font->klass = &_hb_font_funcs_nil;
466 hb_font_reference (hb_font_t *font)
468 return hb_object_reference (font);
472 hb_font_destroy (hb_font_t *font)
474 if (!hb_object_destroy (font)) return;
476 hb_font_funcs_destroy (font->klass);
478 font->destroy (font->user_data);
484 hb_font_set_funcs (hb_font_t *font,
485 hb_font_funcs_t *klass,
487 hb_destroy_func_t destroy)
489 if (hb_object_is_inert (font))
493 font->destroy (font->user_data);
496 klass = &_hb_font_funcs_nil;
498 hb_font_funcs_reference (klass);
499 hb_font_funcs_destroy (font->klass);
501 font->user_data = user_data;
502 font->destroy = destroy;
506 hb_font_unset_funcs (hb_font_t *font,
507 hb_font_funcs_t **klass,
509 hb_destroy_func_t *destroy)
511 /* None of the input arguments can be NULL. */
513 *klass = font->klass;
514 *user_data = font->user_data;
515 *destroy = font->destroy;
517 if (hb_object_is_inert (font))
521 font->user_data = NULL;
522 font->destroy = NULL;
526 hb_font_set_scale (hb_font_t *font,
530 if (hb_object_is_inert (font))
533 font->x_scale = x_scale;
534 font->y_scale = y_scale;
538 hb_font_get_scale (hb_font_t *font,
542 if (x_scale) *x_scale = font->x_scale;
543 if (y_scale) *y_scale = font->y_scale;
547 hb_font_set_ppem (hb_font_t *font,
551 if (hb_object_is_inert (font))
554 font->x_ppem = x_ppem;
555 font->y_ppem = y_ppem;
559 hb_font_get_ppem (hb_font_t *font,
560 unsigned int *x_ppem,
561 unsigned int *y_ppem)
563 if (x_ppem) *x_ppem = font->x_ppem;
564 if (y_ppem) *y_ppem = font->y_ppem;