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"
43 hb_font_get_glyph_nil (hb_font_t *font HB_UNUSED,
44 hb_face_t *face HB_UNUSED,
45 const void *user_data HB_UNUSED,
46 hb_codepoint_t unicode HB_UNUSED,
47 hb_codepoint_t variation_selector HB_UNUSED)
51 hb_font_get_contour_point_nil (hb_font_t *font HB_UNUSED,
52 hb_face_t *face HB_UNUSED,
53 const void *user_data HB_UNUSED,
54 unsigned int point_index HB_UNUSED,
55 hb_codepoint_t glyph HB_UNUSED,
56 hb_position_t *x HB_UNUSED,
57 hb_position_t *y HB_UNUSED)
61 hb_font_get_glyph_metrics_nil (hb_font_t *font HB_UNUSED,
62 hb_face_t *face HB_UNUSED,
63 const void *user_data HB_UNUSED,
64 hb_codepoint_t glyph HB_UNUSED,
65 hb_glyph_metrics_t *metrics HB_UNUSED)
69 hb_font_get_kerning_nil (hb_font_t *font HB_UNUSED,
70 hb_face_t *face HB_UNUSED,
71 const void *user_data HB_UNUSED,
72 hb_codepoint_t first_glyph HB_UNUSED,
73 hb_codepoint_t second_glyph HB_UNUSED)
76 hb_font_funcs_t _hb_font_funcs_nil = {
77 HB_REFERENCE_COUNT_INVALID, /* ref_count */
80 hb_font_get_glyph_nil,
81 hb_font_get_contour_point_nil,
82 hb_font_get_glyph_metrics_nil,
83 hb_font_get_kerning_nil
88 hb_font_funcs_create (void)
90 hb_font_funcs_t *ffuncs;
92 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
93 return &_hb_font_funcs_nil;
95 ffuncs->v = _hb_font_funcs_nil.v;
101 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
103 HB_OBJECT_DO_REFERENCE (ffuncs);
107 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs)
109 HB_OBJECT_DO_GET_REFERENCE_COUNT (ffuncs);
113 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
115 HB_OBJECT_DO_DESTROY (ffuncs);
121 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
123 hb_font_funcs_t *ffuncs;
125 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
126 return &_hb_font_funcs_nil;
128 ffuncs->v = other_ffuncs->v;
134 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
136 if (HB_OBJECT_IS_INERT (ffuncs))
139 ffuncs->immutable = TRUE;
144 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
145 hb_font_get_glyph_func_t glyph_func)
147 if (ffuncs->immutable)
150 ffuncs->v.get_glyph = glyph_func ? glyph_func : hb_font_get_glyph_nil;
154 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
155 hb_font_get_contour_point_func_t contour_point_func)
157 if (ffuncs->immutable)
160 ffuncs->v.get_contour_point = contour_point_func ? contour_point_func : hb_font_get_contour_point_nil;
164 hb_font_funcs_set_glyph_metrics_func (hb_font_funcs_t *ffuncs,
165 hb_font_get_glyph_metrics_func_t glyph_metrics_func)
167 if (ffuncs->immutable)
170 ffuncs->v.get_glyph_metrics = glyph_metrics_func ? glyph_metrics_func : hb_font_get_glyph_metrics_nil;
174 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
175 hb_font_get_kerning_func_t kerning_func)
177 if (ffuncs->immutable)
180 ffuncs->v.get_kerning = kerning_func ? kerning_func : hb_font_get_kerning_nil;
185 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
186 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
188 return font->klass->v.get_glyph (font, face, font->user_data,
189 unicode, variation_selector);
193 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
194 unsigned int point_index,
195 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
198 return font->klass->v.get_contour_point (font, face, font->user_data,
204 hb_font_get_glyph_metrics (hb_font_t *font, hb_face_t *face,
205 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics)
207 memset (metrics, 0, sizeof (*metrics));
208 return font->klass->v.get_glyph_metrics (font, face, font->user_data,
213 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
214 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
216 return font->klass->v.get_kerning (font, face, font->user_data,
217 first_glyph, second_glyph);
225 static hb_face_t _hb_face_nil = {
226 HB_REFERENCE_COUNT_INVALID, /* ref_count */
228 NULL, /* get_table */
230 NULL, /* user_data */
232 NULL, /* head_blob */
233 NULL, /* head_table */
240 hb_face_create_for_tables (hb_get_table_func_t get_table,
241 hb_destroy_func_t destroy,
246 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
249 return &_hb_face_nil;
252 face->get_table = get_table;
253 face->destroy = destroy;
254 face->user_data = user_data;
256 face->ot_layout = _hb_ot_layout_new (face);
258 face->head_blob = Sanitizer<head>::sanitize (hb_face_get_table (face, HB_OT_TAG_head));
259 face->head_table = Sanitizer<head>::lock_instance (face->head_blob);
265 typedef struct _hb_face_for_data_closure_t {
268 } hb_face_for_data_closure_t;
270 static hb_face_for_data_closure_t *
271 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
273 hb_face_for_data_closure_t *closure;
275 closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
276 if (unlikely (!closure))
279 closure->blob = hb_blob_reference (blob);
280 closure->index = index;
286 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
288 hb_blob_destroy (closure->blob);
293 _hb_face_for_data_get_table (hb_tag_t tag, void *user_data)
295 hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
297 const OpenTypeFontFile &ot_file = *Sanitizer<OpenTypeFontFile>::lock_instance (data->blob);
298 const OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
300 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
302 hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
304 hb_blob_unlock (data->blob);
310 hb_face_create_for_data (hb_blob_t *blob,
313 hb_blob_reference (blob);
314 hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer<OpenTypeFontFile>::sanitize (blob), index);
315 hb_blob_destroy (blob);
317 if (unlikely (!closure))
318 return &_hb_face_nil;
320 return hb_face_create_for_tables (_hb_face_for_data_get_table,
321 (hb_destroy_func_t) _hb_face_for_data_closure_destroy,
327 hb_face_reference (hb_face_t *face)
329 HB_OBJECT_DO_REFERENCE (face);
333 hb_face_get_reference_count (hb_face_t *face)
335 HB_OBJECT_DO_GET_REFERENCE_COUNT (face);
339 hb_face_destroy (hb_face_t *face)
341 HB_OBJECT_DO_DESTROY (face);
343 _hb_ot_layout_free (face->ot_layout);
345 hb_blob_unlock (face->head_blob);
346 hb_blob_destroy (face->head_blob);
349 face->destroy (face->user_data);
355 hb_face_get_table (hb_face_t *face,
360 if (unlikely (!face || !face->get_table))
361 return &_hb_blob_nil;
363 blob = face->get_table (tag, face->user_data);
373 static hb_font_t _hb_font_nil = {
374 HB_REFERENCE_COUNT_INVALID, /* ref_count */
388 hb_font_create (void)
392 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
393 return &_hb_font_nil;
395 font->klass = &_hb_font_funcs_nil;
401 hb_font_reference (hb_font_t *font)
403 HB_OBJECT_DO_REFERENCE (font);
407 hb_font_get_reference_count (hb_font_t *font)
409 HB_OBJECT_DO_GET_REFERENCE_COUNT (font);
413 hb_font_destroy (hb_font_t *font)
415 HB_OBJECT_DO_DESTROY (font);
417 hb_font_funcs_destroy (font->klass);
419 font->destroy (font->user_data);
425 hb_font_set_funcs (hb_font_t *font,
426 hb_font_funcs_t *klass,
427 hb_destroy_func_t destroy,
430 if (HB_OBJECT_IS_INERT (font))
434 font->destroy (font->user_data);
437 klass = &_hb_font_funcs_nil;
439 hb_font_funcs_reference (klass);
440 hb_font_funcs_destroy (font->klass);
442 font->destroy = destroy;
443 font->user_data = user_data;
447 hb_font_set_scale (hb_font_t *font,
448 unsigned int x_scale,
449 unsigned int y_scale)
451 if (HB_OBJECT_IS_INERT (font))
454 font->x_scale = x_scale;
455 font->y_scale = y_scale;
459 hb_font_set_ppem (hb_font_t *font,
463 if (HB_OBJECT_IS_INERT (font))
466 font->x_ppem = x_ppem;
467 font->y_ppem = y_ppem;