2 * Copyright (C) 2009 Red Hat, Inc.
4 * This is part of HarfBuzz, an OpenType Layout engine 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-unicode-private.h"
31 #include "hb-open-file-private.hh"
34 #include "hb-ot-layout-private.h"
40 hb_font_funcs_t _hb_font_funcs_nil = {
41 HB_REFERENCE_COUNT_INVALID, /* ref_count */
45 NULL, /* glyph_func */
46 NULL, /* contour_point_func */
47 NULL, /* glyph_metrics_func */
48 NULL /* kerning_func */
52 hb_font_funcs_create (void)
54 hb_font_funcs_t *ffuncs;
56 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
57 return &_hb_font_funcs_nil;
63 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
65 HB_OBJECT_DO_REFERENCE (ffuncs);
69 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs)
71 HB_OBJECT_DO_GET_REFERENCE_COUNT (ffuncs);
75 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
77 HB_OBJECT_DO_DESTROY (ffuncs);
83 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
85 hb_font_funcs_t *ffuncs;
87 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
88 return &_hb_font_funcs_nil;
90 *ffuncs = *other_ffuncs;
92 /* re-init refcount */
93 HB_OBJECT_DO_INIT (ffuncs);
94 ffuncs->immutable = FALSE;
100 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
102 if (HB_OBJECT_IS_INERT (ffuncs))
105 ffuncs->immutable = TRUE;
115 _hb_face_get_table_from_blob (hb_tag_t tag, void *user_data)
117 hb_face_t *face = (hb_face_t *) user_data;
119 const OpenTypeFontFile &ot_file = Sanitizer<OpenTypeFontFile>::lock_instance (face->blob);
120 const OpenTypeFontFace &ot_face = ot_file.get_face (face->index);
122 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
124 hb_blob_t *blob = hb_blob_create_sub_blob (face->blob, table.offset, table.length);
126 hb_blob_unlock (face->blob);
131 static hb_face_t _hb_face_nil = {
132 HB_REFERENCE_COUNT_INVALID, /* ref_count */
137 NULL, /* get_table */
139 NULL, /* user_data */
141 &_hb_unicode_funcs_nil, /* unicode */
147 hb_face_create_for_tables (hb_get_table_func_t get_table,
148 hb_destroy_func_t destroy,
153 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
156 return &_hb_face_nil;
159 face->get_table = get_table;
160 face->destroy = destroy;
161 face->user_data = user_data;
163 _hb_ot_layout_init (face);
169 hb_face_create_for_data (hb_blob_t *blob,
174 if (!HB_OBJECT_DO_CREATE (hb_face_t, face))
175 return &_hb_face_nil;
177 face->blob = Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob));
179 face->get_table = _hb_face_get_table_from_blob;
180 face->user_data = face;
182 _hb_ot_layout_init (face);
188 hb_face_reference (hb_face_t *face)
190 HB_OBJECT_DO_REFERENCE (face);
194 hb_face_get_reference_count (hb_face_t *face)
196 HB_OBJECT_DO_GET_REFERENCE_COUNT (face);
200 hb_face_destroy (hb_face_t *face)
202 HB_OBJECT_DO_DESTROY (face);
204 _hb_ot_layout_fini (face);
206 hb_blob_destroy (face->blob);
209 face->destroy (face->user_data);
211 hb_unicode_funcs_destroy (face->unicode);
217 hb_face_set_unicode_funcs (hb_face_t *face,
218 hb_unicode_funcs_t *unicode)
220 if (HB_OBJECT_IS_INERT (face))
223 hb_unicode_funcs_reference (unicode);
224 hb_unicode_funcs_destroy (face->unicode);
225 face->unicode = unicode;
229 hb_face_get_table (hb_face_t *face,
232 if (HB_UNLIKELY (!face || !face->get_table))
233 return hb_blob_create_empty ();
235 return face->get_table (tag, face->user_data);
243 static hb_font_t _hb_font_nil = {
244 HB_REFERENCE_COUNT_INVALID, /* ref_count */
256 hb_font_create (void)
260 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
261 return &_hb_font_nil;
267 hb_font_reference (hb_font_t *font)
269 HB_OBJECT_DO_REFERENCE (font);
273 hb_font_get_reference_count (hb_font_t *font)
275 HB_OBJECT_DO_GET_REFERENCE_COUNT (font);
279 hb_font_destroy (hb_font_t *font)
281 HB_OBJECT_DO_DESTROY (font);
283 hb_font_funcs_destroy (font->klass);
289 hb_font_set_funcs (hb_font_t *font,
290 hb_font_funcs_t *klass)
292 if (HB_OBJECT_IS_INERT (font))
295 hb_font_funcs_reference (klass);
296 hb_font_funcs_destroy (font->klass);
301 hb_font_set_scale (hb_font_t *font,
302 hb_16dot16_t x_scale,
303 hb_16dot16_t y_scale)
305 if (HB_OBJECT_IS_INERT (font))
308 font->x_scale = x_scale;
309 font->y_scale = y_scale;
313 hb_font_set_ppem (hb_font_t *font,
317 if (HB_OBJECT_IS_INERT (font))
320 font->x_ppem = x_ppem;
321 font->y_ppem = y_ppem;