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-ot-layout-private.h"
32 #include "hb-open-file-private.hh"
39 static hb_font_funcs_t _hb_font_funcs_nil = {
40 HB_REFERENCE_COUNT_INVALID /* ref_count */
42 hb_font_get_glyph_func_t glyph_func;
43 hb_font_get_contour_point_func_t contour_point_func;
44 hb_font_get_glyph_metrics_func_t glyph_metrics_func;
45 hb_font_get_kerning_func_t kerning_func;
50 hb_font_funcs_create (void)
52 hb_font_funcs_t *ffuncs;
54 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
55 return &_hb_font_funcs_nil;
61 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
63 HB_OBJECT_DO_REFERENCE (ffuncs);
67 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs)
69 HB_OBJECT_DO_GET_REFERENCE_COUNT (ffuncs);
73 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
75 HB_OBJECT_DO_DESTROY (ffuncs);
81 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
83 hb_font_funcs_t *ffuncs;
85 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
86 return &_hb_font_funcs_nil;
88 *ffuncs = *other_ffuncs;
90 /* re-init refcount */
91 HB_OBJECT_DO_INIT (ffuncs);
103 _hb_face_get_table_from_blob (hb_tag_t tag, void *user_data)
105 hb_face_t *face = (hb_face_t *) user_data;
107 const OpenTypeFontFile &ot_file = Sanitizer<OpenTypeFontFile>::lock_instance (face->blob);
108 const OpenTypeFontFace &ot_face = ot_file.get_face (face->index);
110 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
112 hb_blob_t *blob = hb_blob_create_sub_blob (face->blob, table.offset, table.length);
114 hb_blob_unlock (face->blob);
119 static hb_face_t _hb_face_nil = {
120 HB_REFERENCE_COUNT_INVALID, /* ref_count */
125 NULL, /* get_table */
127 NULL, /* user_data */
133 hb_face_create_for_tables (hb_get_table_func_t get_table,
134 hb_destroy_func_t destroy,
139 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
142 return &_hb_face_nil;
145 face->get_table = get_table;
146 face->destroy = destroy;
147 face->user_data = user_data;
149 _hb_ot_layout_init (face);
155 hb_face_create_for_data (hb_blob_t *blob,
160 if (!HB_OBJECT_DO_CREATE (hb_face_t, face))
161 return &_hb_face_nil;
163 face->blob = Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob));
165 face->get_table = _hb_face_get_table_from_blob;
166 face->user_data = face;
168 _hb_ot_layout_init (face);
174 hb_face_reference (hb_face_t *face)
176 HB_OBJECT_DO_REFERENCE (face);
180 hb_face_get_reference_count (hb_face_t *face)
182 HB_OBJECT_DO_GET_REFERENCE_COUNT (face);
186 hb_face_destroy (hb_face_t *face)
188 HB_OBJECT_DO_DESTROY (face);
190 _hb_ot_layout_fini (face);
192 hb_blob_destroy (face->blob);
195 face->destroy (face->user_data);
197 hb_unicode_funcs_destroy (face->unicode);
203 hb_face_set_unicode_funcs (hb_face_t *face,
204 hb_unicode_funcs_t *unicode)
206 if (HB_OBJECT_IS_INERT (face))
209 hb_unicode_funcs_reference (unicode);
210 hb_unicode_funcs_destroy (face->unicode);
211 face->unicode = unicode;
215 hb_face_get_table (hb_face_t *face,
218 if (HB_UNLIKELY (!face || !face->get_table))
219 return hb_blob_create_empty ();
221 return face->get_table (tag, face->user_data);
229 static hb_font_t _hb_font_nil = {
230 HB_REFERENCE_COUNT_INVALID, /* ref_count */
242 hb_font_create (void)
246 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
247 return &_hb_font_nil;
253 hb_font_reference (hb_font_t *font)
255 HB_OBJECT_DO_REFERENCE (font);
259 hb_font_get_reference_count (hb_font_t *font)
261 HB_OBJECT_DO_GET_REFERENCE_COUNT (font);
265 hb_font_destroy (hb_font_t *font)
267 HB_OBJECT_DO_DESTROY (font);
269 hb_font_funcs_destroy (font->klass);
275 hb_font_set_funcs (hb_font_t *font,
276 hb_font_funcs_t *klass)
278 if (HB_OBJECT_IS_INERT (font))
281 hb_font_funcs_reference (klass);
282 hb_font_funcs_destroy (font->klass);
287 hb_font_set_scale (hb_font_t *font,
288 hb_16dot16_t x_scale,
289 hb_16dot16_t y_scale)
291 if (HB_OBJECT_IS_INERT (font))
294 font->x_scale = x_scale;
295 font->y_scale = y_scale;
299 hb_font_set_ppem (hb_font_t *font,
303 if (HB_OBJECT_IS_INERT (font))
306 font->x_ppem = x_ppem;
307 font->y_ppem = y_ppem;