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-open-file-private.hh"
33 #include "hb-ot-layout-private.h"
43 hb_font_get_glyph_nil (hb_font_t *font HB_GNUC_UNUSED,
44 hb_face_t *face HB_GNUC_UNUSED,
45 const void *user_data HB_GNUC_UNUSED,
46 hb_codepoint_t unicode HB_GNUC_UNUSED,
47 hb_codepoint_t variation_selector HB_GNUC_UNUSED)
51 hb_font_get_contour_point_nil (hb_font_t *font HB_GNUC_UNUSED,
52 hb_face_t *face HB_GNUC_UNUSED,
53 const void *user_data HB_GNUC_UNUSED,
54 unsigned int point_index HB_GNUC_UNUSED,
55 hb_codepoint_t glyph HB_GNUC_UNUSED,
56 hb_position_t *x HB_GNUC_UNUSED,
57 hb_position_t *y HB_GNUC_UNUSED)
61 hb_font_get_glyph_metrics_nil (hb_font_t *font HB_GNUC_UNUSED,
62 hb_face_t *face HB_GNUC_UNUSED,
63 const void *user_data HB_GNUC_UNUSED,
64 hb_codepoint_t glyph HB_GNUC_UNUSED,
65 hb_glyph_metrics_t *metrics HB_GNUC_UNUSED)
69 hb_font_get_kerning_nil (hb_font_t *font HB_GNUC_UNUSED,
70 hb_face_t *face HB_GNUC_UNUSED,
71 const void *user_data HB_GNUC_UNUSED,
72 hb_codepoint_t first_glyph HB_GNUC_UNUSED,
73 hb_codepoint_t second_glyph HB_GNUC_UNUSED)
76 hb_font_funcs_t _hb_font_funcs_nil = {
77 HB_REFERENCE_COUNT_INVALID, /* ref_count */
81 hb_font_get_glyph_nil,
82 hb_font_get_contour_point_nil,
83 hb_font_get_glyph_metrics_nil,
84 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;
99 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
101 HB_OBJECT_DO_REFERENCE (ffuncs);
105 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs)
107 HB_OBJECT_DO_GET_REFERENCE_COUNT (ffuncs);
111 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
113 HB_OBJECT_DO_DESTROY (ffuncs);
119 hb_font_funcs_copy (hb_font_funcs_t *other_ffuncs)
121 hb_font_funcs_t *ffuncs;
123 if (!HB_OBJECT_DO_CREATE (hb_font_funcs_t, ffuncs))
124 return &_hb_font_funcs_nil;
126 *ffuncs = *other_ffuncs;
128 /* re-init refcount */
129 HB_OBJECT_DO_INIT (ffuncs);
130 ffuncs->immutable = FALSE;
136 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
138 if (HB_OBJECT_IS_INERT (ffuncs))
141 ffuncs->immutable = TRUE;
146 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
147 hb_font_get_glyph_func_t glyph_func)
149 if (ffuncs->immutable)
152 ffuncs->get_glyph = glyph_func ? glyph_func : hb_font_get_glyph_nil;
156 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
157 hb_font_get_contour_point_func_t contour_point_func)
159 if (ffuncs->immutable)
162 ffuncs->get_contour_point = contour_point_func ? contour_point_func : hb_font_get_contour_point_nil;
166 hb_font_funcs_set_glyph_metrics_func (hb_font_funcs_t *ffuncs,
167 hb_font_get_glyph_metrics_func_t glyph_metrics_func)
169 if (ffuncs->immutable)
172 ffuncs->get_glyph_metrics = glyph_metrics_func ? glyph_metrics_func : hb_font_get_glyph_metrics_nil;
176 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
177 hb_font_get_kerning_func_t kerning_func)
179 if (ffuncs->immutable)
182 ffuncs->get_kerning = kerning_func ? kerning_func : hb_font_get_kerning_nil;
187 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
188 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
190 return font->klass->get_glyph (font, face, font->user_data,
191 unicode, variation_selector);
195 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
196 unsigned int point_index,
197 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
199 return font->klass->get_contour_point (font, face, font->user_data,
205 hb_font_get_glyph_metrics (hb_font_t *font, hb_face_t *face,
206 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics)
208 memset (metrics, 0, sizeof (*metrics));
209 return font->klass->get_glyph_metrics (font, face, font->user_data,
214 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
215 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
217 return font->klass->get_kerning (font, face, font->user_data,
218 first_glyph, second_glyph);
226 _hb_face_get_table_from_blob (hb_tag_t tag, void *user_data)
228 hb_face_t *face = (hb_face_t *) user_data;
230 const OpenTypeFontFile &ot_file = *CastP<OpenTypeFontFile> (hb_blob_lock (face->blob));
231 const OpenTypeFontFace &ot_face = ot_file.get_face (face->index);
233 const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
235 hb_blob_t *blob = hb_blob_create_sub_blob (face->blob, table.offset, table.length);
237 hb_blob_unlock (face->blob);
242 static hb_face_t _hb_face_nil = {
243 HB_REFERENCE_COUNT_INVALID, /* ref_count */
248 NULL, /* get_table */
250 NULL, /* user_data */
256 hb_face_create_for_tables (hb_get_table_func_t get_table,
257 hb_destroy_func_t destroy,
262 if (!HB_OBJECT_DO_CREATE (hb_face_t, face)) {
265 return &_hb_face_nil;
268 face->get_table = get_table;
269 face->destroy = destroy;
270 face->user_data = user_data;
272 _hb_ot_layout_init (face);
278 hb_face_create_for_data (hb_blob_t *blob,
283 if (!HB_OBJECT_DO_CREATE (hb_face_t, face))
284 return &_hb_face_nil;
286 face->blob = Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob));
288 face->get_table = _hb_face_get_table_from_blob;
289 face->user_data = face;
291 _hb_ot_layout_init (face);
297 hb_face_reference (hb_face_t *face)
299 HB_OBJECT_DO_REFERENCE (face);
303 hb_face_get_reference_count (hb_face_t *face)
305 HB_OBJECT_DO_GET_REFERENCE_COUNT (face);
309 hb_face_destroy (hb_face_t *face)
311 HB_OBJECT_DO_DESTROY (face);
313 _hb_ot_layout_fini (face);
315 hb_blob_destroy (face->blob);
318 face->destroy (face->user_data);
324 hb_face_get_table (hb_face_t *face,
327 if (HB_UNLIKELY (!face || !face->get_table))
328 return hb_blob_create_empty ();
330 return face->get_table (tag, face->user_data);
338 static hb_font_t _hb_font_nil = {
339 HB_REFERENCE_COUNT_INVALID, /* ref_count */
353 hb_font_create (void)
357 if (!HB_OBJECT_DO_CREATE (hb_font_t, font))
358 return &_hb_font_nil;
360 font->klass = &_hb_font_funcs_nil;
366 hb_font_reference (hb_font_t *font)
368 HB_OBJECT_DO_REFERENCE (font);
372 hb_font_get_reference_count (hb_font_t *font)
374 HB_OBJECT_DO_GET_REFERENCE_COUNT (font);
378 hb_font_destroy (hb_font_t *font)
380 HB_OBJECT_DO_DESTROY (font);
382 hb_font_funcs_destroy (font->klass);
384 font->destroy (font->user_data);
390 hb_font_set_funcs (hb_font_t *font,
391 hb_font_funcs_t *klass,
392 hb_destroy_func_t destroy,
395 if (HB_OBJECT_IS_INERT (font))
399 font->destroy (font->user_data);
402 klass = &_hb_font_funcs_nil;
404 hb_font_funcs_reference (klass);
405 hb_font_funcs_destroy (font->klass);
407 font->destroy = destroy;
408 font->user_data = user_data;
412 hb_font_set_scale (hb_font_t *font,
413 hb_16dot16_t x_scale,
414 hb_16dot16_t y_scale)
416 if (HB_OBJECT_IS_INERT (font))
419 font->x_scale = x_scale;
420 font->y_scale = y_scale;
424 hb_font_set_ppem (hb_font_t *font,
428 if (HB_OBJECT_IS_INERT (font))
431 font->x_ppem = x_ppem;
432 font->y_ppem = y_ppem;