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
30 #include "hb-common.h"
36 typedef struct _hb_face_t hb_face_t;
37 typedef struct _hb_font_t hb_font_t;
44 hb_face_create_for_data (hb_blob_t *blob,
47 typedef hb_blob_t * (*hb_get_table_func_t) (hb_tag_t tag, void *user_data);
49 /* calls destroy() when not needing user_data anymore */
51 hb_face_create_for_tables (hb_get_table_func_t get_table,
52 hb_destroy_func_t destroy,
56 hb_face_reference (hb_face_t *face);
59 hb_face_get_reference_count (hb_face_t *face);
62 hb_face_destroy (hb_face_t *face);
64 /* Returns NULL if not found */
66 hb_face_get_table (hb_face_t *face,
74 typedef struct _hb_font_funcs_t hb_font_funcs_t;
77 hb_font_funcs_create (void);
80 hb_font_funcs_reference (hb_font_funcs_t *ffuncs);
83 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs);
86 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
89 hb_font_funcs_copy (hb_font_funcs_t *ffuncs);
92 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
95 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs);
99 typedef struct _hb_glyph_metrics_t
101 hb_position_t x_advance;
102 hb_position_t y_advance;
103 hb_position_t x_offset;
104 hb_position_t y_offset;
106 hb_position_t height;
107 } hb_glyph_metrics_t;
109 typedef hb_codepoint_t (*hb_font_get_glyph_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
110 hb_codepoint_t unicode, hb_codepoint_t variation_selector);
111 typedef hb_bool_t (*hb_font_get_contour_point_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
112 unsigned int point_index,
113 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y);
114 typedef void (*hb_font_get_glyph_metrics_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
115 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics);
116 typedef hb_position_t (*hb_font_get_kerning_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
117 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph);
121 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
122 hb_font_get_glyph_func_t glyph_func);
125 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
126 hb_font_get_contour_point_func_t contour_point_func);
129 hb_font_funcs_set_glyph_metrics_func (hb_font_funcs_t *ffuncs,
130 hb_font_get_glyph_metrics_func_t glyph_metrics_func);
133 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
134 hb_font_get_kerning_func_t kerning_func);
137 /* These never return NULL. Return fallback defaults instead. */
139 hb_font_get_glyph_func_t
140 hb_font_funcs_get_glyph_func (hb_font_funcs_t *ffuncs);
142 hb_font_get_contour_point_func_t
143 hb_font_funcs_get_contour_point_func (hb_font_funcs_t *ffuncs);
145 hb_font_get_glyph_metrics_func_t
146 hb_font_funcs_get_glyph_metrics_func (hb_font_funcs_t *ffuncs);
148 hb_font_get_kerning_func_t
149 hb_font_funcs_get_kerning_func (hb_font_funcs_t *ffuncs);
153 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
154 hb_codepoint_t unicode, hb_codepoint_t variation_selector);
157 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
158 unsigned int point_index,
159 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y);
162 hb_font_get_glyph_metrics (hb_font_t *font, hb_face_t *face,
163 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics);
166 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
167 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph);
174 /* Fonts are very light-weight objects */
177 hb_font_create (void);
180 hb_font_reference (hb_font_t *font);
183 hb_font_get_reference_count (hb_font_t *font);
186 hb_font_destroy (hb_font_t *font);
189 hb_font_set_funcs (hb_font_t *font,
190 hb_font_funcs_t *klass,
191 hb_destroy_func_t destroy,
194 /* Returns what was set and unsets it, but doesn't destroy(user_data).
195 * This is useful for wrapping / chaining font_funcs_t's.
197 * The client is responsible for:
199 * - Take ownership of the reference on the returned klass
200 * - Calling "destroy(user_data)" exactly once if returned destroy func
201 * is not NULL and the returned info is not needed anymore.
204 hb_font_unset_funcs (hb_font_t *font,
205 hb_font_funcs_t **klass,
206 hb_destroy_func_t *destroy,
211 * We should add support for full matrices.
214 hb_font_set_scale (hb_font_t *font,
215 unsigned int x_scale,
216 unsigned int y_scale);
219 hb_font_get_scale (hb_font_t *font,
220 unsigned int *x_scale,
221 unsigned int *y_scale);
224 * A zero value means "no hinting in that direction"
227 hb_font_set_ppem (hb_font_t *font,
229 unsigned int y_ppem);
232 hb_font_get_ppem (hb_font_t *font,
233 unsigned int *x_ppem,
234 unsigned int *y_ppem);
239 #endif /* HB_FONT_H */