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"
35 typedef struct _hb_face_t hb_face_t;
36 typedef struct _hb_font_t hb_font_t;
43 hb_face_create_for_data (hb_blob_t *blob,
46 typedef hb_blob_t * (*hb_get_table_func_t) (hb_tag_t tag, void *user_data);
48 /* calls destroy() when not needing user_data anymore */
50 hb_face_create_for_tables (hb_get_table_func_t get_table,
51 hb_destroy_func_t destroy,
55 hb_face_reference (hb_face_t *face);
58 hb_face_get_reference_count (hb_face_t *face);
61 hb_face_destroy (hb_face_t *face);
64 hb_face_get_table (hb_face_t *face,
72 typedef struct _hb_font_funcs_t hb_font_funcs_t;
75 hb_font_funcs_create (void);
78 hb_font_funcs_reference (hb_font_funcs_t *ffuncs);
81 hb_font_funcs_get_reference_count (hb_font_funcs_t *ffuncs);
84 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
87 hb_font_funcs_copy (hb_font_funcs_t *ffuncs);
90 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
95 typedef struct _hb_glyph_metrics_t
97 hb_position_t x_advance;
98 hb_position_t y_advance;
99 hb_position_t x_offset;
100 hb_position_t y_offset;
102 hb_position_t height;
103 } hb_glyph_metrics_t;
105 typedef hb_codepoint_t (*hb_font_get_glyph_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
106 hb_codepoint_t unicode, hb_codepoint_t variation_selector);
107 typedef hb_bool_t (*hb_font_get_contour_point_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
108 unsigned int point_index,
109 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y);
110 typedef void (*hb_font_get_glyph_metrics_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
111 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics);
112 typedef hb_position_t (*hb_font_get_kerning_func_t) (hb_font_t *font, hb_face_t *face, const void *user_data,
113 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph);
117 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
118 hb_font_get_glyph_func_t glyph_func);
121 hb_font_funcs_set_contour_point_func (hb_font_funcs_t *ffuncs,
122 hb_font_get_contour_point_func_t contour_point_func);
125 hb_font_funcs_set_glyph_metrics_func (hb_font_funcs_t *ffuncs,
126 hb_font_get_glyph_metrics_func_t glyph_metrics_func);
129 hb_font_funcs_set_kerning_func (hb_font_funcs_t *ffuncs,
130 hb_font_get_kerning_func_t kerning_func);
134 hb_font_get_glyph (hb_font_t *font, hb_face_t *face,
135 hb_codepoint_t unicode, hb_codepoint_t variation_selector);
138 hb_font_get_contour_point (hb_font_t *font, hb_face_t *face,
139 unsigned int point_index,
140 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y);
143 hb_font_get_glyph_metrics (hb_font_t *font, hb_face_t *face,
144 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics);
147 hb_font_get_kerning (hb_font_t *font, hb_face_t *face,
148 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph);
155 /* Fonts are very light-weight objects */
158 hb_font_create (void);
161 hb_font_reference (hb_font_t *font);
164 hb_font_get_reference_count (hb_font_t *font);
167 hb_font_destroy (hb_font_t *font);
170 hb_font_set_funcs (hb_font_t *font,
171 hb_font_funcs_t *klass,
172 hb_destroy_func_t destroy,
176 hb_font_get_funcs (hb_font_t *font);
181 * should we decompose this to units_per_EM and font-size?
182 * units_per_EM setting then can go into the face, or better,
183 * read from the 'head' table.
185 * Then we either need size+shape like freetype does, or a full
189 hb_font_set_scale (hb_font_t *font,
190 hb_16dot16_t x_scale,
191 hb_16dot16_t y_scale);
194 * A zero value means "no hinting in that direction"
197 hb_font_set_ppem (hb_font_t *font,
199 unsigned int y_ppem);
204 #endif /* HB_FONT_H */