FreeBSD/Linux Kernel Cross Reference
sys/sys/font.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009, 2013 The FreeBSD Foundation
5 *
6 * This software was developed by Ed Schouten under sponsorship from the
7 * FreeBSD Foundation.
8 *
9 * Portions of this software were developed by Oleksandr Rybalko
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD$
34 */
35
36 #ifndef _SYS_FONT_H_
37 #define _SYS_FONT_H_
38
39 #include <sys/queue.h>
40
41 /*
42 * Fonts.
43 *
44 * Fonts support normal and bold weights, and single and double width glyphs.
45 * Mapping tables are used to map Unicode points to glyphs. They are sorted by
46 * code point, and vtfont_lookup() uses this to perform a binary search. Each
47 * font has four mapping tables: two weights times two halves (left/single,
48 * right). When a character is not present in a bold map the glyph from the
49 * normal map is used. When no glyph is available, it uses glyph 0, which is
50 * normally equal to U+FFFD.
51 */
52
53 enum vfnt_map_type {
54 VFNT_MAP_NORMAL = 0, /* Normal font. */
55 VFNT_MAP_NORMAL_RIGHT, /* Normal font right hand. */
56 VFNT_MAP_BOLD, /* Bold font. */
57 VFNT_MAP_BOLD_RIGHT, /* Bold font right hand. */
58 VFNT_MAPS /* Number of maps. */
59 };
60
61 struct font_info {
62 int32_t fi_checksum;
63 uint32_t fi_width;
64 uint32_t fi_height;
65 uint32_t fi_bitmap_size;
66 uint32_t fi_map_count[VFNT_MAPS];
67 };
68
69 struct vfnt_map {
70 uint32_t vfm_src;
71 uint16_t vfm_dst;
72 uint16_t vfm_len;
73 } __packed;
74 typedef struct vfnt_map vfnt_map_t;
75
76 struct vt_font {
77 vfnt_map_t *vf_map[VFNT_MAPS];
78 uint8_t *vf_bytes;
79 uint32_t vf_height;
80 uint32_t vf_width;
81 uint32_t vf_map_count[VFNT_MAPS];
82 uint32_t vf_refcount;
83 };
84
85 typedef struct vt_font_bitmap_data {
86 uint32_t vfbd_width;
87 uint32_t vfbd_height;
88 uint32_t vfbd_compressed_size;
89 uint32_t vfbd_uncompressed_size;
90 uint8_t *vfbd_compressed_data;
91 struct vt_font *vfbd_font;
92 } vt_font_bitmap_data_t;
93
94 typedef enum {
95 FONT_AUTO, /* This font is loaded by software */
96 FONT_MANUAL, /* This font is loaded manually by user */
97 FONT_BUILTIN, /* This font was built in at compile time */
98 FONT_RELOAD /* This font is marked to be re-read from file */
99 } FONT_FLAGS;
100
101 struct fontlist {
102 char *font_name;
103 FONT_FLAGS font_flags;
104 vt_font_bitmap_data_t *font_data;
105 vt_font_bitmap_data_t *(*font_load)(char *);
106 STAILQ_ENTRY(fontlist) font_next;
107 };
108
109 typedef STAILQ_HEAD(font_list, fontlist) font_list_t;
110
111 #define FONT_HEADER_MAGIC "VFNT0002"
112 struct font_header {
113 uint8_t fh_magic[8];
114 uint8_t fh_width;
115 uint8_t fh_height;
116 uint16_t fh_pad;
117 uint32_t fh_glyph_count;
118 uint32_t fh_map_count[VFNT_MAPS];
119 } __packed;
120
121 #endif /* !_SYS_FONT_H_ */
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