Root/drivers/video/console/fonts.c

Source at commit b13e7eb172b6f08e5fc22da162bdde5fcde201b5 created 8 years 7 months ago.
By Maarten ter Huurne, fbcon: Add 6x10 font
1/*
2 * linux/drivers/video/fonts.c -- `Soft' font definitions
3 *
4 * Created 1995 by Geert Uytterhoeven
5 * Rewritten 1998 by Martin Mares <mj@ucw.cz>
6 *
7 * 2001 - Documented with DocBook
8 * - Brad Douglas <brad@neruo.com>
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive
12 * for more details.
13 */
14
15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/string.h>
18#if defined(__mc68000__)
19#include <asm/setup.h>
20#endif
21#include <linux/font.h>
22
23#define NO_FONTS
24
25static const struct font_desc *fonts[] = {
26#ifdef CONFIG_FONT_8x8
27#undef NO_FONTS
28    &font_vga_8x8,
29#endif
30#ifdef CONFIG_FONT_8x16
31#undef NO_FONTS
32    &font_vga_8x16,
33#endif
34#ifdef CONFIG_FONT_6x11
35#undef NO_FONTS
36    &font_vga_6x11,
37#endif
38#ifdef CONFIG_FONT_7x14
39#undef NO_FONTS
40    &font_7x14,
41#endif
42#ifdef CONFIG_FONT_SUN8x16
43#undef NO_FONTS
44    &font_sun_8x16,
45#endif
46#ifdef CONFIG_FONT_SUN12x22
47#undef NO_FONTS
48    &font_sun_12x22,
49#endif
50#ifdef CONFIG_FONT_10x18
51#undef NO_FONTS
52    &font_10x18,
53#endif
54#ifdef CONFIG_FONT_ACORN_8x8
55#undef NO_FONTS
56    &font_acorn_8x8,
57#endif
58#ifdef CONFIG_FONT_PEARL_8x8
59#undef NO_FONTS
60    &font_pearl_8x8,
61#endif
62#ifdef CONFIG_FONT_MINI_4x6
63#undef NO_FONTS
64    &font_mini_4x6,
65#endif
66#ifdef CONFIG_FONT_6x10
67#undef NO_FONTS
68    &font_6x10,
69#endif
70};
71
72#define num_fonts ARRAY_SIZE(fonts)
73
74#ifdef NO_FONTS
75#error No fonts configured.
76#endif
77
78
79/**
80 * find_font - find a font
81 * @name: string name of a font
82 *
83 * Find a specified font with string name @name.
84 *
85 * Returns %NULL if no font found, or a pointer to the
86 * specified font.
87 *
88 */
89
90const struct font_desc *find_font(const char *name)
91{
92   unsigned int i;
93
94   for (i = 0; i < num_fonts; i++)
95      if (!strcmp(fonts[i]->name, name))
96      return fonts[i];
97   return NULL;
98}
99
100
101/**
102 * get_default_font - get default font
103 * @xres: screen size of X
104 * @yres: screen size of Y
105 * @font_w: bit array of supported widths (1 - 32)
106 * @font_h: bit array of supported heights (1 - 32)
107 *
108 * Get the default font for a specified screen size.
109 * Dimensions are in pixels.
110 *
111 * Returns %NULL if no font is found, or a pointer to the
112 * chosen font.
113 *
114 */
115
116const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
117                     u32 font_h)
118{
119    int i, c, cc;
120    const struct font_desc *f, *g;
121
122    g = NULL;
123    cc = -10000;
124    for(i=0; i<num_fonts; i++) {
125    f = fonts[i];
126    c = f->pref;
127#if defined(__mc68000__)
128#ifdef CONFIG_FONT_PEARL_8x8
129    if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
130        c = 100;
131#endif
132#ifdef CONFIG_FONT_6x11
133    if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
134        c = 100;
135#endif
136#endif
137    if ((yres < 400) == (f->height <= 8))
138        c += 1000;
139
140    if ((font_w & (1 << (f->width - 1))) &&
141        (font_h & (1 << (f->height - 1))))
142        c += 1000;
143
144    if (c > cc) {
145        cc = c;
146        g = f;
147    }
148    }
149    return g;
150}
151
152EXPORT_SYMBOL(find_font);
153EXPORT_SYMBOL(get_default_font);
154
155MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
156MODULE_DESCRIPTION("Console Fonts");
157MODULE_LICENSE("GPL");
158

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