1/*
2 * `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
23static const struct font_desc *fonts[] = {
24#ifdef CONFIG_FONT_8x8
25 &font_vga_8x8,
26#endif
27#ifdef CONFIG_FONT_8x16
28 &font_vga_8x16,
29#endif
30#ifdef CONFIG_FONT_6x11
31 &font_vga_6x11,
32#endif
33#ifdef CONFIG_FONT_7x14
34 &font_7x14,
35#endif
36#ifdef CONFIG_FONT_SUN8x16
37 &font_sun_8x16,
38#endif
39#ifdef CONFIG_FONT_SUN12x22
40 &font_sun_12x22,
41#endif
42#ifdef CONFIG_FONT_10x18
43 &font_10x18,
44#endif
45#ifdef CONFIG_FONT_ACORN_8x8
46 &font_acorn_8x8,
47#endif
48#ifdef CONFIG_FONT_PEARL_8x8
49 &font_pearl_8x8,
50#endif
51#ifdef CONFIG_FONT_MINI_4x6
52 &font_mini_4x6,
53#endif
54#ifdef CONFIG_FONT_6x10
55 &font_6x10,
56#endif
57#ifdef CONFIG_FONT_TER10x18
58 &font_ter_10x18,
59#endif
60#ifdef CONFIG_FONT_TER16x32
61 &font_ter_16x32,
62#endif
63#ifdef CONFIG_FONT_6x8
64 &font_6x8,
65#endif
66};
67
68#define num_fonts ARRAY_SIZE(fonts)
69
70#ifdef NO_FONTS
71#error No fonts configured.
72#endif
73
74
75/**
76 * find_font - find a font
77 * @name: string name of a font
78 *
79 * Find a specified font with string name @name.
80 *
81 * Returns %NULL if no font found, or a pointer to the
82 * specified font.
83 *
84 */
85const struct font_desc *find_font(const char *name)
86{
87 unsigned int i;
88
89 BUILD_BUG_ON(!num_fonts);
90 for (i = 0; i < num_fonts; i++)
91 if (!strcmp(fonts[i]->name, name))
92 return fonts[i];
93 return NULL;
94}
95EXPORT_SYMBOL(find_font);
96
97
98/**
99 * get_default_font - get default font
100 * @xres: screen size of X
101 * @yres: screen size of Y
102 * @font_w: bit array of supported widths (1 - FB_MAX_BLIT_WIDTH)
103 * @font_h: bit array of supported heights (1 - FB_MAX_BLIT_HEIGHT)
104 *
105 * Get the default font for a specified screen size.
106 * Dimensions are in pixels.
107 *
108 * font_w or font_h being NULL means all values are supported.
109 *
110 * Returns %NULL if no font is found, or a pointer to the
111 * chosen font.
112 *
113 */
114const struct font_desc *get_default_font(int xres, int yres,
115 unsigned long *font_w,
116 unsigned long *font_h)
117{
118 int i, c, cc, res;
119 const struct font_desc *f, *g;
120
121 g = NULL;
122 cc = -10000;
123 for (i = 0; i < num_fonts; i++) {
124 f = fonts[i];
125 c = f->pref;
126#if defined(__mc68000__)
127#ifdef CONFIG_FONT_PEARL_8x8
128 if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
129 c = 100;
130#endif
131#ifdef CONFIG_FONT_6x11
132 if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
133 c = 100;
134#endif
135#endif
136 if ((yres < 400) == (f->height <= 8))
137 c += 1000;
138
139 /* prefer a bigger font for high resolution */
140 res = (xres / f->width) * (yres / f->height) / 1000;
141 if (res > 20)
142 c += 20 - res;
143
144 if ((!font_w || test_bit(f->width - 1, font_w)) &&
145 (!font_h || test_bit(f->height - 1, font_h)))
146 c += 1000;
147
148 if (c > cc) {
149 cc = c;
150 g = f;
151 }
152 }
153 return g;
154}
155EXPORT_SYMBOL(get_default_font);
156
157MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
158MODULE_DESCRIPTION("Console Fonts");
159MODULE_LICENSE("GPL");
160

source code of linux/lib/fonts/fonts.c