lib/fonts/fonts.c

0001 /*
0002  * `Soft' font definitions
0003  *
0004  *    Created 1995 by Geert Uytterhoeven
0005  *    Rewritten 1998 by Martin Mares <mj@ucw.cz>
0006  *
0007  *  2001 - Documented with DocBook
0008  *  - Brad Douglas <brad@neruo.com>
0009  *
0010  * This file is subject to the terms and conditions of the GNU General Public
0011  * License.  See the file COPYING in the main directory of this archive
0012  * for more details.
0013  */
0014
0015 #include <linux/module.h>
0016 #include <linux/types.h>
0017 #include <linux/string.h>
0018 #if defined(__mc68000__)
0019 #include <asm/setup.h>
0020 #endif
0021 #include <linux/font.h>
0022
0023 static const struct font_desc *fonts[] = {
0024 #ifdef CONFIG_FONT_8x8
0025     &font_vga_8x8,
0026 #endif
0027 #ifdef CONFIG_FONT_8x16
0028     &font_vga_8x16,
0029 #endif
0030 #ifdef CONFIG_FONT_6x11
0031     &font_vga_6x11,
0032 #endif
0033 #ifdef CONFIG_FONT_7x14
0034     &font_7x14,
0035 #endif
0036 #ifdef CONFIG_FONT_SUN8x16
0037     &font_sun_8x16,
0038 #endif
0039 #ifdef CONFIG_FONT_SUN12x22
0040     &font_sun_12x22,
0041 #endif
0042 #ifdef CONFIG_FONT_10x18
0043     &font_10x18,
0044 #endif
0045 #ifdef CONFIG_FONT_ACORN_8x8
0046     &font_acorn_8x8,
0047 #endif
0048 #ifdef CONFIG_FONT_PEARL_8x8
0049     &font_pearl_8x8,
0050 #endif
0051 #ifdef CONFIG_FONT_MINI_4x6
0052     &font_mini_4x6,
0053 #endif
0054 #ifdef CONFIG_FONT_6x10
0055     &font_6x10,
0056 #endif
0057 #ifdef CONFIG_FONT_TER16x32
0058     &font_ter_16x32,
0059 #endif
0060 #ifdef CONFIG_FONT_6x8
0061     &font_6x8,
0062 #endif
0063 };
0064
0065 #define num_fonts ARRAY_SIZE(fonts)
0066
0067 #ifdef NO_FONTS
0068 #error No fonts configured.
0069 #endif
0070
0071
0072 /**
0073  *  find_font - find a font
0074  *  @name: string name of a font
0075  *
0076  *  Find a specified font with string name @name.
0077  *
0078  *  Returns %NULL if no font found, or a pointer to the
0079  *  specified font.
0080  *
0081  */
0082 const struct font_desc *find_font(const char *name)
0083 {
0084     unsigned int i;
0085
0086     BUILD_BUG_ON(!num_fonts);
0087     for (i = 0; i < num_fonts; i++)
0088         if (!strcmp(fonts[i]->name, name))
0089             return fonts[i];
0090     return NULL;
0091 }
0092 EXPORT_SYMBOL(find_font);
0093
0094
0095 /**
0096  *  get_default_font - get default font
0097  *  @xres: screen size of X
0098  *  @yres: screen size of Y
0099  *      @font_w: bit array of supported widths (1 - 32)
0100  *      @font_h: bit array of supported heights (1 - 32)
0101  *
0102  *  Get the default font for a specified screen size.
0103  *  Dimensions are in pixels.
0104  *
0105  *  Returns %NULL if no font is found, or a pointer to the
0106  *  chosen font.
0107  *
0108  */
0109 const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
0110                      u32 font_h)
0111 {
0112     int i, c, cc, res;
0113     const struct font_desc *f, *g;
0114
0115     g = NULL;
0116     cc = -10000;
0117     for (i = 0; i < num_fonts; i++) {
0118         f = fonts[i];
0119         c = f->pref;
0120 #if defined(__mc68000__)
0121 #ifdef CONFIG_FONT_PEARL_8x8
0122         if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
0123             c = 100;
0124 #endif
0125 #ifdef CONFIG_FONT_6x11
0126         if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
0127             c = 100;
0128 #endif
0129 #endif
0130         if ((yres < 400) == (f->height <= 8))
0131             c += 1000;
0132
0133         /* prefer a bigger font for high resolution */
0134         res = (xres / f->width) * (yres / f->height) / 1000;
0135         if (res > 20)
0136             c += 20 - res;
0137
0138         if ((font_w & (1 << (f->width - 1))) &&
0139             (font_h & (1 << (f->height - 1))))
0140             c += 1000;
0141
0142         if (c > cc) {
0143             cc = c;
0144             g = f;
0145         }
0146     }
0147     return g;
0148 }
0149 EXPORT_SYMBOL(get_default_font);
0150
0151 MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
0152 MODULE_DESCRIPTION("Console Fonts");
0153 MODULE_LICENSE("GPL");