LXR linux/lib/fonts/fonts.c

   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_TER16x32
  58        &font_ter_16x32,
  59#endif
  60};
  61
  62#define num_fonts ARRAY_SIZE(fonts)
  63
  64#ifdef NO_FONTS
  65#error No fonts configured.
  66#endif
  67
  68
  69/**
  70 *      find_font - find a font
  71 *      @name: string name of a font
  72 *
  73 *      Find a specified font with string name @name.
  74 *
  75 *      Returns %NULL if no font found, or a pointer to the
  76 *      specified font.
  77 *
  78 */
  79const struct font_desc *find_font(const char *name)
  80{
  81        unsigned int i;
  82
  83        BUILD_BUG_ON(!num_fonts);
  84        for (i = 0; i < num_fonts; i++)
  85                if (!strcmp(fonts[i]->name, name))
  86                        return fonts[i];
  87        return NULL;
  88}
  89EXPORT_SYMBOL(find_font);
  90
  91
  92/**
  93 *      get_default_font - get default font
  94 *      @xres: screen size of X
  95 *      @yres: screen size of Y
  96 *      @font_w: bit array of supported widths (1 - 32)
  97 *      @font_h: bit array of supported heights (1 - 32)
  98 *
  99 *      Get the default font for a specified screen size.
 100 *      Dimensions are in pixels.
 101 *
 102 *      Returns %NULL if no font is found, or a pointer to the
 103 *      chosen font.
 104 *
 105 */
 106const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
 107                                         u32 font_h)
 108{
 109        int i, c, cc, res;
 110        const struct font_desc *f, *g;
 111
 112        g = NULL;
 113        cc = -10000;
 114        for (i = 0; i < num_fonts; i++) {
 115                f = fonts[i];
 116                c = f->pref;
 117#if defined(__mc68000__)
 118#ifdef CONFIG_FONT_PEARL_8x8
 119                if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
 120                        c = 100;
 121#endif
 122#ifdef CONFIG_FONT_6x11
 123                if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
 124                        c = 100;
 125#endif
 126#endif
 127                if ((yres < 400) == (f->height <= 8))
 128                        c += 1000;
 129
 130                /* prefer a bigger font for high resolution */
 131                res = (xres / f->width) * (yres / f->height) / 1000;
 132                if (res > 20)
 133                        c += 20 - res;
 134
 135                if ((font_w & (1 << (f->width - 1))) &&
 136                    (font_h & (1 << (f->height - 1))))
 137                        c += 1000;
 138
 139                if (c > cc) {
 140                        cc = c;
 141                        g = f;
 142                }
 143        }
 144        return g;
 145}
 146EXPORT_SYMBOL(get_default_font);
 147
 148MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
 149MODULE_DESCRIPTION("Console Fonts");
 150MODULE_LICENSE("GPL");
 151