release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/video/console/fonts.c

   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
  25 static 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 };
  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  */
  85
  86 const struct font_desc *find_font(const char *name)
  87 {
  88    unsigned int i;
  89
  90    for (i = 0; i < num_fonts; i++)
  91       if (!strcmp(fonts[i]->name, name))
  92           return fonts[i];
  93    return NULL;
  94 }
  95
  96
  97 /**
  98  *      get_default_font - get default font
  99  *      @xres: screen size of X
 100  *      @yres: screen size of Y
 101  *      @font_w: bit array of supported widths (1 - 32)
 102  *      @font_h: bit array of supported heights (1 - 32)
 103  *
 104  *      Get the default font for a specified screen size.
 105  *      Dimensions are in pixels.
 106  *
 107  *      Returns %NULL if no font is found, or a pointer to the
 108  *      chosen font.
 109  *
 110  */
 111
 112 const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
 113                                          u32 font_h)
 114 {
 115     int i, c, cc;
 116     const struct font_desc *f, *g;
 117
 118     g = NULL;
 119     cc = -10000;
 120     for(i=0; i<num_fonts; i++) {
 121         f = fonts[i];
 122         c = f->pref;
 123 #if defined(__mc68000__)
 124 #ifdef CONFIG_FONT_PEARL_8x8
 125         if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
 126             c = 100;
 127 #endif
 128 #ifdef CONFIG_FONT_6x11
 129         if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
 130             c = 100;
 131 #endif
 132 #endif
 133         if ((yres < 400) == (f->height <= 8))
 134             c += 1000;
 135
 136         if ((font_w & (1 << (f->width - 1))) &&
 137             (font_h & (1 << (f->height - 1))))
 138             c += 1000;
 139
 140         if (c > cc) {
 141             cc = c;
 142             g = f;
 143         }
 144     }
 145     return g;
 146 }
 147
 148 EXPORT_SYMBOL(find_font);
 149 EXPORT_SYMBOL(get_default_font);
 150
 151 MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
 152 MODULE_DESCRIPTION("Console Fonts");
 153 MODULE_LICENSE("GPL");