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_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");