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#ifdef CONFIG_FONT_6x8
 61	&font_6x8,
 62#endif
 63};
 64
 65#define num_fonts ARRAY_SIZE(fonts)
 66
 67#ifdef NO_FONTS
 68#error No fonts configured.
 69#endif
 70
 71
 72/**
 73 *	find_font - find a font
 74 *	@name: string name of a font
 75 *
 76 *	Find a specified font with string name @name.
 77 *
 78 *	Returns %NULL if no font found, or a pointer to the
 79 *	specified font.
 80 *
 81 */
 82const struct font_desc *find_font(const char *name)
 83{
 84	unsigned int i;
 85
 86	BUILD_BUG_ON(!num_fonts);
 87	for (i = 0; i < num_fonts; i++)
 88		if (!strcmp(fonts[i]->name, name))
 89			return fonts[i];
 90	return NULL;
 91}
 92EXPORT_SYMBOL(find_font);
 93
 94
 95/**
 96 *	get_default_font - get default font
 97 *	@xres: screen size of X
 98 *	@yres: screen size of Y
 99 *	@font_w: bit array of supported widths (1 - FB_MAX_BLIT_WIDTH)
100 *	@font_h: bit array of supported heights (1 - FB_MAX_BLIT_HEIGHT)
101 *
102 *	Get the default font for a specified screen size.
103 *	Dimensions are in pixels.
104 *
105 *	font_w or font_h being NULL means all values are supported.
106 *
107 *	Returns %NULL if no font is found, or a pointer to the
108 *	chosen font.
109 *
110 */
111const struct font_desc *get_default_font(int xres, int yres,
112					 unsigned long *font_w,
113					 unsigned long *font_h)
114{
115	int i, c, cc, res;
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		/* prefer a bigger font for high resolution */
137		res = (xres / f->width) * (yres / f->height) / 1000;
138		if (res > 20)
139			c += 20 - res;
140
141		if ((!font_w || test_bit(f->width - 1, font_w)) &&
142		    (!font_h || test_bit(f->height - 1, font_h)))
143			c += 1000;
144
145		if (c > cc) {
146			cc = c;
147			g = f;
148		}
149	}
150	return g;
151}
152EXPORT_SYMBOL(get_default_font);
153
154MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
155MODULE_DESCRIPTION("Console Fonts");
156MODULE_LICENSE("GPL");