xref: /src/sys/dev/wsfont/wsfont.c

/* 	$NetBSD: wsfont.c,v 1.18.2.2 2001/06/21 20:06:37 nathanw Exp $	*/

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Doran.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wsfont.c,v 1.18.2.2 2001/06/21 20:06:37 nathanw Exp $");

#include "opt_wsfont.h"

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/malloc.h>

#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wsfont/wsfont.h>

#undef HAVE_FONT

#ifdef FONT_QVSS8x15
#define HAVE_FONT 1
#include <dev/wsfont/qvss8x15.h>
#endif

#ifdef FONT_GALLANT12x22
#define HAVE_FONT 1
#include <dev/wsfont/gallant12x22.h>
#endif

#ifdef FONT_LUCIDA16x29
#define HAVE_FONT 1
#include <dev/wsfont/lucida16x29.h>
#endif

#ifdef FONT_VT220L8x8
#define HAVE_FONT 1
#include <dev/wsfont/vt220l8x8.h>
#endif

#ifdef FONT_VT220L8x10
#define HAVE_FONT 1
#include <dev/wsfont/vt220l8x10.h>
#endif

#ifdef FONT_SONY8x16
#define HAVE_FONT 1
#include <dev/wsfont/sony8x16.h>
#endif

#ifdef FONT_SONY12x24
#define HAVE_FONT 1
#include <dev/wsfont/sony12x24.h>
#endif

#ifdef FONT_OMRON12x20
#define HAVE_FONT 1
#include <dev/wsfont/omron12x20.h>
#endif

/* Make sure we always have at least one font. */
#ifndef HAVE_FONT
#define HAVE_FONT 1
#define FONT_BOLD8x16 1
#endif

#ifdef FONT_BOLD8x16
#include <dev/wsfont/bold8x16.h>
#endif

/* Placeholder struct used for linked list */
struct font {
	struct	font *next;
	struct	font *prev;
	struct	wsdisplay_font *font;
	u_short	lockcount;
	u_short	cookie;
	u_short	flg;
};

/* Our list of built-in fonts */
static struct font *list, builtin_fonts[] = {
#ifdef FONT_BOLD8x16
	{ NULL, NULL, &bold8x16, 0, 1, WSFONT_STATIC | WSFONT_BUILTIN  },
#endif
#ifdef FONT_ISO8x16
	{ NULL, NULL, &iso8x16, 0, 2, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_COURIER11x18
	{ NULL, NULL, &courier11x18, 0, 3, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_GALLANT12x22
	{ NULL, NULL, &gallant12x22, 0, 4, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_LUCIDA16x29
	{ NULL, NULL, &lucida16x29, 0, 5, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_QVSS8x15
	{ NULL, NULL, &qvss8x15, 0, 6, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_VT220L8x8
	{ NULL, NULL, &vt220l8x8, 0, 7, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_VT220L8x10
	{ NULL, NULL, &vt220l8x10, 0, 8, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_SONY8x16
	{ NULL, NULL, &sony8x16, 0, 9, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_SONY12x24
	{ NULL, NULL, &sony12x24, 0, 10, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
#ifdef FONT_OMRON12x20
	{ NULL, NULL, &omron12x20, 0, 11, WSFONT_STATIC | WSFONT_BUILTIN },
#endif
	{ NULL, NULL, NULL, 0 },
};

/* Reverse the bit order in a byte */
static const u_char reverse[256] = {
	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
	0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
	0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
	0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
	0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
	0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
	0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
	0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
	0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
	0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
	0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
	0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
	0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
	0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
	0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
	0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
	0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
	0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
	0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
	0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
	0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
	0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
	0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
	0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
	0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
	0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
	0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};

static struct	font *wsfont_find0 __P((int));
static void	wsfont_revbit __P((struct wsdisplay_font *));
static void	wsfont_revbyte __P((struct wsdisplay_font *));

/*
 * Reverse the bit order of a font
 */
static void
wsfont_revbit(font)
	struct wsdisplay_font *font;
{
	u_char *p, *m;

	p = (u_char *)font->data;
	m = p + font->stride * font->numchars * font->fontheight;

	for (; p < m; p++)
		*p = reverse[*p];
}

/*
 * Reverse the byte order of a font
 */
static void
wsfont_revbyte(font)
	struct wsdisplay_font *font;
{
	int x, l, r, nr;
	u_char *rp;

	if (font->stride == 1)
		return;

	rp = (u_char *)font->data;
	nr = font->numchars * font->fontheight;

	while (nr--) {
		l = 0;
		r = font->stride - 1;

		while (l < r) {
			x = rp[l];
			rp[l] = rp[r];
			rp[r] = x;
			l++, r--;
		}

		rp += font->stride;
	}
}

/*
 * Enumarate the list of fonts
 */
void
wsfont_enum(cb)
	void (*cb) __P((char *, int, int, int));
{
	struct wsdisplay_font *f;
	struct font *ent;
	int s;

	s = splhigh();

	for (ent = list; ent; ent = ent->next) {
		f = ent->font;
		cb(f->name, f->fontwidth, f->fontheight, f->stride);
	}

	splx(s);
}

/*
 * Initialize list with WSFONT_BUILTIN fonts
 */
void
wsfont_init(void)
{
	static int again;
	int i;

	if (again != 0)
		return;
	again = 1;

	for (i = 0; builtin_fonts[i].font != NULL; i++) {
		builtin_fonts[i].next = list;
		list = &builtin_fonts[i];
	}
}

/*
 * Find a font by cookie. Called at splhigh.
 */
static struct font *
wsfont_find0(cookie)
	int cookie;
{
	struct font *ent;

	for (ent = list; ent != NULL; ent = ent->next)
		if (ent->cookie == cookie)
			return (ent);

	return (NULL);
}

/*
 * Find a font.
 */
int
wsfont_find(name, width, height, stride)
	char *name;
	int width, height, stride;
{
	struct font *ent;
	int s;

	s = splhigh();

	for (ent = list; ent != NULL; ent = ent->next) {
		if (height != 0 && ent->font->fontheight != height)
			continue;

		if (width != 0 && ent->font->fontwidth != width)
			continue;

		if (stride != 0 && ent->font->stride != stride)
			continue;

		if (name != NULL && strcmp(ent->font->name, name) != 0)
			continue;

		splx(s);
		return (ent->cookie);
	}

	splx(s);
	return (-1);
}

/*
 * Add a font to the list.
 */
#ifdef notyet
int
wsfont_add(font, copy)
	struct wsdisplay_font *font;
	int copy;
{
	static int cookiegen = 666;
	struct font *ent;
	size_t size;
	int s;

	s = splhigh();

	/* Don't allow exact duplicates */
	if (wsfont_find(font->name, font->fontwidth, font->fontheight,
	    font->stride) >= 0) {
		splx(s);
		return (-1);
	}

	MALLOC(ent, struct font *, sizeof *ent, M_DEVBUF, M_WAITOK);

	ent->lockcount = 0;
	ent->flg = 0;
	ent->cookie = cookiegen++;
	ent->next = list;
	ent->prev = NULL;

	/* Is this font statically allocated? */
	if (!copy) {
		ent->font = font;
		ent->flg = WSFONT_STATIC;
	} else {
		MALLOC(ent->font, struct wsdisplay_font *, sizeof *ent->font,
		    M_DEVBUF, M_WAITOK);
		memcpy(ent->font, font, sizeof(*ent->font));

		size = font->fontheight * font->numchars * font->stride;
		MALLOC(ent->font->data, void *, size, M_DEVBUF, M_WAITOK);
		memcpy(ent->font->data, font->data, size);
		ent->flg = 0;
	}

	/* Now link into the list and return */
	list = ent;
	splx(s);
	return (0);
}
#endif

/*
 * Remove a font.
 */
#ifdef notyet
int
wsfont_remove(cookie)
	int cookie;
{
	struct font *ent;
	int s;

	s = splhigh();

	if ((ent = wsfont_find0(cookie)) == NULL) {
		splx(s);
		return (-1);
	}

	if ((ent->flg & WSFONT_BUILTIN) != 0 || ent->lockcount != 0) {
		splx(s);
		return (-1);
	}

	/* Don't free statically allocated font data */
	if ((ent->flg & WSFONT_STATIC) != 0) {
		FREE(ent->font->data, M_DEVBUF);
		FREE(ent->font, M_DEVBUF);
	}

	/* Remove from list, free entry */
	if (ent->prev)
		ent->prev->next = ent->next;
	else
		list = ent->next;

	if (ent->next)
		ent->next->prev = ent->prev;

	FREE(ent, M_DEVBUF);
	splx(s);
	return (0);
}
#endif

/*
 * Lock a given font and return new lockcount. This fails if the cookie
 * is invalid, or if the font is already locked and the bit/byte order
 * requested by the caller differs.
 */
int
wsfont_lock(cookie, ptr, bitorder, byteorder)
	int cookie;
	struct wsdisplay_font **ptr;
	int bitorder, byteorder;
{
	struct font *ent;
	int s, lc;

	s = splhigh();

	if ((ent = wsfont_find0(cookie)) != NULL) {
		if (bitorder && bitorder != ent->font->bitorder) {
			if (ent->lockcount) {
				splx(s);
				return (-1);
			}
			wsfont_revbit(ent->font);
			ent->font->bitorder = bitorder;
		}

		if (byteorder && byteorder != ent->font->byteorder) {
			if (ent->lockcount) {
				splx(s);
				return (-1);
			}
			wsfont_revbyte(ent->font);
			ent->font->byteorder = byteorder;
		}

		lc = ++ent->lockcount;
		*ptr = ent->font;
	} else
		lc = -1;

	splx(s);
	return (lc);
}

/*
 * Get font flags and lockcount.
 */
int
wsfont_getflg(cookie, flg, lc)
	int cookie, *flg, *lc;
{
	struct font *ent;
	int s;

	s = splhigh();

	if ((ent = wsfont_find0(cookie)) != NULL) {
		*flg = ent->flg;
		*lc = ent->lockcount;
	}

	splx(s);
	return (ent != NULL ? 0 : -1);
}

/*
 * Unlock a given font and return new lockcount.
 */
int
wsfont_unlock(cookie)
	int cookie;
{
	struct font *ent;
	int s, lc;

	s = splhigh();

	if ((ent = wsfont_find0(cookie)) != NULL) {
		if (ent->lockcount == 0)
			panic("wsfont_unlock: font not locked\n");
		lc = --ent->lockcount;
	} else
		lc = -1;

	splx(s);
	return (lc);
}


/*
 * Unicode to font encoding mappings
 */

/*
 * To save memory, font encoding tables use a two level lookup.
 * First the high byte of the Unicode is used to lookup the level 2
 * table, then the low byte indexes that table.  Level 2 tables that are
 * not needed are omitted (NULL), and both level 1 and level 2 tables
 * have base and size attributes to keep their size down.
 */

struct wsfont_level1_glyphmap {
	struct wsfont_level2_glyphmap **level2;
	int base;	/* High byte for first level2 entry	*/
	int size;	/* Number of level2 entries		*/
};

struct wsfont_level2_glyphmap {
	int base;	/* Low byte for first character		*/
	int size;	/* Number of characters			*/
	void *chars;	/* Pointer to character number entries  */
	int width;	/* Size of each entry in bytes (1,2,4)  */
};

#define null16			\
	NULL, NULL, NULL, NULL,	\
	NULL, NULL, NULL, NULL,	\
	NULL, NULL, NULL, NULL,	\
	NULL, NULL, NULL, NULL

/*
 * IBM 437 maps
 */

static u_int8_t
ibm437_chars_0[] = {
	 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
	80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
	96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111,
	112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	255,173,155,156, 0, 157, 0,  0,  0,  0, 166,174,170, 0,  0,  0,
	 0, 241,253, 0,  0,  0,  0, 249, 0,  0, 167,175,172,171, 0, 168,
	 0,  0,  0,  0, 142,143,146,128, 0, 144, 0,  0,  0,  0,  0,  0,
	 0, 165, 0,  0,  0,  0, 153, 0,  0,  0,  0,  0, 154, 0,  0,  0,
	133,160,131, 0, 132,134,145,135,138,130,136,137,141,161,140,139,
	 0, 164,149,162,147, 0, 148,246, 0, 151,163,150,129, 0,  0, 152
},
ibm437_chars_1[] = {
	159
},
ibm437_chars_3[] = {
	226, 0,  0,  0,  0, 233, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	228, 0,  0, 232, 0,  0, 234, 0,  0,  0,  0,  0,  0,  0, 224,225,
	 0, 235,238, 0,  0,  0,  0,  0,  0, 230, 0,  0,  0, 227, 0,  0,
	229,231
},
ibm437_chars_32[] = {
	252, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0, 158
},
ibm437_chars_34[] = {
	237, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0, 248,250,251, 0,  0,  0, 236, 0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0, 239, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0, 247, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,240,  0,  0,243,
	242
},
ibm437_chars_35[] = {
	169, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	244,245
},
ibm437_chars_37[] = {
	196,205,179,186, 0,  0,  0,  0,  0,  0,  0,  0, 218,213,214,201,
	191,184,183,187,192,212,211,200,217,190,189,188,195,198, 0,  0,
	199, 0,  0, 204,180,181, 0,  0, 182, 0,  0, 185,194, 0,  0, 209,
	210, 0,  0, 203,193, 0,  0, 207,208, 0,  0, 202,197, 0,  0, 216,
	 0,  0, 215, 0,  0,  0,  0,  0,  0,  0,  0, 206, 0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	223, 0,  0,  0, 220, 0,  0,  0, 219, 0,  0,  0, 221, 0,  0,  0,
	222,176,177,178, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	254
};

static struct wsfont_level2_glyphmap
ibm437_level2_0 = { 0, 256, ibm437_chars_0, 1 },
ibm437_level2_1 = { 146, 1, ibm437_chars_1, 1 },
ibm437_level2_3 = { 147, 50, ibm437_chars_3, 1 },
ibm437_level2_32 = { 127, 41, ibm437_chars_32, 1 },
ibm437_level2_34 = { 5, 97, ibm437_chars_34, 1 },
ibm437_level2_35 = { 16, 18, ibm437_chars_35, 1 },
ibm437_level2_37 = { 0, 161, ibm437_chars_37, 1 };

static struct wsfont_level2_glyphmap *ibm437_level1[] = {
	&ibm437_level2_0, &ibm437_level2_1, NULL, &ibm437_level2_3,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	&ibm437_level2_32, NULL, &ibm437_level2_34, &ibm437_level2_35,
	NULL, &ibm437_level2_37
};


/*
 * ISO-8859-7 maps
 */

static u_int8_t
iso7_chars_0[] = {
	 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
	80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
	96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111,
	112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
	128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
	144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
	160, 0,  0, 163, 0,  0, 166,167,168,169, 0, 171,172,173, 0,  0,
	176,177,178,179,180, 0,  0, 183, 0,  0,  0, 187, 0, 189
},
iso7_chars_3[] = {
	182, 0, 184,185,186, 0, 188, 0, 190,191,192,193,194,195,196,197,
	198,199,200,201,202,203,204,205,206,207,208,209, 0, 211,212,213,
	214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,
	230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,
	246,247,248,249,250,251,252,253,254, 0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 181
},
iso7_chars_32[] = {
	175, 0,  0,  0,  0, 162, 0, 161
};

static struct wsfont_level2_glyphmap
iso7_level2_0 = { 0, 190, iso7_chars_0, 1 },
iso7_level2_3 = { 134, 111, iso7_chars_3, 1 },
iso7_level2_32 = { 20, 8, iso7_chars_32, 1 };

static struct wsfont_level2_glyphmap *iso7_level1[] = {
	&iso7_level2_0, NULL, NULL, &iso7_level2_3,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL,
	&iso7_level2_32
};

static struct wsfont_level1_glyphmap encodings[] = {
	{ NULL, 0, 0 },			/* WSDISPLAY_FONTENC_ISO */
	{ ibm437_level1, 0, 38 },	/* WSDISPLAY_FONTENC_IBM */
	{ NULL, 0, 0 },			/* WSDISPLAY_FONTENC_PCVT */
	{ iso7_level1, 0, 33 },		/* WSDISPLAY_FONTENC_ISO7 */
};

#define MAX_ENCODING (sizeof(encodings) / sizeof(encodings[0]))

/*
 * Remap Unicode character to glyph
 */
int
wsfont_map_unichar(font, c)
	struct wsdisplay_font *font;
	int c;
{
	if (font->encoding == WSDISPLAY_FONTENC_ISO) {

		return c;

	} else if (font->encoding < 0 || font->encoding > MAX_ENCODING) {

		return (-1);

	} else {

		int hi = (c >> 8), lo = c & 255;
		struct wsfont_level1_glyphmap *map1 =
			&encodings[font->encoding];

		if (hi >= map1->base && hi < map1->base + map1->size) {
			struct wsfont_level2_glyphmap *map2 =
			  map1->level2[hi - map1->base];

			if (map2 != NULL &&
			    lo >= map2->base && lo < map2->base + map2->size) {

			  	lo -= map2->base;

				switch(map2->width) {
				 case 1:
				   c = (((u_int8_t *)map2->chars)[lo]);
				   break;
				 case 2:
				   c = (((u_int16_t *)map2->chars)[lo]);
				   break;
				 case 4:
				   c = (((u_int32_t *)map2->chars)[lo]);
				   break;
				}

				if (c == 0 && lo != 0)
					return (-1);
				else
					return (c);

			} else {
				return (-1);
			}

		} else {
			return (-1);
		}

	}

}