/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright 2019 Toomas Soome <tsoome@me.com>
 */

#ifndef _SYS_FONT_H
#define	_SYS_FONT_H

#include <sys/queue.h>

#ifdef __cplusplus
extern "C" {
#endif

enum vfnt_map {
	VFNT_MAP_NORMAL = 0,	/* Normal font. */
	VFNT_MAP_NORMAL_RH,	/* Normal font right hand. */
	VFNT_MAP_BOLD,		/* Bold font. */
	VFNT_MAP_BOLD_RH,	/* Bold font right hand. */
	VFNT_MAPS		/* Number of maps. */
};

/*
 * If the custom console font was loaded, pass it for kernel as a module.
 * We do not just load the font file, as the font file needs to be processed,
 * and the early boot has very little resources. So we just set up the
 * needed structures and make a copy of the byte arrays.
 *
 * Note we cannot copy the structures one to one due to the pointer size,
 * so we record the data by using fixed size structure.
 */
struct font_info {
	int32_t fi_checksum;
	uint32_t fi_width;
	uint32_t fi_height;
	uint32_t fi_bitmap_size;
	uint32_t fi_map_count[VFNT_MAPS];
};

struct font_map {
	uint32_t font_src;	/* Source glyph. */
	uint16_t font_dst;	/* Target glyph. */
	uint16_t font_len;	/* The number of glyphs in sequence. */
};

/* Any unknown glyph is mapped as first (offset 0) glyph in bitmap. */
struct font {
	struct font_map	*vf_map[VFNT_MAPS];	/* Mapping tables. */
	uint8_t		*vf_bytes;		/* Font bitmap data. */
	uint32_t	vf_width;		/* Glyph width. */
	uint32_t	vf_height;		/* Glyph height. */
	uint32_t	vf_map_count[VFNT_MAPS];	/* Entries in map */
};

typedef	struct  bitmap_data {
	uint32_t	width;
	uint32_t	height;
	uint32_t	compressed_size;
	uint32_t	uncompressed_size;
	uint8_t		*compressed_data;
	struct font	*font;
} bitmap_data_t;

typedef enum {
	FONT_AUTO,	/* This font is loaded by software */
	FONT_MANUAL,	/* This font is loaded manually by user */
	FONT_BOOT,	/* This font was passed to kernel by bootloader */
	FONT_BUILTIN,	/* This font was built in at compile time */
	FONT_RELOAD	/* This font is marked to be re-read from file */
} FONT_FLAGS;

struct fontlist {
	char		*font_name;
	FONT_FLAGS	font_flags;
	bitmap_data_t	*font_data;
	bitmap_data_t   *(*font_load)(char *);
	STAILQ_ENTRY(fontlist) font_next;
};

#define	FONT_HEADER_MAGIC	"VFNT0002"
struct font_header {
	uint8_t		fh_magic[8];
	uint8_t		fh_width;
	uint8_t		fh_height;
	uint16_t	fh_pad;
	uint32_t	fh_glyph_count;
	uint32_t	fh_map_count[4];
} __attribute__((__packed__));

typedef STAILQ_HEAD(font_list, fontlist) font_list_t;
extern font_list_t fonts;

/*
 * Built in fonts. We are using Gallant as default on sparc to keep
 * smooth transition from prom and 8x16 on x86, for vga text mode.
 */
#ifdef sparc
#define	DEFAULT_FONT_DATA	font_data_12x22
extern bitmap_data_t font_data_12x22;
#else
#define	DEFAULT_FONT_DATA	font_data_8x16
extern bitmap_data_t font_data_8x16;
#endif
#define	BORDER_PIXELS		10	/* space from screen border */

void reset_font_flags(void);
bitmap_data_t *set_font(short *, short *, short, short);
const uint8_t *font_lookup(const struct font *, uint32_t);
void font_bit_to_pix4(struct font *, uint8_t *, uint32_t, uint32_t, uint32_t);
void font_bit_to_pix8(struct font *, uint8_t *, uint32_t, uint32_t, uint32_t);
void font_bit_to_pix16(struct font *, uint16_t *, uint32_t, uint32_t, uint32_t);
void font_bit_to_pix24(struct font *, uint8_t *, uint32_t, uint32_t, uint32_t);
void font_bit_to_pix32(struct font *, uint32_t *, uint32_t, uint32_t, uint32_t);

#ifdef __cplusplus
}
#endif

#endif /* !_SYS_FONT_H */