101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/*
|
|
* font.h - font specific definitions
|
|
*
|
|
* Copyright (c) 2001 Lineo, Inc.
|
|
* Copyright (c) 2004 by Authors:
|
|
*
|
|
* Authors:
|
|
* MAD Martin Doering
|
|
*
|
|
* This file is distributed under the GPL, version 2 or at your
|
|
* option any later version. See doc/license.txt for details.
|
|
*/
|
|
|
|
#ifndef FONT_H
|
|
#define FONT_H
|
|
|
|
#include <stdint.h>
|
|
|
|
/* font header flags */
|
|
|
|
#define F_DEFAULT 1 /* this is the default font (face and size) */
|
|
#define F_HORZ_OFF 2 /* there are left and right offset tables */
|
|
#define F_STDFORM 4 /* is the font in standard format */
|
|
#define F_MONOSPACE 8 /* is the font monospaced */
|
|
|
|
/* font style bits */
|
|
|
|
#define F_THICKEN 1
|
|
#define F_LIGHT 2
|
|
#define F_SKEW 4
|
|
#define F_UNDER 8
|
|
#define F_OUTLINE 16
|
|
#define F_SHADOW 32
|
|
|
|
/* font specific linea variables */
|
|
|
|
extern const uint16_t *v_fnt_ad; /* address of current monospace font */
|
|
extern const uint16_t *v_off_ad; /* address of font offset table */
|
|
extern uint16_t v_fnt_nd; /* ascii code of last cell in font */
|
|
extern uint16_t v_fnt_st; /* ascii code of first cell in font */
|
|
extern uint16_t v_fnt_wr; /* font cell wrap */
|
|
|
|
/* character cell specific linea variables */
|
|
|
|
extern uint16_t v_cel_ht; /* cell height (width is 8) */
|
|
extern uint16_t v_cel_mx; /* needed by MiNT: columns on the screen minus 1 */
|
|
extern uint16_t v_cel_my; /* needed by MiNT: rows on the screen minus 1 */
|
|
extern uint16_t v_cel_wr; /* needed by MiNT: length (in int8_ts) of a line of characters */
|
|
|
|
/*
|
|
* font_ring is a struct of four pointers, each of which points to
|
|
* a list of font headers linked together to form a string.
|
|
*/
|
|
|
|
extern struct font_head *font_ring[4]; /* Ring of available fonts */
|
|
extern int16_t font_count; /* all three fonts and NULL */
|
|
|
|
/* the font header descibes a font */
|
|
|
|
struct font_head {
|
|
int16_t font_id;
|
|
int16_t point;
|
|
int8_t name[32];
|
|
uint16_t first_ade;
|
|
uint16_t last_ade;
|
|
uint16_t top;
|
|
uint16_t ascent;
|
|
uint16_t half;
|
|
uint16_t descent;
|
|
uint16_t bottom;
|
|
uint16_t max_char_width;
|
|
uint16_t max_cell_width;
|
|
uint16_t left_offset; /* amount character slants left when skewed */
|
|
uint16_t right_offset; /* amount character slants right */
|
|
uint16_t thicken; /* number of pixels to smear */
|
|
uint16_t ul_size; /* size of the underline */
|
|
uint16_t lighten; /* mask to and with to lighten */
|
|
uint16_t skew; /* mask for skewing */
|
|
uint16_t flags;
|
|
|
|
const uint8_t *hor_table; /* horizontal offsets */
|
|
const uint16_t *off_table; /* character offsets */
|
|
const uint16_t *dat_table; /* character definitions */
|
|
uint16_t form_width;
|
|
uint16_t form_height;
|
|
|
|
struct font_head *next_font;/* pointer to next font */
|
|
uint16_t font_seg;
|
|
};
|
|
|
|
|
|
|
|
/* prototypes */
|
|
|
|
void font_init(void); /* initialize BIOS font ring */
|
|
void font_set_default(void); /* choose the default font */
|
|
|
|
extern struct font_head *fnt;
|
|
|
|
#endif /* FONT_H */
|