#ifndef _SCREEN_H_
#define _SCREEN_H_

#define SCR_COLS	80
#define SCR_ROWS	50
#define SCR_SIZE	(SCR_COLS*SCR_ROWS)

#define SCR_ID_MONITOR		256
#define SCR_ID_HELP		257
#define SCR_ID_OPTIONS		258
#define SCR_ID_PERIPHERALS	259
#define SCR_ID_IOX		260
#define SCR_ID_DRIVE		261

#define MAX_SCREENS	512

typedef struct {
	int type;
	int blink;
	int attr;

	struct {
		union {
			unsigned char linear[SCR_SIZE];
			unsigned char rowcol[SCR_ROWS][SCR_COLS];
		};
	} chars;

	struct {
		union {
			unsigned short linear[SCR_SIZE];
			unsigned short rowcol[SCR_ROWS][SCR_COLS];
		};
	} attributes;

	union {
		int col;
		int cx;
	};

	union {
		int row;
		int cy;

	};

} screenstruct;

screenstruct *screens[MAX_SCREENS];
screenstruct screencache;

unsigned int last_screen_type;

void initscreen();
void scrattrfill(int scr, unsigned short attr);
void scrclr(int scr);
screenstruct *openscreen(int scr);
void closescreen(int scr);
void shutdownscreen();
void displayscreen(int scr);
void scrxy(int scr, int x, int y);
void scrattr(int scr, unsigned short attr);
void scrblink(int scr, unsigned char blink);
void scrtype(int scr, unsigned char type);
void scrprintf(int scr, const char *fmt, ...);
void scrwindow(int scr, int x, int y, int sx, int sy, unsigned short attr, char *hdr);
void scrclone(int scr, int src);

#endif