/* prevent double includes */
#ifndef FasTAlpHa
#define FasTAlpHa

struct fa_coordinate
{
	int x, y;
};

/*
 *	A fa_rectangle includes the point denoted by [origin] but
 *	does not include [corner].
 */
struct fa_rectangle
{
	struct fa_coordinate origin;
	struct fa_coordinate corner;
};

/*
 *	fainfo structure is used by the fa[get|set]info() routines to
 *	determine and/or change display parameters.  It is extensible
 *	at the end of the current structure.  All fields are of type
 *	'int' to allow languages other than C to access the structure.
 */
struct fainfo
{
	struct fa_rectangle size;

	int capabilities;
	int enhancements;
	int defaultenhancements;
	int cursor;
	int fontcellheight;
	int fontcellwidth;
	int foregroundplanes;
	int backgroundplanes;

	/* 
	 * use up this variable when adding new fields.  Until this
	 * expansion space is gone, old object code will not need to be
	 * re-compiled.  When the structure actually requires more
	 * storage space, source code must be re-compiled.
	 */
	int ___expansion[20];
};

/*
 *	Enhancements can all be packed into an 8-bit quantity.  FastAlpha
 *	sometimes passes them as integers (for ease in interfacing to
 *	languages other than C) but defines the type, ENH, for use by
 *	fawrite();
 */
typedef char ENH;

/*
 *	These constants define the contents of the 'capabilities' field in
 *	the fainfo structure. The field is assumed to contain at least 16 bits.
 */

/*************BITS******************/
/*
 * Device is driven serially as via RS232.  
 */
#define	FASERIAL	0x1
/*
 * Display is actually a window
 */
#define	FAWINDOW	0x2
/*
 * Display is implemented on a built-in alpha plane aka 9836A
 */
#define	FAPLANE	0x4


/*
 *	Enhancement bit definitions.  They are pushed into the printable
 *	ASCII character set by adding the '@' symbol.
 */
#define	FAOFF		'@'+0x0
#define	FABLINK		'@'+0x1
#define	FAINVERSE	'@'+0x2
#define	FAUNDERLINE	'@'+0x4
#define	FAHALFBRIGHT	'@'+0x8

/*
 * 	Color bit definitions for multiple-plane systems
 */
#define FARED		0x1
#define FAGREEN		0x2
#define FABLUE		0x4

/*
 *	Roll directions
 */
#define FAROLLUP	'u'
#define FAROLLDOWN	'd'
#define	FAROLLLEFT	'l'
#define FAROLLRIGHT	'r'

/*
 *	Random
 */

/*
 * Invalid cursor coordinate
 */
#define	FACURSORNOMOVE	-1

#ifndef TRUE
#define TRUE	1
#endif  TRUE

#ifndef FALSE
#define FALSE	0
#endif  FALSE

#ifndef NULL
#define	NULL	0
#endif  NULL

#define FAENHANCE(fd,enhancement,rp)	farectwrite(fd,' ',enhancement,rp)