/*
    drawing.h

    All Points Addressable (APA) mode drawing library.

    Drawing routines originally by Pascal Felber
    Legendary overhall by Jon Fuge <jonny@q-continuum.demon.co.uk>
    Commenting by Michael Hope

    Note that the standard text printf() and putchar() cannot be used
    in APA mode - use gprintf() and wrtchr() instead.
*/
#ifndef __DRAWING_H
#define __DRAWING_H

/* Size of the screen in pixels */
#define GRAPHICS_WIDTH	160
#define GRAPHICS_HEIGHT 144

/* Possible drawing modes */
#if ORIGINAL
	#define	SOLID	0x10		/* Overwrites the existing pixels */
	#define	OR	0x20		/* Performs a logical OR */
	#define	XOR	0x40		/* Performs a logical XOR */
	#define	AND	0x80		/* Performs a logical AND */
#else
	#define	SOLID	0x00		/* Overwrites the existing pixels */
	#define	OR	0x01		/* Performs a logical OR */
	#define	XOR	0x02		/* Performs a logical XOR */
	#define	AND	0x03		/* Performs a logical AND */
#endif

/* Possible drawing colours */
#define	WHITE	0
#define	LTGREY	1
#define	DKGREY	2
#define	BLACK	3

/* Possible fill styles for box() and circle() */
#define	M_NOFILL	0
#define	M_FILL		1

/* Possible values for signed_value in gprintln() and gprintn() */
#define SIGNED   1
#define UNSIGNED 0

#include <types.h>

/* Note:  all 
/* Print the string 'str' with no interpretation */
void
	gprint(char *str);

/* Print the long number 'number' in radix 'radix'.  signed_value should
   be set to SIGNED or UNSIGNED depending on whether the number is signed
   or not */
void
	gprintln(WORD number, BYTE radix, BYTE signed_value);

/* Print the number 'number' as in 'gprintln' */
void	
	gprintn(BYTE number, BYTE radix, BYTE signed_value);

/* Print the formatted string 'fmt' with arguments '...' */
BYTE	
	gprintf(char *fmt,...);

/* Old style plot - try plot_point() */
void
	plot(UBYTE x, UBYTE y, UBYTE colour, UBYTE mode);

/* Plot a point in the current drawing mode and colour at (x,y) */
void	
	plot_point(UBYTE x, UBYTE y);

/* I (MLH) have no idea what switch_data does... */
void
	switch_data(UBYTE x, UBYTE y, unsigned char *src, unsigned char *dst);

/* Ditto */
void	
	draw_image(unsigned char *data);

/* Draw a line in the current drawing mode and colour from (x1,y1) to (x2,y2) */
void	
	line(UBYTE x1, UBYTE y1, UBYTE x2, UBYTE y2);

/* Draw a box (rectangle) with corners (x1,y1) and (x2,y2) using fill mode
   'style' (one of NOFILL or FILL */
void	
	box(UBYTE x1, UBYTE y1, UBYTE x2, UBYTE y2, UBYTE style);

/* Draw a circle with centre at (x,y) and radius 'radius'.  'style' sets
   the fill mode */
void	
	circle(UBYTE x, UBYTE y, UBYTE radius, UBYTE style);

/* Returns the current colour of the pixel at (x,y) */
UBYTE	
	getpix(UBYTE x, UBYTE y);

/* Prints the character 'chr' in the default font at the current position */
void	
	wrtchr(char chr);

/* Sets the current text position to (x,y).  Note that x and y have units
   of cells (8 pixels) */
void
	gotogxy(UBYTE x, UBYTE y);

/* Set the current foreground colour (for pixels), background colour, and
   draw mode */
void	color(UBYTE forecolor, UBYTE backcolor, UBYTE mode);

#endif /* __DRAWING_H */