/*
**
**	This is the header file for program newsample.c
**
**
*/

#define RANDOM(M) (int) ((float)rand()/RAND_MAX*(M));
#define TRUE 1
#define FALSE 0

typedef struct pixel {	/* structure for linked list of sampled points */
	int   x;	/* Coords X and Y */
	int   y;
	short red;	/* Colour RGB */
	short green;
	short blue;
	struct pixel *next; /* link list pointer */
} dot;

typedef struct RGBpixel { 		/* structure for 2D array */
	short red;
	short green;
	short blue;
} colorPixel;

typedef colorPixel *colorPixelArray;	/* pointer to pixel */

struct globstruct {
	colorPixel** theImage;		/* 2D dyn array */
	int xSize;			/* size of window */
	int ySize;
	int numPtsAdded;		/* number of sampled points */
	dot* head;			/* head & tail of sampled pt list */
	dot* tail;
};

struct globstruct global = {NULL, 200, 200, 0, NULL, NULL};

/* FUNCTION PROTOTYPES */


int check_duplicates(int x, int y);
void store_points(int x, int y, int red, int grn, int blue);
void add_point(dot *newPoint);
void read_samples(void);
void writeout(void);
void display(void);
void procInputData(int argc, char** argv);
void dumpCommands(void);
void plot_previous_points(void);
void keyboard(unsigned char key, int x, int y);
void reshape(int x, int y);