// xgrp.h     MR Nov 00
// 
// Header file to 'xgrp.c'.


#ifndef _XGRP_H_
#define _XGRP_H_


#include <X11/Xlib.h> 
#include <X11/keysym.h>           // For XK_... key defines
#include <X11/extensions/Xdbe.h>  // For ''back buffer'' stuff



// --------------------------------------------------------------------------
//           graphics stuff part 1: COLORS
// --------------------------------------------------------------------------


// Global color pixel-values array (declared in 'xgrp.c'):
#define MAXCOLOR 16
extern long GLOB_colorpixel[MAXCOLOR];

// Indices in global color array:
#define CLR_BLACK 0
#define CLR_WHITE 1
#define CLR_GREY 2
#define CLR_RED 3
#define CLR_ORANGE 4
#define CLR_YELLOW 5
#define CLR_YELGR 6  // Yellow-Green
#define CLR_GREEN 7
#define CLR_CYAN 8
#define CLR_BLUE 9
#define CLR_PURPLE 10
#define CLR_LGREY 11
#define CLR_DGREY 12


void initcolors( Display * pD );
	// This function initializes the global array GLOB_colorpixel



// --------------------------------------------------------------------------
//           graphics stuff part 2: drawing lines etc. on the screen
// --------------------------------------------------------------------------


//
// Funcs & structs for use inside 'drawMyPicture()' :
//

typedef struct 
	{ 
	Display * pD; 
	Drawable d; 
	GC gc; 

	//Size of window (values must be managed externally of grp_... funcs):
	int ourScreenWidth; 
	int ourScreenHeight;
	} 
	grp_t;


void grp_makenew( grp_t * pgrp,
	Display * pD, 
	Drawable d );
	//Fill *pgrp struct with values for Display 'pD', Drawable 'd'
	// and with a newly allocated and initialized ''GC'' with suitable 
	// default settings.

void grp_delete( grp_t * pgrp );


void grp_setoperation( grp_t * pgrp,
	int function ); // One of the GX... defines (e.g. XGset, XGclear)
void grp_setcolor( grp_t * pgrp,
	long pm_color );  //One of the PM_... defines
void grp_setlinewidth( grp_t * pgrp,
	int linewidth );


void grp_drawline( grp_t * pgrp,
	int x0, int y0, 
	int x1, int y1 );
void grp_paintline( grp_t * pgrp,
	int x0, int y0, 
	int x1, int y1,
	long color ); // First clear, then draw


void grp_drawcircle( grp_t * pgrp,
	int x, int y, int radius );
void grp_fillcircle( grp_t * pgrp,
	int x, int y, int radius );
void grp_paintcircle( grp_t * pgrp,
	int x, int y, int radius,
	long color );  // First clear, then fill




void grp_fillrect( grp_t * pgrp,
	int x, int y, int width, int height );
void grp_paintrect( grp_t * pgrp,
	int x, int y, int width, int height,
	long color );  // First clear, then fill



void grp_paintbox( grp_t * pgrp,
	int x, int y, int radius,
	long color );  //Draw an outlined (not filled) box 




// --------------------------------------------------------------------------
//           graphics stuff parts 3-4: drawing TEXT on the screen
// --------------------------------------------------------------------------


void grp_putchar( grp_t * pgrp, unsigned char c, int x, int y );

#include <stdarg.h>

#define CHARWID 6
#define CHARHI 12
void grp_strvprintf( grp_t * pgrp, 
	int x, int y, 
	long color, 
	const char * pFormat, va_list valist );
void grp_strprintf( grp_t * pgrp, 
	int x, int y,
	long color, 
	const char * pFormat, ... );



#endif // _XGRP_H_