#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#define GLOBAL
#include "global.h"
#include "fallbacks.h"

#include <X11/Intrinsic.h>

#include <X11/StringDefs.h> 
#include <X11/Intrinsic.h> 
#include <X11/Xaw/Box.h> 
#include <X11/Xaw/Toggle.h> 
#include <X11/Xaw/Command.h>


XtAppContext  app;


int infilefd;
const int ysize = 288 * 352;
const int usize = 144 * 176;
const int vsize = 144 * 176;
int horizontal_size, vertical_size;


u_char ycoeff[ysize];
u_char ucoeff[usize];
u_char vcoeff[vsize];

void exit_self(Widget w, XtPointer client, XtPointer call)
{
	/* Do all clean up */
	finish_display();
	XtAppSetExitFlag(app);
}


void ButtonCallbk(Widget wid, XtPointer client_data, XtPointer call_data)
{
	read(infilefd, ycoeff, ysize);
	read(infilefd, ucoeff, usize);
	if( read(infilefd, vcoeff, vsize) != vsize) {
		finish_display();
		XtAppSetExitFlag(app);
		return;
	}


	render_image(ycoeff, ucoeff, vcoeff, horizontal_size, vertical_size);
	display_image(True);
}
 


int main(int argc, char**argv)
{
	Widget toplevel,  drawingW, picW, formW, exitW;

	if( (infilefd = open(argv[1], O_RDONLY)) < 0) {
		perror("file open ");
		exit(0);
	}

    	toplevel = XtVaAppInitialize(&app, "RJPpicviewer", NULL, 0, &argc, argv,
    			       fallbacks, NULL);



	formW = XtCreateManagedWidget("box", boxWidgetClass, toplevel, NULL, 0);
	XtVaSetValues(formW, XtNheight, 320, NULL);
	XtVaSetValues(formW, XtNwidth,  400, NULL);


	drawingW = XtCreateManagedWidget("press and die",
					 toggleWidgetClass, formW, NULL, 0);

  	exitW = XtCreateManagedWidget("Exit", commandWidgetClass, formW, NULL, 0);
	
	
	picW = XtCreateManagedWidget("picw", coreWidgetClass, formW, NULL, 0);

	XtVaSetValues(picW, XtNheight, 300, NULL);
	XtVaSetValues(picW, XtNwidth, 375, NULL);
        XtAddCallback(drawingW,XtNcallback,ButtonCallbk , NULL);
	XtAddCallback(exitW, XtNcallback, exit_self, NULL);
//	XtAddEventHandler(picW, ExposureMask, FALSE, Redisplay, NULL);

        XtRealizeWidget(toplevel);

	horizontal_size = 352;
	vertical_size = 288;
	init_display(toplevel, picW, horizontal_size, vertical_size);

	read(infilefd, ycoeff, ysize);
	read(infilefd, ucoeff, usize);
	if( read(infilefd, vcoeff, vsize) != vsize) {
		fprintf(stderr, "read error");
	}
	render_image(ycoeff, ucoeff, vcoeff, horizontal_size, vertical_size);

  	XtAppMainLoop(app);
	return 0;
}