#ifdef __STRICT_ANSI__

#define _BSD_SOURCE

#endif

#include <rfb/rfb.h>

#include <math.h>

static void initBackground(rfbScreenInfoPtr server)

{

  unsigned int i,j;

  for(i=0;i<server->width;i++)

    for(j=0;j<server->height;j++) {

      server->frameBuffer[(j*server->width+i)*4+0]=i&0xff;

      server->frameBuffer[(j*server->width+i)*4+1]=j&0xff;

      server->frameBuffer[(j*server->width+i)*4+2]=(i*j)&0xff;

    }

}

int main(int argc,char** argv)

{             

  int width=400,height=300,w=20,x,y;

  double r,phi=0;

  rfbScreenInfoPtr server=rfbGetScreen(&argc,argv,width,height,8,3,4);

  if(!server)

    return 0;

  server->frameBuffer=(char*)malloc(width*height*4);

  initBackground(server);

  server->deferUpdateTime=0;

  rfbInitServer(server);

  r=0;

  while(1) {

    if(r<=0) {

      initBackground(server);

      rfbMarkRectAsModified(server,0,0,width,height);

      r=0.43;

      phi=0;

    } else {

      r-=0.0001;

      phi+=0.02;

      if(phi>2*M_PI)

	phi-=2*M_PI;

    }

    x=width*(0.5+cos(phi)*r);

    y=height*(0.5+sin(phi)*r);

    if(x>=0 && y>=0 && x+w<=width && y+w<=height) {

      unsigned int dx=width*0.5*(1-cos(phi)*r)-x,

      		dy=height*0.5*(1-sin(phi)*r)-y;

      rfbDoCopyRect(server,x,y,x+w,y+w,-dx,-dy);

    }

    rfbProcessEvents(server,50000);

  }

  return(0);

}