/**************************************************************
 * ENGINE.C - ViFONT ANIMATION DEMONSTRATION                  *
 *            CONTRIBUTED TO AT&T BY THE AMPERFAX CORPORATION *
 **************************************************************/
#include <stdio.h>
#include <sys/signal.h>
#include <sys/window.h>

main(argc,argv)
int argc;
char *argv[];
{
extern goodbye();
extern unsigned short ascii32[],ascii33[],ascii34[],ascii35[];
unsigned short *intake,*compression,*power,*exhaust;
static struct urdata picture;
int x,d,f;

  if(argc < 3)
  {
    printf("\33[2J\33[H\33[4mEngine Animation Demonstration\33[0m\n\n");
    printf("Usage: engine [frames] [delay]\n");
    printf("       frame values: 4, 8, 16, 32,...\n");
    printf("       delay values: 0=too fast  20000=nice  40000=good\n");
    exit(0);
  }

  f = atoi(argv[1]); /* Get number of frames */
  if(f < 0) f=0;
  d = atoi(argv[2]); /* Get number for delay */
  if(d < 0) d=0;

  /* Note to new developers:

     The UNIX PC counts argc from 1 to ...n, but argv[?] is counted from
     0 {program name} ....n
  */

  signal(SIGINT,goodbye);       /* Set DEL vector for quit   */
  printf("\33[=1C\33[2J\33[H"); /* Cursor Off - Clear Screen */
  printf("\t         \33[4mEngine Animation Demonstration\33[0m\n\n");
  printf("\tNumber of frames = %d / Delay between frames = %d\n\n",f,d);
  printf("\t     \33[7m Press [shift][Del] to exit anytime. \33[0m");

  intake      = ascii32;       /* This isn't necessary-aids readability*/
  compression = ascii33;
  power       = ascii34;
  exhaust     = ascii35;

  picture.ur_dstbase = 0;      /* Tell ioctl we are using this window  */
  picture.ur_dstwidth= 0;
  picture.ur_srcx    = 0;      /* Start taking the image from p(0,0)   */
  picture.ur_srcy    = 0;
  picture.ur_srcwidth= 10;     /* All images are 10 chars/row          */
  picture.ur_dstx    = 250;    /* Somewhere near middle of UNIX window */
  picture.ur_dsty    = 150;
  picture.ur_srcop   = SRCSRC; /* Load the original source image only  */
  picture.ur_dstop   = DSTSRC; /* Draw the original source image only  */
  picture.ur_pattern = 0;      /* Not using any pattern here           */
  picture.ur_width   = 70;     /* All images are 70 pixels wide        */
  picture.ur_height  = 50;     /* All images are 50 pixels high        */

  for(x=0; x<f; x++)
  {
    picture.ur_srcbase = intake; 	/* DRAW FRAME 1 */
    ioctl(0,WIOCRASTOP,&picture);
    delay(d);
    picture.ur_srcbase = compression; 	/* DRAW FRAME 2 */
    ioctl(0,WIOCRASTOP,&picture);
    delay(d);
    picture.ur_srcbase = power; 	/* DRAW FRAME 3 */
    ioctl(0,WIOCRASTOP,&picture);
    delay(d);
    picture.ur_srcbase = exhaust; 	/* DRAW FRAME 4 */
    ioctl(0,WIOCRASTOP,&picture);
    delay(d);
  }
  goodbye();
}

delay(amount) /* STRAIGHT COUNTER DELAY */
int amount;
{
  int cntr;
    for(cntr=0; cntr<amount; cntr++);
}

goodbye()
{
  printf("\33[=0C\n\n"); /* TURN ON THE CURSOR AND SAY GOODBYE */
  printf("\t    We hope you enjoyed this demonstration.\n");
  exit(0);
}