/*
 * EffecTV - Realtime Digital Video Effector
 * Copyright (C) 2001-2003 FUKUCHI Kentaro
 *
 * cycleTV - no effect.
 * Written by clifford smith <nullset@dookie.net>
 *
 */

#include <stdlib.h>
#include <string.h>
#include "EffecTV.h"
#include "utils.h"

static int start(void);
static int stop(void);
static int draw(RGB32 *src, RGB32 *dst);

static char *effectname = "cycleTV";
static int state = 0;
static int roff,goff,boff; /* Offset values */

effect *cycleRegister()
{
	effect *entry;

	entry = (effect *)malloc(sizeof(effect));
	if(entry == NULL) return NULL;
	
	entry->name = effectname;
	entry->start = start;
	entry->stop = stop;
	entry->draw = draw;
	entry->event = NULL;

	return entry;
}

static int start()
{
	roff = goff = boff = 0;
	state = 1;
	return 0;
}

static int stop()
{
	state = 0;
	return 0;
}

#define NEWCOLOR(c,o) ((c+o)%230)
static int draw(RGB32 *src, RGB32 *dst)
{
  int i;
  
  roff += 1;
  goff += 3;        
  if (stretch)
    image_stretch_to_screen();
  
  boff += 7;
  for (i=0 ; i < video_area ; i++) {
    RGB32 t;
    t = *src++;
    *dst++ = RGB(NEWCOLOR(RED(t),roff),
	       NEWCOLOR(GREEN(t),goff),
	       NEWCOLOR(BLUE(t),boff));
  }

  return 0;
}