public class VertMirrorMapping extends PixelMapping
{
    
    int flip = 0;
    
    public VertMirrorMapping(ComplexImage ci, PixelMapping ne){super(ci,ne);}

    public void setOrigin(int x,int y)
    {
        ox=x;oy=y;
        flip = 0;
        if (next!=null) next.setOrigin(x,y);
    }
    public boolean morePixels()
        {
            //System.out.println("Pixelmapping: morePixels returns :"+startAgain);
            //return startAgain;
            if (flip!=2) return true;
            if (next!=null)
            {
                return next.morePixels();
            }
            else
            {
                return false;
            }
        }
    public PixelDesc nextPixel()
        {
            if (next == null)
            {
                System.out.println("never be called");
            }
            else
            {
                if (flip==2)
                {
                    if (next.morePixels())
                    {
                        flip = 0;
                    }
                    else
                    {
                        return null;
                    }
                }
                if (flip==0)
                {
                    flip = 1;
                    return next.nextPixel();
                    
                } else
                if (flip==1)
                {
                    flip = 2;
                    PixelDesc pd = next.nextPixel();
                    pd.y = complexImage.h - pd.y;
                    return(pd);
                }
                
            }
            return null;
        }
    
    
}