Remove Orc Head

    private static class Pos {
        public int x, y; public Pos(int _x, int _y){x = _x; y = _y;}
    }
    private static Pos getStart(BufferedImage img, int x, int y){
        for(int y2=y; y2<y+TILE; y2++){
            for(int x2=x; x2<x+TILE; x2++) if(((img.getRGB(x2, y2)>>24)&0xFF) != 0) return new Pos(x2,y2);
        } return null;
    }
    private static void removeOrcHead(int i, BufferedImage img, BufferedImage ret, BufferedImage head) throws Exception {
        int x = (i%ROW_WIDTH)*TILE, y = (i/ROW_WIDTH)*TILE; Pos p=getStart(img,x,y), p2=getStart(head,0,0);
        if(p == null || p2 == null) return; p.x -= p2.x;
        int ex = p.x+head.getWidth(), ey=p.y+head.getHeight(); //System.out.println(x+" "+y+" "+p.x+" "+p.y+" "+ex+" "+ey);
        for(int y2=p.y; y2<ey; y2++){
            for(int x2=p.x; x2<ex; x2++){
                int c = head.getRGB(x2-p.x,y2-p.y); if(img.getRGB(x2, y2) == c){
                    img.setRGB(x2, y2, 0); ret.setRGB(x2, y2, c);
                }
            }
        }
    }
    private static BufferedImage flipH(BufferedImage img) throws Exception {
        int w = img.getWidth(), h = img.getHeight(); BufferedImage ret = new BufferedImage(w, h, img.getType());
        for(int y=0; y<h; y++){
            for(int x=0; x<w; x++){
                ret.setRGB(w-x-1, y, img.getRGB(x,y));
            }
        } return ret;
    }
    public static BufferedImage removeOrcHead(BufferedImage img) throws Exception {
        BufferedImage ret = new BufferedImage(img.getWidth(), img.getHeight(), img.getType());
        BufferedImage head = ImageIO.read(new File(FOLDER+"head/orc.png"));
        for(int f=9; f<18; f++) removeOrcHead(f,img, ret, head);
        for(int f=36; f<70; f++) removeOrcHead(f,img, ret, head);
        BufferedImage head2 = flipH(head); for(int f=27; f<36; f++) removeOrcHead(f,img, ret, head2);
        return ret;
    }