Graphics interface sketch

Gfx.java

public interface Gfx {
  public int width();
  public int height();
  public void blit(Img img, int x, int y);
  public void line(Clr clr, int x1, int y1, int x2, int y2);
  public void rect(Clr clr, int x, int y, int w, int h);
}

public class Img {
  public String source;
  public int customWidth;
  public int customHeight;
  public double rotation;
  public Clr tint;
}

public class Clr {
  public int red, green, blue, alpha;
}