public DirectColorModel(ColorSpace cspace, int pixelBits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int transferType)
public DirectColorModel(int pixelBits, int rmask, int gmask, int bmask)
  public DirectColorModel(ColorSpace cspace, int pixelBits,			  int rmask, int gmask, int bmask, int amask,			  boolean isAlphaPremultiplied,			  int transferType)  {    super(cspace, pixelBits,	  rmask, gmask, bmask, amask, isAlphaPremultiplied,	  ((amask == 0) ? Transparency.OPAQUE : Transparency.TRANSLUCENT),	  transferType);	}