int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied,
int[] colorMaskArray, int alphaMask, boolean isAlphaPremultiplied,
  public PackedColorModel(ColorSpace cspace, int pixelBits,			  int rmask, int gmask, int bmask,			  int amask, boolean isAlphaPremultiplied,			  int transparency,			  int transferType)  {    this(cspace, pixelBits, makeColorMaskArray(rmask, gmask, bmask),	 amask, isAlphaPremultiplied, transparency, transferType);  }