xels from<DD><CODE>x</CODE> - the x coordinate of the upper left corner of the rectangle
 of pixels to retrieve from the image, relative to the default
 (unscaled) size of the image<DD><CODE>y</CODE> - the y coordinate of the upper left corner of the rectangle
 of pixels to retrieve from the image<DD><CODE>w</CODE> - the width of the rectangle of pixels to retrieve<DD><CODE>h</CODE> - the height of the rectangle of pixels to retrieve<DD><CODE>pix</CODE> - the array of integers which are to be used to hold t