List of all members.
number of buffers to be allocated
number of rows to transfer if less than each buffer's height. All buffers must be the same size.
number of pixels/row to transfer if less than each buffer's width. All buffers must be the same size.
Offset in pixels to the first pixel per row.
Offset in rows to the row to transfer.
Array of pointers to writable image buffers
Array of pointers to each buffer's status