operations throughout.
   Leptonica is also explicitly configured to work on both little-endian
   and big-endian hardware.  RGB image pixels are always stored
   in 32-bit words, and a few special functions are provided for
   scaling and rotation of RGB images that have been optimized by
   making explicit assumptions about the location of the R, G and B
   components in the 32-bit pixel.  In such cases, the restriction
   is documented in the function header.  The in-memory data structure
   used through