The
following buffer numbers are reserved for blitting to the screen.
DIVE_BUFFER_SCREEN
Results in the image being transferred
to either the graphics plane buffer or the alternate plane buffer, based
on whether an alternate buffer exists and the suitability of the overlay
plane to accelerate the scaling of the image. If DIVE chooses to use the
alternate buffer, it will also paint the overlay "key" color on the graphics
plane. This automatic painting does not occur if the alternate plane is
explicitly specified.
DIVE_BUFFER_GRAPHICS_PLANE
Results in the image being transferred to the graphics
plane.
DIVE_BUFFER_ALTERNATE_PLANE
Results
in the image being transferred to the alternate (for example, overlay) plane.
If your hardware does not support such a plane, this is an error.