pyraf.gki.DrawBuffer:
implement a buffer for draw commands which allocates memory in
blocks so that a new memory allocation is not needed everytime
functions are appended
pyraf.gki.GkiBuffer:
implement a buffer for gki which allocates memory in blocks so that
a new memory allocation is not needed everytime metacode is
appended
pyraf.gki.GkiKernel:
Abstract class intended to be subclassed by implementations of GKI
kernels.
pyraf.gki.GkiReturnBuffer:
A fifo buffer used to queue up metacode to be returned to the IRAF
subprocess