Using offscreen video memory to store source graphics for VBE/AF.
This program demonstrates how to use an offscreen part of
the video memory to store source graphics for a hardware
accelerated graphics driver. The example loads the `mysha.pcx'
file and then blits it several times on the screen. Depending
on whether you have enough video memory and Allegro supports
the hardware acceleration features of your card, your success
running this example may be none at all, sluggish performance
due to software emulation, or flicker free smooth hardware