The DOUBLE BUFFER is a command that enable / disable the graphics programming
technique used to avoid screen flickering, which is especially noticeable in
animations and interactive graphics applications. It is especially useful in
8-bit computers, where graphics resources are limited.
Imagine having a screen and two areas of memory, called buffers, dedicated to
graphics. In the first the entire frame (the complete image) that we want
to display on the screen is drawn. While drawing in the first buffer,
the contents of the second buffer are displayed on the screen. Once the
drawing in the first buffer is complete, the two buffers are swapped:
the contents of the first buffer are copied to the second and displayed
on the screen, while the first buffer is emptied and prepared for the
next frame. This process is repeated continuously.
The command will enable this method, and screens will be swapped
if the SCREEN SWAP is used.
This instruction activates the technique only where available.
DOUBLE BUFFER [ON|OFF]
DOUBLE BUFFER ON
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DOUBLE BUFFER ↔ DbBf
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