Image flash

Richard Gaskin ambassador at
Thu Dec 4 03:17:37 EST 2003

David Squance wrote:

> Could you please explain what this means?  What is buffering w.r.t. windows
> and what's the difference from the user's perspective, buffered vs not?

"Buffering" refers to drawing the contents of a window into an offscreen
buffer before copying that buffer to the screen.

Without the buffer, objects are drawn directly into the window on screen,
with noticeable side-effects like "flashing" when the area occupied by an
image or control is erased and the new object is drawn.

With a buffer, this drawing takes place offscreen and is copied in one quick
move to the screen in its finished state, hence no flashing as individual
controls are drawn.

 Richard Gaskin 
 Fourth World Media Corporation
 Ambassador at
 Tel: 323-225-3717                       AIM: FourthWorldInc

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