Image flash

Richard Gaskin ambassador at fourthworld.com
Thu Dec 4 02:17:37 CST 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 FourthWorld.com       http://www.FourthWorld.com
 Tel: 323-225-3717                       AIM: FourthWorldInc



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