On Mon, 19 Jul 1999, Bobby Kolev wrote:
>
> Hello!
>
> How long does it take to refresh the display when the starting address is
> being changed (double buffering) in 2bpp mode? Do I have to wait manually or
> I could continue running the program? I tried the second, but I got some
> flickering.
if you are suggesting that you are manually changing the 'screen
address' in order to do the double buffering.. good question.. :>
this is a classic problem dating back to the old mode 13h days
on MSDOS :>
you need to wait for a vertical retrace.. how? good question. most
of my double buffering is done by writing to an offscreen buffer,
then using the WinCopyRectangle routine to update the screen.
no flickering there.. :(
> What is your experience?
have you tried WinCopyRectangle? (it is fast! - basically a BLTBLT)
:> i dont know how it will work with 2bpp tho..
your screen is twice the size then.. may take a bit longer..
az.
--
Aaron Ardiri
Lecturer http://www.hig.se/~ardiri/
University-College i G�vle mailto:[EMAIL PROTECTED]
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