On Thu, 24 Jun 1999, Bobby Kolev wrote:
>
> I've asked the same question several months ago and nobody did.
> Then, I read the display specification and I do not think it is possible as
> a quick patch - the screen can be flipped by the X axis relatively easy, but
> nothing about the Y axis.
>
> I was thinking of doing it as a hack, but after reviewing the pros and cons
> I thought it would be too hard and slow and canceled it.
>
> if you want to keep using the OS API and have it flipped, I guess the best
> place to do it is somewhere _inside_ ROM functions - as low as possible.
this would be the "tedious" way to do it.. but how about doing in your
software? just imagine all the ROM calls you would need to catch!? :(
- the best way would be for palm to have a routine called
Void WinFlipScreen(DirectionType direction)
but.. if you want to try it.. try this for a theoretical point of view:
use a backscreen image, and draw to it as normal, then.. when you
want to display it.. reverse the contents of the "pixel array".
(dont know how it will be affected based on display modes).. but
in theory.. it would work?
if you want to know how to do a backscreen image, then have a look
at the Cube3D source code located here:
http://www.hig.se/~ardiri/development/palmIII/index.html
i use gcc environment - but this should not matter for the double
buffering code.
cheers.
az.
--
Aaron Ardiri
Lecturer http://www.hig.se/~ardiri/
University-College i G�vle mailto:[EMAIL PROTECTED]
SE 801 76 G�vle SWEDEN
Tel: +46 26 64 87 38 Fax: +46 26 64 87 88
Mob: +46 70 352 8192 A/H: +46 26 10 16 11
