Using display calls on a headless device

Hi All,

if I create a headless device (NULL display driver), can
I compile and run applications that use display calls
(dialog etc)? I would suspect that these display driver
calls would be terminated at NULL display functions?

Anone know.

Cheers, Andrew

Gary
Fri Apr 02 00:31:26 CST 2004

Actually, the NULL display driver is a fully functioning display driver.

If you use the PB remote zoom-in tool, you'll retrieve the bitmap of what's
currently on the display. I believe it's a 4bpp display by default.

Gary Daniels
Windows CE GDI Test

This posting is provided "AS IS" with no warranties, and confers no rights.
You assume all risk for your use. © 2002 Microsoft Corporation. All rights
reserved.

"Andrew" <anonymous@discussions.microsoft.com> wrote in message
news:1733e01c4184a$c26b1260$a401280a@phx.gbl...
> Hi All,
>
> if I create a headless device (NULL display driver), can
> I compile and run applications that use display calls
> (dialog etc)? I would suspect that these display driver
> calls would be terminated at NULL display functions?
>
> Anone know.
>
> Cheers, Andrew

Oliver
Fri Apr 02 01:25:48 CST 2004

Hi Andrew,

if you want a 'headless device' because you don't have any graphic
controller you should built a display based device with a NULL display
driver. Because if you built a headless device (e.g. Gateway) you wouldn't
have any opinion to insert the NULL driver into your image.

Also the null driver has a display size from 320 x 200 and a gray scale
display. If you want to change the display size (cause you can work with
Remote Zoom-In and Remote Display Control) just change the resolution in
dispdrvr.c in public\common\oak\drivers\display\nopdisp. (Attention:
Normally you never should make any changes to the public\common\ sources, to
stay compatible to the rest of the world)

Best regards,
Oliver Münchow
--
---------------------------------------
Gesytec GmbH eMail:
52076 Aachen omuenchowATgesytecDOTde
http://www.gesytec.de


"Andrew" <anonymous@discussions.microsoft.com> schrieb im Newsbeitrag
news:1733e01c4184a$c26b1260$a401280a@phx.gbl...
> Hi All,
>
> if I create a headless device (NULL display driver), can
> I compile and run applications that use display calls
> (dialog etc)? I would suspect that these display driver
> calls would be terminated at NULL display functions?
>
> Anone know.
>
> Cheers, Andrew