offscreen context - physical address

QNX Newsgroups (Archives) qdn.public.qnxrtp.photon
1

Hi,

is it possible to retrieve more information about a photon offscreen context?

We need the physical memory address and the line pitch, so we can instruct some hardware to write to this area.

TIA
Peter Stoeckigt

STN Atlas Marine Electronics GmbH
Dipl.-Ing. Peter Stoeckigt
Department MST21
Bremen, Germany
Phone: +49 (421) 457-1190
Fax: +49 421 457 2026
http://www.sam-electronics.de

2

Hi Peter,

I spoke with one of the developers and here is the information your
looking for:

You can get the Pitch from the offscreen context structure:

osc->pitch

a physical address from the pointer can be gotten from mem_offset()

Hope this helps
Regards
Brenda



Peter Stöckigt wrote:

Hi,

is it possible to retrieve more information about a photon offscreen context?

We need the physical memory address and the line pitch, so we can instruct some hardware to write to this area.

TIA
Peter Stoeckigt

STN Atlas Marine Electronics GmbH
Dipl.-Ing. Peter Stoeckigt
Department MST21
Bremen, Germany
Phone: +49 (421) 457-1190
Fax: +49 421 457 2026
http://www.sam-electronics.de