OpenQNX :: The QNX Community Portal

 Jul 25, 2008 - 04:00 PM
Google
  Web openqnx.com   
     Create an account Home · Submit News · QNX Forums · QNX Download · Search   
_
Main Menu
Who's Online
There are 22 unlogged users and 3 registered users online.

You can log-in or register for a user account here.
FAQ FAQ  •  Search Search  •  Register Register  •  Log in to check your private messages Log in to check your private messages
Log in Log in

Dual head monitor support
OpenQNX Forum Index » General » QNX Newsgroups » qnx.ddk
Post new topic   Reply to topic
View previous topic Printable version Log in to check your private messages View next topic
Author Message
Mike Gorchak
Post subject: Dual head monitor support  PostPosted: Feb 09, 2008 - 03:08 PM
Guest
Hello, All!

Documentation for the io-graphics noticed:
http://www.qnx.com/developers/docs/6.3.2/neutrino/utilities/i/io-graphics.html

When multiple displays are supported by a single device, the following
functions will only work on one display:
a.. PgSetDPMSMode()
b.. PgReadScreen()
c.. PgGetGraphicsHWCaps()
d.. PgGetVideoModeList()
e.. PgGetVideoModeInfo()
f.. PgSetVideoMode()
g.. PgGetVideoMode()
In addition, PdSetTargetDevice() may not work correctly, and video overlays
will probably only work on one display.

The last sentence is a half of the truth.

Driver does not got any clue where the second monitor is placed in the
photon coordinate space. For example, the first monitor is placed at "-1280"
x-axis displacement, while the second one is placed at zero x-axis
displacement. Another example, first monitor is placed at 0,0, the second at
0,-1024. How the graphics driver could guess where monitors are placed in
the photon coordinate space ? So there is no any "video overlays will
probably work on one display", it is possible to create such monitor layout,
that overlay will not work anymore. It is sad, when hardware supports four
simultenously outputs with a lot of features, but photon/gfddk API bounds
hardware support to one sticky output with minimum acceleration.

I've additional notice about dual-head monitor configuration. The second
monitor (video output) will use software cursor only, independent on the
hardware capabilities. Looks like concerning the problem described with
overlays.

Eclipse fails to run on dual head configuration. (last nail in the coffin)

Dual head monitor support for QNX is completely useless and needed just for
tick on paper.

With best regards, Mike Gorchak. E-mail: mike@malva.ua
 
   
Reply with quote Back to top
maschoen
Post subject: RE: Dual head monitor support  PostPosted: Feb 10, 2008 - 01:31 AM
QNX Master


Joined: Jun 25, 2003
Posts: 1045
It's too bad if QNX hasn't paid attention to this detail. It worked find on QNX 4, although there was a quirk or two. I recall that Photon 2.0 had support for direct video memory access for things like video, and I can see where getting that just right with dual monitors might be a challenge. Using two monitors for development is heaven. I have two system set up this way, and my QNX 6 system would be if I could get the bios on my development machine to recognize two PCI video cards at the same time.
 
 View user's profile Send private message Send e-mail Visit poster's website  
Reply with quote Back to top
Mario Charest
Post subject: Re: Dual head monitor support  PostPosted: Feb 11, 2008 - 04:53 PM
Guest
"Mike Gorchak" <mike@malva.ua> wrote in message
news:fokfb2$e2f$1@inn.qnx.com...
Quote:
Hello, All!

Documentation for the io-graphics noticed:
http://www.qnx.com/developers/docs/6.3.2/neutrino/utilities/i/io-graphics.html

When multiple displays are supported by a single device, the following
functions will only work on one display:
a.. PgSetDPMSMode()
b.. PgReadScreen()
c.. PgGetGraphicsHWCaps()
d.. PgGetVideoModeList()
e.. PgGetVideoModeInfo()
f.. PgSetVideoMode()
g.. PgGetVideoMode()
In addition, PdSetTargetDevice() may not work correctly, and video
overlays will probably only work on one display.

The last sentence is a half of the truth.

Driver does not got any clue where the second monitor is placed in the
photon coordinate space. For example, the first monitor is placed at
"-1280" x-axis displacement, while the second one is placed at zero x-axis
displacement. Another example, first monitor is placed at 0,0, the second
at 0,-1024. How the graphics driver could guess where monitors are placed
in the photon coordinate space ? So there is no any "video overlays will
probably work on one display", it is possible to create such monitor
layout, that overlay will not work anymore. It is sad, when hardware
supports four simultenously outputs with a lot of features, but
photon/gfddk API bounds hardware support to one sticky output with minimum
acceleration.

I've additional notice about dual-head monitor configuration. The second
monitor (video output) will use software cursor only, independent on the
hardware capabilities. Looks like concerning the problem described with
overlays.

Eclipse fails to run on dual head configuration. (last nail in the coffin)


You are running Eclipse on QNX ??? Oh my god ;)

Quote:
Dual head monitor support for QNX is completely useless and needed just
for tick on paper.

With best regards, Mike Gorchak. E-mail: mike@malva.ua
 
   
Reply with quote Back to top
evanh
Post subject: Re: Dual head monitor support  PostPosted: Feb 11, 2008 - 08:19 PM
QNX Master


Joined: Feb 01, 2003
Posts: 737
Mario Charest wrote:
Quote:
"Mike Gorchak" <mike@malva.ua> wrote in message
Eclipse fails to run on dual head configuration. (last nail in the coffin)


You are running Eclipse on QNX ??? Oh my god ;)


Only way to go! I wouldn't have been much interested in QNX if it wasn't also my desktop.


Evan
 
 View user's profile Send private message Visit poster's website  
Reply with quote Back to top
kwschumm
Post subject: Re: Dual head monitor support  PostPosted: Feb 12, 2008 - 02:05 AM
Senior Member


Joined: Sep 17, 2004
Posts: 211
"Evan Hillas" <evanh@clear.net.nz> wrote in message
news:foqa9q$eqi$1@inn.qnx.com...
Quote:
Mario Charest wrote:
"Mike Gorchak" <mike@malva.ua> wrote in message
Eclipse fails to run on dual head configuration. (last nail in the
coffin)


You are running Eclipse on QNX ??? Oh my god ;)


Only way to go! I wouldn't have been much interested in QNX if it wasn't
also my desktop.


I have to run Eclipse on Windows on my current contract but hope to get back
to command
line on QNX soon. I spend way too much time fighting Eclipse bugs, design
choices and design flaws.
 
 View user's profile Send private message  
Reply with quote Back to top
Mario Charest
Post subject: Re: Dual head monitor support  PostPosted: Feb 12, 2008 - 02:08 PM
Guest
"Evan Hillas" <evanh@clear.net.nz> wrote in message
news:foqa9q$eqi$1@inn.qnx.com...
Quote:
Mario Charest wrote:
"Mike Gorchak" <mike@malva.ua> wrote in message
Eclipse fails to run on dual head configuration. (last nail in the
coffin)


You are running Eclipse on QNX ??? Oh my god ;)


Only way to go! I wouldn't have been much interested in QNX if it wasn't
also my desktop.



It's just that Eclipse on QNX is one version behind and the difference
between the version is very very significant. And the Tau version is even
better.

Plus the JVM used by QNX is slower then the Windows one.

Personnaly I use a combination of Eclipse of Windows and command line option
( via Phindows ). I try to use the best of both world. Cause I don't
beleive that as much as they try that an IDE will give you the level of
control you can get via the power of makefiles and shell scripts ;-)

> Evan
 
   
Reply with quote Back to top
Q
Post subject: Re: Dual head monitor support  PostPosted: Feb 13, 2008 - 08:45 AM
Guest
Quote:
I have to run Eclipse on Windows on my current contract but hope to get
back to command
line on QNX soon. I spend way too much time fighting Eclipse bugs, design
choices and design flaws.

use free c/c++ editors:
- Microsoft Visual C++ Express Edition
- Programmer's Notepad
- ...
and create your own makefiles.

Eclipse sucks.
 
   
Reply with quote Back to top
Mike Gorchak
Post subject: Re: Dual head monitor support  PostPosted: Feb 13, 2008 - 02:37 PM
Guest
Hello, Mario!

Quote:
Eclipse fails to run on dual head configuration. (last nail in the
coffin)
MC> You are running Eclipse on QNX ??? Oh my god Wink


Sometimes Smile It's painful to use Eclipse while developing graphics driver :)

With best regards, Mike Gorchak. E-mail: mike@malva.ua
 
   
Reply with quote Back to top
Display posts from previous:     
Jump to:  
All times are GMT
Post new topic   Reply to topic
View previous topic Printable version Log in to check your private messages View next topic
 OpenQNX Forum Index » General » QNX Newsgroups »  qnx.ddk
Powered by PNphpBB2 © 2003-2007 The PNphpBB Group
Credits
All logos and trademarks in this site are property of their respective owners. The comments are property of their posters.
Powered by OpenQNX: The QNX Community Portal Site
QNX and the QNX logo are registered trademarks of QNX Software Systems.