Re: [Csgl-users] multi-monitor support

[Jeff M. <jm...@ya...>]

I'll try it tomorrow.
Thanks. 

- Jeff

----- Original Message ----- 
From: <ll...@ga...>
To: "Jeff Ma" <jm...@ya...>
Cc: <csg...@li...>
Sent: Wednesday, April 09, 2003 8:04 PM
Subject: Re: [Csgl-users] multi-monitor support


> just a quick though ..
> what about doing the OpenGL drawing to a Bitmap, and then display the 
> bitmap (in an ImageBox ...) ?
> there is a sample showing how to draw to a bitmap here: 
> <csgl>/examples/CS/drawimage.cs
> 
> it's a bit slower than direct drawing though ...
> what do you think ?
> 
> On Thursday, April 10, 2003, at 11:26 AM, Jeff Ma wrote:
> 
> > I have one graphics card with two monitors.
> >
> > The problem is not related to csgl. It is OpenGL problem (thanks to 
> > Trent
> > M.)  OpenGL hw accelaration doesn't support multi-monitor. I tried Nehe
> > sample (C++/OGL), same problem: runs fine on 1st monitor, no update on 
> > 2nd
> > monitor. See opengl.org faq:
> > http://www.opengl.org/developers/faqs/technical/mswindows.htm#mswi0100.
> >
> > A software pixel format may solve this problem. But Microsoft's generic
> > pixel format also has bugs, it doens't draw correctly on child windows 
> > w/
> > double-buffer when resized, see
> > http://support.microsoft.com/default.aspx?scid=kb;EN-US;272222. Plus
> > software is slow.
> >
> > One promising solution is:
> > http://support.microsoft.com/default.aspx?scid=kb;EN-US;272221: OpenGL
> > renders to a DIB section (device-independent bitmap) and then blt to 
> > the
> > window. The GLDib example runs fine on my two monitors and hw 
> > accelerated. I
> > am not sure how difficult it is to add DIB support to Lloyd's code.
> >
> > Multi-monitor is very popular in the investment industry that I am 
> > writing
> > code for.
> >
> > Jeff Ma
>