Re: [Csgl-users] multi-monitor support

[<ll...@ga...>]

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