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Re: Nvidia 6800 Ultra and 30" monitors.



Atul,

I've seen the same thing. As soon as you stretch the viewport past 4K, it goes blank. Expected, given that the result of Shaun's suggestion is 4096 x 4096. My advice it to mount the two monitors vertically. (:

Laurence

P.S.  Alex Eddy posted a great table of card/gl info yesterday:

		http://homepage.mac.com/arekkusu/bugs/GLInfo.html


Laurence Flath, Ph.D. Lawrence Livermore National Laboratory P.O. Box 808, L-183 Livermore, CA 94551

Phone: 925-424-6424
Fax:   925-422-2499
email: email@hidden


On Nov 10, 2004, at 6:42 PM, Shaun Wexler wrote:

On Nov 10, 2004, at 6:23 PM, Atul Nayak wrote:

I have a new G5 with the Nvidia 6800 card and two 30" monitors attached to
the machine. I am trying to open an OpenGL window that can span both the
monitors (each is set at 2560 x 1600 ). Does anyone know if that can be done
with this card ?


Most of my glut code calls glutFullScreen() for full screen drawing. When
both the monitors are attached, the glutFullScreen call can draw into
approximately 1.5 times the screen space available. If I forcibly drag a
corner of the window to span both the displays, the window goes white and
cannot be dragged beyond the 3840th pixel.

GLint dims[2]; glGetIntegerv(GL_MAX_VIEWPORT_DIMS, &dims); printf("max viewport size: %i x %i pixels", dims[0], dims[1]);

What is the above result on the 6800? A surface can't be any larger than the max viewport size. In my app, a GL view in a window limits the max window frame size so it can't be grown larger than can be supported by the hardware. I also further limit this to the max texture size (rect or POT) which inhibits the software renderer from taking over (see NO_RECOVERY in pixel formats).
--
Shaun Wexler
MacFOH
http://www.macfoh.com


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References: 
 >Nvidia 6800 Ultra and 30" monitors. (From: Atul Nayak <email@hidden>)
 >Re: Nvidia 6800 Ultra and 30" monitors. (From: Shaun Wexler <email@hidden>)



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