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jackharmon

SLI system - 4 contiguous monitors?

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Is it possible to use all 4 video ports to render a single scene using DirectX? Where would I start other than searching the forums? Is there example code someone could point me to? Thanks!

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I've only ever rendered to two monitors at once, but as long as there is driver support I assume it would be possible for four as well.

On my dual-screen app, driver support is imperative. The user must go into the ATI Catalyst Control Center / NVidia Control Panel, and set their displays into "Span mode" - this performs some wizardry at the driver-level, which convinces Windows that you actually only have one (big) monitor.

In my case, after making this change in the control panel, I have one 1280x2048 screen instead of two 1280x1024 screens. Then I can just run a full-screen D3D application as usual. If I only want to render to one of the (physical) screens, then I just adjust the viewport to target half of the (virtual) screen.


If the drivers don't allow you to do this with 4 screens, then there are still alternatives, such as creating multiple windows (one per screen), but performance would be worse.

[edit]Ysaneya has posted about some dual-screen work here before too. His technique of rendering to an off-screen buffer is a really good idea if you don't have driver-level support like I do in my above post ;)

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