Hey all,
I've done this in Linux, and assumed It would be no problem in OSX...
I want to create a large stereo window, one that spans two screens (dual heads off an ATI card) so that each view has its own screen. The machine will have a ATI PCI card for control display, and the ATI AGP dual-head card. Do I use "secondscreen 1" ? Can I leave the gemwin offset to 0,0 (if the screen is arranged futherest to the left) and just give it dimentions larger than the physical screen so it spills over to fill the second screen? Since Gem does video mode switching on OSX I'm not sure if this will actually work... In linux all the "screens" are just viewports onto one big desktop. So this is what I want:
1024 1024 1024 +--------+--------+--------+ |Screen 1|Screen 2|Screen 3| |OpenGL 1|OpenGL 2| 2D PCI | 768 | | | | +--------+--------+--------+
my patch is on the (primary display) "screen 3" the gemwin has an offset of 0,0 and dimen of 2048x768.
I've not been able to test anything because I don't have the dual-head card yet, but I wanted to check with the OSX Devs because it would be a real shame not to be able to do this...
Thanks all Ben
Ben
I don't have 3 displays to test on, so I can only give you a few hints on what to try.
- use the dimen + offset messages rather than secondscreen. the latter is meant for using a fullscreen context on a 2nd display like a projector connected to a powerbook
- i'm having a problem spanning the display when the window overlaps the screen with the menu bar. also you have to make sure the total dimensions are less than 2048 - offset 0 0 dimen 2039 768 will work but 2048 768 might give you a white box.
- make sure the displays are properly aligned in the control panel. on the mac you can have displays in any x,y relationship to one another. this might cause problems.
- the biggest unknown will probably how the combination of AGP and PCI cards are handled - the dual dual display card should be ok, but you never know.
Also, you're pretty much on your own for this since neither Jamie or I have a way to test more than two screen support (we both have powerbooks). If I find any docs on this from Apple I'll pass them along.
Good luck
cgc
Hey all,
I've done this in Linux, and assumed It would be no problem in OSX...
I want to create a large stereo window, one that spans two screens (dual heads off an ATI card) so that each view has its own screen. The machine will have a ATI PCI card for control display, and the ATI AGP dual-head card. Do I use "secondscreen 1" ? Can I leave the gemwin offset to 0,0 (if the screen is arranged futherest to the left) and just give it dimentions larger than the physical screen so it spills over to fill the second screen? Since Gem does video mode switching on OSX I'm not sure if this will actually work... In linux all the "screens" are just viewports onto one big desktop. So this is what I want:
1024 1024 1024 +--------+--------+--------+ |Screen 1|Screen 2|Screen 3| |OpenGL 1|OpenGL 2| 2D PCI | 768 | | | | +--------+--------+--------+
my patch is on the (primary display) "screen 3" the gemwin has an offset of 0,0 and dimen of 2048x768.
I've not been able to test anything because I don't have the dual-head card yet, but I wanted to check with the OSX Devs because it would be a real shame not to be able to do this...
Thanks all Ben
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