Re: [Hampshire] Pre-distorting console image
Does the graphics card offer anything to help? I know NVidia cards have a nvidia util which lets you adjust this sort of thing, but I have no idea about other cards. The option you are looking for is keystone iirc, maybe a search on that will help? Anton - Anton Piatek email: an...@piatek.co.uk blog/photos: http://www.strangeparty.com gpg: [74B1FA37] (http:// www.strangeparty.com/anton.asc) No trees were destroyed in the sending of this message, however, a significant number of electrons were terribly inconvenienced. On Sep 20, 2011 8:18 AM, Bob Dunlop bob.dun...@xyzzy.org.uk wrote: Hi, A bit of an oddball query but I thought someone here might know where to look. A friend at work wants to project the X11 console image onto a curved (in 2 directions) surface. He'd like to pre-distort the X11 image to counteract at least some of the distortion introduced by the curve. Anyone know where we might find an application to do this? In the good old days we'd slap some magnets around the back of the CRT to curve the beams, but this is a modern micro-mirror based projector so the pixels are fixed. -- Bob Dunlop -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk -- -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] Pre-distorting console image
On 20 September 2011 11:16, Anton Piatek an...@piatek.co.uk wrote: Does the graphics card offer anything to help? I know NVidia cards have a nvidia util which lets you adjust this sort of thing, but I have no idea about other cards. The option you are looking for is keystone iirc, maybe a search on that will help? Projectors often have this built in too. Al. -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] Pre-distorting console image
The option you are looking for is keystone iirc I think Bob's after a bit more than keystone correction; mapping onto a 2-D curved surface isn't yer run-of-the-mill operation... Vic. -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] Pre-distorting console image
The option you are looking for is keystone iirc I think Bob's after a bit more than keystone correction; mapping onto a 2-D curved surface isn't yer run-of-the-mill operation... Quite possibly, though from memory the nvidia driver did allow rather arbitary adjustments with some grid adjustment tool. Not sure if it does curves well though... Anton -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] Pre-distorting console image
Hi, Thanks for the imput so far. On Tue, Sep 20 at 11:29, Anton Piatek wrote: The option you are looking for is keystone iirc I think Bob's after a bit more than keystone correction; mapping onto a 2-D curved surface isn't yer run-of-the-mill operation... It's not PC hardware so nvidia is not an option anyway. 2-D curved surface but keystone would cover the bulk of it I think. Google threw up a few ideas eventually. Use an Xvfb or Xmem headless server to prepare a bitmap of the console image. Then use the real Xserver to display this bitmap via a texture mapping that does the distortion. I know the processor in question has 3D acceleration to do the texture mapping, but suspect the system hasn't got enough general ommph and ram to run two X servers in such a tricky configuration. Still thanks for the input. I'll pass it on. -- Bob Dunlop -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] Pre-distorting console image
I know the processor in question has 3D acceleration to do the texture mapping, but suspect the system hasn't got enough general ommph and ram to run two X servers in such a tricky configuration. I had some fun games implementing VirtualGL for a customer a while back; that allows you to do all sorts of natty things with *where* you do the processing. Give me a shout if I can help... Vic. -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
