On Tue, 2005-10-11 at 13:56 -0400, R. Stavros Bezas wrote: > Robert, > In regards to the "1:1 pixel mapping" idea you suggested: Do you have > any more information regarding this so I can look further into it, I > am curious to find out more about it.
1:1 mapping only applies to discrete devices like lcd's and dmd (digital micromirror device). Thanks to google I now know that is what DLP uses. (This is difference between a technical article read years ago and something useful.) At any rate those devices have some real physical resolution since there is a discrete number of elements. Perhaps it is 1920x1080. I don't know. What you want to do is set your graphics card to that physical resolution and use a dvi/hdmi cable to send it to your tv. Now the key to 1:1 pixel mapping is your sending digital data for say coordinate 100,500 over that dvi cable. That data should only be used to change the intensities associated with the 100,500th element. That is all there is to it. One would think it would be obvious and work everywhere there is a digital connection, but it doesn't. The vizio I have, for one, I couldn't get it to work with the hdmi connection, but apparently many tv's take that digital signal and rescale it and make it fit the available pixels, hence even if you input the exact size for your xorg.conf file, you get something that is slightly smeared on your screen. How do you determine if this is happening? Well create a png file that is composed of a black and white lines arranged vertically. Black lines for the even numbered lines, and white for the odd or visa versa. Show that on your tv and if it looks even and uniform then you have 1:1 mapping, if not, then not. Again, if its mostly video your showing, I doubt you can really tell from a few feet away. You might tell with text, and well it will be obvious with that kind of prepared image. In general though a 1:1 mapping should make things a little sharper than it otherwise be when sent from a computer. Note that you may not be able to manage your full resolution as a 1:1 mapping. The panel I'm getting is 1366x768 and I've read reports that you can do 1360x768 and throwing away 6 lines. At any rate good luck.. -Robert
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