Wednesday April 06, 2005 Jay Cotton's Weblog
Wednesday April 06, 2005
Jay Cotton's weblog
Lately, we'v seen LCD's get to very large formats. Not just inches across, but dots per inch and maximum number of pixels in width. Many of the latest LCD's are 2k + pixels in width. With 100dpi and higher pitch, its getting to the point where the LCD display is as good as the first laser printers.
I foresee a problem. It is now possible to create a display system, using xinerama with more display pixels than the X server can address. Say, 16 heads, each with a 2K+ display and you have more than 32k pixels. Many of the newer graphics boards will support 2 heads, and do it at the 2K+ resolution.
A few years ago we (Xorg) talked about this, but at the time it seemed... distant. Not so any more. It is now time to start serious work on extending the X wire protocol so that it can handle very large format video walls and the like, using the newest displays.
Xorg is considering removing the 16 head limit on the server and going to 256. Machines that can handle that amount of PCI buss and card slots etc. do exist now. So, we are pushing the limits from both directions.
Apr 06 2005, 04:26:43 PM PDT
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Comments:
It may be interesting to see a solution here as other parts of X11 such as XPrint hit the 32k pixel limit already with DINA0 paper size.
Posted by Felix Schulte on June 01, 2005 at 03:13 PM PDT #
Felix:
You hit the nail on the head. That is exactly
the kind of problems that we will be seeing with
X11 very soon.
Posted by Jay Cotton on June 03, 2005 at 12:46 PM PDT #
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