Re: Re: Conversion Modules from Pixels to Millimeters

On X11 systems, you can filter out the dpi number with the xdpyinfo command. On my system I get:

screen #0:
  dimensions:    1280x1024 pixels (361x292 millimeters)
  resolution:    90x89 dots per inch
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If you have Tk available on your system, you can get the dpi number by using the screenheight, screenmmheight, screenwidth and screenmmwidth methods. See also the Tk::Widget documentation.

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Re: Re: Re: Conversion Modules from Pixels to Millimeters by DrHyde (Prior) on Apr 16, 2004 at 09:21 UTC
That can only ever be a guess. It assumes that the system is set up properly, which is just crazy talk.	[reply]
Re: Re: Re: Re: Conversion Modules from Pixels to Millimeters by eserte (Deacon) on Apr 16, 2004 at 10:10 UTC
It seems that modern X11 servers with modern monitors can retrieve the display information automatically. At least I can't find any reference to the display size or dpi information in the configuration files, but the information provided by xdpyinfo is pretty accurate (only about 0.5 centimeters off).	[reply]