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Author Topic: How do you get pixels per millimeter in linux?  (Read 1153 times)

jianwt

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How do you get pixels per millimeter in linux?
« on: January 16, 2023, 01:24:37 pm »

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Novice seeking advice
In windows, you can use GetDeviceCaps(Frm.Canvas.Handle, LOGPIXELSX) * 10/254 to get the pixel width per millimeter.

So how do you get pixels per millimeter in linux?
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wp

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Re: How do you get pixels per millimeter in linux?
« Reply #1 on: January 16, 2023, 01:41:40 pm »
ScreenInfo.PixelsPerInchX and .PixelsPerInchY in unit Graphics, or Screen.PixelsPerInch or Monitor.PixelsPerInch in unit Forms.
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jianwt

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Re: How do you get pixels per millimeter in linux?
« Reply #2 on: January 16, 2023, 02:22:36 pm »
Thank you very much。
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Thaddy

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Re: How do you get pixels per millimeter in linux?
« Reply #3 on: January 16, 2023, 04:37:36 pm »
pixels per inch are not pixels per millimeter.
Pixels per Centimeter: pixelsperinch/2.54
Pixels per MilliMeter:   pixelsperinch/25.4
« Last Edit: January 16, 2023, 04:41:50 pm by Thaddy »
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wp

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Re: How do you get pixels per millimeter in linux?
« Reply #4 on: January 16, 2023, 04:45:57 pm »
Thaddy, it is clear from the first post that the OP knows how to convert inches to millimeters.
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wyattwong

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Re: How do you get pixels per millimeter in linux?
« Reply #5 on: January 16, 2023, 05:48:16 pm »
Thank you
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