https://bugs.documentfoundation.org/show_bug.cgi?id=86856

--- Comment #11 from j22...@gmail.com ---
Even though in electronic displays a pixel is a relative unit (and thus the
final size of the image will depend on the particular device), a standard must
be used to render images in web pages and for interoperability in real-world
applications. Why not use those for LO as well?

These are the definitions and specs from the Cascading Style Sheets of the
World Wide Web Consortium (W3C).

UNIT            NAME                    EQUIVALENCE
------------------------------------------------------------------
px      pixels                          1px = 1/96th of 1in
cm      centimeters                     1cm = 96px/2.54
mm      millimeters                     1mm = 1/10th of 1cm
Q       quarter-millimeters             1Q = 1/40th of 1cm
in      inches                          1in = 2.54cm = 96px
pc      picas                           1pc = 1/6th of 1in
pt      points                          1pt = 1/72nd of 1in

References:
https://www.w3.org/TR/css3-values/#reference-pixel
https://drafts.csswg.org/css-values-3/#reference-pixel
https://drafts.csswg.org/css-values/#absolute-lengths
https://codepen.io/patrickhlauke/full/zqabMR/

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