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doc: add tip on Fontconfig

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For users who want to understand how fonts work under the hood.
This commit is contained in:
David Lechner
2020-04-08 09:58:13 +02:00
committed by laurensvalk
parent b5159a850a
commit f51a25c051
1 changed files with 19 additions and 0 deletions
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doc/api/media.rst
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@@ -248,6 +248,25 @@ Fonts
.. automethod:: pybricks.media.ev3dev.Font.text_height
.. tip:: Behind the scenes, Pybricks uses Fontconfig_ for fonts. The Fontconfig
command line tools can be used to explore available fonts in more
detail.
Example::
# List available font families.
fc-list :scalable=false:dpi=119 family
# Perform lookup similar to Font.DEFAULT
fc-match :scalable=false:dpi=119:family=Lucida:size=12
# Perform lookup similar to Font(size=24,lang=zh-cn)
fc-match :scalable=false:dpi=119:size=24:lang=zh-cn
Pybricks only allows the use of bitmap fonts (``scalable=false``)
and the screen on the EV3 has 119 pixels per inch (``dpi=119``).
.. _FontConfig: https://www.freedesktop.org/wiki/Software/fontconfig/
Image Manipulation
^^^^^^^^^^^^^^^^^^