8000 Note minimum supported version for fontconfig. by anntzer · Pull Request #15626 · matplotlib/matplotlib · GitHub
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Note minimum supported version for fontconfig. #15626

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Merged
merged 1 commit into from
Nov 8, 2019
Merged

Note minimum supported version for fontconfig. #15626

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4 changes: 3 additions & 1 deletion INSTALL.rst
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Expand Up @@ -150,7 +150,9 @@ etc., you can install the following:
* `ImageMagick <https://www.imagemagick.org/script/index.php>`_: for saving
animated gifs;
* `LaTeX <https://miktex.org/>`_ and `GhostScript (>=9.0)
<https://ghostscript.com/download/>`_ : for rendering text with LaTeX.
<https://ghostscript.com/download/>`_ : for rendering text with LaTeX;
* `fontconfig <https://www.fontconfig.org>`_ (>= 2.7): for detection of system
fonts on Linux.

FreeType and Qhull
------------------
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4 changes: 4 additions & 0 deletions lib/matplotlib/font_manager.py
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Expand Up @@ -273,6 +273,10 @@ def _call_fc_list():
'This may take a moment.'))
timer.start()
try:
if b'--format' not in subprocess.check_output(['fc-list', '--help']):
_log.warning( # fontconfig 2.7 implemented --format.
'Matplotlib needs fontconfig>=2.7 to query system fonts.')
return []
out = subprocess.check_output(['fc-list', '--format=%{file}\\n'])
except (OSError, subprocess.CalledProcessError):
return []
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0