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Noted a Windows limit on opening fonts [ci skip]

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Andrew Murray 2019-08-12 20:19:49 +10:00
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commit b307fb4808
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src/PIL/ImageFont.py
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@ -546,6 +546,11 @@ def truetype(font=None, size=10, index=0, encoding="", layout_engine=None):
This function loads a font object from the given file or file-like This function loads a font object from the given file or file-like
object, and creates a font object for a font of the given size. object, and creates a font object for a font of the given size.
Note that Pillow uses FreeType to open font files. If you are opening many
fonts simultaneously on Windows, be aware that Windows limits the number of
files that can be open in C at once to 512. If you approach that limit, an
``OSError`` may be thrown, reporting that FreeType "cannot open resource".
This function requires the _imagingft service. This function requires the _imagingft service.
:param font: A filename or file-like object containing a TrueType font. :param font: A filename or file-like object containing a TrueType font.