Unable to set more than one font in legends, impossible to label data with Glyph from multiple languages. #15260

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1. mvarnold commented on Sep 12, 2019

   

   mvarnold

   on Sep 12, 2019

   Author

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   A work around for at least rendering the text is as follows

   from fontTools.ttLib import TTFont
   import matplotlib.font_manager as mfm
   import matplotlib.pyplot as plt
   
   def char_in_font(Unicode_char, font):
       for cmap in font['cmap'].tables:
           if cmap.isUnicode():
               if ord(Unicode_char) in cmap.cmap:
                   return True
       return False
   
   def label_unicode(char, axs,x=0.5,y=0.5):
       
   
       font_info = [(f.fname, f.name) for f in mfm.fontManager.ttflist]
       
       print('finding fonts for ',char)
       font_list = []
       for i, font in enumerate(font_info):
           if char_in_font(char[1], TTFont(font[0], fontNumber=0)):
               #print(font[0], font[1]) #uncomment to see all your fonts
               font_list.append(font[0])
               
       font_path = font_list[-1]
       prop = mfm.FontProperties(fname=font_path) # find this font
       axs.text(x, y, s=char, fontproperties=prop, fontsize=20)
   
   f, axs = plt.subplots()
   plt.plot([i for i in range(5)])
   label_unicode(u"#방탄소년단 ",axs,1,1)
   label_unicode(u"#裏垢女子",axs,1.5,2)
   label_unicode(u"#🔥",axs,2,3)
   plt.show()

   
2. anntzer

   added

   topic: text/fonts

   on Sep 12, 2019
3. anntzer commented on Sep 13, 2019

   

   anntzer

   on Sep 13, 2019

   Contributor

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   allowing lists of fonts to be specified for each handle label, rather than enforcing using one font.

   The problem is well understood, but would require major rearchitecting of the text handling machinery, so is unlikely to happen soon.
4. anntzer

   added

   Difficulty: Hardhttps://matplotlib.org/devdocs/devel/contribute.html#good-first-issueshttps://matplotlib.org/devdocs/devel/contribute.html#good-first-issues

   on Nov 3, 2020
5. anntzer commented on Nov 3, 2020

   

   anntzer

   on Nov 3, 2020

   Contributor

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   I'll close this in favor of #18883 which is essentially the same but points more explicitly at font-family fallbacks.
6. anntzer

   closed this as completedon Nov 3, 2020
7. anntzer

   added

   status: duplicate

   on Nov 3, 2020