Normalize path case before checking for fonts.

QuLogic · QuLogic · commit 2dd780d370b0 · 2017-02-01T02:12:49.000-05:00
This is a problem on Windows where file paths are case-insensitive.
diff --git a/lib/matplotlib/font_manager.py b/lib/matplotlib/font_manager.py
@@ -1284,13 +1284,16 @@ def findfont(self, prop, fontext='ttf', directory=None,
             cached = _lookup_cache[fontext].get(prop)
             if cached is not None:
                 return cached
+        else:
+            directory = os.path.normcase(directory)
 
         best_score = 1e64
         best_font = None
 
         for font in fontlist:
             if (directory is not None and
-                os.path.commonprefix([font.fname, directory]) != directory):
+                    os.path.commonprefix([os.path.normcase(font.fname),
+                                          directory]) != directory):
                 continue
             # Matching family should have highest priority, so it is multiplied
             # by 10.0
