minor fix

Author: leejjoon

lib/matplotlib/artist.py

@@ -26,8 +26,8 @@ def _prevent_rasterization(draw):
     # its draw method is explicitly decorated). If it is being drawn after a
     # rasterized artist and it has reached a raster_depth of 0, we stop
     # rasterization so that it does not affect the behavior of normal artist
-    # (e.g., change in dpi). If the artist's draw method is decorated
-    # (draw._supports_rasterization is True), it won't  be decorated by
+    # (e.g., change in dpi). If the artist's draw method is decorated (has a
+    # `_supports_rasterization` attribute), it won't be decorated by
     # `_prevent_rasterization`.
 
     if hasattr(draw, "_supports_rasterization"):
@@ -43,6 +43,7 @@ def draw_wrapper(artist, renderer):
 
         return draw(artist, renderer)
 
+    draw_wrapper._supports_rasterization = False
     return draw_wrapper
 
 
@@ -128,11 +129,14 @@ class Artist:
     zorder = 0
 
     def __init_subclass__(cls):
-        # Inject custom set() methods into the subclass with signature and
-        # docstring based on the subclasses' properties.
 
+        # Decorate draw() method so that all artists are able to stop
+        # rastrization when necessary.
         cls.draw = _prevent_rasterization(cls.draw)
 
+        # Inject custom set() methods into the subclass with signature and
+        # docstring based on the subclasses' properties.
+
         if not hasattr(cls.set, '_autogenerated_signature'):
             # Don't overwrite cls.set if the subclass or one of its parents
             # has defined a set method set itself.