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Fix animation blitting for plots with shared axes #14880

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merged 1 commit into from
Jul 24, 2019
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Fix animation blitting for plots with shared axes #14880

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6 changes: 6 additions & 0 deletions lib/matplotlib/animation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1216,12 +1216,18 @@ def _blit_draw(self, artists, bg_cache):
# Handles blitted drawing, which renders only the artists given instead
# of the entire figure.
updated_ax = []

# Enumerate artists to cache axes' backgrounds. We do not draw
# artists yet to not cache foreground from plots with shared axes
for a in artists:
# If we haven't cached the background for this axes object, do
# so now. This might not always be reliable, but it's an attempt
# to automate the process.
if a.axes not in bg_cache:
bg_cache[a.axes] = a.figure.canvas.copy_from_bbox(a.axes.bbox)

# Make a separate pass to draw foreground
for a in artists:
a.axes.draw_artist(a)
updated_ax.append(a.axes)

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