Closed as not planned
Description
Polygons are always fully rasterized before being clipped to viewport size. It causes rasterizer to fail in presence of huge polygons which extend outside current plotting limits.
matplotlib.pyplot.fill_between is a command that can produce such polygons inadvertently (zooming a plot with fill_between can also produce this error).
A simple example
import numpy as np
import matplotlib.pyplot as plt
plt.switch_backend('qt4agg')
yup = np.array([6e6, -0.1, 0.8])
ydown = np.array([2e6, -1.8, 0.5])
x = np.linspace(0, 2, 3)
axs = plt.subplot(111)
axs.fill_between(x, ydown, yup)
axs.set_xlim(1, 2) # comment this to see full plot
axs.set_ylim(-2, 3) # comment this to see full plot
plt.show()Crashes (trace from 1.4.2 but problem is present in master as well)
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_qt5.py", line 338, in resizeEvent
self.draw()
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 148, in draw
FigureCanvasAgg.draw(self)
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 469, in draw
self.figure.draw(self.renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1079, in draw
func(*args)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/axes/_base.py", line 2092, in draw
a.draw(renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line 751, in draw
Collection.draw(self, renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line 293, in draw
mpath.Path(offsets), transOffset, tuple(facecolors[0]))
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 124, in draw_markers
return self._renderer.draw_markers(*kl, **kw)
OverflowError: Allocated too many blocks
While the desired result would be
