diff --git a/lib/matplotlib/backends/backend_agg.py b/lib/matplotlib/backends/backend_agg.py
index b60227128c17..4cb14a6fe130 100644
--- a/lib/matplotlib/backends/backend_agg.py
+++ b/lib/matplotlib/backends/backend_agg.py
@@ -104,6 +104,14 @@ def __init__(self, width, height, dpi):
if __debug__: verbose.report('RendererAgg.__init__ done',
'debug-annoying')
+ def __getstate__(self):
+ # We only want to preserve the init keywords of the Renderer.
+ # Anything else can be re-created.
+ return {'width': self.width, 'height': self.height, 'dpi': self.dpi}
+
+ def __setstate__(self, state):
+ self.__init__(state['width'], state['height'], state['dpi'])
+
def _get_hinting_flag(self):
if rcParams['text.hinting']:
return LOAD_FORCE_AUTOHINT
diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
index d3bb5654477d..be7e94d5d36c 100644
--- a/lib/matplotlib/image.py
+++ b/lib/matplotlib/image.py
@@ -10,10 +10,8 @@
import os
import warnings
-import math
import numpy as np
-from numpy import ma
from matplotlib import rcParams
import matplotlib.artist as martist
@@ -113,6 +111,12 @@ def __init__(self, ax,
self.update(kwargs)
+ def __getstate__(self):
+ state = super(_AxesImageBase, self).__getstate__()
+ # We can't pickle the C Image cached object.
+ state.pop('_imcache', None)
+ return state
+
def get_size(self):
"""Get the numrows, numcols of the input image"""
if self._A is None:
diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
index cb7cd3ecb7d0..f9098d547de8 100644
--- a/lib/matplotlib/lines.py
+++ b/lib/matplotlib/lines.py
@@ -352,6 +352,12 @@ def __init__(self, xdata, ydata,
self._invalidy = True
self.set_data(xdata, ydata)
+ def __getstate__(self):
+ state = super(Line2D, self).__getstate__()
+ # _linefunc will be restored on draw time.
+ state.pop('_lineFunc', None)
+ return state
+
def contains(self, mouseevent):
"""
Test whether the mouse event occurred on the line. The pick
diff --git a/lib/matplotlib/tests/test_pickle.py b/lib/matplotlib/tests/test_pickle.py
index 98ed882175a8..0c289c2c702a 100644
--- a/lib/matplotlib/tests/test_pickle.py
+++ b/lib/matplotlib/tests/test_pickle.py
@@ -107,6 +107,8 @@ def test_simple():
plt.plot(list(xrange(10)), label='foobar')
plt.legend()
+ # Uncomment to debug any unpicklable objects. This is slow so is not
+ # uncommented by default.
# recursive_pickle(fig)
pickle.dump(ax, BytesIO(), pickle.HIGHEST_PROTOCOL)
@@ -195,17 +197,47 @@ def test_complete():
def test_no_pyplot():
# tests pickle-ability of a figure not created with pyplot
-
- import pickle as p
from matplotlib.backends.backend_pdf import FigureCanvasPdf as fc
from matplotlib.figure import Figure
fig = Figure()
- can = fc(fig)
+ _ = fc(fig)
ax = fig.add_subplot(1, 1, 1)
ax.plot([1, 2, 3], [1, 2, 3])
-
- # Uncomment to debug any unpicklable objects. This is slow so is not
- # uncommented by default.
-# recursive_pickle(fig)
pickle.dump(fig, BytesIO(), pickle.HIGHEST_PROTOCOL)
+
+
+def test_renderer():
+ from matplotlib.backends.backend_agg import RendererAgg
+ renderer = RendererAgg(10, 20, 30)
+ pickle.dump(renderer, BytesIO())
+
+
+def test_image():
+ # Prior to v1.4.0 the Image would cache data which was not picklable
+ # once it had been drawn.
+ from matplotlib.backends.backend_agg import new_figure_manager
+ manager = new_figure_manager(1000)
+ fig = manager.canvas.figure
+ ax = fig.add_subplot(1, 1, 1)
+ ax.imshow(np.arange(12).reshape(3, 4))
+ manager.canvas.draw()
+ pickle.dump(fig, BytesIO())
+
+
+def test_grid():
+ from matplotlib.backends.backend_agg import new_figure_manager
+ manager = new_figure_manager(1000)
+ fig = manager.canvas.figure
+ ax = fig.add_subplot(1, 1, 1)
+ ax.grid()
+ # Drawing the grid triggers instance methods to be attached
+ # to the Line2D object (_lineFunc).
+ manager.canvas.draw()
+
+ pickle.dump(ax, BytesIO())
+
+
+if __name__ == '__main__':
+ import nose
+ nose.runmodule(argv=['-s'])
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