diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
index e14aadcb48bd..7ae584ac63df 100644
--- a/lib/matplotlib/backends/backend_pdf.py
+++ b/lib/matplotlib/backends/backend_pdf.py
@@ -1626,6 +1626,13 @@ def check_gc(self, gc, fillcolor=None):
orig_alphas = getattr(gc, '_effective_alphas', (1.0, 1.0))
+ if gc._rgb is None:
+ if gc.get_linewidth() != 0:
+ warnings.warn('if rgb is None, ' +
+ 'linewidth should also be 0')
+ # doesn't matter what color here
+ gc._rgb = [1, 0, 0, 1]
+
if gc._forced_alpha:
gc._effective_alphas = (gc._alpha, gc._alpha)
elif fillcolor is None or len(fillcolor) < 4:
diff --git a/lib/matplotlib/testing/compare.py b/lib/matplotlib/testing/compare.py
index c3d649e38069..b6f508660fc9 100644
--- a/lib/matplotlib/testing/compare.py
+++ b/lib/matplotlib/testing/compare.py
@@ -355,8 +355,8 @@ def crop_to_same(actual_path, actual_image, expected_path, expected_image):
# clip the images to the same size -- this is useful only when
# comparing eps to pdf
if actual_path[-7:-4] == 'eps' and expected_path[-7:-4] == 'pdf':
- aw, ah = actual_image.shape
- ew, eh = expected_image.shape
+ aw, ah, ad = actual_image.shape
+ ew, eh, ed = expected_image.shape
actual_image = actual_image[int(aw / 2 - ew / 2):int(
aw / 2 + ew / 2), int(ah / 2 - eh / 2):int(ah / 2 + eh / 2)]
return actual_image, expected_image
diff --git a/lib/matplotlib/testing/decorators.py b/lib/matplotlib/testing/decorators.py
index 3a0dd4e0f9a8..1237ca85fecc 100644
--- a/lib/matplotlib/testing/decorators.py
+++ b/lib/matplotlib/testing/decorators.py
@@ -223,7 +223,12 @@ def _xfail_if_format_is_uncomparable(extension):
def _mark_xfail_if_format_is_uncomparable(extension):
- will_fail = extension not in comparable_formats()
+ will_fail = True
+ for compare_type in comparable_formats():
+ if (isinstance(extension, type(compare_type)) and
+ extension == compare_type):
+ will_fail = False
+ break
if will_fail:
fail_msg = 'Cannot compare %s files on this system' % extension
import pytest
diff --git a/lib/matplotlib/tests/test_backend_pdf.py b/lib/matplotlib/tests/test_backend_pdf.py
index 3529ea8541db..fac9cd8635fd 100644
--- a/lib/matplotlib/tests/test_backend_pdf.py
+++ b/lib/matplotlib/tests/test_backend_pdf.py
@@ -19,7 +19,9 @@
_determinism_check)
from matplotlib.testing.decorators import image_comparison
from matplotlib import dviread
+from matplotlib.testing.compare import compare_images
+import matplotlib as mpl
needs_tex = pytest.mark.xfail(
not checkdep_tex(),
@@ -191,3 +193,22 @@ def psfont(*args, **kwargs):
ax.text(0.5, 0.5, 'hello')
with tempfile.TemporaryFile() as tmpfile, pytest.raises(ValueError):
fig.savefig(tmpfile, format='pdf')
+
+
+def test_pdf_savefig_when_color_is_none():
+ backup_params = mpl.rcParams.copy()
+ mpl.rcParams.update(mpl.rcParamsDefault)
+ plt.subplot()
+ plt.axis('off')
+ plt.plot(np.sin(np.linspace(-5, 5, 100)), 'v', c='none')
+ try:
+ plt.savefig("figure.pdf", format='pdf')
+ except Exception:
+ pytest.fail("Failed to save pdf")
+ plt.savefig("figure.eps", format='eps')
+ result = compare_images('figure.pdf', 'figure.eps', 0)
+ assert result is None
+ from os import remove
+ remove('figure.eps')
+ remove('figure.pdf')
+ mpl.rcParams.update(backup_params)
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