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Exporting figure as pdf using savefig() messes up axis background in OS X #1894

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Merged
merged 1 commit into from
Apr 12, 2013
Merged

Exporting figure as pdf using savefig() messes up axis background in OS X #1894

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6 changes: 6 additions & 0 deletions doc/users/whats_new.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,12 @@ The individual items of a collection may now have different alpha
values and be rendered correctly. This also fixes a bug where
collections were always filled in the PDF backend.

Multiple images on same axes are correctly transparent
------------------------------------------------------

When putting multiple images onto the same axes, the background color
of the axes will now show through correctly.

.. _whats-new-1-2:

new in matplotlib-1.2
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4 changes: 2 additions & 2 deletions lib/matplotlib/image.py
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Expand Up @@ -315,7 +315,7 @@ def _draw_unsampled_image(self, renderer, gc):

fc = self.axes.patch.get_facecolor()
bg = mcolors.colorConverter.to_rgba(fc, 0)
im.set_bg( *bg)
im.set_bg(*bg)

# image input dimensions
im.reset_matrix()
Expand Down Expand Up @@ -1078,7 +1078,7 @@ def get_window_extent(self, renderer=None):

def contains(self, mouseevent):
"""Test whether the mouse event occured within the image."""
if callable(self._contains):
if callable(self._contains):
return self._contains(self, mouseevent)

if not self.get_visible():# or self.get_figure()._renderer is None:
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Binary file added lib/matplotlib/tests/baseline_images/test_image/image_composite_background.pdf
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272 changes: 272 additions & 0 deletions lib/matplotlib/tests/baseline_images/test_image/image_composite_background.svg
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9 changes: 9 additions & 0 deletions lib/matplotlib/tests/test_image.py
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Expand Up @@ -225,6 +225,15 @@ def test_image_edges():

assert g != 100, 'Expected a non-green edge - but sadly, it was.'

@image_comparison(baseline_images=['image_composite_background'], remove_text=True)
def test_image_composite_background():
fig = plt.figure()
ax = fig.add_subplot(111)
arr = np.arange(12).reshape(4, 3)
ax.imshow(arr, extent=[0, 2, 15, 0])
ax.imshow(arr, extent=[4, 6, 15, 0])
ax.set_axis_bgcolor((1, 0, 0, 0.5))
ax.set_xlim([0, 12])

if __name__=='__main__':
import nose
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2 changes: 1 addition & 1 deletion src/_image.cpp
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Expand Up @@ -820,7 +820,7 @@ _image_module::from_images(const Py::Tuple& args)
pixfmt pixf(*imo->rbufOut);
renderer_base rb(pixf);

rb.clear(agg::rgba(1, 1, 1, 1));
rb.clear(agg::rgba(0, 0, 0, 0));
for (size_t imnum = 0; imnum < N; imnum++)
{
tup = Py::Tuple(tups[imnum]);
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