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Commit faebb37

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Fix matplotlib#1894: Composite images do not have a transparent background
1 parent 4256538 commit faebb37

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6 files changed

+284
-3
lines changed

6 files changed

+284
-3
lines changed

‎lib/matplotlib/image.py

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -315,7 +315,7 @@ def _draw_unsampled_image(self, renderer, gc):
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316316
fc = self.axes.patch.get_facecolor()
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bg = mcolors.colorConverter.to_rgba(fc, 0)
318-
im.set_bg(*bg)
318+
im.set_bg(*bg)
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# image input dimensions
321321
im.reset_matrix()
@@ -1078,7 +1078,7 @@ def get_window_extent(self, renderer=None):
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10791079
def contains(self, mouseevent):
10801080
"""Test whether the mouse event occured within the image."""
1081-
if callable(self._contains):
1081+
if callable(self._contains):
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return self._contains(self, mouseevent)
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10841084
if not self.get_visible():# or self.get_figure()._renderer is None:
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‎lib/matplotlib/tests/baseline_images/test_image/image_composite_background.svg

Lines changed: 272 additions & 0 deletions
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‎lib/matplotlib/tests/test_image.py

Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -225,6 +225,15 @@ def test_image_edges():
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assert g != 100, 'Expected a non-green edge - but sadly, it was.'
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228+
@image_comparison(baseline_images=['image_composite_background'], remove_text=True)
229+
def test_image_composite_background():
230+
fig = plt.figure()
231+
ax = fig.add_subplot(111)
232+
np.random.seed(0)
233+
ax.imshow(np.random.rand(15, 15), extent=[0, 2, 15, 0])
234+
ax.imshow(np.random.rand(15, 15), extent=[4, 6, 15, 0])
235+
ax.set_axis_bgcolor('k')
236+
ax.set_xlim([0, 12])
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229238
if __name__=='__main__':
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import nose

‎src/_image.cpp

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -820,7 +820,7 @@ _image_module::from_images(const Py::Tuple& args)
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pixfmt pixf(*imo->rbufOut);
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renderer_base rb(pixf);
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823-
rb.clear(agg::rgba(1, 1, 1, 1));
823+
rb.clear(agg::rgba(1, 1, 1, 0));
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for (size_t imnum = 0; imnum < N; imnum++)
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{
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tup = Py::Tuple(tups[imnum]);

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