Merge pull request #3763 from mdboom/fix-webagg

tacaswell · tacaswell · commit cf4f3323e615 · 2014-11-07T13:09:09.000-05:00
BUG : fix type being passed to png writer in webAgg
diff --git a/lib/matplotlib/backends/backend_webagg_core.py b/lib/matplotlib/backends/backend_webagg_core.py
@@ -143,7 +143,7 @@ def get_diff_image(self):
             # TODO: We should write a new version of write_png that
             # handles the differencing inline
             _png.write_png(
-                output,
+                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                 self._png_buffer)
 
             # Swap the renderer frames
