Partially transparent markers with edges are rendered differently by agg, pdf and svg backends. #10035
Comments
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Copying my comment from #15051: |
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Actually I think pdf's behavior is nicer, but we could at least think whether having consistent behavior across the backends is a goal here. For example mplcairo's pdf output is the same as for svg (i.e. with the visible overlap). (Perhaps it's just a matter of setting |
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The svg part has been fixed by #11105, but understanding the difference in pdf rendering by ghostscript would still be nice (or perhaps it's just a matter of passing the right flags to it). |
Bug report
Bug summary
The baseline images for the rgba_markers test (rgba_markers.{png,pdf,svg}) clearly show differences in rendering between agg, pdf and svg:
top left is the svg baseline rendered by inkview (inkscape) 0.92.2, top right is the png baseline, bottom left is the pdf baseline rendered by okular 17.08.3, bottom right is the pdf baseline rendered by gs 9.22 (gs is used by the testing framework to rasterize the pdf for image comparisons).
Code for reproduction
N/A
Actual outcome
On the right subplot, whether the central blue disk overlaps with the edge red circle depends on the backend... and, for the case of pdf, also on the renderer (so that part may possibly be a bug in eother okular or gs, but at least svg and png should not be different).
Expected outcome
All three backends should render hatching in a similar manner.
Matplotlib version
print(matplotlib.get_backend())):The text was updated successfully, but these errors were encountered: