PlantUML diagrams lines misplaced

[kohtala]

I'm using PlantUML for diagramming.

Unfortunately some lines are misplaced in some diagrams.

I have CairoSVG 2.4.2 and did try pip install --upgrade https://github.com/Kozea/CairoSVG/archive/master.zip to see if commit 1b3d448 would have a fix. They worked the same.

Host is Ubuntu 18.04.4 LTS. Python 3.7.5. plantuml 1:1.2017.15-1, but I also tried agains svg produced by 1.2020.5 from the jar.

I get this:

I really need PDF, which looks much the same deployment.pdf

Other tools (this with rsvg-convert) produce this:

The images were created with these plantuml and svg files:
deployment.zip

$ plantuml -tsvg deployment.plantuml
$ cairosvg -fpdf -o deployment.pdf deployment.svg
$ cairosvg -fpng -o deployment.png deployment.svg

Thanks. It looks promising. I did missinglinkelectronics/sphinxcontrib-svg2pdfconverter#7 to hopefully give it more visibility and use.

[liZe]

Hello, thanks for the bug report!

The bug is caused by the gaussian blur filter. This filter is supposed to move the background rectangle (+4, +4), to blur it and to blend the blur with the original rectangle. As CairoSVG doesn’t support complex filters (see #23), it just moves the rectangle.

A simple workaround is to remove the filter definition: you can remove the <defs> or the <filter> tag from the SVG file. Handling complex filters is almost impossible using Cairo (see Kozea/WeasyPrint#13), so you can’t expect a quick fix for CairoSVG 😒.

[kohtala]

Thanks.

With your hint to shadows, I found PlantUML has directive

skinparam shadowing false

This removes the shadow and the result from cairosvg looks much better.

[kohtala]

I closed this as duplicate of #23. No point in keeping this open. Thanks.