PNG thumbnail of SVG file shows wrong black areas
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	Anthony2106
	Oct 29 2024, 11:34 AM

Description

Steps to replicate the issue (include links if applicable):

look at the bitmap of the SVG

What happens?:

it has black in the photo: https://commons.wikimedia.org/wiki/File:Wpw2_(CardioNetworks_ECGpedia).svg

What should have happened instead?:

it shouldnt have black in the photo, it should look like the original photo: https://en.ecgpedia.org/wiki/File:Wpw2.svg

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

Event Timeline

Anthony2106 created this task.Oct 29 2024, 11:34 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptOct 29 2024, 11:34 AM

Anthony2106 added a project: SVG.Oct 29 2024, 11:34 AM

Aklapper renamed this task from SVG render error to PNG thumbnail of SVG file shows wrong black areas.Oct 29 2024, 11:41 AM

Aklapper removed a project: SVG.

Aklapper updated the task description. (Show Details)

Aklapper added a project: Thumbor.

I can reproduce this locally rendering the SVG file itself using librsvg 2.59.1 but not when opening in Inkscape 1.4.
The problem disappears when removing filter:url(#filter6570) from the style attribute of path3475 and path5451.
So this looks like an upstream issue in the librsvg library that we use.

I reported this in https://gitlab.gnome.org/GNOME/librsvg/-/issues/1138

Aklapper moved this task from Backlog to librsvg (upstream) on the Wikimedia-SVG-rendering board.Oct 29 2024, 11:58 AM

Aklapper moved this task from Backlog to Reported Upstream on the Upstream board.

ok thanks, also on normacs (image viewer) and nemo (file manager) it is wrong so yeah probably librsvg

Anthony2106 updated the task description. (Show Details)Oct 29 2024, 12:14 PM

Anthony2106 updated the task description. (Show Details)

The SVG file itself is broken according to https://gitlab.gnome.org/GNOME/librsvg/-/issues/1138#note_2261317 by using a comma instead of a period in the NumberList, so the SVG file should be fixed instead.

A fix to properly handle this will be included in librsvg 2.59.3 (though it may take a long time to deploy that version on Wikimedia servers)

PNG thumbnail of SVG file shows wrong black areasClosed, InvalidPublicBUG REPORTActions

Description

Event Timeline

PNG thumbnail of SVG file shows wrong black areas
Closed, InvalidPublicBUG REPORT
Actions