Bug 219978

Summary:

SVG foreignObject content (seemingly) doesn't get the transform from ancestry tree

Product:

WebKit

Reporter:

Bogdan Brinza <bogdan.brinza>

Component:

SVG

Assignee:

Nobody <webkit-unassigned>

Status:

NEW ---

Severity:

Normal

CC:

sabouhallawa, smoley, webkit-bug-importer, zimmermann

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Minimal reduction	none
Safari issue	none
Firefox reference	none
Safari with a scale applied to foreignObject content	none
Minimal reduction	none
Minimal reduction	none

Description Bogdan Brinza 2020-12-16 23:08:08 PST

Created attachment 416393 [details]
Minimal reduction

Original site issue found on UniFi controller topology map (https://demo.ui.com/manage/site/default/maps/topology - this demo page takes forever to load in Safari btw, instant in Firefox).

Device icons are basically fixed size as you zoom and move around. There is a zoom level where they look good, every other zoom level breaks them.

I'm attaching a minimal reduction that demonstrates the issue - unifi.html and two image Safari-broken.png and Firefox-working.png (it also works in Chromium FWIW).

Looking at the minimal repro almost everything seems like a red herring, the actually important things are:

<g transform="translate(50,50) scale(0.5)"> - a node with a transform in the ancestry chain

<foreignObject width="48" height="48" x="-24" y="-24"> - foreignObject with a specified size 48x48

Observing the result in Safari and Firefox one can notice that both foreignObjects are twice as large in Safari. (Twice as large and 0.5 scale, hmmmmm :-))

To confirm this I've added another CSS rule that applies scale(0.5) directly to the foreignObject first child nodes (see xforeignObject) - if one removes "x" to make a valid rule and reloads in Safari - the rendering will be identical to Firefox.

Comment 1 Bogdan Brinza 2020-12-16 23:08:28 PST

Created attachment 416394 [details]
Safari issue

Comment 2 Bogdan Brinza 2020-12-16 23:08:41 PST

Created attachment 416395 [details]
Firefox reference

Comment 3 Bogdan Brinza 2020-12-16 23:09:10 PST

Created attachment 416396 [details]
Safari with a scale applied to foreignObject content

Comment 4 Bogdan Brinza 2020-12-16 23:44:46 PST

Created attachment 416399 [details]
Minimal reduction

Comment 5 Bogdan Brinza 2020-12-17 08:59:50 PST

Created attachment 416422 [details]
Minimal reduction

Based on my earlier notes, I've removed everything irrelevant to demonstrate the problem even more clearly

Comment 6 Smoley 2020-12-22 12:17:54 PST

Thanks for filing, I can reproduce this on Safari 13.1.3 as well as STP 117.

Comment 7 Radar WebKit Bug Importer 2020-12-22 12:18:06 PST

<rdar://problem/72596144>