Bug 198334

Summary: SVG random lines appearing and legit lines disappearing while panning
Product: WebKit Reporter: y.chen5
Component: SVGAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: sabouhallawa, simon.fraser, webkit-bug-importer, zalan, zimmermann
Priority: P2 Keywords: InRadar
Version: Safari 12   
Hardware: All   
OS: All   
Attachments:
Description Flags
full example + video
none
SVG file none

Description y.chen5 2019-05-29 08:33:57 PDT
Created attachment 370852 [details]
full example + video

Lines not defined in SVG will appear and disappear randomly when panning around.
Lines defined in SVG might disappear randomly when panning around.

Video: https://youtu.be/BqlItab0k_g

No fancy SVG feature like script or media query. The only elements used are text/path

Live exaple: https://codepen.io/alt22247/pen/vwzBmL

Can't reproduce this with small files. The larger the file the worst this gets.
Comment 1 Alexey Proskuryakov 2019-05-29 13:42:42 PDT
I can reproduce. Looks like lines that span tiles sometimes draw wrong.
Comment 2 Radar WebKit Bug Importer 2019-05-29 13:43:04 PDT
<rdar://problem/51234986>
Comment 3 Said Abou-Hallawa 2019-05-29 13:55:06 PDT
Created attachment 370882 [details]
SVG file
Comment 4 Simon Fraser (smfr) 2019-05-29 13:58:50 PDT
This looks like a bug in a framework below WebKit.