Bug 111216

Summary:

Multiple text-shadows on tspan renders incorrectly at non 1.0 zoom

Product:

WebKit

Reporter:

Spencer Nielsen <spencer>

Component:

SVG

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED CONFIGURATION CHANGED

Severity:

Major

CC:

ahmad.saleem792, david.cabo, karlcow, sabouhallawa, webkit-bug-importer, zimmermann

Priority:

Keywords:

InRadar

Version:

528+ (Nightly build)

Hardware:

All

OS:

All

URL:

https://ultralink.me/svgTextShadowTest.html

See Also:

https://bugs.webkit.org/show_bug.cgi?id=139810

Attachments:

Description	Flags
TEST - tspan, TEST2 - span	none
test case	none
Test case screenshot	none

Spencer Nielsen

Reported 2013-03-01 13:27:34 PST

When there are multiple text-shadows on a tspan element it does not render correctly when the zoom level is changed from the normal 1.0 zoom level (either zooming in or zooming out will do it). It appears like it is correctly zooming only the first text-shadow on the element and doing something weird with all the other ones. A normal span element with the same set of text-shadows renders correctly at different zoom levels. Reproduced with Safari 5.1.7, 6.0.2, WebKit r144443 and Chrome 25.0.1364.99.

Attachments
TEST - tspan, TEST2 - span (13.82 KB, image/png) 2013-03-01 13:28 PST, Spencer Nielsen	no flags	Details
test case (352 bytes, image/svg+xml) 2016-10-10 12:08 PDT, Said Abou-Hallawa	no flags	Details
Test case screenshot (1.22 MB, image/png) 2016-10-10 12:09 PDT, Said Abou-Hallawa	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Spencer Nielsen

Comment 1 2013-03-01 13:28:34 PST

Created attachment 191026 [details] TEST - tspan, TEST2 - span

David Cabo

Comment 2 2016-07-19 10:57:31 PDT

This bug still exists as described by the original author, in Safari 9.1.1, on both Retina and non-Retina displays (so it seems to be different to #139810, which happened only in Retina ones). Happens also with Safari on iOS 9.3.3.

David Kilzer (:ddkilzer)

Comment 3 2016-10-03 10:47:57 PDT

<rdar://problem/28591263>

Said Abou-Hallawa

Comment 4 2016-10-10 12:07:50 PDT

The is no test case attached here. The url https://ultralink.me/svgTextShadowTest.html is not working. When trying to create a text case similar to the attached screenshot, I found that with applying only a single text-shadow to the <text> element and zooming the svg, the display can be incorrect. I am attaching the test case and a screenshot showing the different between Chrome and Safari showing the same test case with the same zoom factor.

Said Abou-Hallawa

Comment 5 2016-10-10 12:08:21 PDT

Created attachment 291133 [details] test case

Said Abou-Hallawa

Comment 6 2016-10-10 12:09:08 PDT

Created attachment 291134 [details] Test case screenshot

Ahmad Saleem

Comment 7 2023-07-31 16:35:44 PDT

Just to update - It is reproducible in STP175 and also on WebKit ToT [266457@main] (LBSE & non-LBSE) as well. Chrome Canary 117 and Firefox Nightly 117 has 'glow' / 'shadow' across whole word unlike just 'w' in Safari using Comment 05 test case.

Ahmad Saleem

Comment 8 2024-07-28 06:58:12 PDT

I am unable to reproduce this bug on Safari 17.6 Beta, zooming in and out does not cause any issue. I am closing this and CCing - Karl for any input or double check.

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