Bug 299270

Summary:

REGRESSION (296827@main): Opacity/filter render incorrectly

Product:

WebKit

Reporter:

Nathan Manceaux-Panot <kind.plan9761>

Component:

Layout and Rendering

Assignee:

Matt Woodrow <mattwoodrow>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

bfulgham, sabouhallawa, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari 26

Hardware:

iPhone / iPad

OS:

iOS 26

Attachments:

Description	Flags
Before/after screenshots	none
Testcase	none

Nathan Manceaux-Panot

Reported 2025-09-21 23:37:29 PDT

Created attachment 476819 [details] Before/after screenshots On iOS 26, an picture with opacity and filter CSS properties renders incorrectly (opacity is not applied, only grayscale filter), whereas it rendered correctly on iOS 18. You can see the glitch on https://retcon.app/ . The logo in the top left corner should be slightly dimmed, instead of fully contrasted. (also see attached before/after screenshots)

Attachments
Before/after screenshots (2.71 MB, application/zip) 2025-09-21 23:37 PDT, Nathan Manceaux-Panot	no flags	Details
Testcase (762 bytes, text/html) 2025-09-23 11:32 PDT, Simon Fraser (smfr)	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2025-09-22 16:43:52 PDT

<rdar://problem/161130683>

Simon Fraser (smfr)

Comment 2 2025-09-23 11:32:29 PDT

Created attachment 476840 [details] Testcase

Simon Fraser (smfr)

Comment 3 2025-09-23 13:38:02 PDT

This regressed at https://commits.webkit.org/296827@main

Matt Woodrow

Comment 4 2025-09-23 19:39:52 PDT

Pull request: https://github.com/WebKit/WebKit/pull/51232

EWS

Comment 5 2025-09-25 21:07:11 PDT

Committed 300549@main (f06618676171): <https://commits.webkit.org/300549@main> Reviewed commits have been landed. Closing PR #51232 and removing active labels.

EWS

Comment 6 2025-09-30 23:25:24 PDT

Committed 297297.495@safari-7622-branch (fc2ae3837566): <https://commits.webkit.org/297297.495@safari-7622-branch> Reviewed commits have been landed. Closing PR #3737 and removing active labels.

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