Bug 311980

Summary:

REGRESSION(300173@main): invert filter not applied to exported PDF

Product:

WebKit

Reporter:

Brad West <bw>

Component:

Printing

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

a_protyasha, bw, bya, sabouhallawa, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 26

Hardware:

Mac (Apple Silicon)

OS:

Unspecified

See Also:

https://bugs.webkit.org/show_bug.cgi?id=299063

Attachments:

Description	Flags
Test case with html and image	none
Screenshot of test case in Safari	none
Screenshot of PDF exported from Safari 26, as seen in Preview	none
PDF exported from Safari 26	none
PDF exported from Safari 17	none

Brad West

Reported 2026-04-10 15:19:48 PDT

Created attachment 479000 [details] Test case with html and image Open the attached test case, which includes a simple bit of html and a black image. - Row one of the test case includes the default black-on-white color scheme and a black decorative image - On row two, the color scheme is switched to white-on-black and the decorative image is switched to white with the invert() filter This all appears as expected in the browser. When exported to PDF, however, the invert filter is not applied to the image, which is no longer visible on the black background. I'll add screenshots of the test case in the browser and the generated PDF in Preview, as well as the PDF itself. This regression seems to have happened at some point in Safari 26 development, but I'm not sure when. This works as expected in apps that use WebKit on Sequoia, and I've verified it works as expected in Safari 17.

Attachments
Test case with html and image (3.29 KB, application/zip) 2026-04-10 15:19 PDT, Brad West	no flags	Details
Screenshot of test case in Safari (79.45 KB, image/png) 2026-04-10 15:20 PDT, Brad West	no flags	Details
Screenshot of PDF exported from Safari 26, as seen in Preview (126.17 KB, image/png) 2026-04-10 15:21 PDT, Brad West	no flags	Details
PDF exported from Safari 26 (15.45 KB, application/pdf) 2026-04-10 15:22 PDT, Brad West	no flags	Details
PDF exported from Safari 17 (15.86 KB, application/pdf) 2026-04-10 15:22 PDT, Brad West	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Brad West

Comment 1 2026-04-10 15:20:52 PDT

Created attachment 479001 [details] Screenshot of test case in Safari

Brad West

Comment 2 2026-04-10 15:21:35 PDT

Created attachment 479002 [details] Screenshot of PDF exported from Safari 26, as seen in Preview

Brad West

Comment 3 2026-04-10 15:22:35 PDT

Created attachment 479003 [details] PDF exported from Safari 26

Brad West

Comment 4 2026-04-10 15:22:54 PDT

Created attachment 479004 [details] PDF exported from Safari 17

Alexey Proskuryakov

Comment 5 2026-04-11 10:35:30 PDT

Thank you for the report! I can reproduce with Safari 26.5 beta.

Radar WebKit Bug Importer

Comment 6 2026-04-11 10:35:36 PDT

<rdar://problem/174565635>

Abrar Rahman Protyasha

Comment 7 2026-04-13 10:03:41 PDT

Does not reproduce with Safari 18.6

Said Abou-Hallawa

Comment 8 2026-04-13 14:33:49 PDT

This bug will not reproduce if the feature `GraphicsContext Filter Rendering` is turned off. CSS filters such as `invert()` were changed to use `FEColorMatrix` and CG filters in 300173@main. So this bug is a regression of this change.

Nipun Shukla

Comment 9 2026-05-05 11:00:14 PDT

Pull request: https://github.com/WebKit/WebKit/pull/64283

EWS

Comment 10 2026-05-08 11:36:27 PDT

Committed 312906@main (ce508eb8d84b): <https://commits.webkit.org/312906@main> Reviewed commits have been landed. Closing PR #64283 and removing active labels.

Note You need to log in before you can comment on or make changes to this bug.