Bug 289187

Summary:

REGRESSION (288504@main): If Remote Snapshotting is enabled and transformX is applied, text is flipped when exporting a PDF

Product:

WebKit

Reporter:

Brad Andalman <bya>

Component:

Printing

Assignee:

Nobody <webkit-unassigned>

Status:

REOPENED

Severity:

Major

CC:

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

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Mac (Apple Silicon)

OS:

macOS 15

See Also:

https://bugs.webkit.org/show_bug.cgi?id=308365

Attachments:

Description	Flags
HTML that, when exported as PDF, will include flipped text	none
PDF with flipped text (generated using Safari Technology Preview)	none
Screenshot of (correct) appearance in Safari	none

Brad Andalman

Reported 2025-03-05 12:45:18 PST

Created attachment 474461 [details] HTML that, when exported as PDF, will include flipped text Steps to repro: 1. Open the attached HTML in Safari Technology Preview (or in Safari in macOS 15.4b2) 2. Choose File > Export as PDF… 3. In the exported PDF, the "Lorem ipsum" text will be flipped. This appears to be due to the two `transform` CSS properties in the HTML. If there is only one, the bug does not appear. The actual value for the `translateX()` doesn't appear to matter: the text is flipped regardless of the value.

Attachments
HTML that, when exported as PDF, will include flipped text (1017 bytes, text/html) 2025-03-05 20:45 PST, Brad Andalman	no flags	Details
PDF with flipped text (generated using Safari Technology Preview) (15.84 KB, application/pdf) 2025-03-05 20:46 PST, Brad Andalman	no flags	Details
Screenshot of (correct) appearance in Safari (298.55 KB, image/png) 2025-03-05 20:48 PST, Brad Andalman	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Brad Andalman

Comment 1 2025-03-05 12:46:47 PST

Created attachment 474462 [details] PDF with flipped text (generated using Safari Technology Preview)

Brad Andalman

Comment 2 2025-03-05 12:48:02 PST

Created attachment 474463 [details] Screenshot of (correct) appearance in Safari

Abrar Rahman Protyasha

Comment 3 2025-03-05 12:52:49 PST

Hello, thank you for the report! Which version of Safari Technology Preview are you seeing this on?

Brad Andalman

Comment 4 2025-03-05 13:06:16 PST

I've only tested it on the Safari Technology Preview (Release 214). Though it also appears in macOS 15.4 beta 2.

Radar WebKit Bug Importer

Comment 5 2025-03-05 16:52:35 PST

<rdar://problem/146340218>

Aditya Keerthi

Comment 6 2025-03-05 22:37:05 PST

This appears to be caused by https://commits.webkit.org/288504@main (enablement of Remote Snapshotting).

Said Abou-Hallawa

Comment 7 2025-03-06 13:35:32 PST

Pull request: https://github.com/WebKit/WebKit/pull/42031

EWS

Comment 8 2025-03-06 14:40:29 PST

Committed 291733@main (8467e81ce2ac): <https://commits.webkit.org/291733@main> Reviewed commits have been landed. Closing PR #42031 and removing active labels.

EWS

Comment 9 2025-03-12 13:19:14 PDT

Committed 289651.269@safari-7621-branch (4156e0e19b40): <https://commits.webkit.org/289651.269@safari-7621-branch> Reviewed commits have been landed. Closing PR #2788 and removing active labels.

Brad Andalman

Comment 10 2025-04-02 17:41:12 PDT

This is broken in macOS 15.5 Beta (24F5042g) and Safari Technology Preview (215). Reopening.

Brad Andalman

Comment 11 2025-04-02 17:49:20 PDT

It looks like the above commit hasn't yet pulled into Safari Technology Preview 215, so the fix never made it there. However, the bug was fixed in Safari 18.4 but is once again broken in Safari Version 18.5 (20621.2.1.11.5)

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