RESOLVED FIXED284976
Add a feature flag for remote snapshotting 
https://bugs.webkit.org/show_bug.cgi?id=284976
Summary Add a feature flag for remote snapshotting
Said Abou-Hallawa
Reported 2024-12-19 14:30:20 PST
Currently snapshotting a page to an image or a PDFDocument has to go through this IPC workflow: UIProcess -> WebProcess -> UIProcess. After 288113@main and with site isolation enabled, snapshotting will go through the following IPC workflow: UIProcess -> WebProcess -> GPUProcess -> UIProcess. So any WebProcess can't see the drawing of the other WebProcesses. To address the review comment https://github.com/WebKit/WebKit/pull/37756#discussion_r1891010340, a new feature flag will be introduced to allow testing the remote snapshotting separate from the site isolation. If site isolation is enabled, the main frame has to compose itself with all the remote iframes to get the correct snapshotting. This will be done in future patches.
Attachments
Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2024-12-19 14:31:36 PST
<rdar://problem/141783206>
Radar WebKit Bug Importer
Comment 2 2024-12-19 14:32:14 PST
<rdar://problem/141783279>
Said Abou-Hallawa
Comment 3 2024-12-19 15:11:33 PST
Pull request: https://github.com/WebKit/WebKit/pull/38228
Said Abou-Hallawa
Comment 4 2025-01-06 20:51:30 PST
Committed 288504@main (d9f35fa): https://commits.webkit.org/288504@main Reviewed commits have been landed. Closing PR #38228 and removing active labels.
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