284976 2024-12-19 14:30:20 -0800 Add a feature flag for remote snapshotting 2025-01-06 20:51:30 -0800 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=284427 InRadar P2 Normal --- 282664 1 sabouhallawa webkit-unassigned bfulgham simon.fraser webkit-bug-importer zalan oldest_to_newest 2083109 0 sabouhallawa 2024-12-19 14:30:20 -0800 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. 2083110 1 webkit-bug-importer 2024-12-19 14:31:36 -0800 <rdar://problem/141783206> 2083112 2 webkit-bug-importer 2024-12-19 14:32:14 -0800 <rdar://problem/141783279> 2083126 3 sabouhallawa 2024-12-19 15:11:33 -0800 Pull request: https://github.com/WebKit/WebKit/pull/38228 2085301 4 sabouhallawa 2025-01-06 20:51:30 -0800 Committed 288504@main (d9f35fa): https://commits.webkit.org/288504@main Reviewed commits have been landed. Closing PR #38228 and removing active labels.