198107 2019-05-22 04:46:11 -0700 WKWebView takeSnapshotWithConfiguration does not take a snapshot of html5 video (youtube.com) and WebGL (i.e. hardware accelerated) 2025-06-08 02:38:19 -0700 1 1 1 Unclassified WebKit WebKit API WebKit Local Build iPhone / iPad iOS 12 NEW InRadar P2 Normal --- 1 vladymyrvi webkit-unassigned bdakin dino eric.carlson jer.noble john simon.fraser thorton vladymyrvi webkit-bug-importer wenson_hsieh oldest_to_newest 1538154 0 vladymyrvi 2019-05-22 04:46:11 -0700 When the snapshot of WKWebView (not fullscreen mode) is taken with takeSnapshotWithConfiguration on iOS 12.2 (iPhone XR) (and any other supported version) instead of html5 video content (hardware accelerated - any youtube.com video) and any WebGL content - there is a black portion of the screen, other content around is shown normally. I suspect the issues is related to the fact some html5 videos and WebGL content is hardware accelerated and rendered differently. Exact WebKit version: AppleWebKit/605.1.15 Steps to reproduce: Take a snapshot of WKWebView (not fullscreen mode) on iOS 12.2 (iPhone XR) with takeSnapshotWithConfiguration of any playing youtube.com video (e.g. https://www.youtube.com/watch?v=CF2BfWYRZoc ) or a page with WebGL content (e.g. https://threejs.org/examples/#webgl_marchingcubes ) Result: Black part of the screen in the snapshot (image) instead of a content, other web-page content around is visible Expected result: As a user I can take a snapshot of hardware accelerated html5 videos and WebGL content, so they are present on the final snapshot image Code sample: WKSnapshotConfiguration *configuration = [WKSnapshotConfiguration new]; configuration.rect = CGRectMake(0, 0, boundsWidth, contentHeight); configuration.snapshotWidth = @(boundsWidth); //webView is WKWebView* [webView takeSnapshotWithConfiguration: configuration completionHandler: ^(UIImage * _Nullable snapshotImage, NSError * _Nullable error) { //Here is the code to deal with the image }]; 1538454 1 webkit-bug-importer 2019-05-22 16:25:01 -0700 <rdar://problem/51047322> 2122386 2 john 2025-06-08 02:38:19 -0700 I’m guessing all current and future SwiftUI Browser based versions of WebKit are negatively impacted by this as of 06-08-2025 across all platforms across the board