Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 2f4ece1e291d102695ddfa420552982a25d55a9e
      
https://github.com/WebKit/WebKit/commit/2f4ece1e291d102695ddfa420552982a25d55a9e
  Author: Wenson Hsieh <wenson_hs...@apple.com>
  Date:   2025-05-10 (Sat, 10 May 2025)

  Changed paths:
    A 
LayoutTests/fullscreen/full-screen-disables-viewport-clipping-expected.html
    A LayoutTests/fullscreen/full-screen-disables-viewport-clipping.html
    M Source/WebCore/rendering/RenderLayerCompositor.cpp

  Log Message:
  -----------
  [Viewport Clipping] Disable fixed-position viewport clipping in element 
fullscreen
https://bugs.webkit.org/show_bug.cgi?id=292826
rdar://151018462

Reviewed by Richard Robinson.

Turn the viewport clipping layer off for fixed-position objects in element 
fullscreen, since:

- There's no browser chrome that might partially obscure fixed-position objects.
- Everything is effectively forced to be fixed-position in fullscreen mode.

* LayoutTests/fullscreen/full-screen-disables-viewport-clipping-expected.html: 
Added.
* LayoutTests/fullscreen/full-screen-disables-viewport-clipping.html: Added.

Add a layout test to verify that the layer tree with content inset fill enabled 
vs. disabled is
identical in fullscreen.

* Source/WebCore/rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::viewportConstrainedSublayers const):

Canonical link: https://commits.webkit.org/294763@main



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