tree ea80fc8496360903ad4197808706a4dc534a7fe7
parent d51401a2adbbb70ea3ae2c91248b7c360bba68ae
author simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1487914420 +0000
committer simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1487914420 +0000

REGRESSION (r211305): Masks on composited elements with preserve-3d broken
https://bugs.webkit.org/show_bug.cgi?id=168815
rdar://problem/30676846

Reviewed by Jon Lee.

Source/WebCore:

r211305 moved the mask layer to be on the structural layer if there is one, to fix
masking backdrops. However, with preserve-3d the structural layer can be a CATransformLayer,
which doesn't take a mask, so limit the previous change to backdrops only.

Test: compositing/masks/mask-with-preserve-3d.html

* platform/graphics/ca/GraphicsLayerCA.cpp:
(WebCore::GraphicsLayerCA::updateMaskLayer):

LayoutTests:

* compositing/masks/mask-with-preserve-3d-expected.html: Added.
* compositing/masks/mask-with-preserve-3d.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@212941 268f45cc-cd09-0410-ab3c-d52691b4dbfc