Bug 199133 – [Async overflow scroll] Clipped composited layers inside overflow scroll jitter and get incorrectly clipped

• Component: Scrolling
• Status: RESOLVED FIXED

[Simon Fraser (smfr)]

[Async overflow scroll] Clipped composited layers inside overflow scroll jitter and get incorrectly clipped

[Simon Fraser (smfr)]

Created attachment 372693 [details]
Patch

[Simon Fraser (smfr)]

<rdar://problem/43614439>

[Antti Koivisto]

Comment on attachment 372693 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=372693&action=review

> Source/WebCore/ChangeLog:54
> +        With this patch, ScrollingTreePositionedNode are purely for absolute position inside non-containing-block
> +        stacking context overflow scroll. LayoutConstraints is renamed to AbsolutePositionConstraints accordingly.

You might also want to rename ScrollingTreePositionedNode to something more specific (AbsolutePositionedNode?).

> LayoutTests/compositing/scrolling/async-overflow-scrolling/clipped-layer-in-overflow-clipped-by-scroll.html:50
> +                document.getElementById('layers').innerText = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_CLIPPING);

It would be good to also have some dynamic reftests showing element moving like they should, not just tree dumps.

[Antti Koivisto]

Comment on attachment 372693 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=372693&action=review

> Source/WebCore/rendering/LayerAncestorClippingStack.cpp:124
> +    int numClipEntries = clipDataStack.size();
> +    int numStackEntries = m_stack.size();

I prefer 'clipEntryCount', 'stackEntryCount'

> Source/WebCore/rendering/RenderLayerCompositor.cpp:4237
> +            // FIXME: The child might be in a child frame. Need to do something that crosses frame boundaries.

The child might be a child frame but this doesn't shouldn't happen in any more general case (and is already handled by frame hosting nodes perhaps?).

[Simon Fraser (smfr)]

Created attachment 372709 [details]
Patch

[EWS Watchlist]

Comment on attachment 372709 [details]
Patch

Attachment 372709 [details] did not pass mac-ews (mac):
Output: https://webkit-queues.webkit.org/results/12557237

New failing tests:
css3/blending/blend-mode-clip-rect-accelerated-blending.html
css3/blending/blend-mode-clip-accelerated-blending-double.html
css3/blending/blend-mode-clip-accelerated-transformed-blending.html
css3/blending/blend-mode-clip-accelerated-blending-with-siblings.html
css3/blending/blend-mode-clip-accelerated-blending-child.html
legacy-animation-engine/compositing/backing/backing-store-attachment-empty-keyframe.html
imported/blink/css3/blending/mix-blend-mode-has-ancestor-clipping-layer.html
compositing/overflow/scrolling-content-clip-to-viewport.html
css3/blending/blend-mode-isolation-accelerated-overflow-hidden.html
compositing/rtl/rtl-scrolling-with-transformed-descendants.html
css3/blending/blend-mode-accelerated-parent-overflow-hidden.html
css3/blending/blend-mode-clip-accelerated-blending-canvas.html

[EWS Watchlist]

Created attachment 372714 [details]
Archive of layout-test-results from ews101 for mac-highsierra

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews101  Port: mac-highsierra  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 372709 [details]
Patch

Attachment 372709 [details] did not pass mac-wk2-ews (mac-wk2):
Output: https://webkit-queues.webkit.org/results/12557254

New failing tests:
css3/blending/blend-mode-clip-rect-accelerated-blending.html
css3/blending/blend-mode-clip-accelerated-blending-double.html
css3/blending/blend-mode-clip-accelerated-transformed-blending.html
css3/blending/blend-mode-clip-accelerated-blending-with-siblings.html
css3/blending/blend-mode-clip-accelerated-blending-child.html
imported/blink/css3/blending/mix-blend-mode-has-ancestor-clipping-layer.html
legacy-animation-engine/compositing/backing/backing-store-attachment-empty-keyframe.html
css3/blending/blend-mode-isolation-accelerated-overflow-hidden.html
css3/blending/blend-mode-accelerated-parent-overflow-hidden.html
css3/blending/blend-mode-clip-accelerated-blending-canvas.html

[EWS Watchlist]

Created attachment 372715 [details]
Archive of layout-test-results from ews105 for mac-highsierra-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews105  Port: mac-highsierra-wk2  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 372709 [details]
Patch

Attachment 372709 [details] did not pass mac-debug-ews (mac):
Output: https://webkit-queues.webkit.org/results/12557270

New failing tests:
css3/blending/blend-mode-clip-rect-accelerated-blending.html
css3/blending/blend-mode-clip-accelerated-blending-double.html
css3/blending/blend-mode-clip-accelerated-transformed-blending.html
css3/blending/blend-mode-clip-accelerated-blending-with-siblings.html
css3/blending/blend-mode-clip-accelerated-blending-child.html
legacy-animation-engine/compositing/backing/backing-store-attachment-empty-keyframe.html
imported/blink/css3/blending/mix-blend-mode-has-ancestor-clipping-layer.html
compositing/overflow/scrolling-content-clip-to-viewport.html
css3/blending/blend-mode-isolation-accelerated-overflow-hidden.html
compositing/rtl/rtl-scrolling-with-transformed-descendants.html
css3/blending/blend-mode-accelerated-parent-overflow-hidden.html
css3/blending/blend-mode-clip-accelerated-blending-canvas.html

[EWS Watchlist]

Created attachment 372717 [details]
Archive of layout-test-results from ews116 for mac-highsierra

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews116  Port: mac-highsierra  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 372709 [details]
Patch

Attachment 372709 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: https://webkit-queues.webkit.org/results/12557294

New failing tests:
platform/ios/media/video-play-glyph-composited-outside-overflow-scrolling-touch-container.html
css3/blending/blend-mode-clip-rect-accelerated-blending.html
css3/blending/blend-mode-clip-accelerated-blending-double.html
css3/blending/blend-mode-clip-accelerated-transformed-blending.html
css3/blending/blend-mode-clip-accelerated-blending-with-siblings.html
css3/blending/blend-mode-clip-accelerated-blending-child.html
imported/blink/css3/blending/mix-blend-mode-has-ancestor-clipping-layer.html
legacy-animation-engine/compositing/backing/backing-store-attachment-empty-keyframe.html
css3/blending/blend-mode-isolation-accelerated-overflow-hidden.html
css3/blending/blend-mode-accelerated-parent-overflow-hidden.html

[EWS Watchlist]

Created attachment 372718 [details]
Archive of layout-test-results from ews124 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews124  Port: ios-simulator-wk2  Platform: Mac OS X 10.14.5

[Simon Fraser (smfr)]

Created attachment 372720 [details]
Patch

[EWS Watchlist]

Comment on attachment 372720 [details]
Patch

Attachment 372720 [details] did not pass mac-ews (mac):
Output: https://webkit-queues.webkit.org/results/12558068

New failing tests:
compositing/rtl/rtl-scrolling-with-transformed-descendants.html
compositing/overflow/scrolling-content-clip-to-viewport.html

[EWS Watchlist]

Created attachment 372724 [details]
Archive of layout-test-results from ews101 for mac-highsierra

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews101  Port: mac-highsierra  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 372720 [details]
Patch

Attachment 372720 [details] did not pass mac-debug-ews (mac):
Output: https://webkit-queues.webkit.org/results/12558098

New failing tests:
compositing/rtl/rtl-scrolling-with-transformed-descendants.html
compositing/overflow/scrolling-content-clip-to-viewport.html

[EWS Watchlist]

Created attachment 372727 [details]
Archive of layout-test-results from ews115 for mac-highsierra

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews115  Port: mac-highsierra  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 372720 [details]
Patch

Attachment 372720 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: https://webkit-queues.webkit.org/results/12558110

New failing tests:
platform/ios/media/video-play-glyph-composited-outside-overflow-scrolling-touch-container.html

[EWS Watchlist]

Created attachment 372728 [details]
Archive of layout-test-results from ews122 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews122  Port: ios-simulator-wk2  Platform: Mac OS X 10.14.5

[Simon Fraser (smfr)]

https://trac.webkit.org/r246725

[Radar WebKit Bug Importer]

<rdar://problem/52039797>

[Michael Catanzaro]

I'm seeing spam from GraphicsContext now:

GraphicsContext 0x7ffd8765f6b0 stack changed by 1
GraphicsContext 0x7ffd8765f830 stack changed by 1
GraphicsContext 0x7ffd8765f6b0 stack changed by 1

WebKit shouldn't print anything during normal use. Simon, can we remove this?

[Simon Fraser (smfr)]

Ooops, I left those in by mistake. I'll remove.

[Simon Fraser (smfr)]

Removing via bug 199834.