third_party/WebKit/LayoutTests/paint/invalidation/relative-position-under-composited-scroll.html - Issue 1937303003: Set layers needsRepaint along the original compositingContainer chain if stacking status changes

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Issue 1937303003: Set layers needsRepaint along the original compositingContainer chain if stacking status changes (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 4 years, 7 months ago

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	1 <!DOCTYPE html>

	2 Tests paint invalidation when an object under composited scrolled container is

	3 set 'display: relative'. Passes if no red residue.

	4 <div style="overflow: scroll; width: 200px; height: 200px">

	5 <div style="width: 800px; height: 800px">

	6 <div id="item" style="background-color: red; width: 50px; height: 50px"></di v>

	7 </div>

	8 </div>

	9 <script src="../../resources/run-after-layout-and-paint.js"></script>

	10 <script>

	11 if (window.internal)

	12 internals.settings.setPreferCompositingToLCDTextEnabled(true);
	chrishtr 2016/05/02 21:13:32 How about using will-changeL transform instead of How about using will-changeL transform instead of scrolling? Is there something special about scrolling? Xianzhu 2016/05/02 21:59:29 It's special because it establishes a composited l Show quoted text On 2016/05/02 21:13:32, chrishtr wrote: > How about using will-changeL transform instead of scrolling? Is there something > special about > scrolling? It's special because it establishes a composited layer but is not a stacking context. When some of its descendants becomes stacked, the descendant will change paint invalidation container to its stacking context.
	13 runAfterLayoutAndPaint(function() {

	14 item.style.position = 'relative';

	15 item.style.left = '100px';

	16 item.style.top = '100px';

	17 item.style.backgroundColor = 'green';

	18 }, true);

	19 </script>

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