197654 2019-05-07 03:07:49 -0700 Translucent gradient rendering bug due to will-change transform 2019-06-01 19:54:50 -0700 1 1 1 Unclassified WebKit Compositing Safari Technology Preview Mac macOS 10.14 RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=153852 https://bugs.webkit.org/show_bug.cgi?id=197611 InRadar P2 Normal --- 1 jonastreub simon.fraser ben bfulgham commit-queue dino graouts liugb1101 sabouhallawa simon.fraser webkit-bug-importer zalan oldest_to_newest 1533857 0 jonastreub 2019-05-07 03:07:49 -0700 Overview: When toggling an element background from a color to a translucent gradient the gradient sometimes gets a black background. This only appears to happen when will-change transform is enabled for the element. 1) View the example: https://codepen.io/jonastreub/pen/XwbWaR 2) Toggle the element background by clicking it 3) Notice that the gradient has a black background Expected Results: The gradient to be translucent. 1533983 1 webkit-bug-importer 2019-05-07 11:18:29 -0700 <rdar://problem/50547664> 1534086 2 simon.fraser 2019-05-07 13:29:39 -0700 Sounds like we're failing to update contentsOpaque. 1535368 3 simon.fraser 2019-05-11 12:33:25 -0700 We currently re-evaluate contentsOpaque in RenderLayerBacking::updateGeometry(), but that doesn't fire for just a background change (repaint triggers an updateConfiguration()). However, contentsOpaque depends on geometry, and updateConfiguration() runs first, so I think we'll have to move it to updateAfterDescendants(). 1535371 4 369658 simon.fraser 2019-05-11 13:00:49 -0700 Created attachment 369658 Patch 1535380 5 369658 commit-queue 2019-05-11 15:05:43 -0700 Comment on attachment 369658 Patch Clearing flags on attachment: 369658 Committed r245207: <https://trac.webkit.org/changeset/245207> 1535381 6 commit-queue 2019-05-11 15:05:44 -0700 All reviewed patches have been landed. Closing bug. 1535383 7 simon.fraser 2019-05-11 15:06:47 -0700 This did not fix bug 197611, so something else is going on there. 1540208 8 simon.fraser 2019-05-29 19:12:52 -0700 *** Bug 197611 has been marked as a duplicate of this bug. *** 1541040 9 simon.fraser 2019-06-01 19:54:50 -0700 *** Bug 196946 has been marked as a duplicate of this bug. *** 369658 2019-05-11 13:00:49 -0700 2019-05-11 15:05:43 -0700 Patch bug-197654-20190511130048.patch text/plain 8135 simon.fraser U3VidmVyc2lvbiBSZXZpc2lvbjogMjQ1MjA0CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggOTA0NTg5YTFhMWEwNmJi N2M0MGY5NzVlMmE2MWYxOTM3OTU4MzlhYy4uMjI5NDVjYjIwMGRjYWU5YmIwYzM2MTcyZDkxMzgw ODY5NTkwZDE5ZCAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDI5IEBACisyMDE5LTA1LTExICBTaW1v biBGcmFzZXIgIDxzaW1vbi5mcmFzZXJAYXBwbGUuY29tPgorCisgICAgICAgIFRyYW5zbHVjZW50 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