122784 2013-10-14 15:50:21 -0700 Missing content when compositing solid color combined with "paints into ancestor" layers 2014-12-11 15:32:13 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 133065 InRadar P2 Normal --- 1 simon.fraser simon.fraser dino noam simon.fraser webkit-bug-importer oldest_to_newest 939677 0 214199 simon.fraser 2013-10-14 15:50:21 -0700 Created attachment 214199 Testcase The testcase shows a bug (missing background image on the middle div) which I think happens because when we determine that an element can use the solid color optimization, we omit to check to see if any descendants render into it. 939678 1 simon.fraser 2013-10-14 15:50:34 -0700 <rdar://problem/15224559> 939708 2 simon.fraser 2013-10-14 16:25:35 -0700 A couple of things here: 1. I think this boolean logic in RenderLayerCompositor::requiresOwnBackingStore() is wrong: if (compositingAncestorLayer && (!compositingAncestorLayer->backing()->graphicsLayer()->drawsContent() || compositingAncestorLayer->backing()->paintsIntoWindow() || compositingAncestorLayer->backing()->paintsIntoCompositedAncestor())) return true; but fixing that would prevent having nested "paintsIntoCompositedAncestor()" layers. 2. isSimpleContainerCompositingLayer() gives the wrong answer if descendant compositing layers are "paints into ancestor" layers. 1054652 3 simon.fraser 2014-12-11 15:32:13 -0800 Fixed via bug 133065. *** This bug has been marked as a duplicate of bug 133065 *** 214199 2013-10-14 15:50:21 -0700 2013-10-14 15:50:21 -0700 Testcase testcase.html text/html 1069 simon.fraser PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgICA8c3R5bGU+CiAgICAgICAgI25hdmln YXRpb24gewogICAgICAgICAgICBwb3NpdGlvbjogYWJzb2x1dGU7CiAgICAgICAgICAgIGNvbG9y OiB3aGl0ZTsKICAgICAgICAgICAgd2lkdGg6IDQwMHB4OwogICAgICAgICAgICBoZWlnaHQ6IDQw MHB4OwogICAgICAgICAgICBiYWNrZ3JvdW5kOiBibGFjazsKICAgICAgICAgICAgb3ZlcmZsb3c6 IGhpZGRlbjsKICAgICAgICAgICAgei1pbmRleDogMTsKICAgICAgICB9CiAgICAgICAgCiAgICAg ICAgI2NoYXB0ZXJzIHsKICAgICAgICAgICAgcG9zaXRpb246IGFic29sdXRlOwogICAgICAgICAg ICB6LWluZGV4OiAzOwogICAgICAgICAgICBsZWZ0OiA1MHB4OwogICAgICAgICAgICB0b3A6IDUw cHg7CiAgICAgICAgICAgIHdpZHRoOiAzMDBweDsKICAgICAgICAgICAgaGVpZ2h0OiAzMDBweDsK ICAgICAgICAgICAgb3ZlcmZsb3c6IGhpZGRlbjsKICAgICAgICAgICAgYmFja2dyb3VuZDogdXJs KCJodHRwOi8vZmFybTYuc3RhdGljZmxpY2tyLmNvbS81NDUwLzEwMDg2MjUxNTk1X2UzZGZjZWVh NWMuanBnIik7CiAgICAgICAgfQogICAgICAgIAogICAgICAgIC5zbGlkaW5nLXZpZXcgewogICAg ICAgICAgICBwb3NpdGlvbjogYWJzb2x1dGU7CiAgICAgICAgICAgIHRvcDogNTBweDsKICAgICAg ICAgICAgbGVmdDogNTBweDsKICAgICAgICAgICAgaGVpZ2h0OiAyMDBweDsKICAgICAgICAgICAg d2lkdGg6IDIwMHB4OwogICAgICAgICAgICBiYWNrZ3JvdW5kLWNvbG9yOiBncmVlbjsKICAgICAg ICB9CiAgICAgICAgCiAgICAgICAgLmNvbXBvc2l0ZWQgewogICAgICAgICAgICAtd2Via2l0LXRy YW5zZm9ybTogdHJhbnNsYXRlWigwKTsKICAgICAgICB9CiAgICA8L3N0eWxlPgo8L2hlYWQ+Cjxi b2R5PgogICAgPGRpdiBpZD0ibmF2aWdhdGlvbiI+CiAgICAgICAgPGRpdiBpZD0iY2hhcHRlcnMi PgogICAgICAgICAgICA8ZGl2IGNsYXNzPSJzbGlkaW5nLXZpZXcgY29tcG9zaXRlZCI+PC9kaXY+ CiAgICAgICAgPC9kaXY+CiAgICA8L2Rpdj4KPC9ib2R5Pgo8L2h0bWw+Cg==