20047 2008-07-15 16:30:02 -0700 Incorrect rendering during opacity transition on element with positioned children 2008-07-18 12:17:24 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Mac OS X 10.5 RESOLVED FIXED P2 Normal --- 1 simon.fraser simon.fraser dino hyatt oldest_to_newest 85988 0 simon.fraser 2008-07-15 16:30:02 -0700 In the attached testcase, a positioned element runs a transition when its opacity changes on :hover. However, a child element which is positioned snaps to the final opacity, without showing the transition, which is wrong. This only happens if: * the child is positioned * the target opacity is 1 I think it's related to stacking context changes when opacity hits 1. 85989 1 22293 simon.fraser 2008-07-15 16:30:25 -0700 Created attachment 22293 Testcase 85994 2 22295 simon.fraser 2008-07-15 16:58:30 -0700 Created attachment 22295 Better testcase; reveals stacking context 85996 3 22296 simon.fraser 2008-07-15 17:04:19 -0700 Created attachment 22296 Patch (with some FIXMES) 86001 4 22296 hyatt 2008-07-15 19:35:17 -0700 Comment on attachment 22296 Patch (with some FIXMES) The property has to blend in order for this problem to be exposed. I think you only need the opacity and transform checks. 86120 5 22321 simon.fraser 2008-07-16 15:48:02 -0700 Created attachment 22321 Patch, testcase, changelogs 86121 6 22321 hyatt 2008-07-16 15:55:46 -0700 Comment on attachment 22321 Patch, testcase, changelogs r=me 86136 7 dino 2008-07-16 18:16:51 -0700 Committing to http://svn.webkit.org/repository/webkit/trunk ... M LayoutTests/ChangeLog A LayoutTests/transitions/opacity-transition-zindex-expected.txt A LayoutTests/transitions/opacity-transition-zindex.html M WebCore/ChangeLog M WebCore/page/AnimationController.cpp Committed r35207 22293 2008-07-15 16:30:25 -0700 2008-07-15 16:58:30 -0700 Testcase opacity-transition.html text/html 954 simon.fraser PCFET0NUWVBFIGh0bWwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMDEgVHJhbnNpdGlvbmFs Ly9FTiIKICAgImh0dHA6Ly93d3cudzMub3JnL1RSL2h0bWw0L2xvb3NlLmR0ZCI+Cgo8aHRtbCBs YW5nPSJlbiI+CjxoZWFkPgogIDxtZXRhIGh0dHAtZXF1aXY9IkNvbnRlbnQtVHlwZSIgY29udGVu dD0idGV4dC9odG1sOyBjaGFyc2V0PXV0Zi04Ij4KICA8dGl0bGU+T3BhY2l0eSBUcmFuc2l0aW9u PC90aXRsZT4KICA8c3R5bGUgdHlwZT0idGV4dC9jc3MiIG1lZGlhPSJzY3JlZW4iPgogICAgICAj Y29udGFpbmVyIHsKICAgICAgICBwb3NpdGlvbjogcmVsYXRpdmU7CiAgICAgICAgaGVpZ2h0OiAz MDBweDsKICAgICAgICB3aWR0aDogMzAwcHg7CiAgICAgICAgYmFja2dyb3VuZC1jb2xvcjogZ3Jl ZW47CiAgICAgICAgb3BhY2l0eTogMC41OwogICAgICAgIC13ZWJraXQtdHJhbnNpdGlvbi1wcm9w 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