85647 2012-05-04 11:49:56 -0700 box-shadow causes overlay scrollbars to be in the wrong position when element is composited 2012-09-07 17:49:00 -0700 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 thomas simon.fraser bdakin eric jamesr mitz simon.fraser webkit-bug-importer webkit.review.bot oldest_to_newest 616478 0 140290 thomas 2012-05-04 11:49:56 -0700 Created attachment 140290 reduced test case Using CSS `box-shadow` on an element that shows scrollbars (overflow: auto) can cause the scrollbars of the element to appear in the wrong position. A related problem is that in the provided reduced test case, enabling hardware acceleration for the parent element causes the child's scrollbars to disappear completely. This problem happens in both the latest release version of Chrome and in the Safari 5.2 beta (I could not test on Safari 5.1, but it is likely to be a problem there too). 616481 1 webkit-bug-importer 2012-05-04 11:52:16 -0700 <rdar://problem/11386222> 616485 2 simon.fraser 2012-05-04 11:57:40 -0700 I can't find any code that positions the scrollbar layers in RenderLayerBacking. Weird. 715005 3 162874 simon.fraser 2012-09-07 14:47:51 -0700 Created attachment 162874 Patch 715177 4 simon.fraser 2012-09-07 17:49:00 -0700 http://trac.webkit.org/changeset/127943 140290 2012-05-04 11:49:56 -0700 2012-05-04 11:49:56 -0700 reduced test case index.html text/html 1316 thomas PHN0eWxlPgojY29udGFpbmVyIHsKICBvdmVyZmxvdzogaGlkZGVuOwogIHBvc2l0aW9uOiBhYnNv bHV0ZTsKICBoZWlnaHQ6IDIwMDBweDsKICB3aWR0aDogMTAwJTsKICAvKiBlbmFibGluZyB0aGUg Zm9sbG93aW5nIGxpbmUgY2F1c2VzIHRoZSBzY3JvbGxiYXIgdG8gZGlzYXBwZWFyICovCiAgLyog LXdlYmtpdC10cmFuc2Zvcm06IHRyYW5zbGF0ZVooMCk7ICovCn0KCiNzY3JvbGxhYmxlIHsKICBw b3NpdGlvbjogYWJzb2x1dGU7CiAgb3ZlcmZsb3c6IGF1dG87CiAgcmlnaHQ6IDIwcHg7CiAgdG9w OiAyMHB4OwogIHdpZHRoOiAzMDBweDsKICBoZWlnaHQ6IDMwMHB4OwogIGZvbnQtc2l6ZTogNTBw eDsKICAvKiBkaXNhYmxpbmcgdGhlIGZvbGxvd2luZyBsaW5lIGNhdXNlcyB0aGUgc2Nyb2xsYmFy IHRvIGJlIGluIHRoZSBSSUdIVCBwb3NpdGlvbgogICAgIGV2ZW4gd2hlbiBody1hY2NlbCBpcyBv biAqLwogIGJveC1zaGFkb3c6IDBweCAwcHggMTAwcHggcmdiYSgyNTUsMCwwLDAuOCk7CiAgCiAg 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