58515 2011-04-13 22:51:03 -0700 Translucent scrollbars on composited layers render incorrectly 2011-09-26 22:11:34 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Mac OS X 10.5 RESOLVED FIXED P2 Normal --- 1 jamesr simon.fraser bdakin sam simon.fraser oldest_to_newest 385535 0 jamesr 2011-04-13 22:51:03 -0700 See the attached test case. It appears that when the RenderLayer owning the scrollbars becomes composited we somehow render the translucent scrollbars twice on top of each other or something of the like. I can reproduce the issue in Chromium, WebKit nightlies, and minibrowser. The patch on bug 57202 ensures that this bug doesn't happen when the overflow controls are on their own layer, but it doesn't help when the controls are not. 385536 1 89537 jamesr 2011-04-13 22:52:15 -0700 Created attachment 89537 testcase This page has a div with overflow:auto with custom scrollbars set to rgba(0, 127, 0, 0.5). The div alternates between being composited and not composited every second. When it's composited, the scrollbar regions appear 'more green' then they should. 458598 2 simon.fraser 2011-08-29 17:43:39 -0700 Looks like this was cased by https://bugs.webkit.org/show_bug.cgi?id=23740 465085 3 106935 simon.fraser 2011-09-09 16:22:41 -0700 Created attachment 106935 Patch 473675 4 simon.fraser 2011-09-26 22:11:34 -0700 http://trac.webkit.org/changeset/96069 89537 2011-04-13 22:52:15 -0700 2011-04-13 22:52:15 -0700 testcase clip-content-under-overflow-controls.html text/html 841 jamesr PCFET0NUWVBFIGh0bWw+CjwhRE9DVFlQRSBodG1sPgo8c3R5bGU+Ci5jb21wb3NpdGVkIHsKICAt d2Via2l0LXRyYW5zZm9ybTogdHJhbnNsYXRlWigwKTsKfQoKLmNvbnRhaW5lciB7CiAgd2lkdGg6 MTAwcHg7CiAgaGVpZ2h0OjEwMHB4OwogIG92ZXJmbG93OnNjcm9sbDsKICByZXNpemU6Ym90aDsK ICBwb3NpdGlvbjphYnNvbHV0ZTsKfQoKLmNvbnRhaW5lcjo6LXdlYmtpdC1zY3JvbGxiYXIgewog IGJhY2tncm91bmQtY29sb3I6IHJnYmEoMCwgMTI3LCAwLCAwLjUpOwp9CgouY29udGFpbmVyOjot d2Via2l0LXJlc2l6ZXIgewogIGJhY2tncm91bmQtY29sb3I6IHJnYmEoMCwgMTI3LCAwLCAwLjUp 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