[Webkit-unassigned] [Bug 67203] Absolutely positioned div with canvas child does not move with parent div.
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Oct 3 15:52:35 PDT 2011
https://bugs.webkit.org/show_bug.cgi?id=67203
Vangelis Kokkevis <vangelis at chromium.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |enne at google.com,
| |mdelaney at apple.com,
| |simon.fraser at apple.com,
| |vangelis at chromium.org
--- Comment #3 from Vangelis Kokkevis <vangelis at chromium.org> 2011-10-03 15:52:35 PST ---
My first hunch was that the behavior was unrelated to canvas but had something to do with composited layers and absolute positioning. Replacing the outer canvas (rect_canvas) by a div with a translateZ(0) webkit transform still reproduces the problem. Further replacing the inner canvas (text_canvas) by a div makes the issue go away even though we still correctly get two composited layers.
I'm pretty sure that the recent behavior change is a result of the introduction of the accelerated canvas both Safari in 10.7 and Chrome version 15+.
CC-ing a couple more folks familiar with this part of the code.
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