[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


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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