[Webkit-unassigned] [Bug 12885] REGRESSION (r19696): Incomplete background repaint

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=12885





------- Comment #2 from mitz at webkit.org  2007-02-25 07:04 PDT -------
Created an attachment (id=13367)
 --> (http://bugs.webkit.org/attachment.cgi?id=13367&action=view)
Earlier regression with the same root cause

This test case demonstrates the root cause of the present bug, going back to
r11093 (fix for bug 5633), which is the inability of repaintAfterLayoutIfNeeded
to distinguish between overflow bounds and border box bounds.

In this test case, the div's "bounds" don't change at all, but what used to be
overflow becomes part of the border box. In the previously posted test case
(and in the URL), the "bounds" grow by a little (and the delta is repainted),
but unknown to repaintAfterLayoutIfNeeded, within those bounds, the border box
grows by a lot to occupy area previously occupied by overflow.


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