Zooming to 120% makes "seams" in header labels on wiki.mozilla.org

NEW
Unassigned

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()

Core
Layout
9 years ago
4 years ago

People

(Reporter: dholbert, Unassigned)

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x86
Linux
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(1 attachment)

(Reporter)

Description

9 years ago
STR:
 1. Load wiki.mozilla.org
 2. Zoom in twice (with ctrl and "+") to get to 120% zoom level

ACTUAL RESULTS:
 "Seams" appear at the right edges of the header label tabs for "Discussion" and "Page"

I've got a minimized testcase, which I'll post shortly.
(Reporter)

Comment 1

9 years ago
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2a1pre) Gecko/20090622 Minefield/3.6a1pre
(Reporter)

Comment 2

9 years ago
Created attachment 384517 [details]
testcase 1

Here's a reduced testcase. Expected behavior is that no red pixels should be visible at any zoom level.

The background image is 7px wide, and it's essentially offset 6px to the right of the span (due to the "padding-right: 6px" rule).  So its leftmost pixel (which is red) should be covered by the span's background (which is green).

However, in current mozilla-central, I see a vertical line of red pixels after "foo" at these zoom levels:
 60% (partially red)
 90% (partially red)
120%
200%
270%
280%
(Reporter)

Comment 3

9 years ago
(BTW, the "Default Full Zoom Level" extension is handy for checking your current zoom level -- it displays it in the status bar)
I believe this is a existing bug - or something that came back.
(Reporter)

Comment 5

9 years ago
You might be thinking of bug 477157 -- this bug manifests in a similar way to that one, but the underlying cause is probably different (since no CSS borders are involved here).
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