Closed Bug 1074389 Opened 10 years ago Closed 10 years ago

Flashing scroll bar with B2G browser on http://mozilla.org/en-US/

Categories

(Core :: Graphics, defect)

Product:
Core
Component:
Graphics
Platform:
All
Gonk (Firefox OS)
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1070993

People

(Reporter: jrmuizel, Unassigned)

References

Details

(Keywords: regression) 

The scrollbar exhibits really bad behaviour on this page. Flashing a lot when you start scrolling.
What version of code are you running?
Also, does it only flash when you put your finger down? Or does it just keep flashing all the time?
OS: Linux → Gonk (Firefox OS)
Hardware: x86_64 → All
Flags: needinfo?(jmuizelaar)
(In reply to Kartikaya Gupta (email:kats@mozilla.com) from comment #1)
> What version of code are you running?

I was running a trunk flame-kk from the time the bug was filed.

It will flash even when my finger is not down. But the flashing tends to go away before the scroll ends.
Flags: needinfo?(jmuizelaar)
I repro'd it and it looks like the patch on bug 1070993 fixes it. Specifically what's happening is that if you pan horizontally on this page the scroll position ends up at a value that's a rounding error away from zero. That puts us in "checkerboarding" and we start drawing a white background behind various things such as the scrollbar and the animating text. The patch on bug 1070993 accounts for the rounding error and fixes the problem. This is a regression from bug 1013385.
Blocks: 1013385
Status: NEW → RESOLVED
Closed: 10 years ago
Keywords: regressionwindow-wanted
Resolution: --- → DUPLICATE
You need to log in before you can comment on or make changes to this bug.