104877 - Clipping issues with transparent floating dealies

Status: RESOLVED WORKSFORME

(Core Graveyard :: GFX, defect, P2)

Description

[Mike Schiraldi]

Floating thingies, like the one on the upper right of that URL, seem to have
some clipping issues. If i scroll up and down, i get temporary artifacts like
the ones visible in the screenshots i'm about to attach.

Comment 1

[Mike Schiraldi]

Attachment: See how it's all screwy behind the transparent dealie?

Comment 2

[Mike Schiraldi]

Attachment: This one's screwey on the left side of the page

Comment 3

[harishd]

sounds like layout.

Comment 4

[Boris Zbarsky [:bzbarsky]]

Mike, what build are you using?  Are you seeing really slow scrolling on that
page too?

Comment 5

[Mike Schiraldi]

Sorry, i thought Moz would automatically fill that in. It's the latest nightly: 

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.5+) Gecko/20011012, build 2001101508

The page doesn't seem terribly slow, but there is a slight latency on the
background as seen through the transparent thingie:

1. I scroll
2. The background updates immediately, except the background as seen through the
transparent floating dealie
3. Slight pause (~250 ms)
4. The background, as seen through the transparent floating dealie, is updated

Comment 6

[Boris Zbarsky [:bzbarsky]]

sounds like a painting bug...

Comment 7

[Marc Attinasi]

At least we lay the page out correctly! But it is really slow to repaint that
transparent floating DIV. It has it's own window and we have to recomposite that
window with the contents behind it and in doing so blend the bitmaps - ech.
Maybe there is some clipping optimizations we can do to speed it up though. I
wonder if the size of the transparent fixed item makes any difference - I have a
hunch it does not. testcase anyone?

Comment 8

[Kevin McCluskey (gone)]

Bulk moving Mozilla1.01 bugs to future-P1. I will pull from the future-P1 list
to schedule bugs for post Mozilla1.0 milestones

Comment 9

[Kevin McCluskey (gone)]

WFM: Using 2002070204 build on WinXP. This issue should also have been fixed for
Linux. dcone fixed the transparent menu which was rendered as a tiled background
png with opacity.