80409 - Black background in transparent images while scrolling document.

Status: VERIFIED DUPLICATE of bug 77914

(Core :: Graphics: ImageLib, defect)

Description

[Lewis Jardine]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9) Gecko/20010505
BuildID:    2001050515

Using an ATI rage pro turbo, 4.11.2560 (8mb) at 800x600, 32 bit colour, some
images display incorrectly when the document is scrolled, with a black image
that seems to be the same as the original displayed (sometimes repeatedly)
behind the original image. If the image is half-on the screen, it seems to
'tear' at the interface between the half that is scrolled back on and the half
that never left. Other windows can be positioned over the artifacts to make them
go away.

This seems to be new for 0.9 . It may be related to bug 21981 

Reproducible: Always
Steps to Reproduce:
1. Using an ATI rage pro, 4.11.2560 (and possibly others)
2. Go to www.everything2.com
3. scroll down so that the 'everything 2' logo leaves the screen.
4. scroll back up slowly.
5. everything 2 logo now has black artifacts behind it.

6. scroll down so that the 'everything 2' logo leaves the screen.
7. scroll back up quickly
8. no artifacts.

9. scroll down so that half of the 'everything 2' logo is on screen.
10. scroll back up slowly.
11. artifacts.

12. alt-tab to another window which covers the corrupted logo
13. artifacts go away in the region the window covered.

Comment 1

[Chris Petersen]

 Changing component

Comment 2

[Chris Petersen]

Changing QA contact

Comment 3

[[e-mail]]

WFM

The image displays correctly for me.

OS: Win2k SP1
Moz Build: 2001051104 Win32 Talkback
User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9+) Gecko/20010511

Comment 4

[Matthias Versen [:Matti]]

This should be a dupe.
Please reopen if you disagree !

*** This bug has been marked as a duplicate of 77914 ***

Comment 5

[Terri Preston]

Verified Duplicate