87823 - Part of image of a Person holding PDA is flashing

Status: VERIFIED DUPLICATE of bug 22607

(Core :: Graphics: ImageLib, defect)

Description

[Roy Yokoyama]

Go to the URL
scroll down a bit
look for a person holding his PDA on the right.
Only part of image is updated and background image is black.

Comment 1

[Terri Preston]

Verifying, I see this behavior on w2k build 2001062603

Comment 2

[doctor__j]

Would this be a dupe of 22607?

Comment 3

[Mike Young]

I believe it is a dup. But it seems to be a little different in that while the
frame replacment is happening the transparency of the frame gets trashed. You
might just want to mark it as dependant so that we can see if they are the same
or just related.

Comment 4

[Mike Young]

Attachment: image in case page goes 404

Comment 5

[Mike Young]

This is a dup of bug 22607. The transparency is always trashed. We never
actually see transparency except for the first frame of the second loop. Here's
what happens...

First frame:  Man with frst PDA, mozilla merges background chunk because of bug
78114
Second frame: new PDA replaces just the hand portion. Background still not
transparent because the previous frame is "remove by nothing" and stays there
with merged background chunk and all.
Third.... Fifth frames: same as Second.

First Frame Second Loop: Transparency is finally drawn correctly. Since
backgound  is white you don't notice it.
Second Frame Second loop: New PDA is drawn, but remove-by-nothing command isn't
recognized and while the image remains, the transparency is rendered as black.
Everyframe thereafter has black instead of transparency except the first frame
of every loop.

*** This bug has been marked as a duplicate of 22607 ***

Comment 6

[Terri Preston]

Verified Duplicate