1254788 - Render error on animated GIFs

Status: NEW

(Core :: Graphics: ImageLib, defect, P3)

Description

[Axel]

Attachment: Animated GIFs are jumping around.wmv

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Build ID: 20160210153822

Steps to reproduce:

Years ago I created a JavaScript demonstration using animated GIFs.

Using the latest Firefox edition the animated GIFs aren't rendered correctly: When you move the mouse pointer across the background image, the animated GIFs are "jumping", i.e. they are occasionally rendered with an offset of approx. (-100px, -100px).


Actual results:

When you move the mouse pointer across the background image, the animated GIFs are "jumping", i.e. they are occasionally rendered with an offset of approx. (-100px, -100px).


Expected results:

The animated GIFs should be rendered steadily.

Comment 1

[Axel]

See attached short movie clip for a screencast demonstrating the issue.

Comment 2

[Loic]

Could you attach such a GIF to the bug report, please. (or provide a link to the GIF)

Comment 3

[Axel]

D'oh ... my fault.  8-0

I forgot to paste the link. Pardon me...

Here it is:

http://www.dashop.de/blog/en/dev/JavaScript/content/ImageShover/demo/ImageShover-Demo-Frame.html

Comment 4

[Loic]

Attachment: Animated GIFs are jumping around

Comment 5

[Loic]

Not a recent regression:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c8288d0c7a15&tochange=62d33e3ba514

Comment 6

[Alice0775 White]

regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=4511d9ac1000&tochange=79624417d247