Closed Bug 61306 Opened 24 years ago Closed 24 years ago

Scaled animated GIFs cause seizures

Categories

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

Product:
Core
Component:
Graphics: ImageLib
Platform:
x86
Linux
Type:
defect

Tracking

()

Status:
VERIFIED WORKSFORME

People

(Reporter: kbriscoe, Assigned: karnaze)

References

(
URL
)

Details

(Whiteboard: [imglib])

If an animated GIF is set to width=10%, it causes a PNG (width=80%) on the same page to reload with every frame on the animated GIF, resulting in a stroboscopic effect. This only happens when BOTH images are scaled with a width= statement. I suspect this will work with any scaled animated image (GIF, MNG) and any scaled static image (GIF, PNG, JPG), but I haven't tested other combinations. I don't have a test case, but can create one if it would help. Easiest solution: criminalize animated GIFs.
Keith: can you put up a sample page somewhere with a simple test case for this? Thanks...
updating component.
Assignee: asa → pnunn
Component: Browser-General → ImageLib
QA Contact: doronr → tpreston
This looks like a layout/reflow issue. Reassigning to Nish. -p
Assignee: pnunn → nisheeth
Attached a URL example: http://www.nwlink.com/~cheeth/test.html The "strobing" effect is best seen if you save the files and graphics to your local drive and view it there, because of faster access times. Over the Internet, the strobing is more like an occasional flash. While creating this, I discovered that my initial analysis was incorrect and that these images must also be in a TABLE for this behavior to occur. I also can't figure out why the animated GIF is continuously sliding down the page in this example, and it may be a related bug.
URL: http://www.nwlink.com/~cheeth/test.html
WORKSFORME Platform: PC OS: Linux 2.2.16 Mozilla Build: 2000121908 M18 Trunk Build Marking as such. Reopen if you still see it on the latest nightlies
Status: UNCONFIRMED → RESOLVED
Closed: 24 years ago
Resolution: --- → WORKSFORME
Still getting same problems: Platform: PC OS: Linux 2.2.16-22 Mozilla Build: 2000122710 (Mtrunk) More info: RedHat 7.0, fairly vanilla install
Status: RESOLVED → UNCONFIRMED
Resolution: WORKSFORME → ---
Reporter what version of XWindows are you using? and what Window Manager? On Xfree 4.0.1 & KDE 2.0.1 I am not having any flickering. I saved locally and everything. Have you tried deleting your mozilla profile? Does that help?
I am seeing the problems as well, bottom image moves down the page while top image flashes I am using Redhat 6.2 with build 2001101220
Status: UNCONFIRMED → NEW
Ever confirmed: true
Deleting Mozilla profile does not correct the problem. I had been using XFree86 4.0 and KDE 1.3(?), whichever the ones are that ship with RedHat 7.0. Upgrading to KDE 2.01 did not solve the problem. Strange indeed.
This is a layout issue. Passing on to Chris Karnaze, the layout team's manager.
Assignee: nisheeth → karnaze
Now this is interesting, I don't see either image on this page in linux build 2001041205, changing status whiteboard to [imglib]
Whiteboard: [imglib]
I don't see *anything* on Linux build 2001042921 running on SuSE7 with Ximian-gnome 1.4
I just re-tested this for the first time in a very long time, and the problem no longer exists. Can anyone who also witnessed the bug verify that the bug got fixed?
This one seems fixed to me Marking WORKSFORME , please reopen if you dont think so Build 2001062823 linux
Status: NEW → RESOLVED
Closed: 24 years ago → 24 years ago
Resolution: --- → WORKSFORME
No seizures here linux build 2001070306, marking verified
Status: RESOLVED → VERIFIED
You need to log in before you can comment on or make changes to this bug.