966509 - wrong stacking of 3D-transformed elements

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[Florian Bender]

Attachment: stacking issues with CSS 3d slinky (hightlights mine)

1. Goto URL
2. Goto slide 7 (with the CSS/DOM slinky) using the right-arrow key (needs quite some key presses to get there). 
3. Play through the different views/animations on slide 7 with the right-arrow key.
4. Watch what happens with the slinky's rings: some are drawn above others while they should actually not. This is mostly good during transitions/animations but most of the time breaks when animation completed. 

See attached screenshot (I have highlighted some parts of the screenshot).

Comment 1

[Florian Bender]

Attachment: screenshot: wrong stacking for 3d-transformed elements

Comment 2

[Florian Bender]

Attachment: garbled slinky

The slinky can get totally garbled, I saw this during mozregression around 2013-12-05 to 2013-12-15, iirc. Don't know if this is a separate issue, if this has been fixed now, so if anybody notices anything like that in later versions, please comment or file a new bug.

Comment 3

[Florian Bender]

Last good nightly: 2013-12-07
First bad nightly: 2013-12-08

Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=42b2a2adda8f&tochange=edac8cba9f78


Graphics:

Device ID	0x 166
GPU Accelerated Windows	1/1 OpenGL (OMTC)
Vendor ID	0x8086
WebGL Renderer	Intel Inc. -- Intel HD Graphics 4000 OpenGL Engine
windowLayerManagerRemote	true
AzureCanvasBackend	quartz
AzureContentBackend	quartz
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0

Comment 4

[Markus Stange [:mstange]]

(In reply to Florian Bender from comment #3)
> Last good nightly: 2013-12-07
> First bad nightly: 2013-12-08
> 
> Pushlog:
> http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=42b2a2adda8f&tochange=edac8cba9f78

Probably bug 947467, then.

Comment 5

[Matt Woodrow (:mattwoodrow)]

Is this fixed now? I can't reproduce it.

Comment 6

[Timothy Nikkel (:tnikkel)]

I was able to reproduce some obvious problems here in the latest nightly, although they might look a little different from the attached screenshots.

Comment 7

[Florian Bender]

This issue seems fixed, at least the testcase renders fine. There's still a slight issue with (partially) hidden elements, but that's not part of this bug. 

Any idea which bug fixed this?

Comment 8

[Timothy Nikkel (:tnikkel)]

fix range
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c150845d077d&tochange=1f170f9fead0
although this conflicts with comment 6, so I'm confused.
Bug 952011 in that range looks likely.