1072347 - Unexpected clipping for certain values rotateX and perspective

Status: NEW

(Core :: Layout, defect)

Description

[hughperson]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0
Build ID: 20140917194002

Steps to reproduce:

http://jsfiddle.net/yNfQX/104/


Actual results:

This example shows nothing on the last firefox and works on safari/chrome
If you set the size of the pane to 3883px/3883px (or change perspective value to 1001px) it works on firefox too

Comment 1

[Loic]

Attachment: 1072347.html (testcase with "perspective: 1000px")

Comment 2

[Loic]

Attachment: 1072347.html (testcase with "perspective: 1001px")

Comment 3

[Loic]

I tested in FF34+ and the grey pane is visible after the page loaded, but it disappears after scrolling a little when its upper line reaches the top of the Firefox tab.

Could you install Aurora and test, please.
https://www.mozilla.org/en-US/firefox/aurora/all/

Comment 4

[Loic]

Partial working range:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=0894d2cdb16d&tochange=e743fd8c57ed

My guess is it's bug 1022612 which has improved the rendering.

Comment 5

[hughperson]

Works in aurora hoorayyy!! Thanks all :)

Comment 6

[Loic]

It's not a dupe, clipping is still here after scrolling to bottom.

Comment 7

[Evan Wallace [:evanw]]

Attachment: bug.html

I just hit this too (repro case attached). I'm trying to create a static animation (no scrolling like the other repro) and I've had to disable it in Firefox because of this bug. Is there any known workaround? Or any plans to fix this bug?

Comment 8

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

It's not clear to me what the bug is from the description, but seems entirely possible that bug 1198135 will help.

(It would be nice if somebody would describe the expected results from the testcases, and how they differ from the actual results.  No need for anything longer than this paragraph if it's reasonably simple.)

Comment 9

[Loic]

David, open both testcases I attached and scroll down.
With the testcase "perspective: 1000px", the gray element disappears after scrolling down a little when its upper line reaches the top of the viewport.