Canvas rendering issue

UNCONFIRMED
Unassigned

Status

()

Core
Canvas: 2D
UNCONFIRMED
5 years ago
5 years ago

People

(Reporter: Kirill, Unassigned)

Tracking

22 Branch
x86_64
Windows 8
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

(Reporter)

Description

5 years ago
User Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; .NET4.0E; .NET4.0C; Media Center PC 6.0)

Steps to reproduce:

Render one canvas (3D) as background and another canvas (2d) on top of it.
To reproduce 
0. open my web site and login : http://space.delightex.com
1. create a space
2. drag a man from Objects drop down to the field
3. select the man
4. press Edit button in the bottom toolbar to start editing the man`s description



Actual results:

Background canvas sometimes appears in all black color despite there were no more rendering were performed on it.


Expected results:

It sound persist the last rendering result. It is a regression, version 21 works as expected.

Comment 1

5 years ago
I don't see the issue, I see that: http://i.imgur.com/wVb6750.jpg

Could you attach a screenshot of the rendering issue.

In addition, are you able to reproduce the issue with a clean profile?
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
Component: Untriaged → Canvas: 2D
Flags: needinfo?(pkirill)
Product: Firefox → Core

Comment 2

5 years ago
For bug triagers, I created this account to test:
U: bugzilla
P: azerty
(Reporter)

Comment 3

5 years ago
Hi, 

here is the image: http://i.imgur.com/0W5FhrU.png

After some experiments I found that the issue happens extremely rarely in normal situations. However happens very frequently under GWT debug session.

I tried a clean profile (my old one was also an almost clear test profile). 
Nothing has changed. 

My guess that the issue happens during very high CPU load. 

I will investigate further and report any findings. 

Thanks
Flags: needinfo?(pkirill)
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