Canvas rendering issue




Canvas: 2D
5 years ago
5 years ago


(Reporter: Kirill, Unassigned)


22 Branch
Windows 8

Firefox Tracking Flags

(Not tracked)




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 :
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:

Could you attach a screenshot of the rendering issue.

In addition, are you able to reproduce the issue with a clean profile?
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

Comment 3

5 years ago

here is the image:

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. 

Flags: needinfo?(pkirill)
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