1190073 - WebGL - copyTexImage2D problem when drawing into textures

Status: RESOLVED WORKSFORME

(Core :: Graphics: CanvasWebGL, defect)

Description

[Ivan Kuckir]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.125 Safari/537.36

Steps to reproduce:

Go to http://www.ivank.net/veci/gltest.html


Actual results:

Result in Firefox is different than in Chrome (you can see it).


Expected results:

Result from Chrome was expected (and I think is the correct one). Firefox for Android also has correct results. The problem may be between FF and Angle.

Source code is commented, so you can understand what is happening. I suspect that draw / copy / draw / copy calls are executed on GPU in a wrong order.

Comment 1

[Loic]

Could you attach a screenshot of the rendering in Chrome, please.

Comment 2

[Ivan Kuckir]

Here are the screenshots:  http://www.ivank.net/veci/gltest_screen.png

Comment 3

[Loic]

On Win 7 with FF39, I have the same rendering as you for Chrome: http://i.imgur.com/a3AoQBU.jpg

For FF42 (Nightly), it's different (same as you have for Firefox).

Comment 4

[Ivan Kuckir]

I have wrong renderings in both Firefox 39 and Firefox Nightly 42.0a1 on Windows 7. Only Firefox for Android has correct results.

Can somebody fix it? I am going to publish my app, which uses this WebGL feature, and I want it to work in Firefox too.

Comment 5

[Ivan Kuckir]

Just want to show you the consequences of this bug, which is still present even in Firefox 41. 

I used copyTexImage2D in my image editor http://www.photopea.com and here is what I see in Firefox: http://imgur.com/kz970kO

Comment 6

[Kelsey Gilbert [:jgilbert]]

I get the same for Nightly and Canary.

If you still get different results, please attach a copy of the "Graphics" section from about:support.