770257 - Graphic corruption in C&C Tiberium Alliances

Status: UNCONFIRMED

(Core :: Graphics: Canvas2D, defect)

Description

[rkornmann]

User Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; .NET4.0E; .NET4.0C)

Steps to reproduce:

Play the browser game C&C Tiberium Alliances: http://alliances.commandandconquer.com


Actual results:

After some time the grahic starts to missing elements. If it is the background image it get very ugly is the canvas is not cleared every frame.

Additional information that might be useful.

- The images are drawn with the drawImage method of the canvas.
- The source image elements are not attached to the DOM.
- It happens faster if you play Flash videos in another tab.
- You need to close the browser to fix it. Just reloading (even in nother tab) will not do the trick.

It looks like that for some reason the image is kicked (or in a corrupted state) from the image cache in memory. 

If you need additional information please ask.




Expected results:

The graphic should stay intact.

Comment 1

[Matthias Versen [:Matti]]

Please post the graphic section from about:support here.

Comment 2

[rkornmann]

Graphics
        
Adapter DescriptionNVIDIA GeForce 8800 GTX
Vendor ID0x10de
Device ID0x0191
Adapter RAM768
Adapter Drivers nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Driver Version8.17.12.8516
Direct2D Enabled true
DirectWrite Enabled true (6.2.8102.0)
ClearType Parameters
ClearType parameters not found
WebGL RendererGoogle Inc. -- ANGLE (NVIDIA GeForce 8800 GTX) -- OpenGL ES 2.0 (ANGLE 1.0.0.963)GPU Accelerated Windows1/1 Direct3D 10
AzureBackend direct2d

Comment 3

[(mostly gone) XtC4UaLL [:xtc4uall]]

I can see graphical Discrepancies Firefox <-> Chrome in a Nightly Build too, e.g. in the Options UI where the Sliders are Missing (Audio/Video Pane).

Reporter, are you an EA Representative?

I'd suggest (the Game Devs) filing different Bug Reports for different Issues with attached reduced Testcases regarding the Game running defectively in Firefox.

Comment 4

[rkornmann]

Yes, I am working for EA on this project.

There is already another bug open for this UI issues (build with CCS). We were already contacted how we should fix them.  

This problem here happens in the canvas parts of the game. I although needs some time before it happens. As said it happens faster if you play flash videos in another tap. unfortunately we don't have a reduced testcase that shows this problem. I can make a screenshot the next time it happens but it will just show that there are graphics missing that are painted to the canvas with a drawImage call. This problem was already in Firefox 12 but in general you need to have the game open for hours to get it. Now with the Firefox 13 it happens more faster. I know that without a good testcase that shows the problem in a fast and reproducible way it would be hard to find and fix.

Comment 5

[Kelsey Gilbert [:jgilbert]]

This sounds like Canvas2D.

Comment 6

[juan becerra [:juanb]]

Reporter, can you still reproduce this on the latest Windows 8 RTM and Firefox 16 (latest beta)?