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Issue 593364 link

Starred by 1 user
Status: WontFix
Owner: ----
Closed: Apr 2016
Cc:
█ kbr@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug-Regression



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Javscript console reports spurious warning of "no texture bound"

Reported by eno...@onshape.com, Mar 9 2016 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.103 Safari/537.36

Steps to reproduce the problem:
1. navigate to: https://cad.onshape.com/documents/80749f31dad444bea395d55d/w/560ae7d829caddccfeed01e7/e/277e3887d03ad05fe2ce38da 
2. log in (contact bug author privately if you need credentials)
3. open the javsacript console
4. observe this warning on each re-draw of the frame:  "[.CommandBufferContext]RENDER WARNING: there is no texture bound to the unit 1"

What is the expected behavior?
I expect no warnings to show up.

What went wrong?
In previous versions of Chrome, no javascript warning is reported regarding texture binding.  I put a break point in javascript right after the warning occurs and interrogated the GL state.  It appears that there is a texture bound to unit 1, despite the warning.

There do not appear to be any user-visible issues, despite the warning, which makes me think the warning is spurious.

Did this work before? Yes Chrome 48.0.2564.103

Chrome version: 50.0.2661.18  Channel: dev
OS Version: OS X 10.11.3
Flash Version: Shockwave Flash 20.0 r0

Note: you may find other errors in the console in Chrome 50.  This issue has been fix in Chrome 51 and is logged separately.  See:  https://bugs.chromium.org/p/chromium/issues/detail?id=591063 for more information.

Comment 1 by erikc...@chromium.org, Mar 15 2016

Cc: kbr@chromium.org
Components: Internals>GPU
Status: Available (was: Unconfirmed)
This warning comes from:
https://code.google.com/p/chromium/codesearch#chromium/src/gpu/command_buffer/service/gles2_cmd_decoder.cc&q=%22there%20is%20no%20texture%20bound%20to%20the%20unit%22&sq=package:chromium&type=cs&l=7747

I also ran into it when enabling IOSurfaces for WebGL. I suspect it is spurious, but have not investigated in depth.

Comment 2 by eno...@onshape.com, Apr 28 2016 

I dug a little further and discovered that there was no texture bound to the unit at the time of draw.  In the shader that uses the texture, this is not a problem because the result of the sample is not used in that case.  However, I can understand how in general having a null texture bound could be problematic, as there does not seem to be specified behavior for those samples.  I "fixed" this on my end by ensuring there is always a texture bound, whether it ends up being used or not.  

I consider this issue resolved.

Comment 3 by kbr@chromium.org, Apr 29 2016

Components: Blink>WebGL
Status: WontFix (was: Available)
OK. Assuming this is fully an application bug, closing as WontFix.
►

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