Re: need help with strange texture object problem

 Hi Chris,

I finally got back to my Mac and had time to follow up on your suggestion.
I attached the OpenGL profiler to my application and played with the 
program until I could reproduce the problem.
I had set the OpenGL Profiler to break

a) on errors
b) on thread conflicts
c) on VAR error
d) after each call to glTextImage2D

I can see that all the right calls to gltextImage2D are made (2 per 
render pass, one with the proxy target and one with the final image 
data), I can see that after the second call with the image data, the 
Profiler displays the correct texture image.

After maybe 20 times I got the error again where the Profiler displayed 
a different textue from what I saw on the screen, but the profiler never 
stopped because of an error, only after the glTextImage2D calls.

I also added some debug output to my application to print the OpenGL 
context pointer and I could see that the context never changes.

I know, this must be a very stupid mistake I am making, so again, would 
you know of any method that invalidates a texture object besides 
glDeleteTextures? There must be a reason that sometimes glIsTexture 
returns GL_FALSE, although the texture was created and bound before and 
no glDeleteTextures has been called in between.

I am probably looking for all the wrong things, but I really ran out of 
ideas what else to check.

Thank you very much again for your help

Ralph


On 10/5/10 9:39 AM, Chris Niederauer wrote:
> Can you try running with "Break on Thread Error" in OpenGL Profiler?
> There has to be some sort of OpenGL calls or memory stomper for IsTexture to 
> suddenly change.  That data structure is non-trivial so a call to OpenGL seems 
> much more likely.
>
> Thanks,
> Chris
> Sent from my iPad

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