Crash when executing glTextureImage2DEXT

[phoenicyan]

I have not been able to find a way to resolve the issue. Sample program just crashes at call to glTextureImage2DEXT.

[mdemoret]

I ran into this issue this week as well. It was odd since I had run this code before without any issues.

I finally figured out that my laptop had switched to the integrated Intel graphics card which could only make a OpenGL 4.4 context and didn't have the EXT_direct_state_access extension necessary for glTextureImage2DEXT to work.

If your issue can be fixed by using the dedicated GPU (which was the case for me), just export this symbol to force your machine to use the dedicated card:

extern "C" {
    _declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
}

Otherwise I would suggest switching the glTextureImage2DEXT and glTextureParameterf method to use the older style glTexImage2D and glTexParameterf methods.