OpenGL version problems give cryptic errors

[paroj]

Originally reported by: James Edgar (Bitbucket: j1s1e1, GitHub: j1s1e1)

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Great tutorials. The opengl version testing fails with crypitc errors on some linux systems. If I just try to run the tutorial, I get this:

X Error of failed request: GLXBadFBConfig
Major opcode of failed request: 153 (GLX)
Minor opcode of failed request: 34 ()
Serial number of failed request: 34
Current serial number in output stream: 33

It might be helpful to check the versions before switching to the 3,3 context. Something like this:

#define add_test 1
#ifdef add_test
glutCreateWindow("test");
glutFullScreen();
glload::LoadFunctions();
int major_version =  glload::GetMajorVersion();
printf("OpenGL version supported by this platform (%d): \n", glload::GetMajorVersion());
if (major_version < 3)
{
     printf("Main version too low, Exiting");
    exit(1);
}
else
{
    printf("Continuing");
}
#endif

before

glutInitContextVersion (3, 3);

gives a much clearer error.

Thanks,

James

OpenGL version supported by this platform (2):
Main version too low, Exiting

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• Bitbucket: https://bitbucket.org/alfonse/gltut/issue/114