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glGetString()

Started by Cacks Sep 5, 2005 at 12:25 PM 2 replies 5.1k views

Original Post

141

Sep 5, 2005 at 12:25 PM

Hi guys, Im having trouble with glGetString(). Using VC++ 2003. Eg. My code is - const GLubyte* gl_vend = glGetString(GL_VENDOR); I'm getting a NULL pointer returned (Im using the debugger to look at the value). Any ideas on why it won't work? I don't think an extension is needed? Also, how would I go about casting gl_vend to a standard C++ string? Thanks for any help!

mikeman

545

mikeman

Sep 5, 2005 at 12:31 PM

Just a guess, but in order to execute any GL command you have to create a valid GL rendering context first. Have you done that?

Enigma

188

Enigma

Sep 5, 2005 at 12:42 PM

Quote:
Original post by Cacks
Also, how would I go about casting gl_vend to a standard C++ string?

std::string glVendor = reinterpret_cast< char const * >(glGetString(GL_VENDOR));

Enigma

Cacks

Author

141

Cacks

Sep 5, 2005 at 12:52 PM

mikeman, good guess, I haven't created a rendering context at all yet. I didn't realise a rendering context was needed for non-graphics displaying commands.

Enigma, I'll give that a try once I've created a rendering context.

Thanks for the help!!

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