glGetString(GL_VERSION) version detect problem.

OpenGL OpenGL: Basic Coding
1

Anyone got a clue why glGetString(GL_VERSION) would be sending back a single “0” instead of the version it should be? This is on WinXP Home Edition. Everything works, I just wanted to put some detection in for systems that do not support 1.2 and above.

Thanks,

2

Do you have a rendering context?

3

Sorry I don’t understand?
What I want to do is determine the OpenGL level supported on a machine before the main program starts.

4

For any OpenGL-function to work, you need to have a rendering context. You usually create a rendering contex when you create a window. So in short, you need to create a window before you can call glGetString.

5

You can’t. You must have a rendering context and it must be current for gl functions not to error.

6

Ok, Understood. This means that I’ll have to create the context then do the test to see which verision is supported.

thanks,

7

Thanks, guys now all I get is the number
“1767548376”. I’m doing this under VB.
As always your help is appreciated.

Thanks,

8

Show a little code snippet of the context creation through the call to glGetString.

The function returns a string not a number.

[This message has been edited by shinpaughp (edited 03-17-2003).]

9

Thanks fella’s but I finally got it. All of a sudden the light in the fridge came on. The number that is returned is the pointer to the string. So I just used a couple of apis to retrive and converts the pointer to a VB string and <Bam> got the string I needed.

Thanks again,