Question about GLEW.

[FireInDark]

I use GLEW on MS-Windows.
It's helpful and do many works ..

But ,till now,I can't find a way to init GLEW without creating a HGLRC and it also means I should create a window first..

Without the help of GLEW I can't use the the new functions newer than OpenGL 1.1 on MS-Windows such a glGenBuffers or others..

But I really don't want to create a window before I render to the FBOs,any way ?

May be we can find the functions from the driver's dll file of display card but I thinks it's not a right way to me..

[nigels]

You need an OpenGL context to initialize GLEW - a HGLRC shouldn't be necessary.
Are the useful OpenGL functions that don't require an OpenGL context these days?

- Nigel

[FireInDark]

Yet It's true - a OpenGLContext..
But if there's now HGLRC I can't use the functions for create FBO or other object.
Then I have no other way to create a context for initing GLEW..
With out the help of GLEW I can't find a way to use the new functions...

You need an OpenGL context to initialize GLEW - a HGLRC shouldn't be necessary.
Are the useful OpenGL functions that don't require an OpenGL context these days?

- Nigel

[nigels]

Yes, you're stuck. I'd point to it a bit more being a Windows limitation, than a GLEW one, is all.

- Nigel

[FireInDark]

Yes, you're stuck. I'd point to it a bit more being a Windows limitation, than a GLEW one, is all.

- Nigel

Will you please show me the right way to render scence without creating a "window"?
You know Ms-Windows only support OpenGL 1.1 by default .
So I need to find a way to use the functions supplied by OpenGL 3.xx or 4.xx
Yes,GLEW show me the way but I must create a OpenGL context first then init glew then glew show me the functions .
I have to create a window then get the dc then create the OpenGL context .. Such a rolling ,I'm rolling in the deep...

Any way directly ?

[Alfonse Reinheart]

You must create a window in order to create an OpenGL context. Any attempt to destroy this window will also destroy the OpenGL context.

You can try to use this context to create a windowless context (a pbuffer), but really, you could just create it minimized and remove it from the task bar if you don't want anyone to know you created it.