[Plib-devel] glIsValidContext

[Bram S. <br...@sa...>]

Steve Baker wrote:

> So - the problem is that if we leave out the glIsValidContext check
> then programmers make this VERY common mistake - and don't notice it
> for months or years later - and blame it on us.
> 
> If we leave the glIsValidContext check in, then we sometimes fail
> on broken OpenGL implementations.
> 
> I prefer to leave the check in there and try to get OpenGL fixed
> wherever possible.

I would record the creation of a context in plib, and do your
context check as follows:

bool check_context()
{
   if (opengl thinks context is ok)
     return true;
   if (plib has not yet created context)
     WARNING: you should not use opengl without context. Fix your app.
     return false;
   WARNING: You are using a broken OGL implementation. Demand better drivers.
   return true;
}

Of course, the last warning, you want to print only
once, and not every time the context is checked for
validity.

   Bram