Christian Convey wrote:
> I'm porting to OS X 10.5 an app that works just fine on Linux. I'm using
> FLTK 1.1.7.
>
> We have a class (MarineViewer) that subclasses from Fl_Gl_Window. In
> MarineViewer's constructor, we have this code:
>
> m_textures = new GLuint[1];
> ...
> glGenTextures(1, m_textures);
>
> The call to glGenTextures is generating a bus error. I think it's related to
> something I found while debugging: If I call "this->context()" from within
> that same constructor, I get back the value NULL. I assume this means that
> for some reason, FLTK isn't able to get an OpenGL context for my program to
> use.
>
> Any idea why I might be seeing this? Any idea how I can fix it?
If the code you're running needs a valid gl context, try moving
this code to the !valid() section of your draw() method, eg:
void MarineViewer::draw() {
if ( ! valid() ) {
..
glGenTextures(1, m_textures);
..
}
}
By that time FLTK will have created the actual window and context.
I'm thinking FLTK doesn't actually create the GL window/context
until after the constructors have been called, and the program
has started the FLTK event loop.
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