GtkGLArea issues: context type, getProcAddress and key events

[ebassi (Emmanuele Bassi)]

@zah

how do i knows the type of gl context created by gtk, EGL or GLX?

GTK uses libepoxy, so you can use the libepoxy API, like epoxy_has_glx(), epoxy_has_egl(), etc.

In general, GTK will create GLX contexts under X11, and EGL contexts under Wayland.

@zah

is there a api like eglGetProcAddress and glXGetProcAddress?

Use libepoxy.

To be fair, though, I have no idea what you’re trying to achieve. You should not ever know what kind of underlying windowing system API created a GL context; if you want to check for windowing system-specific extensions, you can use epoxy_has_glx_extension(), epoxy_has_egl_extension(), or epoxy_has_wgl_extension() before using them, just like you’d use epoxy_has_gl_extension().