Ensures that the @area framebuffer object is made the current draw
and read target, and that all the required buffers for the @area
are created and bound to the frambuffer.
This function is automatically called before emitting the
#GtkGLArea::render signal, and doesn't normally need to be called
by application code.
Ensures that the @area framebuffer object is made the current draw and read target, and that all the required buffers for the @area are created and bound to the frambuffer.
This function is automatically called before emitting the #GtkGLArea::render signal, and doesn't normally need to be called by application code.