We'd like to support Gio using a different renderer binding than
the builtin. A first step is to define the Functions interface
in package gl, and extract the concrete implementations to a
separate package.
Updates #26
Signed-off-by: Elias Naur <mail@eliasnaur.com>
macOS supports the OpenGL core profiles where glGetString(GL_EXTENSIONS)
is not supported. Use glGetStringi(GL_EXTENSIONS, <index>) instead.
The wrong query didn't make any practical difference because Gio doesn't
need any extensions on OpenGL 3 and better.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur