Hello and welcome to the glium tutorials! This series of tutorials will teach you how to work with OpenGL thanks to the glium library. Glium's API uses the exact same concepts as OpenGL and has been designed to remove the burden of using raw OpenGL function calls, which are often non-portable, tedious and error-prone. Even if for some reason you don't plan on using the glium library in the future, these tutorials can still be useful as they will teach you how OpenGL and graphics programming in general work.