A simple 2d graphics library for C under Linux?

Question

linux

I am writing a programming textbook, I want to smoothly move from simple C to Java and OOP. But I haven’t worked in C for a long time, and now I would need a simple library for displaying lines, points, squares, painting these shapes, with buffering for animation - I don’t need more. So that there is no kilometer-long initialization code, as with OpenGL.
Preferably under Linux, but if anything goes under Windows.

Answer 1

SDL

Answer 2

OpenGL using wrappers like GLUT is delicious!

Answer 3

glfw