On the many ways of displaying text inside a renderer.
GLyphy represents a SDF using actual vectors submitted to the GPU. This results in very high quality rendering, though at a much higher runtime cost.
Multi-Channel Distance Field Generator for Font Glyphs
This is a utility for generating signed distance fields from vector shapes and font glyphs.
ThinMatrix Single-Channel SDF Font Rendering
Two OpenGL tutorial videos that give an overview of the basics of setting up single-channel SDF font rendering. Video one covers basic bitmap text rendering, and video two shows how to convert from bitmap to SDF.
Video one: https://www.youtube.com/watch?v=mnIQEQoHHCU
Video two: https://www.youtube.com/watch?v=d8cfgcJR9Tk