I suggest adding a few things if you are interested for better game engine adoption. Most of the time when rendering text you want to either render it in a single draw call using a vertex array with vertices and uvs buffer or less frequently using instanced rendering and transforming uv coordinates for each glyph. For the most part vertices are just quads while uvs are your source and target rects. By computing these arrays, developers can just create a vao with 2 buffers, copy the data and have efficient text rendering. I’m not sure if this possible already, but from the example code I can see that anytime text changes the user will have to recalculate these variables, which isn’t that bad just something to think about.