I’m developing a game engine, that is currently unpopular, instead of trying to make the old API work with the new rendering system, I just decided to completely redo a lot of stuff. It was mandatory for the GUI subsystem as previously it was a spaghetti code of mess, now it’s a pretty well usable thing. It was less mandatory with the sprite and tile rendering, but I needed to adjust stuff to OpenGL, as previously it used the CPU.