SDL2 graphics drawing primitives and other support functions

Current version

sdl2_gfx requires the following formula to be installed:
sdl2 2.0.5 Low-level access to audio, keyboard, mouse, joystick, and graphics

Formula history

FX Coudert sdl2_gfx: drop universal
Tomasz Pajor sdl2_gfx 1.0.1
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Joel Burget sdl2_gfx 1.0.0