(defun make-shader ()
  (wheelwork::create-shader
   '(:vertex
     ((vert :vec2) (col :vec2))
     ()
     ((values
       (vari:vec4
        (* 0.008 vert) 0.0 1.0)
       col)))
   '(:fragment
     ((tc :vec2))
     ((tex :sampler-2d))
     ((* (vari:vec4 1.0 1.0 1.0 1.0) (aref (vari:texture tex tc) 0))))))

(defun start ()
  (sdl2:with-init (:everything)
    (sdl2:gl-set-attr :context-major-version 3)
    (sdl2:gl-set-attr :context-minor-version 3)
    (sdl2:gl-set-attr :context-profile-mask
                      sdl2-ffi:+sdl-gl-context-profile-core+)
    (sdl2:gl-set-attr :doublebuffer 1)
    (sdl2:with-window (window
                       :flags '(:shown :opengl)
                       :title "Font Example")
      (sdl2:with-gl-context (ctx window)
        (sdl2:gl-make-current window ctx)
        (gl:viewport 0 0 800 800)
        (gl:enable :depth-test)
        (let* ((font
                 (cl-fond:make-font
                  #P"~/projects/INACTIVE/wwb-haxe/Assets/Ticketing.ttf"
                  "ABCDEFGHJIJKLMNOPQRSTUVWXYZabcdefhgjijklmnopqrstuvwxyz0123456789 ,.!?:;-+/\\"))
               (shader
                 (make-shader)))
          (gl:program-uniformi shader (gl:get-uniform-location shader "TEX") 0)
          (multiple-value-bind (vao elems) (cl-fond:compute-text font "Hey Man")
            (print (list :vao vao :elems elems))
            (sdl2:with-event-loop (:method :poll)
              (:idle ()
                     (gl:clear-color 0.0 0.0 0.0 1.0)
                     (gl:clear :depth-buffer-bit :color-buffer-bit)
                     (gl:use-program shader)
                     (gl:active-texture 0)
                     (gl:bind-texture :texture-2d (cl-fond:texture font))
                     (gl:bind-vertex-array vao)
                     (%gl:draw-elements :triangles
                                        elems
                                        :unsigned-int 0)
                     (gl:bind-vertex-array 0)
                     (sdl2:gl-swap-window window)
                     (setf got-here t))
              (:quit ()
                     (gl:delete-vertex-arrays (list vao))
                     t))))))))