/**
  * Sets a specified viewport.
  *
  * @param index the viewport to set
  * @param x the left viewport coordinate
  * @param y the bottom viewport coordinate
  * @param w the viewport width
  * @param h the viewport height
  */
 public static void glViewportIndexedf(int index, float x, float y, float w, float h) {
   long __functionAddress = getInstance().ViewportIndexedf;
   GL41.nglViewportIndexedf(index, x, y, w, h, __functionAddress);
 }