png_set_cHRM

procedure png_set_cHRM(

  png_ptr: png_structp;

  info_ptr: png_infop;

  white_x: Double;

  white_y: Double;

  red_x: Double;

  red_y: Double;

  green_x: Double;

  green_y: Double;

  blue_x: Double;

  blue_y: Double

);