Enables or disables logical operation based on
   
    enable
   
   and specifies a mode,
   
    GL_CLEAR
   
   ,
   
    GL_SET
   
   ,
   
    GL_COPY
   
   ,
   
    GL_COPY_INVERTED
   
   ,
   
    GL_NOOP
   
   ,
   
    GL_INVERT
   
   ,
   
    GL_AND
   
   ,
   
    GL_NAND
   
   ,
   
    GL_OR
   
   ,
   
    GL_NOR
   
   ,
   
    GL_XOR
   
   ,
   
    GL_EQUIV
   
   ,
   
    GL_AND_REVERSE
   
   ,
   
    GL_AND_INVERTED
   
   ,
   
    GL_OR_REVERSE
   
   , or
   
    GL_OR_INVERTED
   
   .