Bf Em
 pname
Ef 
     The parameter value to be returned
 
 - 
Bf Sy
 GLUT_GAME_MODE_ACTIVE
Ef 
 
Return non-zero if we are presently in gamemode.
 - 
Bf Sy
 GLUT_GAME_MODE_POSSIBLE
Ef 
 
Return whether the requested gamemode settings are viable.
(May also actually change the mode?)  Does not necessarily
tell you whether entering gamemode will have any effect.
 - 
Bf Sy
 GLUT_GAME_MODE_WIDTH
Ef 
 
Return the game mode width. (in pixels)
 - 
Bf Sy
 GLUT_GAME_MODE_HEIGHT
Ef 
 
Return the game mode height. (in pixels)
 - 
Bf Sy
 GLUT_GAME_MODE_PIXEL_DEPTH
Ef 
 
Return the game mode pixel depth. (in bits)
 - 
Bf Sy
 GLUT_GAME_MODE_REFRESH_RATE
Ef 
 
Return the game mode vertical refresh frequency. (in Hz)
 - 
Bf Sy
 GLUT_GAME_MODE_DISPLAY_CHANGED
Ef 
 
Return non-zero if we are presently in gamemode.
(Same as 
Bf Sy
 GLUT_GAME_MODE_ACTIVE.)
Ef 
 
If 
Bf Sy
 pname
Ef 
 is unknown, a warning is printed and a value of
 -1 is returned.
OpenGLUT intrepretation of GLUT_GAME_MODE_DISPLAY_CHANGED