glutpostredisplay(3glut) [osx man page]

glutPostRedisplay(3GLUT)					       GLUT						  glutPostRedisplay(3GLUT)

NAME

       glutPostRedisplay, glutPostWindowRedisplay - marks the current or specified window as needing to be redisplayed.

SYNTAX

       #include <GLUT/glut.h>

       void glutPostRedisplay(void);
       void glutPostWindowRedisplay(int win);

DESCRIPTION

       glutPostRedisplay  marks the normal plane of current window as needing to be redisplayed.  glutPostWindowRedisplay works the specified win-
       dow as needing to be redisplayed.  After either call, the next iteration through glutMainLoop, the window's display callback will be called
       to  redisplay  the window's normal plane. Multiple calls to glutPostRedisplay before the next display callback opportunity generates only a
       single redisplay callback.  glutPostRedisplay may be called within a window's display or overlay display callback to  re-mark  that  window
       for redisplay.

       Logically, normal plane damage notification for a window is treated as a glutPostRedisplay on the damaged window. Unlike damage reported by
       the window system, glutPostRedisplay will not set to true the normal plane's damaged status (returned by glutLayerGet(GLUT_NORMAL_DAMAGED).

       If the window you want to post a redisplay on is not already current (and you do not require it to  be  immediately  made  current),  using
       glutPostWindowRedisplay is more efficient that calling glutSetWindow to the desired window and then calling glutPostRedisplay.

SEE ALSO

       glutPostOverlayRedisplay, glutDisplayFunc

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)

GLUT
									3.7						  glutPostRedisplay(3GLUT)

glutDisplayFunc(3GLUT)						       GLUT						    glutDisplayFunc(3GLUT)

NAME

       glutDisplayFunc - sets the display callback for the current window.

SYNTAX

       #include <GLUT/glut.h>

       void glutDisplayFunc(void (*func)(void));

ARGUMENTS

       func	 The new display callback function.

DESCRIPTION

       glutDisplayFunc	sets  the  display callback for the current window.  When GLUT determines that the normal plane for the window needs to be
       redisplayed, the display callback for the window is called. Before the callback, the current window is set to  the  window  needing  to	be
       redisplayed  and (if no overlay display callback is registered) the layer in use is set to the normal plane. The display callback is called
       with no parameters. The entire normal plane region should be redisplayed in response to the callback (this includes  ancillary  buffers	if
       your program depends on their state).

       GLUT  determines  when the display callback should be triggered based on the window's redisplay state. The redisplay state for a window can
       be either set explicitly by calling glutPostRedisplay or implicitly as the result of window damage reported by the window system.  Multiple
       posted redisplays for a window are coalesced by GLUT to minimize the number of display callbacks called.

       When  an  overlay is established for a window, but there is no overlay display callback registered, the display callback is used for redis-
       playing both the overlay and normal plane (that is, it will be called if either the redisplay state or overlay redisplay state is set).	In
       this case, the layer in use is not implicitly changed on entry to the display callback.

       See glutOverlayDisplayFunc to understand how distinct callbacks for the overlay and normal plane of a window may be established.

       When  a window is created, no display callback exists for the window. It is the responsibility of the programmer to install a display call-
       back for the window before the window is shown. A display callback must be registered for any window that is shown.  If	a  window  becomes
       displayed  without  a  display  callback being registered, a fatal error occurs. Passing NULL to glutDisplayFunc is illegal as of GLUT 3.0;
       there is no way to ``deregister'' a display callback (though another callback routine can always be registered).

       Upon return from the display callback, the normal damaged state of the window (returned	by  calling  glutLayerGet(GLUT_NORMAL_DAMAGED)	is
       cleared.  If  there  is	no  overlay  display  callback	registered the overlay damaged state of the window (returned by calling glutLayer-
       Get(GLUT_OVERLAY_DAMAGED) is also cleared.

SEE ALSO

       glutCreateMenu, glutPostRedisplay, glutOverlayDisplayFunc

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)

GLUT
									3.7						    glutDisplayFunc(3GLUT)