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glutgamemodeget(3glut) [osx man page]

glutGameModeGet(3GLUT)						       GLUT						    glutGameModeGet(3GLUT)

glutGameModeGet - retrieves GLUT device information represented by integers. SYNTAX
#include <GLUT/glut.h> int glutGameModeGet(GLenum info); ARGUMENTS
info Name of game mode information to retrieve. GLUT_GAME_MODE_ACTIVE Non-zero if GLUT's game mode is active; zero if not active. Game mode is not active initially. Game mode becomes active when glu- tEnterGameMode is called. Game mode becomes inactive when glutLeaveGameMode is called. GLUT_GAME_MODE_POSSIBLE Non-zero if the game mode string last specified to glutGameModeString is a possible game mode configuration; zero otherwise. Being "possible" does not guarantee that if game mode is entered with glutEnterGameMode that the display settings will actually changed. GLUT_GAME_MODE_DISPLAY_CHANGED should be called once game mode is entered to determine if the display mode is actually changed. GLUT_GAME_MODE_WIDTH Width in pixels of the screen when game mode is activated. GLUT_GAME_MODE_HEIGHT Height in pixels of the screen when game mode is activated. GLUT_GAME_MODE_PIXEL_DEPTH Pixel depth of the screen when game mode is activiated. GLUT_GAME_MODE_REFRESH_RATE Screen refresh rate in cyles per second (hertz) when game mode is activated. Zero is returned if the refresh rate is unknown or cannot be queried. GLUT_GAME_MODE_DISPLAY_CHANGED Non-zero if entering game mode actually changed the display settings. If the game mode string is not possible or the display mode could not be changed for any other reason, zero is returned. DESCRIPTION
glutGameModeGet retrieves GLUT game mode information represented by integers. The info parameter determines what type of game mode informa- tion to return. Requesting game mode information for an invalid GLUT game mode information name returns negative one. SEE ALSO
glutGet, glutDeviceGet, glutLayerGet, glutGameModeString, glutEnterGameMode, glutLeaveGameMode AUTHOR
Mark J. Kilgard ( GLUT
3.7 glutGameModeGet(3GLUT)

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glutEnterGameMode(3GLUT)					       GLUT						  glutEnterGameMode(3GLUT)

glutEnterGameMode, glutLeaveGameMode - enters and leaves GLUT's game mode. SYNTAX
void glutEnterGameMode(void); void glutLeaveGameMode(void); DESCRIPTION
glutEnterGameMode is designed to enable high-performance fullscreen GLUT rendering, possibly at a different screen display format. Calling glutEnterGameMode creates a special fullscreen GLUT window (with its own callbacks and OpenGL rendering context state). If the game mode string describes a possible screen display format, GLUT also changes the screen display format to the one described by the game mode string. glutLeaveGameMode leaves the GLUT game mode and returns the screen display format to its default format. When game mode is entered, certain GLUT functionality is disable to facilitate high-performance fullscreen rendering. GLUT pop-up menus are not available while in game mode. Other created windows and subwindows are not displayed in GLUT game mode. Game mode will also hide all other applications running on the computer's display screen. The intent of these restrictions is to eliminate window clipping issues, permit screen display format changes, and permit fullscreen rendering optimization such as page flipping for fullscreen buffer swaps. After leaving game mode, the GLUT functionality disabled in game mode is available again. The game mode window (and its OpenGL rendering state) is destroyed when leaving game mode. Any windows and subwindows created before entering the game mode are displayed in their previ- ous locations. The OpenGL state of normal GLUT windows and subwindows is not disturbed by entering and/or leaving game mode. The following GLUT routines are ignored in game mode: glutFullScreen, glutSetWindowTitle, glutSetIconTitle, glutPositionWindow, glutRe- shapeWindow, glutPopWindow, glutPushWindow, glutIconifyWindow, glutShowWindow, glutHideWindow. glutEnterGameMode can be called when already in game mode. This will destroy the previous game mode window (including any OpenGL rendering state) and create a new game mode window with a new OpenGL rendering context. Also if glutEnterGameMode is called when already in game mode and if the game mode string has changed and describes a possible screen display format, the new screen display format takes effect. A reshape callback is generated if the game mode window changes size due to a screen display format change. Re-entering game mode provides a mechanism for changing the screen display format while already in game mode. Note though that the game mode window's OpenGL state is lost in this process and the application is responsible for re-initializing the newly created game mode win- dow OpenGL state when re-entering game mode. Game mode cannot be entered while pop-up menus are in use. Note that the glutEnterGameMode and glutFullScreen routines operate differently. glutFullScreen simply makes the current window match the size of the screen. glutFullScreen does not change the screen display format and does not disable any GLUT features such as pop-up menus; glutFullScreen continues to operate in a "windowed" mode of operation. glutEnterGameMode creates a new window style, possibly changes the screen display mode, limits GLUT functionality, and hides other applications. SEE ALSO
glutGameModeGet, glutGameModeString, glutInitDisplayString AUTHOR
Mark J. Kilgard ( GLUT
3.7 glutEnterGameMode(3GLUT)
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