glutInit(3GLUT) GLUT glutInit(3GLUT)NAMEglutInit - initialize the GLUT library.
SYNTAX
void glutInit(int *argcp, char **argv);
ARGUMENTS
argcp A pointer to the program's unmodified argc variable from
main. Upon return, the value pointed to by argcp will be
updated, because glutInit extracts any command line options
intended for the GLUT library.
argv The program's unmodified argv variable from main. Like argcp,
the data for argv will be updated because glutInit extracts
any command line options understood by the GLUT library.
DESCRIPTIONglutInit will initialize the GLUT library and negotiate a session with
the window system. During this process, glutInit may cause the termina‐
tion of the GLUT program with an error message to the user if GLUT can‐
not be properly initialized. Examples of this situation include the
failure to connect to the window system, the lack of window system sup‐
port for OpenGL, and invalid command line options.
glutInit also processes command line options, but the specific options
parse are window system dependent.
X IMPLEMENTATION NOTES
The X Window System specific options parsed by glutInit are as follows:
-display DISPLAY
Specify the X server to connect to. If not specified, the value
of the DISPLAY environment variable is used.
-geometry WxH+X+Y
Determines where window's should be created on the screen. The
parameter following -geometry should be formatted as a standard
X geometry specification. The effect of using this option is
to change the GLUT initial size and initial position the same
as if glutInitWindowSize or glutInitWindowPosition were called
directly.
-iconic Requests all top-level windows be created in an iconic state.
-indirect
Force the use of indirect OpenGL rendering contexts.
-direct Force the use of direct OpenGL rendering contexts (not all GLX
implementations support direct rendering contexts). A fatal
error is generated if direct rendering is not supported by the
OpenGL implementation.
If neither -indirect or -direct are used to force a particular
behavior, GLUT will attempt to use direct rendering if possible
and otherwise fallback to indirect rendering.
-gldebug
After processing callbacks and/or events, check if there are
any OpenGL errors by calling glGetError. If an error is
reported, print out a warning by looking up the error code with
gluErrorString. Using this option is helpful in detecting
OpenGL run-time errors.
-sync Enable synchronous X protocol transactions. This option makes
it easier to track down potential X protocol errors.
SEE ALSO
glutCreateWindow, glutInitWindowPosition, glutInitWindowSize, glutMain‐
Loop
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutInit(3GLUT)
