glutInit(3GLUT) GLUT glutInit(3GLUT) NAME glutInit - 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, be- cause 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 com- mand line options understood by the GLUT library. DESCRIPTION glutInit will initialize the GLUT library and negotiate a session with the window system. During this process, glutInit may cause the termination of the GLUT program with an error message to the user if GLUT cannot be prop- erly initialized. Examples of this situation include the failure to con- nect to the window system, the lack of window system support 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 pa- rameter 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 im- plementations support direct rendering contexts). A fatal error is generated if direct rendering is not supported by the OpenGL imple- mentation. If neither -indirect or -direct are used to force a particular be- havior, 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 gluEr- rorString. 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, glutMainLoop AUTHOR Mark J. Kilgard (mjk@nvidia.com) GLUT 3.7 glutInit(3GLUT)
NAME | SYNTAX | ARGUMENTS | DESCRIPTION | X IMPLEMENTATION NOTES | SEE ALSO | AUTHOR
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=glutInit&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>