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glutreporterrors(3glut) [osx man page]

glutReportErrors(3GLUT) 					       GLUT						   glutReportErrors(3GLUT)

glutReportErrors - for debugging purposes; prints out OpenGL run-time errors. SYNTAX
#include <GLUT/glut.h> void glutReportErrors(void); DESCRIPTION
This routine prints out any OpenGL run-time errors pending and clears the errors. This routine typically should only be used for debugging purposes since calling it will slow OpenGL programs. It is provided as a convenience; all the routine does is call glGetError until no more errors are reported. Any errors detected are reported with a GLUT warning and the corresponding text message generated by gluEr- rorString. Calling glutReportErrors repeatedly in your program can help isolate OpenGL errors to the offending OpenGL command. Remember that you can use the -gldebug option to detect OpenGL errors in any GLUT program. SEE ALSO
glutInit, glutCreateWindow, glutInitDisplayMode, gluErrorString, glGetError AUTHOR
Mark J. Kilgard ( GLUT
3.7 glutReportErrors(3GLUT)

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glutInit(3GLUT) 						       GLUT							   glutInit(3GLUT)

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, 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. DESCRIPTION
glutInit will initialize the GLUT library and negotiate a session with the window system. During this process, glutInit may cause the ter- mination of the GLUT program with an error message to the user if GLUT cannot be properly initialized. Examples of this situation include the failure to connect 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 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, glutMainLoop AUTHOR
Mark J. Kilgard ( GLUT
3.7 glutInit(3GLUT)
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