From cbca8ac9cefa125bd877871b9236845d1262263e Mon Sep 17 00:00:00 2001 From: Richard Rauch Date: Sat, 11 Oct 2003 07:44:02 +0000 Subject: [PATCH] Check the glutDisplayFunc() callback for being a NULL pointer. This is illegal and is disallowed in GLUT 3.0+, so we disallow it too in freeglut 2.0.1+ git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@221 7f0cb862-5218-0410-a997-914c9d46530a --- src/freeglut_callbacks.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/freeglut_callbacks.c b/src/freeglut_callbacks.c index 90baf10..da06283 100644 --- a/src/freeglut_callbacks.c +++ b/src/freeglut_callbacks.c @@ -48,6 +48,9 @@ */ void FGAPIENTRY glutDisplayFunc( void (* callback)( void ) ) { + if( !callback ) + fgError ("Fatal error in program. NULL display callback not " + "permitted in GLUT 3.0+ or freeglut 2.0.1+\n"); SET_CALLBACK( Display ); /* -- 1.7.10.4