+#ifndef VG_RELEASE
+void vg_checkgl( const char *src_info )
+{
+ GLenum err;
+ while( (err = glGetError()) != GL_NO_ERROR )
+ {
+ vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
+ }
+}
+
+ #define VG_STRINGIT( X ) #X
+ #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
+#else
+ #define VG_CHECK_GL()
+#endif
+
+