NULL == fFunctions.fUniformMatrix3fv ||
NULL == fFunctions.fUniformMatrix4fv ||
NULL == fFunctions.fUseProgram ||
+#if 0
+ NULL == fFunctions.fVertexAttrib1f ||
+ NULL == fFunctions.fVertexAttrib2fv ||
+ NULL == fFunctions.fVertexAttrib3fv ||
+#endif
NULL == fFunctions.fVertexAttrib4fv ||
NULL == fFunctions.fVertexAttribPointer ||
NULL == fFunctions.fViewport ||