add GLUT_window ex

GLUT_window/aux.h

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the opengl project.
+ * Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#ifndef AUX_H__
+#define AUX_H__
+
+typedef enum{
+    VERB_NONE,
+    VERB_MESG,
+    VERB_DEBUG
+} verblevel;
+
+int verbose(verblevel levl, const char *fmt, ...);
+char *check_filename(char *outfile, char *suff);
+
+#define VMESG(...)  do{verbose(VERB_MESG, __VA_ARGS__);}while(0)
+#define VDBG(...)   do{verbose(VERB_DEBUG, __VA_ARGS__);}while(0)
+
+#endif // AUX_H__