Add macro for checking OpenGL function is it null or not null.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/render/mglcheck.h b/src/render/mglcheck.h
new file mode 100644
index 000000000..8355d8ab9
--- /dev/null
+++ b/src/render/mglcheck.h
@@ -0,0 +1,31 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2012-2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  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 2 of the License, or
+ *  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/>.
+ */
+
+#ifndef RENDER_MGLCHECK_H
+#define RENDER_MGLCHECK_H
+
+#include "main.h"
+#ifdef USE_OPENGL
+
+#define isGLNull(func) (!(func))
+#define isGLNotNull(func) ((func) != nullptr)
+
+#endif  // USE_OPENGL
+#endif  // RENDER_MGLCHECK_H