The GtkRadiant sources as originally released under the GPL license.

tools/quake2/common/lbmlib.h

@@ -0,0 +1,38 @@
+/*
+Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+For a list of contributors, see the accompanying CONTRIBUTORS file.
+
+This file is part of GtkRadiant.
+
+GtkRadiant 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
+(at your option) any later version.
+
+GtkRadiant 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 GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+// piclib.h
+
+
+void LoadLBM (char *filename, byte **picture, byte **palette);
+void WriteLBMfile (char *filename, byte *data, int width, int height
+	, byte *palette);
+void LoadPCX (char *filename, byte **picture, byte **palette, int *width, int *height);
+void WritePCXfile (char *filename, byte *data, int width, int height
+	, byte *palette);
+
+// loads / saves either lbm or pcx, depending on extension
+void Load256Image (char *name, byte **pixels, byte **palette,
+				   int *width, int *height);
+void Save256Image (char *name, byte *pixels, byte *palette,
+				   int width, int height);
+
+
+void LoadTGA (char *filename, byte **pixels, int *width, int *height);