The GtkRadiant sources as originally released under the GPL license.

radiant/patchdialog.h

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+/*
+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
+*/
+
+#if !defined(INCLUDED_PATCHDIALOG_H)
+#define INCLUDED_PATCHDIALOG_H
+
+void PatchInspector_Construct();
+void PatchInspector_Destroy();
+
+typedef struct _GtkWidget GtkWidget;
+typedef struct _GtkWindow GtkWindow;
+void PatchInspector_constructWindow(GtkWindow* main_window);
+void PatchInspector_destroyWindow();
+
+namespace scene
+{
+  class Graph;
+}
+
+void Scene_PatchTranslateTexture_Selected(scene::Graph& graph, float s, float t);
+void Scene_PatchRotateTexture_Selected(scene::Graph& graph, float angle);
+void Scene_PatchScaleTexture_Selected(scene::Graph& graph, float s, float t);
+
+
+#endif