The GtkRadiant sources as originally released under the GPL license.

contrib/bkgrnd2d/bkgrnd2d.h

@@ -0,0 +1,82 @@
+/*
+Copyright (C) 2003 Reed Mideke.
+
+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
+*/
+
+//
+// bkgrnd2d Plugin
+//
+// Code by reyalP aka Reed Mideke
+//
+// Based on spritemodel source code by hydra
+//
+
+#include "plugin.h"
+
+class CBackgroundImage {
+private:
+	qtexture_t *m_tex;
+  VIEWTYPE m_vt;
+  
+// which components of a vec3_t correspond to x and y in the image
+  unsigned m_ix,m_iy;
+
+public:
+	CBackgroundImage(VIEWTYPE vt);
+//  ~CBackgroundImage();
+
+	float m_alpha; // vertex alpha
+	bool m_bActive;
+	
+// x and y axis are in relation to the screen, not world, making rendering
+// the same for each view type. Whoever sets them is responsible for 
+// shuffling.
+// units are world units.
+// TODO should be private
+	float m_xmin,m_ymin,m_xmax,m_ymax;
+
+// load file, create new tex, cleanup old tex, set new tex
+	bool Load(const char *filename); 
+	void Cleanup(); // free texture, free tex, set make tex NULL
+	bool SetExtentsMM(); // set extents by ET mapcoordsmaxs/mapcoordsmins
+	bool SetExtentsSel(); // set extents by selection
+	void Render();
+	bool Valid() { return (m_tex && (m_xmin != m_xmax) && (m_ymin != m_ymax)); }
+};
+
+class CBackgroundRender : public IGL2DWindow {
+public:
+
+  CBackgroundRender();
+  virtual ~CBackgroundRender();
+
+protected:
+	int refCount;
+
+public:
+
+  // IGL2DWindow IGL3DWindow interface
+	void IncRef() { refCount++; }
+	void DecRef() { refCount--; if (refCount <= 0) delete this; }
+	void Draw2D( VIEWTYPE vt );
+	void Register();
+};
+
+extern CBackgroundImage backgroundXY,backgroundXZ,backgroundYZ;
+extern CBackgroundRender render;
+