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ApplePBTextureTarget.h
1 /***********************************************************************
2  filename: CEGUIOpenGLApplePBTextureTarget.h
3  created: Sun Feb 1 2009
4  author: Paul D Turner
5 *************************************************************************/
6 /***************************************************************************
7  * Copyright (C) 2004 - 2011 Paul D Turner & The CEGUI Development Team
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining
10  * a copy of this software and associated documentation files (the
11  * "Software"), to deal in the Software without restriction, including
12  * without limitation the rights to use, copy, modify, merge, publish,
13  * distribute, sublicense, and/or sell copies of the Software, and to
14  * permit persons to whom the Software is furnished to do so, subject to
15  * the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be
18  * included in all copies or substantial portions of the Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26  * OTHER DEALINGS IN THE SOFTWARE.
27  ***************************************************************************/
28 #ifndef _CEGUIOpenGLApplePBTextureTarget_h_
29 #define _CEGUIOpenGLApplePBTextureTarget_h_
30 
31 #include <OpenGL/OpenGL.h>
32 #include "CEGUI/RendererModules/OpenGL/TextureTarget.h"
33 
34 // Start of CEGUI namespace section
35 namespace CEGUI
36 {
37 class OpenGLTexture;
38 
45 {
46 public:
48  virtual ~OpenGLApplePBTextureTarget();
49 
50  // overrides from OpenGLRenderTarget
51  void activate();
52  void deactivate();
53  // implementation of TextureTarget interface
54  void clear();
55  void declareRenderSize(const Sizef& sz);
56  // specialise functions from OpenGLTextureTarget
57  void grabTexture();
58  void restoreTexture();
59 
60 protected:
62  static const float DEFAULT_SIZE;
63 
65  void initialiseTexture();
66 
68  void enablePBuffer() const;
69 
71  void disablePBuffer() const;
72 
74  CGLPBufferObj d_pbuffer;
76  CGLContextObj d_context;
78  GLint d_screen;
80  mutable CGLContextObj d_prevContext;
81 };
82 
83 } // End of CEGUI namespace section
84 
85 #endif // end of guard _CEGUIOpenGLApplePBTextureTarget_h_