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nux  3.0.0
IOpenGLVolume.h
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00001 /*
00002  * Copyright 2010 Inalogic® Inc.
00003  *
00004  * This program is free software: you can redistribute it and/or modify it
00005  * under the terms of the GNU Lesser General Public License, as
00006  * published by the  Free Software Foundation; either version 2.1 or 3.0
00007  * of the License.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranties of
00011  * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
00012  * PURPOSE.  See the applicable version of the GNU Lesser General Public
00013  * License for more details.
00014  *
00015  * You should have received a copy of both the GNU Lesser General Public
00016  * License along with this program. If not, see <http://www.gnu.org/licenses/>
00017  *
00018  * Authored by: Jay Taoko <jaytaoko@inalogic.com>
00019  *
00020  */
00021 
00022 
00023 #ifndef IOPENGLVOLUME_H
00024 #define IOPENGLVOLUME_H
00025 
00026 namespace nux
00027 {
00028 
00029   class IOpenGLResource;
00030   class IOpenGLVolumeTexture;
00031 
00032   class IOpenGLVolume: public IOpenGLResource
00033   {
00034     NUX_DECLARE_OBJECT_TYPE(IOpenGLVolume, IOpenGLResource);
00035 
00036   public:
00037     virtual int RefCount() const;
00038 
00039     int LockBox(
00040       VOLUME_LOCKED_BOX *pLockedVolume,
00041       const VOLUME_BOX *pBox);
00042 
00043     int UnlockBox();
00044 
00045     BitmapFormat GetPixelFormat() const;
00046     int GetWidth() const;
00047     int GetHeight() const;
00048     int GetDepth() const;
00049 
00050     int GetMipLevel() const
00051     {
00052       return _SMipLevel;
00053     }
00054 
00055     int GetSurfaceTarget() const
00056     {
00057       return _SSurfaceTarget;
00058     }
00059 
00060     int GetLevelDesc(VOLUME_DESC *pDesc)
00061     {
00062       pDesc->Width    = GetWidth();
00063       pDesc->Height   = GetHeight();
00064       pDesc->Depth    = GetDepth();
00065       pDesc->PixelFormat   = GetPixelFormat();
00066       pDesc->Type     = _ResourceType;
00067       return OGL_OK;
00068     }
00069 
00070   private:
00071     virtual ~IOpenGLVolume();
00072 
00073     int InitializeLevel();
00074 
00075     IOpenGLVolume(IOpenGLVolumeTexture *VolumeTexture, GLenum OpenGLID, GLenum TextureTarget, GLenum SurfaceTarget, unsigned int MipLevel)
00076       : IOpenGLResource(RTVOLUME)
00077       , _STextureTarget(TextureTarget)
00078       , _SSurfaceTarget(SurfaceTarget)
00079       , _SMipLevel(MipLevel)
00080       , _VolumeTexture(VolumeTexture)
00081       , _AllocatedUnpackBuffer(0xFFFFFFFF)
00082     {
00083       // IOpenGLVolume surfaces are created inside a IOpenGLVolumeTexture.
00084       // They reside within this class. The reference counting starts once a call to GetVolumeLevel is made to the container object.
00085       _RefCount = 0;
00086       _OpenGLID = OpenGLID;
00087       _LockedBox.pBits = 0;
00088       _LockedBox.RowPitch = 0;
00089       _CompressedDataSize = 0;
00090       _Initialized = 0;
00091     }
00092 
00093     // _STextureTarget may be
00094     //      GL_TEXTURE_3D
00095     GLenum      _STextureTarget;
00096 
00097     // _SSurfaceTarget may be
00098     //      GL_TEXTURE_3D
00099     GLenum      _SSurfaceTarget;
00100     int         _SMipLevel;
00101 
00102     VOLUME_LOCKED_BOX _LockedBox;
00103     VOLUME_BOX        _Box;
00104     int               _CompressedDataSize;
00105 
00106     IOpenGLVolumeTexture *_VolumeTexture;
00107     bool           _Initialized;
00108 
00109     int            _AllocatedUnpackBuffer;
00110 
00111     friend class IOpenGLVolumeTexture;
00112     friend class ObjectPtr<IOpenGLVolume>;
00113   };
00114 
00115 }
00116 
00117 #endif // IOPENGLVOLUME_H