CuTexImage.h
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00001 
00002 //      File:           CuTexImage.h
00003 //      Author:         Changchang Wu
00004 //      Description :   interface for the CuTexImage class.
00005 //                                      class for storing data in CUDA.
00006 //
00007 //      Copyright (c) 2007 University of North Carolina at Chapel Hill
00008 //      All Rights Reserved
00009 //
00010 //      Permission to use, copy, modify and distribute this software and its
00011 //      documentation for educational, research and non-profit purposes, without
00012 //      fee, and without a written agreement is hereby granted, provided that the
00013 //      above copyright notice and the following paragraph appear in all copies.
00014 //      
00015 //      The University of North Carolina at Chapel Hill make no representations
00016 //      about the suitability of this software for any purpose. It is provided
00017 //      'as is' without express or implied warranty. 
00018 //
00019 //      Please send BUG REPORTS to ccwu@cs.unc.edu
00020 //
00022 
00023 
00024 #ifndef CU_TEX_IMAGE_H
00025 #define CU_TEX_IMAGE_H
00026 
00027 class GLTexImage;
00028 struct cudaArray;
00029 struct textureReference;
00030 
00031 //using texture2D from linear memory
00032 
00033 #define SIFTGPU_ENABLE_LINEAR_TEX2D
00034 
00035 class CuTexImage
00036 {       
00037 protected:
00038         void*           _cuData;
00039         cudaArray*      _cuData2D;
00040         int                     _numChannel;
00041         int                     _numBytes;
00042         int                     _imgWidth;
00043         int                     _imgHeight;
00044         int                     _texWidth;
00045         int                     _texHeight;
00046         GLuint          _fromPBO;
00047 public:
00048         virtual void SetImageSize(int width, int height);
00049         virtual void InitTexture(int width, int height, int nchannel = 1);
00050         void InitTexture2D();
00051         inline void BindTexture(textureReference& texRef);
00052         inline void BindTexture2D(textureReference& texRef);
00053         void CopyToTexture2D();
00054         void CopyToHost(void* buf);
00055         void CopyToHost(void* buf, int stream);
00056         void CopyFromHost(const void* buf);
00057         int  CopyToPBO(GLuint pbo);
00058         void CopyFromPBO(int width, int height, GLuint pbo);
00059         static int DebugCopyToTexture2D();
00060 public:
00061         inline int GetImgWidth(){return _imgWidth;}
00062         inline int GetImgHeight(){return _imgHeight;}
00063         inline int GetDataSize(){return _numBytes;}
00064 public:
00065         CuTexImage();
00066         CuTexImage(int width, int height, int nchannel, GLuint pbo);
00067         virtual ~CuTexImage();
00068         friend class ProgramCU;
00069         friend class PyramidCU;
00070 };
00071 
00073 //transfer OpenGL Texture to PBO, then to CUDA vector
00074 //#endif 
00075 #endif // !defined(CU_TEX_IMAGE_H)
00076 
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