106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
//********************************************
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// Texture.h
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//********************************************
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// class CTexture
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//********************************************
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// This object stores a bitmap image used as
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// an OpenGL texture.
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// Files are stored as .bmp format.
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// Depth are currently 24 or 32 bits,
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// Modes are : RGB, RGBA (alpha layer).
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//********************************************
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// pierre.alliez@cnet.francetelecom.fr
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// Created : 17/12/97
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// Modified : 18/02/98
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//********************************************
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#ifndef _TEXTURE_
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#define _TEXTURE_
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class CTexture : public CObject
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{
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// Members datas
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protected :
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unsigned char *m_pData; // datas
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unsigned int m_Width; // width (pixels)
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unsigned int m_Height; // height (pixels)
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unsigned int m_Depth; // bits per pixel
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CString m_FileName; // texture image file name
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BITMAPINFOHEADER m_Header; // image header (display on device context)
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unsigned int m_WidthByte32; // width (in bytes, and 32 bits aligned)
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public :
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BOOL OpenGLScale(unsigned char cMaxSizeShift=10); //最大2的次方, 10==1024
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// Construction / destruction
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CTexture();
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virtual ~CTexture();
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// File reading
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int ReadFile(const TCHAR *filename,unsigned int width=-1,unsigned int height=-1,unsigned int depth=-1);
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int ReadFileBMP(const TCHAR *filename);
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int ReadFileJPG(const TCHAR *filename);
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int ReadFileGIF(const TCHAR *filename);
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int ReadFileTGA(const TCHAR *filename);
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int ReadFileRAW(const TCHAR *filename,unsigned int width,unsigned int height,unsigned int depth);
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// File saving
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int SaveFile(const TCHAR *filename);
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int SaveFileBMP(const TCHAR *filename);
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int SaveFileRAW(const TCHAR *filename);
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// Datas (explicit inline functions)
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unsigned char *GetData(void) { return m_pData; }
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unsigned int GetWidth(void) { return m_Width; }
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unsigned int GetHeight(void) { return m_Height;}
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unsigned int GetDepth(void) { return m_Depth; }
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CString GetFileName(void) { return m_FileName; }
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unsigned char *RepeatData(int uRep, int vRep);
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BOOL ScaleImage(unsigned int nNewWidth, unsigned int nNewHeight, unsigned char *pNewData);
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void MakeGrey();
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unsigned char *CloneData();
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// Misc
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int IsValid();
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int SameSize(CTexture *pTexture);
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int BGRtoRGB(void);
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int HigherPowerOfTwo(int value);
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int LowerPowerOfTwo(int value);
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// Updating
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void UpdateWidthByte32();
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void UpdateHeader();
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unsigned int WidthByte32(unsigned int width,unsigned int depth);
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// Alpha
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int HasAlpha() { return (m_Depth == 32); }
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int AddAlphaLayer(unsigned char alpha);
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int SetAlphaLayer(unsigned char alpha);
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int PutAlpha(CTexture *pTexture); // Put an alpha layer from grey scale
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// DuplicateMirror
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int DuplicateMirror(int left=0,int top=0,int right=-1,int bottom=-1);
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int DuplicateRepeatWidth(int left=0,int top=0,int right=-1,int bottom=-1);
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int Extract(int left=0,int top=0,int right=-1,int bottom=-1);
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// Display
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int Draw(CDC *pDC,int xOffset=0,int yOffset=0, int width=-1, int height=-1);
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// Buffer
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int ReadBuffer(unsigned char *buffer, int width, int height, int depth);
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int Grey(unsigned int x,unsigned int y);
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void Free(void);
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private :
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// Memory
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int Alloc(unsigned int width,unsigned int height,unsigned int depth);
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};
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#endif // _TEXTURE_
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