Hi，大家好，我是编程小6，很荣幸遇见你，我把这些年在开发过程中遇到的问题或想法写出来，今天说一说
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// IProcessB.h //#pragma once #ifndef _IPROCESSB_H #define _IPROCESSB_H #include <atlimage.h> struct IMAGEPARAMENT { int nWidth; int nHeight; int nBitCount; int nBytesPerLine; int nBytesPerPixel; int nNumColors; int nSize; }; void GetImageParament(CImage *pImg,struct IMAGEPARAMENT *ppImgParam); int InImage(CImage *pImg,int x,int y); // //DWORD GetPixelValue(CImage *pImg,int x,int y); //void SetPixelValue(CImage *pImg,int x,int y,DWORD c); //void GetRectValue(CImage *pImg,int x,int y,int Dx,int Dy,BYTE *buf); void SetRectValue(CImage *pImg,int x,int y,int Dx,int Dy,BYTE *buf); // //void GetPalette(CImage *pImg,int n,int *pr,int *pg,int *pb); //void SetPalette(CImage *pImg,int n,int r,int g,int b); void GetAllPalette(CImage *pImg,RGBQUAD *ColorTab); void SetAllPalette(CImage *pImg,RGBQUAD *ColorTab); // //void RectFillValue(CImage *pImg,int x,int y,int Dx,int Dy,DWORD color); //void DrawBox(CImage *pImg,int x,int y,int Dx,int Dy,int w,DWORD c); //void SetDefaultPalette(CImage *pImg); // int PaletteType(RGBQUAD *ColorTab); int ImageType(CImage *pImgm); //void ImageCopy(CImage *pImgn,CImage *pImgm); // //BYTE** Create2DList(CImage *pImgm); //void Release2DList(BYTE** list); // //COLORREF DwordToColorref(DWORD c); void RotateCimage(CImage *Imgm, CImage *Imgn, double alpha); #endif //!_IPROCESSB_H 

// IProcessB.cpp #include "stdafx.h" #include "IProcessB.h" #include <math.h> //RGBQUAD D_pal[256] = { // {0x00,0x00,0x00,0x00},{0xa8,0x00,0x00,0x00},{0x00,0xa8,0x00,0x00}, // {0xa8,0xa8,0x00,0x00},{0x00,0x00,0xa8,0x00},{0xa8,0x00,0xa8,0x00}, // {0x00,0x54,0xa8,0x00},{0xa8,0xa8,0xa8,0x00},{0x54,0x54,0x54,0x00}, // {0xfc,0x54,0x54,0x00},{0x54,0xfc,0x54,0x00},{0xfc,0xfc,0x54,0x00}, // {0x54,0x54,0xfc,0x00},{0xfc,0x54,0xfc,0x00},{0x54,0xfc,0xfc,0x00}, // {0xfc,0xfc,0xfc,0x00},{0x00,0x00,0x00,0x00},{0x14,0x14,0x14,0x00}, // {0x20,0x20,0x20,0x00},{0x2c,0x2c,0x2c,0x00},{0x38,0x38,0x38,0x00}, // {0x44,0x44,0x44,0x00},{0x50,0x50,0x50,0x00},{0x60,0x60,0x60,0x00}, // {0x70,0x70,0x70,0x00},{0x80,0x80,0x80,0x00},{0x90,0x90,0x90,0x00}, // {0xa0,0xa0,0xa0,0x00},{0xb4,0xb4,0xb4,0x00},{0xc8,0xc8,0xc8,0x00}, // {0xe0,0xe0,0xe0,0x00},{0xfc,0xfc,0xfc,0x00},{0xfc,0x00,0x00,0x00}, // {0xfc,0x00,0x40,0x00},{0xfc,0x00,0x7c,0x00},{0xfc,0x00,0xbc,0x00}, // {0xfc,0x00,0xfc,0x00},{0xbc,0x00,0xfc,0x00},{0x7c,0x00,0xfc,0x00}, // {0x40,0x00,0xfc,0x00},{0x00,0x00,0xfc,0x00},{0x00,0x40,0xfc,0x00}, // {0x00,0x7c,0xfc,0x00},{0x00,0xbc,0xfc,0x00},{0x00,0xfc,0xfc,0x00}, // {0x00,0xfc,0xbc,0x00},{0x00,0xfc,0x7c,0x00},{0x00,0xfc,0x40,0x00}, // {0x00,0xfc,0x00,0x00},{0x40,0xfc,0x00,0x00},{0x7c,0xfc,0x00,0x00}, // {0xbc,0xfc,0x00,0x00},{0xfc,0xfc,0x00,0x00},{0xfc,0xbc,0x00,0x00}, // {0xfc,0x7c,0x00,0x00},{0xfc,0x40,0x00,0x00},{0xfc,0x7c,0x7c,0x00}, // {0xfc,0x7c,0x9c,0x00},{0xfc,0x7c,0xbc,0x00},{0xfc,0x7c,0xdc,0x00}, // {0xfc,0x7c,0xfc,0x00},{0xdc,0x7c,0xfc,0x00},{0xbc,0x7c,0xfc,0x00}, // {0x9c,0x7c,0xfc,0x00},{0x7c,0x7c,0xfc,0x00},{0x7c,0x9c,0xfc,0x00}, // {0x7c,0xbc,0xfc,0x00},{0x7c,0xdc,0xfc,0x00},{0x7c,0xfc,0xfc,0x00}, // {0x7c,0xfc,0xdc,0x00},{0x7c,0xfc,0xbc,0x00},{0x7c,0xfc,0x9c,0x00}, // {0x7c,0xfc,0x7c,0x00},{0x9c,0xfc,0x7c,0x00},{0xbc,0xfc,0x7c,0x00}, // {0xdc,0xfc,0x7c,0x00},{0xfc,0xfc,0x7c,0x00},{0xfc,0xdc,0x7c,0x00}, // {0xfc,0xbc,0x7c,0x00},{0xfc,0x9c,0x7c,0x00},{0xfc,0xb4,0xb4,0x00}, // {0xfc,0xb4,0xc4,0x00},{0xfc,0xb4,0xd8,0x00},{0xfc,0xb4,0xe8,0x00}, // {0xfc,0xb4,0xfc,0x00},{0xe8,0xb4,0xfc,0x00},{0xd8,0xb4,0xfc,0x00}, // {0xc4,0xb4,0xfc,0x00},{0xb4,0xb4,0xfc,0x00},{0xb4,0xc4,0xfc,0x00}, // {0xb4,0xd8,0xfc,0x00},{0xb4,0xe8,0xfc,0x00},{0xb4,0xfc,0xfc,0x00}, // {0xb4,0xfc,0xe8,0x00},{0xb4,0xfc,0xd8,0x00},{0xb4,0xfc,0xc4,0x00}, // {0xb4,0xfc,0xb4,0x00},{0xc4,0xfc,0xb4,0x00},{0xd8,0xfc,0xb4,0x00}, // {0xe8,0xfc,0xb4,0x00},{0xfc,0xfc,0xb4,0x00},{0xfc,0xe8,0xb4,0x00}, // {0xfc,0xd8,0xb4,0x00},{0xfc,0xc4,0xb4,0x00},{0x70,0x00,0x00,0x00}, // {0x70,0x00,0x1c,0x00},{0x70,0x00,0x38,0x00},{0x70,0x00,0x54,0x00}, // {0x70,0x00,0x70,0x00},{0x54,0x00,0x70,0x00},{0x38,0x00,0x70,0x00}, // {0x1c,0x00,0x70,0x00},{0x00,0x00,0x70,0x00},{0x00,0x1c,0x70,0x00}, // {0x00,0x38,0x70,0x00},{0x00,0x54,0x70,0x00},{0x00,0x70,0x70,0x00}, // {0x00,0x70,0x54,0x00},{0x00,0x70,0x38,0x00},{0x00,0x70,0x1c,0x00}, // {0x00,0x70,0x00,0x00},{0x1c,0x70,0x00,0x00},{0x38,0x70,0x00,0x00}, // {0x54,0x70,0x00,0x00},{0x70,0x70,0x00,0x00},{0x70,0x54,0x00,0x00}, // {0x70,0x38,0x00,0x00},{0x70,0x1c,0x00,0x00},{0x70,0x38,0x38,0x00}, // {0x70,0x38,0x44,0x00},{0x70,0x38,0x54,0x00},{0x70,0x38,0x60,0x00}, // {0x70,0x38,0x70,0x00},{0x60,0x38,0x70,0x00},{0x54,0x38,0x70,0x00}, // {0x44,0x38,0x70,0x00},{0x38,0x38,0x70,0x00},{0x38,0x44,0x70,0x00}, // {0x38,0x54,0x70,0x00},{0x38,0x60,0x70,0x00},{0x38,0x70,0x70,0x00}, // {0x38,0x70,0x60,0x00},{0x38,0x70,0x54,0x00},{0x38,0x70,0x44,0x00}, // {0x38,0x70,0x38,0x00},{0x44,0x70,0x38,0x00},{0x54,0x70,0x38,0x00}, // {0x60,0x70,0x38,0x00},{0x70,0x70,0x38,0x00},{0x70,0x60,0x38,0x00}, // {0x70,0x54,0x38,0x00},{0x70,0x44,0x38,0x00},{0x70,0x50,0x50,0x00}, // {0x70,0x50,0x58,0x00},{0x70,0x50,0x60,0x00},{0x70,0x50,0x68,0x00}, // {0x70,0x50,0x70,0x00},{0x68,0x50,0x70,0x00},{0x60,0x50,0x70,0x00}, // {0x58,0x50,0x70,0x00},{0x50,0x50,0x70,0x00},{0x50,0x58,0x70,0x00}, // {0x50,0x60,0x70,0x00},{0x50,0x68,0x70,0x00},{0x50,0x70,0x70,0x00}, // {0x50,0x70,0x68,0x00},{0x50,0x70,0x60,0x00},{0x50,0x70,0x58,0x00}, // {0x50,0x70,0x50,0x00},{0x58,0x70,0x50,0x00},{0x60,0x70,0x50,0x00}, // {0x68,0x70,0x50,0x00},{0x70,0x70,0x50,0x00},{0x70,0x68,0x50,0x00}, // {0x70,0x60,0x50,0x00},{0x70,0x58,0x50,0x00},{0x40,0x00,0x00,0x00}, // {0x40,0x00,0x10,0x00},{0x40,0x00,0x20,0x00},{0x40,0x00,0x30,0x00}, // {0x40,0x00,0x40,0x00},{0x30,0x00,0x40,0x00},{0x20,0x00,0x40,0x00}, // {0x10,0x00,0x40,0x00},{0x00,0x00,0x40,0x00},{0x00,0x10,0x40,0x00}, // {0x00,0x20,0x40,0x00},{0x00,0x30,0x40,0x00},{0x00,0x40,0x40,0x00}, // {0x00,0x40,0x30,0x00},{0x00,0x40,0x20,0x00},{0x00,0x40,0x10,0x00}, // {0x00,0x40,0x00,0x00},{0x10,0x40,0x00,0x00},{0x20,0x40,0x00,0x00}, // {0x30,0x40,0x00,0x00},{0x40,0x40,0x00,0x00},{0x40,0x30,0x00,0x00}, // {0x40,0x20,0x00,0x00},{0x40,0x10,0x00,0x00},{0x40,0x20,0x20,0x00}, // {0x40,0x20,0x28,0x00},{0x40,0x20,0x30,0x00},{0x40,0x20,0x38,0x00}, // {0x40,0x20,0x40,0x00},{0x38,0x20,0x40,0x00},{0x30,0x20,0x40,0x00}, // {0x28,0x20,0x40,0x00},{0x20,0x20,0x40,0x00},{0x20,0x28,0x40,0x00}, // {0x20,0x30,0x40,0x00},{0x20,0x38,0x40,0x00},{0x20,0x40,0x40,0x00}, // {0x20,0x40,0x38,0x00},{0x20,0x40,0x30,0x00},{0x20,0x40,0x28,0x00}, // {0x20,0x40,0x20,0x00},{0x28,0x40,0x20,0x00},{0x30,0x40,0x20,0x00}, // {0x38,0x40,0x20,0x00},{0x40,0x40,0x20,0x00},{0x40,0x38,0x20,0x00}, // {0x40,0x30,0x20,0x00},{0x40,0x28,0x20,0x00},{0x40,0x2c,0x2c,0x00}, // {0x40,0x2c,0x30,0x00},{0x40,0x2c,0x34,0x00},{0x40,0x2c,0x3c,0x00}, // {0x40,0x2c,0x40,0x00},{0x3c,0x2c,0x40,0x00},{0x34,0x2c,0x40,0x00}, // {0x30,0x2c,0x40,0x00},{0x2c,0x2c,0x40,0x00},{0x2c,0x30,0x40,0x00}, // {0x2c,0x34,0x40,0x00},{0x2c,0x3c,0x40,0x00},{0x2c,0x40,0x40,0x00}, // {0x2c,0x40,0x3c,0x00},{0x2c,0x40,0x34,0x00},{0x2c,0x40,0x30,0x00}, // {0x2c,0x40,0x2c,0x00},{0x30,0x40,0x2c,0x00},{0x34,0x40,0x2c,0x00}, // {0x3c,0x40,0x2c,0x00},{0x40,0x40,0x2c,0x00},{0x40,0x3c,0x2c,0x00}, // {0x40,0x34,0x2c,0x00},{0x40,0x30,0x2c,0x00},{0x00,0x00,0x00,0x00}, // {0x00,0x00,0x00,0x00},{0x00,0x00,0x00,0x00},{0x00,0x00,0x00,0x00}, // {0x00,0x00,0x00,0x00},{0x00,0x00,0x00,0x00},{0x00,0x00,0x00,0x00}, // {0x00,0x00,0x00,0x00} //}; // void GetImageParament(CImage *pImg,struct IMAGEPARAMENT *ppImgParam) { if (pImg->IsNull()) return; ppImgParam->nWidth = pImg->GetWidth(); //图像宽度 ppImgParam->nHeight = pImg->GetHeight(); //图像高度 ppImgParam->nBitCount = pImg->GetBPP(); //每像素位数 ppImgParam->nBytesPerLine = (pImg->GetWidth()*pImg->GetBPP()+31)/32*4; //每行字节数 ppImgParam->nBytesPerPixel = pImg->GetBPP()/8; //每像素字节数 if (pImg->GetBPP()<=8) ppImgParam->nNumColors= 1 << pImg->GetBPP(); //调色板单元数 else ppImgParam->nNumColors= 0; ppImgParam->nSize = ppImgParam->nBytesPerLine*ppImgParam->nHeight; //像素总字节数 } int InImage(CImage *pImg,int x,int y) { struct IMAGEPARAMENT P; GetImageParament(pImg,&P); if ((x<0)||(y<0)||(x>=P.nWidth)||(y>=P.nHeight)) return 0; else return 1; } // //DWORD GetPixelValue(CImage *pImg,int x,int y) //{ // struct IMAGEPARAMENT P; // BYTE *lp; // DWORD dd=0; // // GetImageParament(pImg,&P); // if ((P.nBitCount<8)||(!InImage(pImg,x,y))) return 0; // lp = (BYTE*) pImg->GetPixelAddress(x,y); // memcpy(&dd,lp,P.nBytesPerPixel); // return(dd); //} // //void SetPixelValue(CImage *pImg,int x,int y,DWORD c) //{ // struct IMAGEPARAMENT P; // BYTE *lp; // // GetImageParament(pImg,&P); // if ((P.nBitCount<8)||(!InImage(pImg,x,y))) return; // lp = (BYTE*) pImg->GetPixelAddress(x,y); // memcpy(lp,&c,P.nBytesPerPixel); //} // //void GetRectValue(CImage *pImg,int x,int y,int Dx,int Dy,BYTE *buf) //{ // struct IMAGEPARAMENT P; // BYTE *lp; // int i,dw,dh,x1,y1,alpha,delta,Dxb,dwb; // // GetImageParament(pImg,&P); // if (P.nBitCount<8) return; // x1=x; // y1=y; // alpha=delta=0; // if (x<0) { // alpha=-x; x1=0; // } // if (y<0) { // delta=-y; y1=0; // } // if (!InImage(pImg,x1,y1)) return; // dw=min(Dx,(int) P.nWidth-x1); // dh=min(Dy,(int) P.nHeight-y1); // dw -= alpha; // dh -= delta; // // Dxb = Dx*P.nBytesPerPixel; // dwb = dw*P.nBytesPerPixel; // lp = (BYTE*) pImg->GetPixelAddress(x1,y1); // buf += (delta*Dx+alpha)*P.nBytesPerPixel; // for (i=0;i<dh;i++) { // memcpy(buf,lp,dwb); // buf += Dxb; // lp -= P.nBytesPerLine; // } //} // void SetRectValue(CImage *pImg,int x,int y,int Dx,int Dy,BYTE *buf) { struct IMAGEPARAMENT P; BYTE *lp; int i,dw,dh,x1,y1,alpha,delta,Dxb,dwb; GetImageParament(pImg,&P); if (P.nBitCount<8) return; x1=x; y1=y; alpha=delta=0; if (x<0) { alpha=-x; x1=0; } if (y<0) { delta=-y; y1=0; } if (!InImage(pImg,x1,y1)) return; dw=min(Dx,(int) P.nWidth-x1); dh=min(Dy,(int) P.nHeight-y1); dw -= alpha; dh -= delta; Dxb = Dx*P.nBytesPerPixel; dwb = dw*P.nBytesPerPixel; lp = (BYTE*) pImg->GetPixelAddress(x1,y1); buf += (delta*Dx+alpha)*P.nBytesPerPixel; for (i=0;i<dh;i++) { memcpy(lp,buf,dwb); buf += Dxb; lp -= P.nBytesPerLine; } } // //void GetPalette(CImage *pImg,int n,int *pr,int *pg,int *pb) //{ // RGBQUAD ColorTab; // // pImg->GetColorTable(n, 1, &ColorTab); // *pb = ColorTab.rgbBlue; // *pg = ColorTab.rgbGreen; // *pr = ColorTab.rgbRed; //} // //void SetPalette(CImage *pImg,int n,int r,int g,int b) //{ // RGBQUAD ColorTab; // // ColorTab.rgbBlue = b; // ColorTab.rgbGreen = g; // ColorTab.rgbRed = r; // pImg->SetColorTable(n, 1, &ColorTab); //} // void GetAllPalette(CImage *pImg,RGBQUAD *ColorTab) { struct IMAGEPARAMENT P; GetImageParament(pImg,&P); pImg->GetColorTable(0, P.nNumColors, ColorTab); } void SetAllPalette(CImage *pImg, RGBQUAD *ColorTab) { struct IMAGEPARAMENT P; GetImageParament(pImg,&P); pImg->SetColorTable(0, P.nNumColors, ColorTab); } // //void RectFillValue(CImage *pImg,int x,int y,int Dx,int Dy,DWORD color) //{ // struct IMAGEPARAMENT P; // BYTE *buf,*buf0; // int i,j,dw,dh,x1,y1,alpha,delta,dwb; // // GetImageParament(pImg,&P); // if (P.nBitCount<8) return; // x1=x; // y1=y; // alpha=delta=0; // if (x<0) { // alpha=-x; x1=0; // } // if (y<0) { // delta=-y; y1=0; // } // if (!InImage(pImg,x1,y1)) return; // dw=min(Dx,(int) P.nWidth-x1); // dh=min(Dy,(int) P.nHeight-y1); // dw -= alpha; // dh -= delta; // dwb = dw*P.nBytesPerPixel; // // if (dw==1) // { // for (i=0;i<dh;i++) // { // buf = (BYTE*) pImg->GetPixelAddress(x1,y1+i); // memcpy(buf,&color,P.nBytesPerPixel); // } // } // else { // buf0= (BYTE*) pImg->GetPixelAddress(x1,y1); // buf = buf0; // for (j=0;j<dw;j++) // { // memcpy(buf,&color,P.nBytesPerPixel); // buf += P.nBytesPerPixel; // } // for (i=1;i<dh;i++) // { // buf = (BYTE*) pImg->GetPixelAddress(x1,y1+i); // memcpy(buf,buf0,dwb); // } // } //} // //void DrawBox(CImage *pImg,int x,int y,int Dx,int Dy,int w,DWORD c) //{ // if (pImg->GetBPP()<=8) c = c &0xff; // RectFillValue(pImg,x,y,Dx,w,c); // RectFillValue(pImg,x,y+Dy-w,Dx,w,c); // RectFillValue(pImg,x,y,w,Dy-w,c); // RectFillValue(pImg,x+Dx-w,y,w,Dy,c); //} // //void SetDefaultPalette(CImage *pImg) //{ // if (pImg->GetBPP()>8) return; // pImg->SetColorTable(0, 256, D_pal); //} // int PaletteType(RGBQUAD *ColorTab) { int i,k,m,n,r,g,b; m=n=0; for (i=0; i<256; i++) { r = ColorTab[i].rgbRed; g = ColorTab[i].rgbGreen; b = ColorTab[i].rgbBlue; if ((r != g)||(r != b)) m=0; if ((i>0)&&(r>ColorTab[i-1].rgbRed)) m++; if (r+g+b==0) n++; } k=3; if (m == 255) k=2; else if (256-n==1) k=0; else if (256-n==15) k=1; return(k); } int ImageType(CImage *pImgm) //判断图像类型 { RGBQUAD ColorTab[256]; int k; if (pImgm->IsNull()) return(0); switch(pImgm->GetBPP()) { case 1: k=0; break; case 4: k=1; break; case 8: k=3; break; default: k=4; break; } if (k==3) { pImgm->GetColorTable(0,256,ColorTab); k=PaletteType(ColorTab); } return(k); } // //void ImageCopy(CImage *pImgn,CImage *pImgm) //位图的复制 //{ // struct IMAGEPARAMENT P; // RGBQUAD ColorTab[256]; // CDC *pOrigDC,*pDC; // // GetImageParament(pImgm,&P); //获取原始位图参数 // // if (!pImgn->IsNull()) //目标位图非空 // pImgn->Destroy(); //删除目标位图 // pImgn->Create(P.nWidth,P.nHeight,P.nBitCount,0); // // if (P.nNumColors>0) //原始位图有调色板 // { // pImgm->GetColorTable(0,P.nNumColors,ColorTab); // pImgn->SetColorTable(0,P.nNumColors,ColorTab); //复制调色板数据 // } // pOrigDC= CDC::FromHandle(pImgm->GetDC()); //建立原位图CDC // pDC = CDC::FromHandle(pImgn->GetDC()); //建立目标位图CDC // pDC->BitBlt(0,0,P.nWidth,P.nHeight,pOrigDC,0,0,SRCCOPY);//复制像素数据 // pImgm->ReleaseDC(); //释放CDC指针 // pImgn->ReleaseDC(); //} // //BYTE** Create2DList(CImage *pImg) //创建位图二维数组 //{ // struct IMAGEPARAMENT P; // int i; // BYTE **list; // // GetImageParament(pImg,&P); // list=(BYTE**)malloc(P.nHeight*sizeof(BYTE*)); // for (i=0;i<P.nHeight;i++) // list[i]=(BYTE*) pImg->GetPixelAddress(0,i); // // return(list); //} // //void Release2DList(BYTE** list) //释放位图二维数组 //{ // free(list); //} // //COLORREF DwordToColorref(DWORD c) //{ // union COLOR { // COLORREF clrref; // BYTE c[4]; // } col; // BYTE i; // // col.clrref=c; // i=col.c[0]; col.c[0]=col.c[2]; // col.c[2]=i; // return(col.clrref); //} /*图像旋转函数 Imgn/Imgm 目标图像/源图像指针 alpha 旋转角度,顺时针方向为正*/ void RotateCimage(CImage *Imgm, CImage *Imgn, double alpha) { IMAGEPARAMENT P; RGBQUAD ColorTab[256]; int i, j, ww, Xd, Yd, Dx, Dy,nSize; double centerx, centery, sintheta, costheta; double X1, Y1, X2, Y2, theta, xx, yy, rr; BYTE **list, *sc; int x1, y1, x2, y2, flag; double p, q, a, b, c, d, t1, t2, t3; if (ImageType(Imgm) == 2) flag = 1; //flag为标志位，当取值为1时，表示双线性内插法 ,此时图像类型为灰阶图像 else flag = 0; //0表示最近邻点法 GetImageParament(Imgm, &P); Dx = P.nWidth; Dy = P.nHeight; nSize = 0; if (Dx < Dy) { nSize = Dy; } else { nSize = Dx; } int nLineBytes = (nSize * P.nBitCount + 31) / 32 * 4; //还有一点要修改，不然当图像高度远大于宽度时会崩溃 sc = (BYTE*) malloc(2 * nLineBytes); // * P.nBytesPerLine); //申请工作单元 // list = (BYTE**) malloc(Dy * sizeof(BYTE*)); //对原位图建立二维数组 for (i = 0; i < Dy; i++) list[i] = (BYTE*) Imgm ->GetPixelAddress(0, i); centerx = Dx / 2; //计算位图中心位置 centery = Dy / 2; rr = sqrt(centerx * centerx + centery *centery); //计算对角线长度 theta = atan((double) centery / (double) centerx); X1 = fabs(rr * cos(alpha + theta)) + 0.5; Y1 = fabs(rr * sin(alpha + theta)) + 0.5; X2 = fabs(rr * cos(alpha - theta)) + 0.5; Y2 = fabs(rr * sin(alpha - theta)) + 0.5; if (X2 > X1) X1 = X2; //得外接矩形宽度 if (Y2 > Y1) Y1 = Y2; //外接矩形高度 ww = (int) (2 * X1); Imgn ->Destroy(); Imgn ->Create(ww, (int) (2 * Y1), P.nBitCount ); //建立结果位图 if (P.nBitCount == 8) { GetAllPalette(Imgm, ColorTab); //修改一，设置目标调色板 SetAllPalette(Imgn, ColorTab); //复制调色板 } sintheta = sin(alpha); costheta = cos(alpha); for (j = (int) (centery - Y1), Yd = 0; j <= (centery + Y1); j++, Yd++) { if (P.nBitCount == 8) memset (sc, 0, ww); //256色位图像素行置背景值 else memset(sc, 0, ww * P.nBytesPerPixel); //真彩色位图像素行置背景值 for (i = (int) (centerx - X1), Xd = 0; i <= centerx + X1; i++, Xd += P.nBytesPerPixel) { xx = centerx + costheta * (i - centerx) + sintheta * (j - centery); yy = centery - sintheta * (i - centerx) + costheta * (j - centery); x1 = (int) xx; x2 = x1 + 1; p = xx - x1; y1 = (int) yy; y2 = y1 + 1; q = yy - y1; if (((x1 < 0)||(x2 >= P.nWidth )||(y1 < 0)||(y2 >= P.nHeight ))) continue; if (flag == 0) { if (q > 0.5) y1 = y2; if (p > 0.5) x1 = x2; //修改二, sc[Xd] memcpy(&sc[Xd], &list[y1][x1 * P.nBytesPerPixel], P.nBytesPerPixel); //从源位图复制像素数据 } else { // flag等于1，双线性内插法 a = (double) list[y1][x1]; //从源位图取数据 b = (double) list[y1][x2]; c = (double) list[y2][x1]; d = (double) list[y2][x2]; t1 = (1 - p) * a + p * b; //双线性内插计算 t2 = (1 - p) * c + p * d; t3 = (1 - q) * t1 + q * t2; //修改三 sc[Xd] = (BYTE) t3; } } SetRectValue(Imgn, 0, Yd, ww, 1, sc); } free(list); //释放工作单元 free(sc); } 

调用处：

CImage* pImage2 = new CImage;

RotateCimage(pImage, pImage2, 1.);//顺时针90度

注：在旋转之前应该学会使用CImage绘制简单图形

参考：

http://bbs.csdn.net/topics/

http://download.csdn.net/download/dkbrain/

http://www.pudn.com/downloads113/sourcecode/graph/texture_mapping/detail475636.html

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