#include "StdAfx.h" #include "ImageEx.h" #include ////////////////////////////////////////////////////////////////////////////////// //构造函数 CImageEx::CImageEx() { ::SetRect(&m_rcNinePart,0,0,0,0); m_cbAlpha = 255; return; } //析构函数 CImageEx::~CImageEx() { //销毁图片 DestroyImage(); return; } //销毁图片 bool CImageEx::DestroyImage() { Destroy(); return true; } //加载图片 bool CImageEx::LoadImage(LPCTSTR pszFileName) { HRESULT hr = CImage::Load(pszFileName); if (hr == S_OK) { return SetAlphaBit(); } else { return FALSE; } } //加载图片 bool CImageEx::LoadImage(HINSTANCE hInstance, LPCTSTR pszResourceName,LPCTSTR pszResourceType/*=TEXT("IMAGE")*/) { //查找资源 HRSRC hResource=FindResource(hInstance,pszResourceName,pszResourceType); if (hResource==NULL) return false; //读取资源 DWORD dwImageSize=SizeofResource(hInstance,hResource); LPVOID pImageBuffer=LoadResource(hInstance,hResource); //创建数据 IStream * pIStream=NULL; if (CreateStreamOnHGlobal(NULL,TRUE,&pIStream)!=S_OK) { ASSERT(FALSE); return false; } //写入数据 pIStream->Write(pImageBuffer,dwImageSize,NULL); HRESULT hr = CImage::Load(pIStream); //释放资源 SafeRelease(pIStream); if (hr == S_OK) { return SetAlphaBit(); } else { return FALSE; } } //绘画图像 BOOL CImageEx::DrawImage(CDC * pDC, INT nXPos, INT nYPos) { pDC->SetStretchBltMode(HALFTONE); if ( m_ImageClone.IsNull() ) return CImage::Draw(pDC->GetSafeHdc(),nXPos,nYPos,GetWidth(),GetHeight()); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),nXPos,nYPos,GetWidth(),GetHeight(),0,0,GetWidth(),GetHeight(),m_cbAlpha); else m_ImageClone.Draw(pDC->GetSafeHdc(),nXPos,nYPos,GetWidth(),GetHeight()); } return CImage::Draw(pDC->GetSafeHdc(),nXPos,nYPos); } //绘画图像 BOOL CImageEx::DrawImage( CDC * pDC, INT nXPos, INT nYPos, INT nDestWidth, INT nDestHeight ) { pDC->SetStretchBltMode(HALFTONE); if( nDestWidth == 0 || nDestHeight == 0 ) return FALSE; if ( m_ImageClone.IsNull() ) return CImage::Draw(pDC->GetSafeHdc(),nXPos,nYPos,nDestWidth,nDestHeight); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),nXPos,nYPos,nDestWidth,nDestHeight,0,0,GetWidth(),GetHeight(),m_cbAlpha); else m_ImageClone.Draw(pDC->GetSafeHdc(),nXPos,nYPos,nDestWidth,nDestHeight); } return FALSE; } //绘画图像 BOOL CImageEx::DrawImage( CDC * pDC, RECT &rc ) { pDC->SetStretchBltMode(HALFTONE); if( rc.right-rc.left == 0 || rc.bottom-rc.top == 0 ) return FALSE; if ( m_ImageClone.IsNull() ) return CImage::Draw(pDC->GetSafeHdc(),rc); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),rc,CRect(0,0,m_ImageClone.GetWidth(),m_ImageClone.GetHeight()),m_cbAlpha); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),rc.left,rc.top,(rc.right-rc.left),(rc.bottom-rc.top),0,0,GetWidth(),GetHeight(),m_cbAlpha); else m_ImageClone.Draw(pDC->GetSafeHdc(),rc); } } return FALSE; } //绘画图像 BOOL CImageEx::DrawImage(CDC * pDC, INT nXDest, INT nYDest, INT nDestWidth, INT nDestHeight, INT nXScr, INT nYSrc) { pDC->SetStretchBltMode(HALFTONE); if( nDestWidth == 0 || nDestHeight == 0 ) return FALSE; if ( m_ImageClone.IsNull() ) return CImage::Draw(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,GetWidth(),GetHeight()); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,GetWidth(),GetHeight(),m_cbAlpha); else m_ImageClone.Draw(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,GetWidth(),GetHeight()); } return FALSE; } //绘画图像 BOOL CImageEx::DrawImage(CDC * pDC, INT nXDest, INT nYDest, INT nDestWidth, INT nDestHeight, INT nXScr, INT nYSrc, INT nSrcWidth, INT nSrcHeight) { pDC->SetStretchBltMode(HALFTONE); if( nSrcWidth == 0 || nSrcHeight == 0 ) return FALSE; if ( m_ImageClone.IsNull() ) return CImage::Draw(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,nSrcWidth,nSrcHeight); else { if ( m_cbAlpha != 255 ) m_ImageClone.AlphaBlend(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,nDestWidth,nDestHeight,m_cbAlpha); else m_ImageClone.Draw(pDC->GetSafeHdc(),nXDest,nYDest,nDestWidth,nDestHeight,nXScr,nYSrc,nSrcWidth,nSrcHeight); } return FALSE; } bool CImageEx::Draw( CDC * pDC, INT x, INT y, INT cx, INT cy,INT nLeft,INT nTop,INT nRight,INT nBottom ) { int cxImage = GetWidth(); int cyImage = GetHeight(); // 左上 { RECT rcDest = {x, y, x+nLeft, y+nTop}; RECT rcSrc = {0, 0, nLeft, nTop}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 左边 { RECT rcDest = {x, y+nTop, x+nLeft, (y+nTop)+(cy-nTop-nBottom)}; RECT rcSrc = {0, nTop, nLeft, nTop+(cyImage-nTop-nBottom)}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 上边 { RECT rcDest = {x+nLeft, y,x+(cx-nRight), y+nTop}; RECT rcSrc = {nLeft, 0, (cxImage-nLeft-nRight), nTop}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 右上 { RECT rcDest = {x+(cx-nRight), y, (x+(cx-nRight))+nRight, y+nTop}; RECT rcSrc = {cxImage-nRight, 0, (cxImage-nRight)+nRight, nTop}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 右边 { RECT rcDest = {x+(cx-nRight), y+nTop, (x+(cx-nRight))+nRight, (y+nTop)+(cy-nTop-nBottom)}; RECT rcSrc = {cxImage-nRight, nTop, (cxImage-nRight)+nRight, nTop+(cyImage-nTop-nBottom)}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 下边 { RECT rcDest = {x+nLeft, y+(cy-nBottom), (x+nLeft)+(cx-nLeft-nRight), (y+(cy-nBottom))+nBottom}; RECT rcSrc = {nLeft, cyImage-nBottom, nLeft+(cxImage-nLeft-nRight), (cyImage-nBottom)+nBottom}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 右下 { RECT rcDest = {x+(cx-nRight), y+(cy-nBottom), (x+(cx-nRight))+nRight, (y+(cy-nBottom))+nBottom}; RECT rcSrc = {cxImage-nRight, cyImage-nBottom, (cxImage-nRight)+nRight, (cyImage-nBottom)+nBottom}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 左下 { RECT rcDest = {x, y+(cy-nBottom), x+nLeft, (y+(cy-nBottom))+nBottom}; RECT rcSrc = {0, cyImage-nBottom, nLeft, (cyImage-nBottom)+nBottom}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 中间 { RECT rcDest = {x+nLeft, y+nTop, x+(cx-nRight), y+(cy-nBottom)}; RECT rcSrc = {nLeft, nTop, cxImage-nRight, cyImage-nBottom}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } return true; } bool CImageEx::Draw( CDC * pDC, const RECT& rectDest, const RECT& rectSrc ) { return Draw(pDC,rectDest.left, rectDest.top, rectDest.right-rectDest.left, rectDest.bottom-rectDest.top, rectSrc.left, rectSrc.top,rectSrc.right, rectSrc.bottom); } bool CImageEx::Draw( CDC * pDC, const RECT& rectDest ) { return Draw(pDC,rectDest,m_rcNinePart); } bool CImageEx::DrawFrame( CDC * pDC, const RECT& rectDest ) { INT x = rectDest.left; INT y = rectDest.top; INT cx = rectDest.right-rectDest.left; INT cy = rectDest.bottom - rectDest.top; INT nLeft = m_rcNinePart.left; INT nTop = m_rcNinePart.top; INT nRight = m_rcNinePart.right; INT nBottom = m_rcNinePart.bottom; // 左边 { RECT rcDest = {x, y, x+nLeft, (y+nTop)+(cy)}; RECT rcSrc = {0, nTop, nLeft, nTop+(GetHeight()-nTop-nBottom)}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 上边 { RECT rcDest = {x, y,x+(cx), y+nTop}; RECT rcSrc = {nLeft, 0, (GetWidth()-nLeft-nRight), nTop}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 右边 { RECT rcDest = {x+(cx-nRight), y+nTop, (x+(cx-nRight))+nRight, (y+nTop)+(cy-nTop-nBottom)}; RECT rcSrc = {GetWidth()-nRight, nTop, (GetWidth()-nRight)+nRight, nTop+(GetHeight()-nTop-nBottom)}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // 下边 { RECT rcDest = {x, y+(cy-nBottom), (x)+(cx), (y+(cy-nBottom))+nBottom}; RECT rcSrc = {nLeft, GetHeight()-nBottom, nLeft+(GetWidth()-nLeft-nRight), (GetHeight()-nBottom)+nBottom}; if (!::IsRectEmpty(&rcDest) && !::IsRectEmpty(&rcSrc)) DrawImage(pDC,rcDest.left, rcDest.top, rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, rcSrc.left, rcSrc.top,rcSrc.right-rcSrc.left, rcSrc.bottom-rcSrc.top); } // DrawImage(pDC,rectDest.left,rectDest.top,nWidth,m_rcNinePart.top,0,0,GetWidth(),m_rcNinePart.top); // DrawImage(pDC,rectDest.right-m_rcNinePart.right,rectDest.top-m_rcNinePart.top,m_rcNinePart.right,nHeight,GetWidth()-m_rcNinePart.right,0,m_rcNinePart.right,GetHeight()); // DrawImage(pDC,rectDest.left,rectDest.bottom-m_rcNinePart.bottom,nWidth,m_rcNinePart.bottom,0,GetHeight()-m_rcNinePart.bottom,GetWidth(),m_rcNinePart.bottom); // DrawImage(pDC,rectDest.left,rectDest.top-m_rcNinePart.top,m_rcNinePart.left,nHeight,0,0,m_rcNinePart.left,GetHeight()); return true; } void CImageEx::SetNinePart( CONST LPRECT lprcNinePart ) { if( lprcNinePart == NULL ) return; ::CopyRect(&m_rcNinePart,lprcNinePart); } HBITMAP CImageEx::ImageToBitmap() { return (HBITMAP)*this; } bool CImageEx::DrawExtrude( CDC*pDC,const RECT& rectDest,bool bLeft,int nPixel ) { //创建屏幕 ASSERT(pDC!=NULL); int nWidth = rectDest.right - rectDest.left; int nHeight = rectDest.bottom - rectDest.top; if ( bLeft ) { DrawImage(pDC,rectDest.left,rectDest.top); if(nWidth>GetWidth()) DrawImage(pDC,GetWidth(),rectDest.top,(nWidth-GetWidth()),GetHeight(),GetWidth()-nPixel,0,nPixel,GetHeight()); } else { if ( nWidth <=GetWidth() ) { DrawImage(pDC,rectDest.left,rectDest.top,nWidth,GetHeight(),GetWidth()-nWidth,0,nWidth,GetHeight()); } else { DrawImage(pDC,rectDest.left,rectDest.top,nWidth-GetWidth(),GetHeight(),nPixel,0,nPixel,GetHeight()); DrawImage(pDC,nWidth-GetWidth(),rectDest.top); } } return true; } bool CImageEx::SetGray() { CImage *pImage = &m_ImageClone; if ( pImage == NULL && pImage->IsNull() ) { pImage = this; } int nWidth = pImage->GetWidth(); int nHeight = pImage->GetHeight(); BYTE* pArray = (BYTE*)pImage->GetBits(); int nPitch = pImage->GetPitch(); int nBitCount = pImage->GetBPP() / 8; for (int i = 0; i < nHeight; i++) { for (int j = 0; j < nWidth; j++) { int grayVal = (BYTE)(((*(pArray + nPitch * i + j * nBitCount) * 306) + (*(pArray + nPitch * i + j * nBitCount + 1) * 601) + (*(pArray + nPitch * i + j * nBitCount + 2) * 117) + 512 ) >> 10); // 计算灰度值 *(pArray + nPitch * i + j * nBitCount) = grayVal; // 赋灰度值 *(pArray + nPitch * i + j * nBitCount + 1) = grayVal; *(pArray + nPitch * i + j * nBitCount + 2) = grayVal; } } return true; } bool CImageEx::SetAlphaBit() { ASSERT(IsNull() == false); if(IsNull())return FALSE; if ( GetBPP() == 32 )//png图像 { LPVOID pBitsSrc = NULL; BYTE * psrc = NULL; BITMAP stBmpInfo; HBITMAP hBmp = (HBITMAP)*this; ::GetObject(hBmp, sizeof(BITMAP), &stBmpInfo); if (32 != stBmpInfo.bmBitsPixel || NULL == stBmpInfo.bmBits) return FALSE; psrc = (BYTE *) stBmpInfo.bmBits; for (int nPosY = 0; nPosY < abs(stBmpInfo.bmHeight); nPosY++) { for (int nPosX = stBmpInfo.bmWidth; nPosX > 0; nPosX--) { BYTE alpha = psrc[3]; psrc[0] = (BYTE)((psrc[0] * alpha) / 255); psrc[1] = (BYTE)((psrc[1] * alpha) / 255); psrc[2] = (BYTE)((psrc[2] * alpha) / 255); psrc += 4; } } } return TRUE; } void CImageEx::GetImageParament( CImage *pImg,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 CImageEx::InImage( CImage *pImg,int x,int y ) { IMAGEPARAMENT P; GetImageParament(pImg,&P); if ((x<0)||(y<0)||(x>=P.nWidth)||(y>=P.nHeight)) return 0; else return 1; } void CImageEx::SetRectValue(CImage *pImg,int x,int y,int Dx,int Dy,BYTE *buf ) { 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;iGetColorTable(0, P.nNumColors, ColorTab); } void CImageEx::SetAllPalette( CImage *pImg,RGBQUAD *ColorTab ) { IMAGEPARAMENT P; GetImageParament(pImg,&P); pImg->SetColorTable(0, P.nNumColors, ColorTab); } int CImageEx::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 CImageEx::ImageType() { RGBQUAD ColorTab[256]; int k; if (IsNull()) return(0); switch(GetBPP()) { case 1: k=0; break; case 4: k=1; break; case 8: k=3; break; default: k=4; break; } if (k==3) { GetColorTable(0,256,ColorTab); k=PaletteType(ColorTab); } return(k); } void CImageEx::RotateCimage( CImage *Imgn, int nAngle ) { double alpha = nAngle*3.141592654/180; 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() == 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(this,&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*) 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(); //建立结果位图 Imgn ->Create(ww, (int) (2 * Y1), P.nBitCount,CImage::createAlphaChannel ); if (P.nBitCount == 8) { GetAllPalette(this,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); } //png图像 if ( P.nBitCount == 32 ) { LPVOID pBitsSrc = NULL; BYTE * psrc = NULL; BITMAP stBmpInfo; HBITMAP hBmp = (HBITMAP)m_ImageClone; ::GetObject(hBmp, sizeof(BITMAP), &stBmpInfo); if (32 != stBmpInfo.bmBitsPixel || NULL == stBmpInfo.bmBits) return; psrc = (BYTE *) stBmpInfo.bmBits; for (int nPosY = 0; nPosY < abs(stBmpInfo.bmHeight); nPosY++) { for (int nPosX = stBmpInfo.bmWidth; nPosX > 0; nPosX--) { BYTE alpha = psrc[3]; psrc[0] = (BYTE)((psrc[0] * alpha) / 255); psrc[1] = (BYTE)((psrc[1] * alpha) / 255); psrc[2] = (BYTE)((psrc[2] * alpha) / 255); psrc += 4; } } } free(list); //释放工作单元 free(sc); } void CImageEx::SetRotation( int nAngle ) { if ( nAngle == 0 ) return; m_ImageClone.Destroy(); RotateCimage(&m_ImageClone,nAngle); } //////////////////////////////////////////////////////////////////////////////////