mfc 选择文件并显示

来源：互联网发布：java中compareto的用法编辑：程序博客网时间：2024/05/30 23:43

void CtestSendDlg::FillBitmapInfo(BITMAPINFO* bmi, int width, int height, int bpp){ASSERT(bmi && width>0 && height>0 && (bpp==8 || bpp==24 || bpp==32));BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);memset((void *)bmih, 0x00, sizeof(BITMAPINFOHEADER));bmih->biSize = sizeof(BITMAPINFOHEADER);bmih->biWidth = width;bmih->biHeight = -abs(height);bmih->biPlanes = 1;bmih->biBitCount = bpp;bmih->biCompression = BI_RGB;if (8 == bpp){RGBQUAD* palette = bmi->bmiColors;for (int i = 0; i < 256; i++){palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;palette[i].rgbReserved = 0;}}}void CtestSendDlg::DisplayOpencvImg(IplImage *pImg, HDC hdc, CRect& rect ){ BITMAPINFO bmi;FillBitmapInfo( &bmi, pImg->width, pImg->height, 24 );if(bmi.bmiHeader.biBitCount== 8){HPALETTE hpal=NULL;HPALETTE hOldPal=NULL;::SetPaletteEntries(hpal,0,256,(LPPALETTEENTRY)bmi.bmiColors);hOldPal = ::SelectPalette(hdc, hpal, TRUE);}::SetStretchBltMode(hdc, COLORONCOLOR);::StretchDIBits(hdc,rect.left,rect.top,rect.Width(),rect.Height(),0,0,pImg->width,pImg->height,pImg->imageData,&bmi,DIB_RGB_COLORS,SRCCOPY); }

void CtestSendDlg::OnBnClickedButtonImg(){// TODO: 在此添加控件通知处理程序代码CString FilePathName;CFileDialog filedlg(true); //显示打开对话框filedlg.m_ofn.lpstrTitle="打开";filedlg.m_ofn.lpstrFilter="所有图片文件(*.bmp;*.jpg;*.jpeg;*.png)|*.bmp;*.jpg;*.jpeg;*.png|位图文件(*.bmp)|*.bmp|JPEG(*.jpg;*.jpeg)|*.jpg;*.jpeg|PNG(*.png)|*.png";if(IDOK == filedlg.DoModal())    {FilePathName=filedlg.GetPathName();IplImage* srcImg = cvLoadImage( FilePathName );if( !srcImg ){AfxMessageBox( "你选择的不是照片" );return;}GetDlgItem(IDC_EDIT_PATH)->SetWindowTextA(FilePathName.GetBuffer());//取出文件路径,将文件的路径放入FilePath UpdateData(FALSE);CRect   rect;CWnd *pWnd = NULL;pWnd = GetDlgItem(IDC_SHOW_IMG);//获取控件句柄   pWnd->GetClientRect(&rect);//获取句柄指向控件区域的大小   CDC *pDc = NULL;pDc = pWnd->GetDC();//获取picture的DCGetDlgItem(IDC_EDIT_PATH)->GetWindowTextA(FilePathName);IplImage* dstImg = cvCreateImage( cvSize( rect.right, rect.bottom ), srcImg->depth, srcImg->nChannels );cvResize( srcImg, dstImg );DisplayOpencvImg( dstImg, *pDc, rect );cvReleaseImage( &srcImg );cvReleaseImage( &dstImg );ReleaseDC(pDc); }}

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