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mfc 动态加载dll库，Mat转CImage，读ini配置文件,鼠标操作,在edit控件上画框，调试信息打印

news 2025/7/28 22:09:01

动态加载dll库

h文件中添加

#include "mydll.h"
#ifdef UNICODE  //区分字符集
#define LoadLibrary  LoadLibraryW
#else
#define LoadLibrary  LoadLibraryA
#endif // !UNICODEtypedef double(*mydllPtr)(int, int);类内添加：
mydllPtr m_mydll;

cpp文件中添加

初始化函数中添加：HMODULE m_loadDll = LoadLibrary(TEXT("mydll.dll"));
if (m_loadDll == NULL)AfxMessageBox("mydll.dll load error.");//m_mydll对应dll库中的mydll函数
m_mydll = (mydllPtr)GetProcAddress(m_loadDll, "mydll");使用时：
m_mydll(int, int);

Mat转CImage，播放视频

//函数
void MatToCImage(Mat& mat, CImage& cimage)
{if (0 == mat.total()){return;}int nChannels = mat.channels();if ((1 != nChannels) && (3 != nChannels)){return;}int nWidth = mat.cols;int nHeight = mat.rows;//重建cimagecimage.Destroy();cimage.Create(nWidth, nHeight, 8 * nChannels);//拷贝数据uchar* pucRow;									//指向数据区的行指针uchar* pucImage = (uchar*)cimage.GetBits();		//指向数据区的指针int nStep = cimage.GetPitch();					//每行的字节数,注意这个返回值有正有负if (1 == nChannels)								//对于单通道的图像需要初始化调色板{RGBQUAD* rgbquadColorTable;int nMaxColors = 256;rgbquadColorTable = new RGBQUAD[nMaxColors];cimage.GetColorTable(0, nMaxColors, rgbquadColorTable);for (int nColor = 0; nColor < nMaxColors; nColor++){rgbquadColorTable[nColor].rgbBlue = (uchar)nColor;rgbquadColorTable[nColor].rgbGreen = (uchar)nColor;rgbquadColorTable[nColor].rgbRed = (uchar)nColor;}cimage.SetColorTable(0, nMaxColors, rgbquadColorTable);delete[]rgbquadColorTable;}for (int nRow = 0; nRow < nHeight; nRow++){pucRow = (mat.ptr<uchar>(nRow));for (int nCol = 0; nCol < nWidth; nCol++){if (1 == nChannels){*(pucImage + nRow * nStep + nCol) = pucRow[nCol];}else if (3 == nChannels){for (int nCha = 0; nCha < 3; nCha++){*(pucImage + nRow * nStep + nCol * 3 + nCha) = pucRow[nCol * 3 + nCha];}}}}}//使用
CRect rect;
GetDlgItem(IDC_STATIC_SHOW)->GetClientRect(&rect);
CDC* pDc = GetDlgItem(IDC_STATIC_SHOW)->GetDC();
pDc->SetStretchBltMode(COLORONCOLOR);
CImage image;
MatToCImage(mat, image);
image.Draw(pDc->m_hDC, rect);

读ini配置文件

CString m_serialPort;
GetPrivateProfileString("test", "com", "", m_serialPort.GetBuffer(100), 100, "./config.ini");config.ini文件
[test]
com=3

鼠标操作

左键按下弹起，右键按下弹起

h文件类内添加：
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);cpp文件中添加:BEGIN_MESSAGE_MAP(CIRCameraDemo_chaojingDlg, CDialogEx)...ON_WM_LBUTTONDOWN()ON_WM_LBUTTONUP()ON_WM_RBUTTONDOWN()...
END_MESSAGE_MAP()void CIRCameraDemo_chaojingDlg::OnLButtonDown(UINT nFlags, CPoint point)
{// TODO: 在此添加控件通知处理程序代码CDialogEx::OnLButtonDown(nFlags, point);
}void CIRCameraDemo_chaojingDlg::OnLButtonUp(UINT nFlags, CPoint point)
{// TODO: 在此添加控件通知处理程序代码CDialogEx::OnLButtonUp(nFlags, point);
}void CIRCameraDemo_chaojingDlg::OnRButtonDown(UINT nFlags, CPoint point)
{// TODO: 在此添加控件通知处理程序代码CDialogEx::OnRButtonDown(nFlags, point);
}

在Edit控件上画框

CDC* pDc = GetDlgItem(IDC_STATIC_SHOW)->GetDC();
CBrush *pOldBrush = (CBrush*)pDc->SelectStockObject(NULL_BRUSH);
CPen *pen = new CPen(PS_SOLID, 5, RGB(255, 0, 0));
CPen *pOldPen = pDc->SelectObject(pen);
pDc->Rectangle(CRect(m_startPoint, m_stopPoint));
pDc->SelectObject(pOldPen);
pDc->SelectObject(pOldBrush);
delete pen;