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这篇CFSDN的博客文章C++实现截图截屏的示例代码由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

1、截图工具

1.1 键盘截图(PrtScn键)

如何使用Microsoft Windows操作系统中的Print Screen（打印屏幕）键 （1）Print Screen键 按下之后，截取整个屏幕的画面到剪切板里。可以复制到其他软件里，比如系统的画图工具，Office Word等.

（2）Alt+Print Screen组合键 按下之后，截取当前活动窗口的画面到剪切板里.

1.2 win10自带截图(Win+Shift+S)

按下该组合键之后，使用鼠标在屏幕上画出想要截取的矩形区域，自动保存到系统剪切板里.

1.3 系统自带的截图小工具

1.4 ffmpeg

ffmpeg -i “输入视频” -fflags nobuffer -t 60 -ss 0 “输出地址” 说明：代表截取输入视频从0秒到60秒的片段，保存到输出地址。 -ss n : 起始时间为第n秒 -t n : 总共截取的片段时长为n秒 。

运行后会生成截图： out1.jpg out2.jpg out3.jpg … 。

ffmpeg -i fight.mp4 -r 1 -t 200 -ss 1 -f image2 out%d.jpg

1.5 ScreenToGif

1.6 Chrome

  。

2、C++、GDI

2.1 微软官方例子

https://docs.microsoft.com/en-us/windows/win32/gdi/capturing-an-image 。

int CaptureAnImage(HWND hWnd){  HDC hdcScreen;  HDC hdcWindow;  HDC hdcMemDC = NULL;  HBITMAP hbmScreen = NULL;  BITMAP bmpScreen;  DWORD dwBytesWritten = 0;  DWORD dwSizeofDIB = 0;  HANDLE hFile = NULL;  char* lpbitmap = NULL;  HANDLE hDIB = NULL;  DWORD dwBmpSize = 0;  // Retrieve the handle to a display device context for the client   // area of the window.   hdcScreen = GetDC(NULL);  hdcWindow = GetDC(hWnd);  // Create a compatible DC, which is used in a BitBlt from the window DC.  hdcMemDC = CreateCompatibleDC(hdcWindow);  if (!hdcMemDC)  {      MessageBox(hWnd, L"CreateCompatibleDC has failed", L"Failed", MB_OK);      goto done;  }  // Get the client area for size calculation.  RECT rcClient;  GetClientRect(hWnd, &rcClient);  // This is the best stretch mode.  SetStretchBltMode(hdcWindow, HALFTONE);  // The source DC is the entire screen, and the destination DC is the current window (HWND).  if (!StretchBlt(hdcWindow,      0, 0,      rcClient.right, rcClient.bottom,      hdcScreen,      0, 0,      GetSystemMetrics(SM_CXSCREEN),      GetSystemMetrics(SM_CYSCREEN),      SRCCOPY))  {      MessageBox(hWnd, L"StretchBlt has failed", L"Failed", MB_OK);      goto done;  }  // Create a compatible bitmap from the Window DC.  hbmScreen = CreateCompatibleBitmap(hdcWindow, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top);  if (!hbmScreen)  {      MessageBox(hWnd, L"CreateCompatibleBitmap Failed", L"Failed", MB_OK);      goto done;  }  // Select the compatible bitmap into the compatible memory DC.  SelectObject(hdcMemDC, hbmScreen);  // Bit block transfer into our compatible memory DC.  if (!BitBlt(hdcMemDC,      0, 0,      rcClient.right - rcClient.left, rcClient.bottom - rcClient.top,      hdcWindow,      0, 0,      SRCCOPY))  {      MessageBox(hWnd, L"BitBlt has failed", L"Failed", MB_OK);      goto done;  }  // Get the BITMAP from the HBITMAP.  GetObject(hbmScreen, sizeof(BITMAP), &bmpScreen);  BITMAPFILEHEADER   bmfHeader;  BITMAPINFOHEADER   bi;  bi.biSize = sizeof(BITMAPINFOHEADER);  bi.biWidth = bmpScreen.bmWidth;  bi.biHeight = bmpScreen.bmHeight;  bi.biPlanes = 1;  bi.biBitCount = 32;  bi.biCompression = BI_RGB;  bi.biSizeImage = 0;  bi.biXPelsPerMeter = 0;  bi.biYPelsPerMeter = 0;  bi.biClrUsed = 0;  bi.biClrImportant = 0;  dwBmpSize = ((bmpScreen.bmWidth * bi.biBitCount + 31) / 32) * 4 * bmpScreen.bmHeight;  // Starting with 32-bit Windows, GlobalAlloc and LocalAlloc are implemented as wrapper functions that   // call HeapAlloc using a handle to the process's default heap. Therefore, GlobalAlloc and LocalAlloc   // have greater overhead than HeapAlloc.  hDIB = GlobalAlloc(GHND, dwBmpSize);  lpbitmap = (char*)GlobalLock(hDIB);  // Gets the "bits" from the bitmap, and copies them into a buffer   // that's pointed to by lpbitmap.  GetDIBits(hdcWindow, hbmScreen, 0,      (UINT)bmpScreen.bmHeight,      lpbitmap,      (BITMAPINFO*)&bi, DIB_RGB_COLORS);  // A file is created, this is where we will save the screen capture.  hFile = CreateFile(L"captureqwsx.bmp",      GENERIC_WRITE,      0,      NULL,      CREATE_ALWAYS,      FILE_ATTRIBUTE_NORMAL, NULL);  // Add the size of the headers to the size of the bitmap to get the total file size.  dwSizeofDIB = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);  // Offset to where the actual bitmap bits start.  bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);  // Size of the file.  bmfHeader.bfSize = dwSizeofDIB;  // bfType must always be BM for Bitmaps.  bmfHeader.bfType = 0x4D42; // BM.  WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);  WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);  WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &dwBytesWritten, NULL);  // Unlock and Free the DIB from the heap.  GlobalUnlock(hDIB);  GlobalFree(hDIB);  // Close the handle for the file that was created.  CloseHandle(hFile);  // Clean up.done:  DeleteObject(hbmScreen);  DeleteObject(hdcMemDC);  ReleaseDC(NULL, hdcScreen);  ReleaseDC(hWnd, hdcWindow);  return 0;}

2.2 C++、GDI、CImage

HDC hdcSrc = GetDC(NULL);int nBitPerPixel = GetDeviceCaps(hdcSrc, BITSPIXEL);int nWidth = GetDeviceCaps(hdcSrc, HORZRES);int nHeight = GetDeviceCaps(hdcSrc, VERTRES);CImage image;image.Create(nWidth, nHeight, nBitPerPixel);BitBlt(image.GetDC(), 0, 0, nWidth, nHeight, hdcSrc, 0, 0, SRCCOPY);ReleaseDC(NULL, hdcSrc);image.ReleaseDC();image.Save(s, Gdiplus::ImageFormatPNG);

  。

3、C++、OpenGL

void CaptureOpenGLWindow(const char* savePath, int w, int h){	GLubyte* pPixelData; 	GLint    PixelDataLength;  	// 分配内存和打开文件	pPixelData = (GLubyte*)malloc(w*h*3);	if (pPixelData == 0)		return;		glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 	glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, pPixelData);	stbi_write_png(savePath, w, h, 3, pPixelData, 0);	free(pPixelData);	int iw = w, ih = h, n = 3;	stbi_set_flip_vertically_on_load(true);	unsigned char *idata = stbi_load(savePath, &iw, &ih, &n, 0);	stbi_write_png(savePath, w, h, 3, idata, 0);	stbi_image_free(idata);}

  。

4、C++、OpenCV

BITMAPINFOHEADER createBitmapHeader(int width, int height){ BITMAPINFOHEADER  bi;   // create a bitmap   bi.biSize = sizeof(BITMAPINFOHEADER);   bi.biWidth = width;   bi.biHeight = -height;  //this is the line that makes it draw upside down or not   bi.biPlanes = 1;   bi.biBitCount = 32;   bi.biCompression = BI_RGB;   bi.biSizeImage = 0;   bi.biXPelsPerMeter = 0;   bi.biYPelsPerMeter = 0;   bi.biClrUsed = 0;   bi.biClrImportant = 0;   return bi;}Mat captureScreenMat(HWND hwnd){   Mat src;   // get handles to a device context (DC)   HDC hwindowDC = GetDC(hwnd);   HDC hwindowCompatibleDC = CreateCompatibleDC(hwindowDC);   SetStretchBltMode(hwindowCompatibleDC, COLORONCOLOR);   // define scale, height and width   int screenx = GetSystemMetrics(SM_XVIRTUALSCREEN);   int screeny = GetSystemMetrics(SM_YVIRTUALSCREEN);   int width = GetSystemMetrics(SM_CXVIRTUALSCREEN);   int height = GetSystemMetrics(SM_CYVIRTUALSCREEN);   // create mat object   src.create(height, width, CV_8UC4);   // create a bitmap   HBITMAP hbwindow = CreateCompatibleBitmap(hwindowDC, width, height);   BITMAPINFOHEADER bi = createBitmapHeader(width, height);   // use the previously created device context with the bitmap   SelectObject(hwindowCompatibleDC, hbwindow);   // copy from the window device context to the bitmap device context   StretchBlt(hwindowCompatibleDC, 0, 0, width, height, hwindowDC, screenx, screeny, width, height, SRCCOPY);  //change SRCCOPY to NOTSRCCOPY for wacky colors !   GetDIBits(hwindowCompatibleDC, hbwindow, 0, height, src.data, (BITMAPINFO*)&bi, DIB_RGB_COLORS);            //copy from hwindowCompatibleDC to hbwindow   // avoid memory leak   DeleteObject(hbwindow);   DeleteDC(hwindowCompatibleDC);   ReleaseDC(hwnd, hwindowDC);   return src;}int main(){    // capture image    HWND hwnd = GetDesktopWindow();    Mat src = captureScreenMat(hwnd);    // save img    cv::imwrite("Screenshot.png", src);	  // clean-ups    buf.clear();    return 0;}

  。

5、C++、QT

QDesktopWidget *desk = QApplication::desktop();QScreen * screen = QGuiApplication::primaryScreen();QPixmap p = screen->grabWindow(desk->winId());QImage image = p.toImage();

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原文链接：https://blog.csdn.net/hhy321/article/details/121548612 。

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