/************************************************************************* * * CopyScreenToBitmap() * * Parameter: * * LPRECT lpRect - specifies the window * * Return Value: * * HDIB - identifies the device-dependent bitmap * * Description: * * This function copies the specified part of the screen to a device- * dependent bitmap. * * ************************************************************************/ void CDib::CopyFromScreen(const CRect& rectIn) { // check for an empty rectangle if (rectIn.IsRectEmpty()) { Empty(); return; } CDC ScrDC; CDC MemDC; // create a DC for the screen and create // a memory DC compatible to screen DC ScrDC.CreateDCW(L"DISPLAY", NULL, NULL, NULL); MemDC.CreateCompatibleDC(&ScrDC); // get screen resolution int xScrn = ScrDC.GetDeviceCaps(HORZRES); int yScrn = ScrDC.GetDeviceCaps(VERTRES); CRect rect(rectIn); rect.NormalizeRect(); //make sure bitmap rectangle is visible if (rect.left < 0) rect.left = 0; if (rect.top < 0) rect.top = 0; if (rect.right > xScrn) rect.right = xScrn; if (rect.bottom> yScrn) rect.bottom = yScrn; // create a bitmap compatible with the screen DC CreateDib( CSize(rect.Width(), rect.Height()), 32); CBitmap* pBitmap = CBitmap::FromHandle( (HBITMAP)(*this)); //pBitmap->GetBitmap(&bmp); //ASSERT(false); //HBITMAP hBitmap = NULL;//C reateCompatibleDIB( ScrDC, rect.Width(), rect.Height()); // select new bitmap into memory DC CBitmap* pOldBitmap = MemDC.SelectObject(pBitmap); //HBITMAP hOldBitmap = (HBITMAP)MemDC.SelectObject((hBitmap); // bitblt screen DC to memory DC MemDC.BitBlt(0, 0, rect.Width(), rect.Height(), &ScrDC, rect.left, rect.top, SRCCOPY); //CreatePaletteFromImage(m_palette); // select old bitmap back into memory DC and get handle to // bitmap of the screen //hBitmap = (HBITMAP)MemDC.SelectObject(hOldBitmap); MemDC.SelectObject(pOldBitmap); // clean up ScrDC.DeleteDC(); MemDC.DeleteDC(); }