GDI特效2

 

void CEffect::SmallToBig(HDC dc, HDC memdc, CRect rtReDraw ){int ScreenW = GetSystemMetrics(SM_CXSCREEN);int ScreenH = GetSystemMetrics(SM_CYSCREEN);int HStep = 35;int WStep = ScreenW*HStep/ScreenH;HDCMemdc2  = CreateCompatibleDC(dc);HBITMAP Membmp = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );::SelectObject(Memdc2, Membmp);::BitBlt(Memdc2, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);for (int i=HStep; i<=ScreenH; i+=HStep) //方块从小到大{WStep = ScreenW*i/ScreenH;::BitBlt(Memdc2 ,(ScreenW-WStep)/2 , (ScreenH-i)/2,WStep ,i,  memdc,(ScreenW-WStep)/2  ,(ScreenH-i)/2, SRCCOPY);::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);}::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), memdc, 0, 0, SRCCOPY);::DeleteDC(Memdc2);::DeleteObject(Membmp);}void CEffect::BigToSmall(HDC dc, HDC memdc, CRect rtReDraw ){int ScreenW = GetSystemMetrics(SM_CXSCREEN);int ScreenH = GetSystemMetrics(SM_CYSCREEN);int HStep = 35;int WStep = ScreenW*HStep/ScreenH;HDCMemdc2  = CreateCompatibleDC(dc);HBITMAP Membmp = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );::SelectObject(Memdc2, Membmp);::BitBlt(Memdc2, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);    for (int i=HStep; i<=ScreenH; i+=HStep){WStep = ScreenW*i/ScreenH;::BitBlt(Memdc2 ,0, 0 ,ScreenW,i , memdc,0 ,0, SRCCOPY); //横条顶端往下::BitBlt(Memdc2 ,0, ScreenH-i ,ScreenW,i , memdc,0 ,ScreenH-i, SRCCOPY); //横条底端往下::BitBlt(Memdc2 ,0, 0,WStep,ScreenH , memdc,0 ,0, SRCCOPY); //竖条左边往右        ::BitBlt(Memdc2 ,ScreenW-WStep, 0 ,WStep,ScreenH , memdc,ScreenW-WStep,0, SRCCOPY); //竖条右边往左    ::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);} ::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), memdc, 0, 0, SRCCOPY);::DeleteDC(Memdc2);::DeleteObject(Membmp);}void CEffect::DownToUp(HDC dc, HDC memdc, CRect rtReDraw){int ScreenW = GetSystemMetrics(SM_CXSCREEN);int ScreenH = GetSystemMetrics(SM_CYSCREEN);int Step = 8;HDCMemdc2  = CreateCompatibleDC(dc);HDCMemdc3  = CreateCompatibleDC(dc);HBITMAP Membmp = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );HBITMAP Membmp3 = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );::SelectObject(Memdc2, Membmp);::SelectObject(Memdc3, Membmp3);::BitBlt(Memdc2, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);::BitBlt(Memdc3, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);if (rtReDraw.Width() > 720)Step = 20;for( int i = Step ; i <= ScreenH; i+= Step ){::BitBlt(Memdc2, rtReDraw.left, 0, rtReDraw.Width(), ScreenH - i, Memdc3, 0, i, SRCCOPY);::BitBlt(Memdc2 , rtReDraw.left, ScreenH - i , rtReDraw.Width(), i, memdc, 0, 0, SRCCOPY);::BitBlt(dc, rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);}if( i != ScreenH + Step ){::BitBlt(Memdc2 , 0, rtReDraw.top, ScreenW, rtReDraw.Height(), memdc, 0, 0, SRCCOPY);::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);}::DeleteDC(Memdc2);::DeleteDC(Memdc3);::DeleteObject(Membmp);::DeleteObject(Membmp3);}void CEffect::UpToDown(HDC dc, HDC memdc, CRect rtReDraw) //由上到下{int ScreenW = GetSystemMetrics(SM_CXSCREEN);int ScreenH = GetSystemMetrics(SM_CYSCREEN);int Step = 8;HDCMemdc2  = CreateCompatibleDC(dc);HDCMemdc3  = CreateCompatibleDC(dc);HBITMAP Membmp = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );HBITMAP Membmp3 = CreateCompatibleBitmap(dc, rtReDraw.Width(), rtReDraw.Height() );::SelectObject(Memdc2, Membmp);::SelectObject(Memdc3, Membmp3);::BitBlt(Memdc2, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);::BitBlt(Memdc3, 0, 0, rtReDraw.Width(), rtReDraw.Height(),  dc, rtReDraw.left, rtReDraw.top, SRCCOPY);if (rtReDraw.Width() > 720){Step = 20;}for( int i = Step ; i <= ScreenH; i+= Step ){::BitBlt(Memdc2, rtReDraw.left, i, rtReDraw.Width() , ScreenH - i, Memdc3, 0, 0, SRCCOPY);::BitBlt(Memdc2 , 0, rtReDraw.top, rtReDraw.Width(), i, memdc, 0, ScreenH - i, SRCCOPY);::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);}if( i != ScreenH + Step ){::BitBlt(Memdc2 , 0, rtReDraw.top, ScreenW, rtReDraw.Height(), memdc, 0, 0, SRCCOPY);::BitBlt(dc,  rtReDraw.left, rtReDraw.top, rtReDraw.Width(), rtReDraw.Height(), Memdc2, 0, 0, SRCCOPY);}::DeleteDC(Memdc2);::DeleteDC(Memdc3);::DeleteObject(Membmp);::DeleteObject(Membmp3);}