gdi

问题 I've modified the C# IWICBitmapSource.CopyPixels interface to allow both array marshaling and passing a pointer: void CopyPixels( WICRect prc, uint cbStride, uint cbBufferSize, [Out] [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] pbBuffer ); new void CopyPixels( WICRect prc, uint cbStride, uint cbBufferSize, IntPtr pbBuffer ); I'm calling it like this public static Bitmap FromWic(IWICBitmapSource source) { Guid format; source.GetPixelFormat(out format); PixelFormat gdiFormat =

问题 I needed to display flashing border in on top of chosen application's window (in my example the application is cmd.exe). I used layered windows for this purpose. Everything works fine, except the one thing: I can't bring target window (in my case - cmd.exe) in front if it is overlapped by another window (if another window is in the foreground). It works when I maximize/minimize target window, but doesn't work in case when target windows is overlapped. I can't restore in clicking on app's icon

问题 I have two windows, parent window where I'm rendering by D3D11 and second child window what I want to move over parent window. here is code how I'm creating windows: wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = 0; wcex.lpfnWndProc = WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = LoadIcon(NULL,IDI_APPLICATION); wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)0; wcex.lpszMenuName = 0; wcex.lpszClassName = L"Parent"; wcex

问题 I'm trying to make a layered window with c++ win32 but I'm having a problem with the drawing or "collision" of it For reference the picture that I'm trying to display. This is the basic creation of the window //window DWORD exFlags = 0; if(m_bTransparent) exFlags |= WS_EX_LAYERED; Create(WS_POPUP, exFlags); std::wstring sPic(L"power-disconnected.png"); m_pAlertPic = m_pPowerMon->GetGPPicMan()->LoadPicture(sPic.c_str()); // make the window layered when using transparency if(m_bTransparent && m

问题 I use BitBlt() and CreateBitmapSourceFromHBitmap() to capture a window as a BitmapSource that I can display on an Image element in a WPF application. But for some reason, most of the application that it captures is transparent. Here is a source vs. capture image of what's happening: (source: umbc.edu) It's gray because the background of the window it's on is gray. Whatever background I give the window will show through. How can I get the captured image to more accurately reflect the original?

问题 I am using code from this Project http://www.codeproject.com/Articles/9064/Yet-Another-Transparent-Static-Control in order to draw transparent button images from my subclassed Button control onto my CDialogEx. This code is meant for legacy 24bpp GDI functions: BOOL CTransparentStatic2::OnEraseBkgnd(CDC* pDC) { if (m_Bmp.GetSafeHandle() == NULL) { CRect Rect; GetWindowRect(&Rect); CWnd *pParent = GetParent(); ASSERT(pParent); pParent->ScreenToClient(&Rect); //convert our corrdinates to our

问题 I am using code from this Project http://www.codeproject.com/Articles/9064/Yet-Another-Transparent-Static-Control in order to draw transparent button images from my subclassed Button control onto my CDialogEx. This code is meant for legacy 24bpp GDI functions: BOOL CTransparentStatic2::OnEraseBkgnd(CDC* pDC) { if (m_Bmp.GetSafeHandle() == NULL) { CRect Rect; GetWindowRect(&Rect); CWnd *pParent = GetParent(); ASSERT(pParent); pParent->ScreenToClient(&Rect); //convert our corrdinates to our

问题 I need to draw with GDI graphics a circle on my form in WPF. I can't do this with windows forms, so i have added a using. I can not use the Elipse controls from WPF. My teacher told me to do this like this. This is my code: public void MakeLogo() { System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Green); System.Drawing.Graphics formGraphics = this.CreateGraphics(); formGraphics.FillEllipse(myBrush, new System.Drawing.Rectangle(0, 0, 200, 300)); myBrush

问题 I can not figure out if there is there any way in GDI32 to draw a string on two not adjacent areas (let's say Rectangles) on a form?. The text should automatically split if the edge of the first rectangle is reached as shown in the example picture. Thanks for your help. 回答1: An example, using two Labels and a TrackBar . The TrackBar determines a string position inside one Label, which reflects on the second Label each time the string is moved . This cascading effect is generated using the

问题 I'm trying to create a graphics library with graphics control. The control enables adding overlay controls. The graphics on the control uses DirectX and is part of the library, while the overlay controls are provided by end users of the library which are not graphics experts. Thus stability and convenient API are the most important issues. For technical reasons I need to show the graphics by DirectX directly on the control and cannot host the DirectX scene using another framework as WPF (For