Exemplo n.º 1
0
        private static void Initialize()
        {
            if (s_isInitialized)
            {
                return;
            }

            using ScreenDC dc = ScreenDC.Create();
            s_deviceDpi       = Interop.Gdi32.GetDeviceCaps(dc, Interop.Gdi32.DeviceCapability.LOGPIXELSX);
            s_isInitialized   = true;
        }
Exemplo n.º 2
0
        private IntPtr GetCompatibleBitmap(Bitmap bm)
        {
            using ScreenDC hDC = ScreenDC.Create();

            // GDI+ returns a DIBSECTION based HBITMAP. The clipboard deals well
            // only with bitmaps created using CreateCompatibleBitmap(). So, we
            // convert the DIBSECTION into a compatible bitmap.
            IntPtr hBitmap = bm.GetHbitmap();

            // Create a compatible DC to render the source bitmap.
            IntPtr dcSrc  = Gdi32.CreateCompatibleDC(hDC);
            IntPtr srcOld = Gdi32.SelectObject(dcSrc, hBitmap);

            // Create a compatible DC and a new compatible bitmap.
            IntPtr dcDest     = Gdi32.CreateCompatibleDC(hDC);
            IntPtr hBitmapNew = Gdi32.CreateCompatibleBitmap(hDC, bm.Size.Width, bm.Size.Height);

            // Select the new bitmap into a compatible DC and render the blt the original bitmap.
            IntPtr destOld = Gdi32.SelectObject(dcDest, hBitmapNew);

            Gdi32.BitBlt(
                dcDest,
                0,
                0,
                bm.Size.Width,
                bm.Size.Height,
                dcSrc,
                0,
                0,
                Gdi32.ROP.SRCCOPY);

            // Clear the source and destination compatible DCs.
            Gdi32.SelectObject(dcSrc, srcOld);
            Gdi32.SelectObject(dcDest, destOld);

            Gdi32.DeleteDC(dcSrc);
            Gdi32.DeleteDC(dcDest);

            return(hBitmapNew);
        }