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;
}
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);
}