public void Save(Stream outputStream)
{
if (_iconData != null)
{
ArgumentNullException.ThrowIfNull(outputStream);
outputStream.Write(_iconData, 0, _iconData.Length);
}
else
{
// Ideally, we would pick apart the icon using
// GetIconInfo, and then pull the individual bitmaps out,
// converting them to DIBS and saving them into the file.
// But, in the interest of simplicity, we just call to
// OLE to do it for us.
PICTDESC pictdesc = PICTDESC.CreateIconPICTDESC(Handle);
Guid g = typeof(IPicture).GUID;
IPicture picture = OleCreatePictureIndirect(pictdesc, ref g, false);
if (picture != null)
{
try
{
ArgumentNullException.ThrowIfNull(outputStream);
picture.SaveAsFile(new GPStream(outputStream, makeSeekable: false), -1, out int temp);
}
finally
{
Debug.Assert(RuntimeInformation.IsOSPlatform(OSPlatform.Windows));
Marshal.ReleaseComObject(picture);
}
}
}
}
public unsafe void Save(Stream outputStream)
{
if (_iconData != null)
{
outputStream.Write(_iconData, 0, _iconData.Length);
}
else
{
if (outputStream == null)
{
throw new ArgumentNullException(nameof(outputStream));
}
// Ideally, we would pick apart the icon using
// GetIconInfo, and then pull the individual bitmaps out,
// converting them to DIBS and saving them into the file.
// But, in the interest of simplicity, we just call to
// OLE to do it for us.
PICTDESC pictdesc = PICTDESC.CreateIconPICTDESC(Handle);
Guid iid = DrawingCom.IPicture.IID;
IntPtr lpPicture;
Marshal.ThrowExceptionForHR(OleCreatePictureIndirect(&pictdesc, &iid, fOwn: 0, &lpPicture));
IntPtr streamPtr = IntPtr.Zero;
try
{
// Use UniqueInstance here because we never want to cache the wrapper. It only gets used once and then disposed.
using DrawingCom.IPicture picture = (DrawingCom.IPicture)DrawingCom.Instance
.GetOrCreateObjectForComInstance(lpPicture, CreateObjectFlags.UniqueInstance);
var gpStream = new GPStream(outputStream, makeSeekable: false);
streamPtr = DrawingCom.Instance.GetOrCreateComInterfaceForObject(gpStream, CreateComInterfaceFlags.None);
DrawingCom.ThrowExceptionForHR(picture.SaveAsFile(streamPtr, -1, null));
}
finally
{
if (streamPtr != IntPtr.Zero)
{
int count = Marshal.Release(streamPtr);
Debug.Assert(count == 0);
}
if (lpPicture != IntPtr.Zero)
{
int count = Marshal.Release(lpPicture);
Debug.Assert(count == 0);
}
}
}
}
public void Save(Stream outputStream)
{
if (_iconData != null)
{
outputStream.Write(_iconData, 0, _iconData.Length);
}
else
{
// Ideally, we would pick apart the icon using
// GetIconInfo, and then pull the individual bitmaps out,
// converting them to DIBS and saving them into the file.
// But, in the interest of simplicity, we just call to
// OLE to do it for us.
PICTDESC pictdesc = PICTDESC.CreateIconPICTDESC(Handle);
Guid g = typeof(IPicture).GUID;
IPicture picture = OleCreatePictureIndirect(pictdesc, ref g, false);
if (picture != null)
{
try
{
// We threw this way on NetFX
if (outputStream == null)
{
throw new ArgumentNullException("dataStream");
}
picture.SaveAsFile(new GPStream(outputStream, makeSeekable: false), -1, out int temp);
}
finally
{
Marshal.ReleaseComObject(picture);
}
}
}
}
internal static extern IPicture OleCreatePictureIndirect(PICTDESC pictdesc, [In] ref Guid refiid, bool fOwn);
