/// <summary>
/// Create an OpenWF Composition element.
/// </summary>
/// <param name="device">
/// A <see cref="WfcDevice"/> which the source is created on.
/// </param>
/// <param name="ctx">
/// A <see cref="WfcContext"/> which the source is created on.
/// </param>
internal WfcElement(WfcDevice device, WfcContext ctx)
{
if (device == null)
{
throw new ArgumentNullException("device");
}
if ((_Handle = Wfc.CreateElement(device.Handle, ctx.Handle, null)) == Wfc.INVALID_HANDLE)
{
throw new InvalidOperationException(String.Format("unable to create OpenWF element"));
}
_Device = device;
}
/// <summary>
/// Create an OpenWF Composition source.
/// </summary>
/// <param name="device">
/// A <see cref="WfcDevice"/> which the source is created on.
/// </param>
/// <param name="ctx">
/// A <see cref="WfcContext"/> which the source is created on.
/// </param>
/// <param name="stream">
/// A <see cref="NativeStreamType"/> that specifies the native source stream.
/// </param>
internal WfcSource(WfcDevice device, WfcContext ctx, NativeStreamType stream)
{
if (device == null)
{
throw new ArgumentNullException("device");
}
if ((_Handle = Wfc.CreateSourceFromStream(device.Handle, ctx.Handle, stream, null)) == Wfc.INVALID_HANDLE)
{
throw new InvalidOperationException(String.Format("unable to create OpenWF source"));
}
_Device = device;
}