public static IntPtr Alloc(IGRStream stream, bool writable)
{
var payloadSize = Marshaler.SizeOf <Payload>();
var retval = Marshal.AllocHGlobal(payloadSize);
var self = StreamHolder.Instance.Register(stream);
var payload = new Payload
{
Open = Methods.Instance.Open.Item1,
Read = Methods.Instance.Read.Item1,
Seek = Methods.Instance.Seek.Item1,
Close = Methods.Instance.Close.Item1,
Write = Methods.Instance.Write.Item1,
StreamObjectRef = self
};
Marshaler.StructureToPtr <Payload>(payload, retval, false);
if (!writable)
{
Error_Control_Block ecb = new Error_Control_Block();
DocumentFiltersBase.Check(ISYS11df.IGR_Extend_Stream(retval, Methods.Instance.StreamCallback.Item1, retval, ref retval, ref ecb), ecb);
}
return(retval);
}
internal Canvas(DocumentFiltersBase parent, IGRStream stream, CanvasType type, string options)
{
_type = type;
_options = options;
_stream = stream;
_streamHandle = stream.NewWritableStreamPtr();
}
internal Canvas(DocumentFiltersBase parent, System.IO.Stream stream, CanvasType type, string options)
{
_type = type;
_options = options;
_stream = new IGRStreamBridge(stream);
_streamHandle = _stream.NewWritableStreamPtr();
}
public long Register(IGRStream stream)
{
lock (this)
{
long retval = ++_lastid;
_streams.Add(retval, stream);
return(retval);
}
}
virtual public void Close(bool closeStream = true)
{
if (_handle > 0)
{
Check(ISYS11df.IGR_Close_File(_handle, ref ecb));
_handle = 0;
}
if (closeStream && _streamHandle != IntPtr.Zero)
{
IGRStream.DestroyStreamPtr(_streamHandle);
_streamHandle = IntPtr.Zero;
}
}
public void Close()
{
if (_handle > 0)
{
Check(ISYS11df.IGR_Close_Canvas(_handle, ref ecb));
_handle = 0;
}
if (_streamHandle != IntPtr.Zero)
{
IGRStream.DestroyStreamPtr(_streamHandle);
_streamHandle = IntPtr.Zero;
}
}
public Extractor GetExtractor(IGRStream stream)
{
VerifyArgumentNotNull(stream, "stream");
return(new Extractor(prepare(), stream));
}
public Canvas MakeOutputCanvas(IGRStream stream, int type, string options)
{
VerifyArgumentNotNull(stream, "stream");
return(MakeOutputCanvas(stream, (CanvasType)type, options));
}
public Canvas MakeOutputCanvas(IGRStream stream, CanvasType type, string options = "")
{
VerifyArgumentNotNull(stream, "stream");
return(new Canvas(prepare(), stream, type, options));
}
internal Extractor(DocumentFiltersBase parent, System.IO.Stream stream)
{
_stream = new IGRStreamBridge(stream);
_streamHandle = _stream.NewStreamPtr();
}
internal Extractor(DocumentFiltersBase parent, IGRStream stream)
{
_stream = stream;
_streamHandle = stream.NewStreamPtr();
}
