private static int FPDF_SaveBlock(IntPtr fileWrite, IntPtr data, uint size)
{
var write = new FPDF_FILEWRITE();
Marshal.PtrToStructure(fileWrite, write);
var stream = StreamDictionary.Get((int)write.stream);
if (stream == null)
{
return(0);
}
byte[] buffer = new byte[size];
Marshal.Copy(data, buffer, 0, (int)size);
try
{
stream.Write(buffer, 0, (int)size);
return((int)size);
}
catch
{
return(0);
}
}
protected void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
StreamDictionary.Remove(_streamId);
if (_form != IntPtr.Zero)
{
PdfiumLibrary.FORM_DoDocumentAAction(_form, FPDFDOC_AACTION.WC);
PdfiumLibrary.FPDFDOC_ExitFormFillEnvironment(_form);
_form = IntPtr.Zero;
}
if (_document != IntPtr.Zero)
{
PdfiumLibrary.FPDF_CloseDocument(_document);
_document = IntPtr.Zero;
}
if (_formCallbacksHandle.IsAllocated)
{
_formCallbacksHandle.Free();
}
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
_disposed = true;
}
public PdfObject(Stream pdfStream, string password)
{
if (pdfStream == null)
{
throw new ArgumentNullException(nameof(pdfStream));
}
PdfiumLibrary.Init();
_stream = pdfStream;
_streamId = StreamDictionary.Add(pdfStream);
var document = PdfiumLibrary.FPDF_LoadCustomDocument(pdfStream, password, _streamId);
if (document == IntPtr.Zero)
{
throw new PdfException(PdfiumLibrary.FPDF_GetLastError());
}
LoadDocument(document);
}
private static int FPDF_GetBlock(IntPtr id, uint position, IntPtr buffer, uint size)
{
var stream = StreamDictionary.Get((int)id);
if (stream == null)
{
return(0);
}
byte[] managedBuffer = new byte[size];
stream.Position = position;
int read = stream.Read(managedBuffer, 0, (int)size);
if (read != size)
{
return(0);
}
Marshal.Copy(managedBuffer, 0, buffer, (int)size);
return(1);
}
public static bool FPDF_SaveAsCopy(IntPtr doc, Stream output, FPDF_SAVE_FLAGS flags)
{
int id = StreamDictionary.Add(output);
try
{
var write = new FPDF_FILEWRITE
{
stream = (IntPtr)id,
version = 1,
WriteBlock = Marshal.GetFunctionPointerForDelegate(_saveBlockDelegate)
};
lock (_mutex)
{
return(API.FPDF_SaveAsCopy(doc, write, flags));
}
}
finally
{
StreamDictionary.Remove(id);
}
}