protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
StreamManager.Unregister(_id);
if (_form != IntPtr.Zero)
{
NativeMethods.FORM_DoDocumentAAction(_form, NativeMethods.FPDFDOC_AACTION.WC);
NativeMethods.FPDFDOC_ExitFormFillEnvironment(_form);
_form = IntPtr.Zero;
}
if (_document != IntPtr.Zero)
{
NativeMethods.FPDF_CloseDocument(_document);
_document = IntPtr.Zero;
}
if (_formCallbacksHandle.IsAllocated)
{
_formCallbacksHandle.Free();
}
_stream?.Dispose();
_disposed = true;
}
}
private static int _fPDF_SaveBlock(IntPtr fileWrite, IntPtr data, uint size)
{
var write = new FPDF_FILEWRITE();
Marshal.PtrToStructure(fileWrite, write);
var stream = StreamManager.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);
}
}
public PdfFile(Stream stream, string?password)
{
PdfLibrary.EnsureLoaded();
_stream = stream ?? throw new ArgumentNullException(nameof(stream));
_id = StreamManager.Register(stream);
var document = NativeMethods.FPDF_LoadCustomDocument(stream, password, _id);
if (document == IntPtr.Zero)
{
throw new PdfException((PdfError)NativeMethods.FPDF_GetLastError());
}
LoadDocument(document);
}
private static int _fPDF_GetBlock(IntPtr param, uint position, IntPtr buffer, uint size)
{
var stream = StreamManager.Get((int)param);
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_SaveWithVersion(IntPtr doc, Stream output, FPDF_SAVE_FLAGS flags, int fileVersion)
{
int id = StreamManager.Register(output);
try
{
var write = new FPDF_FILEWRITE
{
stream = (IntPtr)id,
version = 1,
WriteBlock = Marshal.GetFunctionPointerForDelegate(_saveBlockDelegate)
};
lock (_lockString)
{
return(Imports.FPDF_SaveWithVersion(doc, write, flags, fileVersion));
}
}
finally
{
StreamManager.Unregister(id);
}
}