private static int FPDF_SaveBlock(IntPtr fileWrite, IntPtr data, uint size)
{
FPDF_FILEWRITE write = new FPDF_FILEWRITE();
Marshal.PtrToStructure(fileWrite, write);
Stream stream = Marshal.GetObjectForIUnknown(write.stream) as 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);
}
}
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);
}
}
/// <summary>
/// Saves a PDF document to a stream.
/// </summary>
/// <param name="version">
/// The new PDF file version of the saved file.
/// 14 for 1.4, 15 for 1.5, etc. Values smaller than 10 are ignored.
/// </param>
/// <seealso cref="PDFium.FPDF_SaveAsCopy(FPDF_DOCUMENT, FPDF_FILEWRITE, SaveFlags)" />
/// <seealso cref="PDFium.FPDF_SaveWithVersion(FPDF_DOCUMENT, FPDF_FILEWRITE, SaveFlags, int)" />
public static bool FPDF_SaveAsCopy(FPDF_DOCUMENT document, Stream stream, SaveFlags flags, int version = 0)
{
byte[] buffer = null;
var fileWrite = new FPDF_FILEWRITE((ignore, data, size) =>
{
if (buffer == null || buffer.Length < size)
{
buffer = new byte[size];
}
Marshal.Copy(data, buffer, 0, size);
stream.Write(buffer, 0, size);
return(true);
});
return(version >= 10 ? FPDF_SaveWithVersion(document, fileWrite, flags, version) : FPDF_SaveAsCopy(document, fileWrite, flags));
}
public static bool FPDF_SaveWithVersion(IntPtr doc, Stream output, FPDF_SAVE_FLAGS flags, int fileVersion)
{
IntPtr streamPtr = Marshal.GetIUnknownForObject(output);
FPDF_FILEWRITE write = new FPDF_FILEWRITE
{
stream = streamPtr,
version = 1,
WriteBlock = Marshal.GetFunctionPointerForDelegate(_saveBlockDelegate)
};
bool result = false;
lock (LockString)
{
result = Imports.FPDF_SaveWithVersion(doc, write, flags, fileVersion);
}
Marshal.Release(streamPtr);
output.Flush();
return(result);
}
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);
}
}
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);
}
}
public static extern bool FPDF_SaveWithVersion(IntPtr doc,
[MarshalAs(UnmanagedType.LPStruct)] FPDF_FILEWRITE writer,
[MarshalAs(UnmanagedType.I4)] FPDF_SAVE_FLAGS flags,
int fileVersion);
public static extern bool FPDF_SaveAsCopy(IntPtr doc,
[MarshalAs(UnmanagedType.LPStruct)] FPDF_FILEWRITE writer,
[MarshalAs(UnmanagedType.I4)] FPDF_SAVE_FLAGS flag);
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 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);
}
}
