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diff --git a/public/fpdf_save.h b/public/fpdf_save.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+ 
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef _FPDFSAVE_H_
+#define _FPDFSAVE_H_
+
+#include "fpdfview.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+// Structure for custom file write
+struct FPDF_FILEWRITE{
+
+	//
+	//Version number of the interface. Currently must be 1.
+	//
+	int version;
+
+	// 
+	// Method: WriteBlock
+	//			Output a block of data in your custom way.
+	// Interface Version:
+	//			1
+	// Implementation Required:
+	//			Yes
+	// Comments:
+	//			Called by function FPDF_SaveDocument
+	// Parameters:
+	//			pThis		-	Pointer to the structure itself
+	//			pData		-	Pointer to a buffer to output
+	//			size		-	The size of the buffer.
+	// Return value:
+	//			Should be non-zero if successful, zero for error.
+	//
+	int		(*WriteBlock)( FPDF_FILEWRITE* pThis, const void* pData, unsigned long size);
+
+};
+
+
+/** @brief Incremental. */
+#define FPDF_INCREMENTAL		1
+/** @brief No Incremental. */
+#define FPDF_NO_INCREMENTAL		2
+/** @brief Remove security. */
+#define FPDF_REMOVE_SECURITY	3
+
+// Function: FPDF_SaveAsCopy
+//			Saves the copy of specified document in custom way.
+// Parameters:	
+//			document		-	Handle to document. Returned by FPDF_LoadDocument and FPDF_CreateNewDocument.
+//			pFileWrite		-	A pointer to a custom file write structure.
+//			flags			-	The creating flags.
+// Return value:
+//			TRUE for succeed, FALSE for failed.
+//
+DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveAsCopy(	FPDF_DOCUMENT document,FPDF_FILEWRITE * pFileWrite,
+												FPDF_DWORD flags );
+
+// Function: FPDF_SaveWithVersion
+//			Same as function ::FPDF_SaveAsCopy, except the file version of the saved document could be specified by user.
+// Parameters:	
+//			document		-	Handle to document.
+//			pFileWrite		-	A pointer to a custom file write structure.
+//			flags			-	The creating flags.
+//			fileVersion		-	The PDF file version. File version: 14 for 1.4, 15 for 1.5, ...
+// Return value:
+//			TRUE if succeed, FALSE if failed.
+//
+DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveWithVersion(FPDF_DOCUMENT document,FPDF_FILEWRITE * pFileWrite,
+	FPDF_DWORD flags, int fileVersion);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif //_FPDFSAVE_H_