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diff --git a/externals/gridflow/bundled/Base/GemPixImageSave.h b/externals/gridflow/bundled/Base/GemPixImageSave.h
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+++ b/externals/gridflow/bundled/Base/GemPixImageSave.h
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+/*-----------------------------------------------------------------
+LOG
+    GEM - Graphics Environment for Multimedia
+
+    Gempiximagesave.h
+       - code to save an image
+       - part of GEM
+
+    Copyright (c) 1997-1999 Mark Danks. mark@danks.org
+    Copyright (c) Günther Geiger. geiger@epy.co.at
+    Copyright (c) 2001-2002 IOhannes m zmoelnig. forum::für::umläute. IEM. zmoelnig@iem.kug.ac.at
+    For information on usage and redistribution, and for a DISCLAIMER OF ALL
+    WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
+
+-----------------------------------------------------------------*/
+ 
+#ifndef INCLUDE_GEMPIXIMAGESAVE_H_
+#define INCLUDE_GEMPIXIMAGESAVE_H_
+
+#include "Base/GemExportDef.h"
+
+struct imageStruct;
+
+// image2mem() reads an image file into memory
+//   and a pointer to an imageStruct
+//       NULL = failure
+// 
+//       format:
+//    	  returns either GL_LUMINANCE or GL_RGBA
+// 
+//   automatically allocates the memory for the user
+//
+// This can read TIFF, SGI, and JPG images
+//
+GEM_EXTERN extern int mem2image(imageStruct *image, const char *filename, const int type);
+
+
+#endif