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diff --git a/backend/sm3840_params.h b/backend/sm3840_params.h
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+/* sane - Scanner Access Now Easy.
+
+   ScanMaker 3840 Backend
+   Copyright (C) 2005-7 Earle F. Philhower, III
+   earle@ziplabel.com - http://www.ziplabel.com
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+
+   As a special exception, the authors of SANE give permission for
+   additional uses of the libraries contained in this release of SANE.
+
+   The exception is that, if you link a SANE library with other files
+   to produce an executable, this does not by itself cause the
+   resulting executable to be covered by the GNU General Public
+   License.  Your use of that executable is in no way restricted on
+   account of linking the SANE library code into it.
+
+   This exception does not, however, invalidate any other reasons why
+   the executable file might be covered by the GNU General Public
+   License.
+
+   If you submit changes to SANE to the maintainers to be included in
+   a subsequent release, you agree by submitting the changes that
+   those changes may be distributed with this exception intact.
+
+   If you write modifications of your own for SANE, it is your choice
+   whether to permit this exception to apply to your modifications.
+   If you do not wish that, delete this exception notice.
+
+*/
+
+#ifndef _SM3840_Params
+#define _SM3840_Params
+typedef struct SM3840_Params
+{
+  int gray;			/* 0, 1 */
+  int halftone;			/* 0, 1 (also set gray=1) */
+  int lineart;			/* 0, 1 (also set gray=1) */
+
+  int dpi;			/* 150, 300, 600, 1200 */
+  int bpp;			/* 8, 16 */
+
+  double gain;			/* 0.01...9.9 */
+  int offset;			/* 0..4095 */
+
+  int lamp;			/* 1..15 mins */
+
+  int threshold;		/* 0...255 luminosity */
+
+  /* Input to configure(), in inches */
+  double top, left;
+  double width, height;
+
+  /* Output from configure(), in pixels */
+  int topline;
+  int scanlines;
+  int leftpix;
+  int scanpix;
+  int linelen;			/* bytes per line */
+} SM3840_Params;
+#endif