1 files changed, 85 insertions, 0 deletions
diff --git a/frontend/pisa_gamma_correction.h b/frontend/pisa_gamma_correction.h
new file mode 100644
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+++ b/frontend/pisa_gamma_correction.h
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+/* 
+   SANE EPSON backend
+   Copyright (C) 2001 SEIKO EPSON CORPORATION
+
+   Date         Author      Reason
+   06/01/2001   N.Sasaki    New
+
+   This file is part of the `iscan' program.
+
+   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+   As a special exception, the copyright holders give permission
+   to link the code of this program with the esmod library and
+   distribute linked combinations including the two.  You must obey
+   the GNU General Public License in all respects for all of the
+   code used other then esmod.
+*/
+
+#ifndef ___PISA_GAMMA_CORRECTION_H
+#define ___PISA_GAMMA_CORRECTION_H
+
+#include <gtk/gtk.h>
+#include "pisa_enums.h"
+
+#define GAMMA_WIDTH	192
+#define GAMMA_HEIGHT	192
+
+class gamma_correction
+{
+ public:
+
+  // operation
+  int	init ( void );
+  GtkWidget *	create_controls ( GtkWidget * parent );
+  int	close_window ( int destroy );
+  void	sensitive ( int is_prev_img );
+
+  void	change_page ( int page );
+  void	reset ( int all );
+  gint	event ( GtkWidget * widget, GdkEvent * event );
+
+ private:
+
+  typedef double matrix [ 4 ] [ 4 ];
+
+  // operation
+  GtkWidget	* create_gamma_notebook ( GtkWidget * parent );
+  GtkWidget	* create_gamma_curve ( int i );
+  GtkWidget	* create_reset_button ( void );
+
+  void	reset_points ( int i );
+  void	update_gamma ( void );
+  void	calculate_curve ( void );
+  void	plot_curve ( int p1, int p2, int p3, int p4 );
+  void	compose_curve ( matrix a, matrix b, matrix ab );
+
+  // attribute
+  int		m_page;
+  GtkWidget	* m_widget [ WG_GAMMA_NUM ];
+  GtkWidget	* m_drawarea [ 4 ];
+  GdkPixmap	* m_pixmap [ 4 ];
+
+  int		m_leftmost, m_rightmost;
+  int		m_points [ 4 ] [ 17 ] [ 2 ];
+  unsigned char	m_curve[ 4 ] [ GAMMA_WIDTH ];
+  int		m_grabpoint;
+  matrix	m_basis;
+  int		m_active [ 4 ];
+
+  GdkCursor	* m_cursor [ 3 ];
+};
+
+#endif // ___PISA_GAMMA_CORRECTION_H