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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
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