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/* sane - Scanner Access Now Easy.
Copyright (C) 1997 David Mosberger-Tang
This file is part of the SANE package.
SANE 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.
SANE 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 sane; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef preview_h
#define preview_h
#include <sys/types.h>
#include "../include/sane/config.h"
#include <sane/sane.h>
typedef struct
{
GSGDialog *dialog; /* the dialog for this preview */
SANE_Value_Type surface_type;
SANE_Unit surface_unit;
float surface[4]; /* the corners of the scan surface (device coords) */
float aspect; /* the aspect ratio of the scan surface */
int saved_dpi_valid;
SANE_Word saved_dpi;
int saved_coord_valid[4];
SANE_Word saved_coord[4];
/* desired/user-selected preview-window size: */
int preview_width;
int preview_height;
u_char *preview_row;
int scanning;
time_t image_last_time_updated;
gint input_tag;
SANE_Parameters params;
int image_offset;
int image_x;
int image_y;
int image_width;
int image_height;
u_char *image_data; /* 3 * image_width * image_height bytes */
GdkGC *gc;
int selection_drag;
struct
{
int active;
int coord[4];
}
selection, previous_selection;
GtkWidget *top; /* top-level widget */
GtkWidget *hruler;
GtkWidget *vruler;
GtkWidget *viewport;
GtkWidget *window; /* the preview window */
GtkWidget *cancel; /* the cancel button */
GtkWidget *preview; /* the preview button */
}
Preview;
/* Create a new preview based on the info in DIALOG. */
extern Preview *preview_new (GSGDialog *dialog);
/* Some of the parameters may have changed---update the preview. */
extern void preview_update (Preview *p);
/* Acquire a preview image and display it. */
extern void preview_scan (Preview *p);
/* Destroy a preview. */
extern void preview_destroy (Preview *p);
#endif /* preview_h */
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