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//------------------------------------------------------------------------
// Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
//
// This file is part of the ZBar Bar Code Reader.
//
// The ZBar Bar Code Reader is free software; you can redistribute it
// and/or modify it under the terms of the GNU Lesser Public License as
// published by the Free Software Foundation; either version 2.1 of
// the License, or (at your option) any later version.
//
// The ZBar Bar Code Reader 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 Lesser Public License for more details.
//
// You should have received a copy of the GNU Lesser Public License
// along with the ZBar Bar Code Reader; if not, write to the Free
// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
// Boston, MA 02110-1301 USA
//
// http://sourceforge.net/projects/zbar
//------------------------------------------------------------------------
#ifndef _ZBAR_SCANNER_H_
#define _ZBAR_SCANNER_H_
/// @file
/// Scanner C++ wrapper
#ifndef _ZBAR_H_
#error "include zbar.h in your application, **not** zbar/Scanner.h"
#endif
#include <stdio.h>
namespace zbar
{
/// low-level linear intensity sample stream scanner interface.
/// identifies "bar" edges and measures width between them.
/// optionally passes to bar width Decoder
class Scanner
{
public:
/// constructor.
/// @param decoder reference to a Decoder instance which will
/// be passed scan results automatically
Scanner(Decoder &decoder)
{
_scanner = zbar_scanner_create(decoder._decoder);
}
/// constructor.
/// @param decoder pointer to a Decoder instance which will
/// be passed scan results automatically
Scanner(Decoder *decoder = NULL)
{
zbar_decoder_t *zdcode = NULL;
if (decoder)
zdcode = decoder->_decoder;
_scanner = zbar_scanner_create(zdcode);
}
~Scanner()
{
zbar_scanner_destroy(_scanner);
}
/// clear all scanner state.
/// see zbar_scanner_reset()
void reset()
{
zbar_scanner_reset(_scanner);
}
/// mark start of a new scan pass.
/// see zbar_scanner_new_scan()
zbar_symbol_type_t new_scan()
{
_type = zbar_scanner_new_scan(_scanner);
return (_type);
}
/// flush scanner pipeline.
/// see zbar_scanner_flush()
zbar_symbol_type_t flush()
{
_type = zbar_scanner_flush(_scanner);
return (_type);
}
/// process next sample intensity value.
/// see zbar_scan_y()
zbar_symbol_type_t scan_y(int y)
{
_type = zbar_scan_y(_scanner, y);
return (_type);
}
/// process next sample intensity value.
/// see zbar_scan_y()
Scanner &operator<<(int y)
{
_type = zbar_scan_y(_scanner, y);
return (*this);
}
/// process next sample from RGB (or BGR) triple.
/// see zbar_scan_rgb24()
zbar_symbol_type_t scan_rgb24(unsigned char *rgb)
{
_type = zbar_scan_rgb24(_scanner, rgb);
return (_type);
}
/// process next sample from RGB (or BGR) triple.
/// see zbar_scan_rgb24()
Scanner &operator<<(unsigned char *rgb)
{
_type = zbar_scan_rgb24(_scanner, rgb);
return (*this);
}
/// retrieve last scanned width.
/// see zbar_scanner_get_width()
unsigned get_width() const
{
return (zbar_scanner_get_width(_scanner));
}
/// retrieve last scanned color.
/// see zbar_scanner_get_color()
zbar_color_t get_color() const
{
return (zbar_scanner_get_color(_scanner));
}
/// retrieve last scan result.
zbar_symbol_type_t get_type() const
{
return (_type);
}
/// cast to C scanner
operator zbar_scanner_t *() const
{
return (_scanner);
}
/// retrieve C scanner
const zbar_scanner_t *get_c_scanner() const
{
return (_scanner);
}
private:
zbar_scanner_t *_scanner;
zbar_symbol_type_t _type;
};
} // namespace zbar
#endif
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