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// imgstream.hh -- provides an interface to write multiple images
// Copyright (C) 2008 SEIKO EPSON CORPORATION
//
// This file is part of the 'iscan' program.
//
// The 'iscan' program is free-ish 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 FITNESS
// FOR A PARTICULAR PURPOSE or MERCHANTABILITY.
// See the GNU General Public License for more details.
//
// You should have received a verbatim copy of the GNU General Public
// License along with this program; if not, write to:
//
// Free Software Foundation, Inc.
// 59 Temple Place, Suite 330
// Boston, MA 02111-1307 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 than esmod.
#ifndef iscan_imgstream_hh_included
#define iscan_imgstream_hh_included
#ifndef __cplusplus
#error "This is a C++ header file; use a C++ compiler to compile it."
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "basic-imgstream.hh"
#include "file-opener.hh"
namespace iscan
{
enum file_format
{
PCX,
PNM,
PNG,
JPG, JPEG = JPG,
PDF,
TIF, // libtiff uses TIFF as a type already!
NO_FORMAT,
};
class imgstream : public basic_imgstream
{
public:
typedef basic_imgstream::byte_type byte_type;
typedef basic_imgstream::size_type size_type;
imgstream (file_opener& opener, file_format format,
bool match_direction = false);
virtual ~imgstream (void);
virtual imgstream& write (const byte_type *data, size_type n);
virtual imgstream& flush (void);
virtual void next (void);
static bool is_usable (void);
protected:
imgstream (void);
bool is_back (unsigned long); // indicates whether a page is the
// back page of a duplex scan
unsigned long _page;
bool _match_direction; // when true, match front and back
// orientation for duplex scans
private:
basic_imgstream * create_stream (void);
file_opener* _opener;
file_format _format;
basic_imgstream *_stream;
bool _configured;
};
imgstream *
create_imgstream (file_opener& opener, file_format format,
bool match_direction = false);
} // namespace iscan
#endif /* iscan_imgstream_hh_included */
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