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// pcxstream.hh -- image streams producing PCX files
// Copyright (C) 2011 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 then esmod.
#ifndef iscan_pcxstream_hh_included
#define iscan_pcxstream_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 <cstdio>
#include <string>
namespace iscan
{
using std::string;
class pcxstream : public basic_imgstream
{
public:
typedef basic_imgstream::byte_type byte_type;
typedef basic_imgstream::size_type size_type;
explicit pcxstream (FILE *fp, const string& name = string ());
virtual ~pcxstream (void);
virtual basic_imgstream& write (const byte_type *line, size_type n);
virtual basic_imgstream& flush (void);
static bool is_usable (void);
private:
basic_imgstream& write_header (void);
void write_color (const byte_type *line, size_type n);
void write_gray (const byte_type *line, size_type n);
void write_mono (const byte_type *line, size_type n);
void write_row (const byte_type *line, size_type n);
void write_bytes (const byte_type *bytes, size_type n);
void write_palette (void);
size_type compress_row (const byte_type *line,
const size_type n,
byte_type *compressed);
void check_consistency (void) const;
void set_value_le (const size_type value,
byte_type *array,
const size_type array_size);
FILE *_stream;
bool _header;
bool _footer;
byte_type _pcx_header [128];
size_type _bytesperline;
byte_type *_row_buf;
byte_type *_zbuf;
void (pcxstream::*pwrite) (const byte_type *line, size_type n);
};
} // namespace iscan
#endif /* !defined (iscan_pcxstream_hh_included) */
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