1 files changed, 100 insertions, 0 deletions
diff --git a/lib/imgstream.hh b/lib/imgstream.hh
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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 */