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- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright (C) 2011 D. R. Commander. All Rights Reserved.
- *
- * This 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.
- *
- * This software 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 this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- //
- // ZlibOutStream streams to a compressed data stream (underlying), compressing
- // with zlib on the fly.
- //
-
- #ifndef __RDR_ZLIBOUTSTREAM_H__
- #define __RDR_ZLIBOUTSTREAM_H__
-
- #include <rdr/OutStream.h>
-
- struct z_stream_s;
-
- namespace rdr {
-
- class ZlibOutStream : public OutStream {
-
- public:
-
- ZlibOutStream(OutStream* os=0, int compressionLevel=-1);
- virtual ~ZlibOutStream();
-
- void setUnderlying(OutStream* os);
- void setCompressionLevel(int level=-1);
- void flush();
- size_t length();
- virtual void cork(bool enable);
-
- private:
-
- virtual void overrun(size_t needed);
- void deflate(int flush);
- void checkCompressionLevel();
-
- OutStream* underlying;
- int compressionLevel;
- int newLevel;
- size_t bufSize;
- size_t offset;
- z_stream_s* zs;
- U8* start;
- };
-
- } // end of namespace rdr
-
- #endif
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