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/* Copyright (C) 2002-2005 RealVNC Ltd. 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.
*/
#ifndef __RFB_ZRLEENCODER_H__
#define __RFB_ZRLEENCODER_H__
#include <rdr/MemOutStream.h>
#include <rdr/ZlibOutStream.h>
#include <rfb/Encoder.h>
namespace rfb {
class ZRLEEncoder : public Encoder {
public:
static Encoder* create(SMsgWriter* writer);
virtual bool writeRect(const Rect& r, TransImageGetter* ig, Rect* actual);
virtual ~ZRLEEncoder();
// setMaxLen() sets the maximum size in bytes of any ZRLE rectangle. This
// can be used to stop the MemOutStream from growing too large. The value
// must be large enough to allow for at least one row of ZRLE tiles. So
// for example for a screen width of 2048 32-bit pixels this is 2K*4*64 =
// 512Kbytes plus a bit of overhead (the overhead is about 1/16 of the
// width, in this example about 128 bytes).
static void setMaxLen(int m) { maxLen = m; }
// setSharedMos() sets a MemOutStream to be shared amongst all
// ZRLEEncoders. Should be called before any ZRLEEncoders are created.
static void setSharedMos(rdr::MemOutStream* mos_) { sharedMos = mos_; }
private:
ZRLEEncoder(SMsgWriter* writer);
SMsgWriter* writer;
rdr::ZlibOutStream zos;
rdr::MemOutStream* mos;
static rdr::MemOutStream* sharedMos;
static int maxLen;
};
}
#endif
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