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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.
*/
#include <rdr/OutStream.h>
#include <rfb/Exception.h>
#include <rfb/encodings.h>
#include <rfb/ConnParams.h>
#include <rfb/SMsgWriter.h>
#include <rfb/SConnection.h>
#include <rfb/ZRLEEncoder.h>
#include <rfb/Configuration.h>
using namespace rfb;
IntParameter zlibLevel("ZlibLevel","Zlib compression level",-1);
static inline void writeOpaque24A(rdr::OutStream* os, rdr::U32 u)
{
os->check(3);
os->writeU8(((rdr::U8*)&u)[0]);
os->writeU8(((rdr::U8*)&u)[1]);
os->writeU8(((rdr::U8*)&u)[2]);
}
static inline void writeOpaque24B(rdr::OutStream* os, rdr::U32 u)
{
os->check(3);
os->writeU8(((rdr::U8*)&u)[1]);
os->writeU8(((rdr::U8*)&u)[2]);
os->writeU8(((rdr::U8*)&u)[3]);
}
#define BPP 8
#include <rfb/zrleEncode.h>
#undef BPP
#define BPP 16
#include <rfb/zrleEncode.h>
#undef BPP
#define BPP 32
#include <rfb/zrleEncode.h>
#define CPIXEL 24A
#include <rfb/zrleEncode.h>
#undef CPIXEL
#define CPIXEL 24B
#include <rfb/zrleEncode.h>
#undef CPIXEL
#undef BPP
ZRLEEncoder::ZRLEEncoder(SConnection* conn)
: Encoder(conn), zos(0,0,zlibLevel), mos(129*1024)
{
}
ZRLEEncoder::~ZRLEEncoder()
{
}
void ZRLEEncoder::writeRect(const Rect& r, PixelBuffer* pb)
{
const PixelFormat& pf = conn->cp.pf();
rdr::U8* imageBuf = conn->writer()->getImageBuf(64 * 64 * 4 + 4);
mos.clear();
switch (pf.bpp) {
case 8:
zrleEncode8(r, &mos, &zos, imageBuf, pf, pb);
break;
case 16:
zrleEncode16(r, &mos, &zos, imageBuf, pf, pb);
break;
case 32:
{
Pixel maxPixel = pf.pixelFromRGB((rdr::U16)-1, (rdr::U16)-1, (rdr::U16)-1);
bool fitsInLS3Bytes = maxPixel < (1<<24);
bool fitsInMS3Bytes = (maxPixel & 0xff) == 0;
if ((fitsInLS3Bytes && pf.isLittleEndian()) ||
(fitsInMS3Bytes && pf.isBigEndian()))
{
zrleEncode24A(r, &mos, &zos, imageBuf, pf, pb);
}
else if ((fitsInLS3Bytes && pf.isBigEndian()) ||
(fitsInMS3Bytes && pf.isLittleEndian()))
{
zrleEncode24B(r, &mos, &zos, imageBuf, pf, pb);
}
else
{
zrleEncode32(r, &mos, &zos, imageBuf, pf, pb);
}
break;
}
}
conn->writer()->startRect(r, encodingZRLE);
rdr::OutStream* os = conn->getOutStream();
os->writeU32(mos.length());
os->writeBytes(mos.data(), mos.length());
conn->writer()->endRect();
}
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