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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/ImageGetter.h>
#include <rfb/encodings.h>
#include <rfb/ConnParams.h>
#include <rfb/SMsgWriter.h>
#include <rfb/ZRLEEncoder.h>
#include <rfb/Configuration.h>
using namespace rfb;
rdr::MemOutStream* ZRLEEncoder::sharedMos = 0;
int ZRLEEncoder::maxLen = 4097 * 1024; // enough for width 16384 32-bit pixels
IntParameter zlibLevel("ZlibLevel","Zlib compression level",-1);
#define EXTRA_ARGS ImageGetter* ig
#define GET_IMAGE_INTO_BUF(r,buf) ig->getImage(buf, r);
#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
Encoder* ZRLEEncoder::create(SMsgWriter* writer)
{
return new ZRLEEncoder(writer);
}
ZRLEEncoder::ZRLEEncoder(SMsgWriter* writer_)
: writer(writer_), zos(0,0,zlibLevel)
{
if (sharedMos)
mos = sharedMos;
else
mos = new rdr::MemOutStream(129*1024);
}
ZRLEEncoder::~ZRLEEncoder()
{
if (!sharedMos)
delete mos;
}
bool ZRLEEncoder::writeRect(const Rect& r, TransImageGetter* ig, Rect* actual)
{
rdr::U8* imageBuf = writer->getImageBuf(64 * 64 * 4 + 4);
mos->clear();
bool wroteAll = true;
*actual = r;
switch (writer->bpp()) {
case 8:
wroteAll = zrleEncode8(r, mos, &zos, imageBuf, maxLen, actual, ig);
break;
case 16:
wroteAll = zrleEncode16(r, mos, &zos, imageBuf, maxLen, actual, ig);
break;
case 32:
{
const PixelFormat& pf = writer->getConnParams()->pf();
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()))
{
wroteAll = zrleEncode24A(r, mos, &zos, imageBuf, maxLen, actual, ig);
}
else if ((fitsInLS3Bytes && pf.isBigEndian()) ||
(fitsInMS3Bytes && pf.isLittleEndian()))
{
wroteAll = zrleEncode24B(r, mos, &zos, imageBuf, maxLen, actual, ig);
}
else
{
wroteAll = zrleEncode32(r, mos, &zos, imageBuf, maxLen, actual, ig);
}
break;
}
}
writer->startRect(*actual, encodingZRLE);
rdr::OutStream* os = writer->getOutStream();
os->writeU32(mos->length());
os->writeBytes(mos->data(), mos->length());
writer->endRect();
return wroteAll;
}
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