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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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