- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright 2014-2022 Pierre Ossman for Cendio AB
- *
- * 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.
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <rdr/InStream.h>
- #include <rdr/MemInStream.h>
- #include <rdr/OutStream.h>
-
- #include <rfb/Exception.h>
- #include <rfb/ServerParams.h>
- #include <rfb/PixelBuffer.h>
- #include <rfb/RREDecoder.h>
-
- using namespace rfb;
-
- RREDecoder::RREDecoder() : Decoder(DecoderPlain)
- {
- }
-
- RREDecoder::~RREDecoder()
- {
- }
-
- bool RREDecoder::readRect(const Rect& /*r*/, rdr::InStream* is,
- const ServerParams& server, rdr::OutStream* os)
- {
- uint32_t numRects;
- size_t len;
-
- if (!is->hasData(4))
- return false;
-
- is->setRestorePoint();
-
- numRects = is->readU32();
- os->writeU32(numRects);
-
- len = server.pf().bpp/8 + numRects * (server.pf().bpp/8 + 8);
-
- if (!is->hasDataOrRestore(len))
- return false;
-
- is->clearRestorePoint();
-
- os->copyBytes(is, len);
-
- return true;
- }
-
- void RREDecoder::decodeRect(const Rect& r, const uint8_t* buffer,
- size_t buflen, const ServerParams& server,
- ModifiablePixelBuffer* pb)
- {
- rdr::MemInStream is(buffer, buflen);
- const PixelFormat& pf = server.pf();
- switch (pf.bpp) {
- case 8: rreDecode<uint8_t >(r, &is, pf, pb); break;
- case 16: rreDecode<uint16_t>(r, &is, pf, pb); break;
- case 32: rreDecode<uint32_t>(r, &is, pf, pb); break;
- }
- }
-
- template<class T>
- inline T RREDecoder::readPixel(rdr::InStream* is)
- {
- if (sizeof(T) == 1)
- return is->readOpaque8();
- if (sizeof(T) == 2)
- return is->readOpaque16();
- if (sizeof(T) == 4)
- return is->readOpaque32();
- }
-
- template<class T>
- void RREDecoder::rreDecode(const Rect& r, rdr::InStream* is,
- const PixelFormat& pf,
- ModifiablePixelBuffer* pb)
- {
- int nSubrects = is->readU32();
- T bg = readPixel<T>(is);
- pb->fillRect(pf, r, &bg);
-
- for (int i = 0; i < nSubrects; i++) {
- T pix = readPixel<T>(is);
- int x = is->readU16();
- int y = is->readU16();
- int w = is->readU16();
- int h = is->readU16();
-
- if (((x+w) > r.width()) || ((y+h) > r.height()))
- throw Exception ("RRE decode error");
-
- pb->fillRect(pf, Rect(r.tl.x+x, r.tl.y+y, r.tl.x+x+w, r.tl.y+y+h), &pix);
- }
- }
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