mirror of
https://github.com/kasmtech/KasmVNC.git
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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// RRE decoding function.
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//
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// This file is #included after having set the following macro:
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// BPP - 8, 16 or 32
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#include <rdr/InStream.h>
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#include <rfb/Exception.h>
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namespace rfb {
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// CONCAT2E concatenates its arguments, expanding them if they are macros
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#ifndef CONCAT2E
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#define CONCAT2(a,b) a##b
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#define CONCAT2E(a,b) CONCAT2(a,b)
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#endif
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#define PIXEL_T rdr::CONCAT2E(U,BPP)
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#define READ_PIXEL CONCAT2E(readOpaque,BPP)
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#define RRE_DECODE CONCAT2E(rreDecode,BPP)
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void RRE_DECODE (const Rect& r, rdr::InStream* is,
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const PixelFormat& pf, ModifiablePixelBuffer* pb)
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{
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int nSubrects = is->readU32();
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PIXEL_T bg = is->READ_PIXEL();
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pb->fillRect(pf, r, &bg);
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for (int i = 0; i < nSubrects; i++) {
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PIXEL_T pix = is->READ_PIXEL();
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int x = is->readU16();
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int y = is->readU16();
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int w = is->readU16();
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int h = is->readU16();
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if (((x+w) > r.width()) || ((y+h) > r.height()))
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throw Exception ("RRE decode error");
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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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}
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}
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#undef PIXEL_T
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#undef READ_PIXEL
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#undef RRE_DECODE
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}
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