109 lines
3.1 KiB
Java
109 lines
3.1 KiB
Java
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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* Copyright 2016-2019 Brian P. Hinz
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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package com.tigervnc.rfb;
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import java.nio.*;
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import com.tigervnc.rdr.*;
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public class RREDecoder extends Decoder {
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public RREDecoder() { super(DecoderFlags.DecoderPlain); }
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public void readRect(Rect r, InStream is,
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ServerParams server, OutStream os)
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{
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int numRects;
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numRects = is.readU32();
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os.writeU32(numRects);
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os.copyBytes(is, server.pf().bpp/8 + numRects * (server.pf().bpp/8 + 8));
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}
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public void decodeRect(Rect r, Object buffer,
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int buflen, ServerParams server,
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ModifiablePixelBuffer pb)
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{
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MemInStream is = new MemInStream((byte[])buffer, 0, buflen);
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PixelFormat pf = server.pf();
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switch (pf.bpp) {
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case 8: rreDecode8 (r, is, pf, pb); break;
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case 16: rreDecode16(r, is, pf, pb); break;
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case 32: rreDecode32(r, is, pf, pb); break;
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}
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}
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private static ByteBuffer READ_PIXEL(InStream is, PixelFormat pf) {
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ByteBuffer b = ByteBuffer.allocate(4);
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switch (pf.bpp) {
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case 8:
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b.putInt(is.readOpaque8());
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return ByteBuffer.allocate(1).put(b.get(3));
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case 16:
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b.putInt(is.readOpaque16());
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return ByteBuffer.allocate(2).put(b.array(), 2, 2);
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case 32:
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default:
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b.putInt(is.readOpaque32());
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return b;
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}
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}
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private void RRE_DECODE(Rect r, InStream is,
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PixelFormat pf, ModifiablePixelBuffer pb)
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{
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int nSubrects = is.readU32();
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byte[] bg = READ_PIXEL(is, pf).array();
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pb.fillRect(pf, r, bg);
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for (int i = 0; i < nSubrects; i++) {
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byte[] pix = READ_PIXEL(is, pf).array();
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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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pb.fillRect(pf, new 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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private void rreDecode8(Rect r, InStream is,
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PixelFormat pf,
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ModifiablePixelBuffer pb)
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{
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RRE_DECODE(r, is, pf, pb);
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}
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private void rreDecode16(Rect r, InStream is,
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PixelFormat pf,
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ModifiablePixelBuffer pb)
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{
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RRE_DECODE(r, is, pf, pb);
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}
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private void rreDecode32(Rect r, InStream is,
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PixelFormat pf,
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ModifiablePixelBuffer pb)
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{
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RRE_DECODE(r, is, pf, pb);
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}
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}
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