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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2019 Brian P. Hinz
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package com.tigervnc.rfb;
import com.tigervnc.rdr.*;
abstract public class Decoder {
public static class DecoderFlags {
// A constant for decoders that don't need anything special
public static int DecoderPlain = 0;
// All rects for this decoder must be handled in order
public static int DecoderOrdered = 1 << 0;
// Only some of the rects must be handled in order,
// see doesRectsConflict()
public static int DecoderPartiallyOrdered = 1 << 1;
};
public Decoder(int flags)
{
this.flags = flags;
}
abstract public void readRect(Rect r, InStream is,
ServerParams server, OutStream os);
abstract public void decodeRect(Rect r, Object buffer,
int buflen, ServerParams server,
ModifiablePixelBuffer pb);
public void getAffectedRegion(Rect rect, Object buffer,
int buflen, ServerParams server,
Region region)
{
region.reset(rect);
}
public boolean doRectsConflict(Rect rectA, Object bufferA,
int buflenA, Rect rectB,
Object bufferB, int buflenB,
ServerParams server)
{
return false;
}
static public boolean supported(int encoding)
{
switch(encoding) {
case Encodings.encodingRaw:
case Encodings.encodingCopyRect:
case Encodings.encodingRRE:
case Encodings.encodingHextile:
case Encodings.encodingZRLE:
case Encodings.encodingTight:
return true;
default:
return false;
}
}
static public Decoder createDecoder(int encoding) {
switch(encoding) {
case Encodings.encodingRaw:
return new RawDecoder();
case Encodings.encodingCopyRect:
return new CopyRectDecoder();
case Encodings.encodingRRE:
return new RREDecoder();
case Encodings.encodingHextile:
return new HextileDecoder();
case Encodings.encodingZRLE:
return new ZRLEDecoder();
case Encodings.encodingTight:
return new TightDecoder();
default:
return null;
}
}
public final int flags;
}
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