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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.
*/
//
// CMsgReader - class for reading RFB messages on the client side
// (i.e. messages from server to client).
//
package com.tigervnc.rfb;
import com.tigervnc.rdr.*;
abstract public class CMsgReader {
protected CMsgReader(CMsgHandler handler_, InStream is_)
{
imageBufIdealSize = 0;
handler = handler_;
is = is_;
imageBuf = null;
imageBufSize = 0;
decoders = new Decoder[Encodings.encodingMax+1];
}
protected void readSetColourMapEntries()
{
is.skip(1);
int firstColour = is.readU16();
int nColours = is.readU16();
int[] rgbs = new int[nColours * 3];
for (int i = 0; i < nColours * 3; i++)
rgbs[i] = is.readU16();
handler.setColourMapEntries(firstColour, nColours, rgbs);
}
protected void readBell()
{
handler.bell();
}
protected void readServerCutText()
{
is.skip(3);
int len = is.readU32();
if (len > 256*1024) {
is.skip(len);
vlog.error("cut text too long ("+len+" bytes) - ignoring");
return;
}
byte[] buf = new byte[len];
is.readBytes(buf, 0, len);
String str = new String();
try {
str = new String(buf,"UTF8");
} catch(java.io.UnsupportedEncodingException e) {
e.printStackTrace();
}
handler.serverCutText(str, len);
}
protected void readFramebufferUpdateStart()
{
handler.framebufferUpdateStart();
}
protected void readFramebufferUpdateEnd()
{
handler.framebufferUpdateEnd();
}
protected void readRect(Rect r, int encoding)
{
if ((r.br.x > handler.cp.width) || (r.br.y > handler.cp.height)) {
vlog.error("Rect too big: "+r.width()+"x"+r.height()+" at "+
r.tl.x+","+r.tl.y+" exceeds "+handler.cp.width+"x"+
handler.cp.height);
throw new Exception("Rect too big");
}
if (r.is_empty())
vlog.error("Ignoring zero size rect");
handler.beginRect(r, encoding);
if (encoding == Encodings.encodingCopyRect) {
readCopyRect(r);
} else {
if (decoders[encoding] == null) {
decoders[encoding] = Decoder.createDecoder(encoding, this);
if (decoders[encoding] == null) {
vlog.error("Unknown rect encoding "+encoding);
throw new Exception("Unknown rect encoding");
}
}
decoders[encoding].readRect(r, handler);
}
handler.endRect(r, encoding);
}
protected void readCopyRect(Rect r)
{
int srcX = is.readU16();
int srcY = is.readU16();
handler.copyRect(r, srcX, srcY);
}
protected void readSetCursor(int width, int height, Point hotspot)
{
int data_len = width * height;
int mask_len = ((width+7)/8) * height;
int[] data = new int[data_len];
byte[] mask = new byte[mask_len];
is.readPixels(data, data_len, (handler.cp.pf().bpp/8), handler.cp.pf().bigEndian);
is.readBytes(mask, 0, mask_len);
handler.setCursor(width, height, hotspot, data, mask);
}
public int[] getImageBuf(int required) { return getImageBuf(required, 0, 0); }
public int[] getImageBuf(int required, int requested, int nPixels)
{
int requiredBytes = required;
int requestedBytes = requested;
int size = requestedBytes;
if (size > imageBufIdealSize) size = imageBufIdealSize;
if (size < requiredBytes)
size = requiredBytes;
if (imageBufSize < size) {
imageBufSize = size;
imageBuf = new int[imageBufSize];
}
if (nPixels != 0)
nPixels = imageBufSize / (handler.cp.pf().bpp / 8);
return imageBuf;
}
public final int bpp()
{
return handler.cp.pf().bpp;
}
abstract public void readServerInit();
// readMsg() reads a message, calling the handler as appropriate.
abstract public void readMsg();
public InStream getInStream() { return is; }
public int imageBufIdealSize;
protected CMsgHandler handler;
protected InStream is;
protected Decoder[] decoders;
protected int[] imageBuf;
protected int imageBufSize;
static LogWriter vlog = new LogWriter("CMsgReader");
}
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