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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.
*/
package com.tigervnc.rfb;
import com.tigervnc.rdr.*;
public class HextileDecoder extends Decoder {
public HextileDecoder(CMsgReader reader_) { reader = reader_; }
public void readRect(Rect r, CMsgHandler handler) {
InStream is = reader.getInStream();
int bytesPerPixel = handler.cp.pf().bpp / 8;
boolean bigEndian = handler.cp.pf().bigEndian;
int[] buf = reader.getImageBuf(16 * 16 * 4);
Rect t = new Rect();
int bg = 0;
int fg = 0;
for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
t.br.y = Math.min(r.br.y, t.tl.y + 16);
for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
t.br.x = Math.min(r.br.x, t.tl.x + 16);
int tileType = is.readU8();
if ((tileType & Hextile.raw) != 0) {
is.readPixels(buf, t.area(), bytesPerPixel, bigEndian);
handler.imageRect(t, buf);
continue;
}
if ((tileType & Hextile.bgSpecified) != 0)
bg = is.readPixel(bytesPerPixel, bigEndian);
int len = t.area();
int ptr = 0;
while (len-- > 0) buf[ptr++] = bg;
if ((tileType & Hextile.fgSpecified) != 0)
fg = is.readPixel(bytesPerPixel, bigEndian);
if ((tileType & Hextile.anySubrects) != 0) {
int nSubrects = is.readU8();
for (int i = 0; i < nSubrects; i++) {
if ((tileType & Hextile.subrectsColoured) != 0)
fg = is.readPixel(bytesPerPixel, bigEndian);
int xy = is.readU8();
int wh = is.readU8();
/*
Rect s = new Rect();
s.tl.x = t.tl.x + ((xy >> 4) & 15);
s.tl.y = t.tl.y + (xy & 15);
s.br.x = s.tl.x + ((wh >> 4) & 15) + 1;
s.br.y = s.tl.y + (wh & 15) + 1;
*/
int x = ((xy >> 4) & 15);
int y = (xy & 15);
int w = ((wh >> 4) & 15) + 1;
int h = (wh & 15) + 1;
ptr = y * t.width() + x;
int rowAdd = t.width() - w;
while (h-- > 0) {
len = w;
while (len-- > 0) buf[ptr++] = fg;
ptr += rowAdd;
}
}
}
handler.imageRect(t, buf);
}
}
}
CMsgReader reader;
}
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