Mercurial > hg > Applications > tvnjviewer

comparison src/main/java/com/glavsoft/rfb/encoding/decoder/RichCursorDecoder.java @ 0:daa24f8a557b

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TightVNC original
author YU
date Thu, 11 Sep 2014 07:30:03 +0900
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children ba82199e3b70
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-1:000000000000 0:daa24f8a557b
1 // Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC.
2 // All rights reserved.
3 //
4 //-------------------------------------------------------------------------
5 // This file is part of the TightVNC software. Please visit our Web site:
6 //
7 // http://www.tightvnc.com/
8 //
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 2 of the License, or
12 // (at your option) any later version.
13 //
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
18 //
19 // You should have received a copy of the GNU General Public License along
20 // with this program; if not, write to the Free Software Foundation, Inc.,
21 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 //-------------------------------------------------------------------------
23 //
24
25 package com.glavsoft.rfb.encoding.decoder;
26
27 import com.glavsoft.drawing.Renderer;
28 import com.glavsoft.exceptions.TransportException;
29 import com.glavsoft.transport.Reader;
30
31 /**
32 * Decoder for RichCursor pseudo encoding
33 */
34 public class RichCursorDecoder extends Decoder {
35 private static RichCursorDecoder instance = new RichCursorDecoder();
36
37 private RichCursorDecoder() { /*empty*/ }
38
39 public static RichCursorDecoder getInstance() {
40 return instance;
41 }
42
43 @Override
44 public void decode(Reader reader, Renderer renderer,
45 FramebufferUpdateRectangle rect) throws TransportException {
46 int bytesPerPixel = renderer.getBytesPerPixel();
47 int length = rect.width * rect.height * bytesPerPixel;
48 if (0 == length)
49 return;
50 byte[] buffer = ByteBuffer.getInstance().getBuffer(length);
51 reader.readBytes(buffer, 0, length);
52
53 StringBuilder sb = new StringBuilder(" ");
54 for (int i=0; i<length; ++i) {
55 sb.append(Integer.toHexString(buffer[i]&0xff)).append(" ");
56 }
57 int scanLine = (int) Math.floor((rect.width + 7) / 8);
58 byte[] bitmask = new byte[scanLine * rect.height];
59 reader.readBytes(bitmask, 0, bitmask.length);
60
61 sb = new StringBuilder(" ");
62 for (int i=0; i<bitmask.length; ++i) {
63 sb.append(Integer.toHexString(bitmask[i]&0xff)).append(" ");
64 }
65 int[] cursorPixels = new int[rect.width * rect.height];
66 for (int y = 0; y < rect.height; ++y) {
67 for (int x = 0; x < rect.width; ++x) {
68 int offset = y * rect.width + x;
69 cursorPixels[offset] = isBitSet(bitmask[y * scanLine + x / 8], x % 8) ?
70 0xFF000000 | renderer.getPixelColor(buffer, offset * bytesPerPixel) :
71 0; // transparent
72 }
73 }
74 renderer.createCursor(cursorPixels, rect);
75 }
76
77 private boolean isBitSet(byte aByte, int index) {
78 return (aByte & 1 << 7 - index) > 0;
79 }
80
81 }