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