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annotate src/main/java/com/glavsoft/rfb/encoding/decoder/ZRLEDecoder.java @ 498:8d95d64c33bf

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add multicastPut
author oshiro
date Fri, 15 Feb 2019 20:11:47 +0900
parents 0f9b3de45fb2
children 5455c62a3775
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 import jp.ac.u_ryukyu.treevnc.TreeRFBProto;
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31
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32 public class ZRLEDecoder extends ZlibDecoder {
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33 private static final int MAX_TILE_SIZE = 64;
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34 private int[] decodedBitmap;
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35 private int[] palette;
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36
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37 @Override
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38 public void decode(Reader reader, Renderer renderer,
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39 FramebufferUpdateRectangle rect) throws TransportException {
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40 int zippedLength = (int) reader.readUInt32();
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41 if (0 == zippedLength) return;
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42 int length = rect.width * rect.height * renderer.getBytesPerPixel();
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43 byte[] bytes = unzip(reader, zippedLength, length, rect.getEncodingType());
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44 decode1(renderer, rect, bytes, zippedLength, null);
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45 }
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46
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47 public void decode1(Renderer renderer,
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48 FramebufferUpdateRectangle rect, byte[] bytes, int zippedLength, TreeRFBProto rfbProto) throws TransportException {
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49 int offset = zippedLength;
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50 int maxX = rect.x + rect.width;
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51 int maxY = rect.y + rect.height;
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52 int prevoffset = offset;
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53 System.out.println("decode1: "+rect);
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54 if (null == palette) {
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55 palette = new int [128];
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56 }
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57 if (null == decodedBitmap) {
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58 decodedBitmap = new int[MAX_TILE_SIZE * MAX_TILE_SIZE];
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59 }
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60 for (int tileY = rect.y; tileY < maxY; tileY += MAX_TILE_SIZE) {
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61 int tileHeight = Math.min(maxY - tileY, MAX_TILE_SIZE);
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62
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63 for (int tileX = rect.x; tileX < maxX; tileX += MAX_TILE_SIZE) {
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64 int tileWidth = Math.min(maxX - tileX, MAX_TILE_SIZE);
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65 int subencoding = bytes[offset++] & 0x0ff;
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66 if(subencoding!=0)
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67 System.out.println("----------------"+subencoding);
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68 // 128 -plain RLE, 130-255 - Palette RLE
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69 boolean isRle = (subencoding & 128) != 0;
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70 // 2 to 16 for raw packed palette data, 130 to 255 for Palette RLE (subencoding - 128)
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71 int paletteSize = subencoding & 127;
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72 offset += readPalette(bytes, offset, renderer, paletteSize);
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73 if (1 == subencoding) { // A solid tile consisting of a single colour
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74 renderer.fillRect(palette[0], tileX, tileY, tileWidth, tileHeight);
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75 continue;
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76 }
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77 if (isRle) {
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78 if (0 == paletteSize) { // subencoding == 128 (or paletteSize == 0) - Plain RLE
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79 offset += decodePlainRle(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight);
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80 } else {
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81 offset += decodePaletteRle(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight);
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82 }
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83 } else {
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84 if (0 == paletteSize) { // subencoding == 0 (or paletteSize == 0) - raw CPIXEL data
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85 offset += decodeRaw(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight);
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86 // System.out.println("offset:"+offset);
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87 } else {
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88 offset += decodePacked(bytes, offset, renderer, paletteSize, tileX, tileY, tileWidth, tileHeight);
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89 }
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90 }
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91 }
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92 rfbProto.multicastPut(byte, prevoffset, offset);
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93 prevoffset = offset;
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94 }
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95 }
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96
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97 private int decodePlainRle(byte[] bytes, int offset, Renderer renderer,
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98 int tileX, int tileY, int tileWidth, int tileHeight) {
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99 int bytesPerCPixel = renderer.getBytesPerCPixel();
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100 int decodedOffset = 0;
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101 int decodedEnd = tileWidth * tileHeight;
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102 int index = offset;
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103 while (decodedOffset < decodedEnd) {
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104 int color = renderer.getCompactPixelColor(bytes, index);
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105 index += bytesPerCPixel;
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106 int rlength = 1;
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107 do {
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108 rlength += bytes[index] & 0x0ff;
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109 } while ((bytes[index++] & 0x0ff) == 255);
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110 assert rlength <= decodedEnd - decodedOffset;
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111 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, rlength, color);
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112 decodedOffset += rlength;
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113 }
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114 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight);
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115 return index - offset;
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116 }
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117
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118 private int decodePaletteRle(byte[] bytes, int offset, Renderer renderer,
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119 int tileX, int tileY, int tileWidth, int tileHeight) {
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120 int decodedOffset = 0;
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121 int decodedEnd = tileWidth * tileHeight;
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122 int index = offset;
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123 while (decodedOffset < decodedEnd) {
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124 int colorIndex = bytes[index++];
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125 int color = palette[colorIndex & 127];
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126 int rlength = 1;
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127 if ((colorIndex & 128) != 0) {
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128 do {
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129 rlength += bytes[index] & 0x0ff;
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130 } while (bytes[index++] == (byte) 255);
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131 }
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132 assert rlength <= decodedEnd - decodedOffset;
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133 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, rlength, color);
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134 decodedOffset += rlength;
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135 }
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136 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight);
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137 return index - offset;
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138 }
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139
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140 private int decodePacked(byte[] bytes, int offset, Renderer renderer,
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141 int paletteSize, int tileX, int tileY, int tileWidth, int tileHeight) {
0
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142 int bitsPerPalletedPixel = paletteSize > 16 ? 8 : paletteSize > 4 ? 4
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143 : paletteSize > 2 ? 2 : 1;
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144 int packedOffset = offset;
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145 int decodedOffset = 0;
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146 for (int i = 0; i < tileHeight; ++i) {
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147 int decodedRowEnd = decodedOffset + tileWidth;
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148 int byteProcessed = 0;
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149 int bitsRemain = 0;
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150
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151 while (decodedOffset < decodedRowEnd) {
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152 if (bitsRemain == 0) {
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153 byteProcessed = bytes[packedOffset++];
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154 bitsRemain = 8;
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155 }
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156 bitsRemain -= bitsPerPalletedPixel;
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157 int index = byteProcessed >> bitsRemain & (1 << bitsPerPalletedPixel) - 1 & 127;
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158 int color = palette[index];
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159 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, 1, color);
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160 ++decodedOffset;
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161 }
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162 }
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163 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight);
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164 return packedOffset - offset;
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165 }
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166
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167 private int decodeRaw(byte[] bytes, int offset, Renderer renderer,
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168 int tileX, int tileY, int tileWidth, int tileHeight) throws TransportException {
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169 return renderer.drawCompactBytes(bytes, offset, tileX, tileY, tileWidth, tileHeight);
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170 }
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171
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172 private int readPalette(byte[] bytes, int offset, Renderer renderer, int paletteSize) {
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173 final int bytesPerCPixel = renderer.getBytesPerCPixel();
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174 for (int i=0; i<paletteSize; ++i) {
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175 palette[i] = renderer.getCompactPixelColor(bytes, offset + i* bytesPerCPixel);
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176 }
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177 return paletteSize * bytesPerCPixel;
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178 }
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179
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180 }