001 package net.minecraft.network.packet; 002 003 import cpw.mods.fml.relauncher.Side; 004 import cpw.mods.fml.relauncher.SideOnly; 005 import java.io.DataInputStream; 006 import java.io.DataOutputStream; 007 import java.io.IOException; 008 import java.util.List; 009 import java.util.concurrent.Semaphore; 010 import java.util.zip.DataFormatException; 011 import java.util.zip.Deflater; 012 import java.util.zip.Inflater; 013 import net.minecraft.world.chunk.Chunk; 014 015 public class Packet56MapChunks extends Packet 016 { 017 private int[] field_73589_c; 018 private int[] field_73586_d; 019 public int[] field_73590_a; 020 public int[] field_73588_b; 021 private byte[] field_73587_e; 022 private byte[][] field_73584_f; 023 private int field_73585_g; 024 private boolean field_92024_h; 025 private static byte[] field_73591_h = new byte[0]; 026 private int maxLen = 0; 027 028 private Semaphore deflateGate; 029 030 public Packet56MapChunks() {} 031 032 public Packet56MapChunks(List par1List) 033 { 034 int var2 = par1List.size(); 035 this.field_73589_c = new int[var2]; 036 this.field_73586_d = new int[var2]; 037 this.field_73590_a = new int[var2]; 038 this.field_73588_b = new int[var2]; 039 this.field_73584_f = new byte[var2][]; 040 this.field_92024_h = !par1List.isEmpty() && !((Chunk)par1List.get(0)).worldObj.provider.hasNoSky; 041 int var3 = 0; 042 043 for (int var4 = 0; var4 < var2; ++var4) 044 { 045 Chunk var5 = (Chunk)par1List.get(var4); 046 Packet51MapChunkData var6 = Packet51MapChunk.getMapChunkData(var5, true, 65535); 047 var3 += var6.field_74582_a.length; 048 this.field_73589_c[var4] = var5.xPosition; 049 this.field_73586_d[var4] = var5.zPosition; 050 this.field_73590_a[var4] = var6.field_74580_b; 051 this.field_73588_b[var4] = var6.field_74581_c; 052 this.field_73584_f[var4] = var6.field_74582_a; 053 deflateGate = new Semaphore(1); 054 } 055 056 maxLen = var3; 057 } 058 059 private void deflate() 060 { 061 byte[] data = new byte[maxLen]; 062 int offset = 0; 063 for (int x = 0; x < field_73584_f.length; x++) 064 { 065 System.arraycopy(field_73584_f[x], 0, data, offset, field_73584_f[x].length); 066 offset += field_73584_f[x].length; 067 } 068 069 Deflater var11 = new Deflater(-1); 070 071 try 072 { 073 var11.setInput(data, 0, maxLen); 074 var11.finish(); 075 this.field_73587_e = new byte[maxLen]; 076 this.field_73585_g = var11.deflate(this.field_73587_e); 077 } 078 finally 079 { 080 var11.end(); 081 } 082 } 083 084 /** 085 * Abstract. Reads the raw packet data from the data stream. 086 */ 087 public void readPacketData(DataInputStream par1DataInputStream) throws IOException 088 { 089 short var2 = par1DataInputStream.readShort(); 090 this.field_73585_g = par1DataInputStream.readInt(); 091 this.field_92024_h = par1DataInputStream.readBoolean(); 092 this.field_73589_c = new int[var2]; 093 this.field_73586_d = new int[var2]; 094 this.field_73590_a = new int[var2]; 095 this.field_73588_b = new int[var2]; 096 this.field_73584_f = new byte[var2][]; 097 098 if (field_73591_h.length < this.field_73585_g) 099 { 100 field_73591_h = new byte[this.field_73585_g]; 101 } 102 103 par1DataInputStream.readFully(field_73591_h, 0, this.field_73585_g); 104 byte[] var3 = new byte[196864 * var2]; 105 Inflater var4 = new Inflater(); 106 var4.setInput(field_73591_h, 0, this.field_73585_g); 107 108 try 109 { 110 var4.inflate(var3); 111 } 112 catch (DataFormatException var12) 113 { 114 throw new IOException("Bad compressed data format"); 115 } 116 finally 117 { 118 var4.end(); 119 } 120 121 int var5 = 0; 122 123 for (int var6 = 0; var6 < var2; ++var6) 124 { 125 this.field_73589_c[var6] = par1DataInputStream.readInt(); 126 this.field_73586_d[var6] = par1DataInputStream.readInt(); 127 this.field_73590_a[var6] = par1DataInputStream.readShort(); 128 this.field_73588_b[var6] = par1DataInputStream.readShort(); 129 int var7 = 0; 130 int var8 = 0; 131 int var9; 132 133 for (var9 = 0; var9 < 16; ++var9) 134 { 135 var7 += this.field_73590_a[var6] >> var9 & 1; 136 var8 += this.field_73588_b[var6] >> var9 & 1; 137 } 138 139 var9 = 2048 * 4 * var7 + 256; 140 var9 += 2048 * var8; 141 142 if (this.field_92024_h) 143 { 144 var9 += 2048 * var7; 145 } 146 147 this.field_73584_f[var6] = new byte[var9]; 148 System.arraycopy(var3, var5, this.field_73584_f[var6], 0, var9); 149 var5 += var9; 150 } 151 } 152 153 /** 154 * Abstract. Writes the raw packet data to the data stream. 155 */ 156 public void writePacketData(DataOutputStream par1DataOutputStream) throws IOException 157 { 158 if (field_73587_e == null) 159 { 160 deflateGate.acquireUninterruptibly(); 161 if (field_73587_e == null) 162 { 163 deflate(); 164 } 165 deflateGate.release(); 166 } 167 168 par1DataOutputStream.writeShort(this.field_73589_c.length); 169 par1DataOutputStream.writeInt(this.field_73585_g); 170 par1DataOutputStream.writeBoolean(this.field_92024_h); 171 par1DataOutputStream.write(this.field_73587_e, 0, this.field_73585_g); 172 173 for (int var2 = 0; var2 < this.field_73589_c.length; ++var2) 174 { 175 par1DataOutputStream.writeInt(this.field_73589_c[var2]); 176 par1DataOutputStream.writeInt(this.field_73586_d[var2]); 177 par1DataOutputStream.writeShort((short)(this.field_73590_a[var2] & 65535)); 178 par1DataOutputStream.writeShort((short)(this.field_73588_b[var2] & 65535)); 179 } 180 } 181 182 /** 183 * Passes this Packet on to the NetHandler for processing. 184 */ 185 public void processPacket(NetHandler par1NetHandler) 186 { 187 par1NetHandler.handleMapChunks(this); 188 } 189 190 /** 191 * Abstract. Return the size of the packet (not counting the header). 192 */ 193 public int getPacketSize() 194 { 195 return 6 + this.field_73585_g + 12 * this.func_73581_d(); 196 } 197 198 @SideOnly(Side.CLIENT) 199 public int func_73582_a(int par1) 200 { 201 return this.field_73589_c[par1]; 202 } 203 204 @SideOnly(Side.CLIENT) 205 public int func_73580_b(int par1) 206 { 207 return this.field_73586_d[par1]; 208 } 209 210 public int func_73581_d() 211 { 212 return this.field_73589_c.length; 213 } 214 215 @SideOnly(Side.CLIENT) 216 public byte[] func_73583_c(int par1) 217 { 218 return this.field_73584_f[par1]; 219 } 220 }