private static byte[] Compress(byte[] zlib)
{
// Create a GZIP stream with decompression mode.
// ... Then create a buffer and write into while reading from the GZIP stream.
using (MemoryStream memory = new MemoryStream())
{
var def = new Deflater();
def.setInput(gzip);
def.finish();
var decompressStream = new MemoryStream();
int i = 0;
var buffer = new byte[1024 * 1024];
while ((i = def.deflate(buffer)) > 0)
{
decompressStream.Write(buffer, 0, i);
}
return(decompressStream.ToArray());
}
//using (GZipStream stream = new GZipStream(memory, CompressionMode.Compress))
//{
// stream.Write(gzip, 0, gzip.Length);
// stream.Flush();
// stream.Close();
// return memory.ToArray();
//}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: @Override public void writeEnd() throws java.io.IOException
public override void writeEnd()
{
// See https://en.wikipedia.org/wiki/Portable_Network_Graphics
// for detailed information about the PNG file format
sbyte[] fileHeader = new sbyte[8];
fileHeader[0] = unchecked ((sbyte)0x89);
fileHeader[1] = (sbyte)'P';
fileHeader[2] = (sbyte)'N';
fileHeader[3] = (sbyte)'G';
fileHeader[4] = (sbyte)'\r';
fileHeader[5] = (sbyte)'\n';
fileHeader[6] = (sbyte)0x1A;
fileHeader[7] = (sbyte)'\n';
sbyte[] ihdr = new sbyte[13 + 8 + 4];
storeBigEndianInt(ihdr, 0, 13);
storeChunkType(ihdr, 4, 'I', 'H', 'D', 'R');
storeBigEndianInt(ihdr, 8, width);
storeBigEndianInt(ihdr, 12, height);
ihdr[16] = 8; // bit depth
ihdr[17] = 6; // color type: red, green, blue, alpha
ihdr[18] = 0; // compression method: deflate/inflate
ihdr[19] = 0; // filter method: none
ihdr[20] = 0; // interlace method: no interlace
storeCRC(ihdr, 21);
Deflater deflater = new Deflater();
deflater.Input = buffer;
deflater.finish();
sbyte[] data = new sbyte[buffer.Length];
int dataLength = deflater.deflate(data);
sbyte[] idat = new sbyte[8 + dataLength + 4];
storeBigEndianInt(idat, 0, dataLength);
storeChunkType(idat, 4, 'I', 'D', 'A', 'T');
Array.Copy(data, 0, idat, 8, dataLength);
storeCRC(idat, 8 + dataLength);
sbyte[] iend = new sbyte[12];
storeBigEndianInt(iend, 0, 0);
storeChunkType(iend, 4, 'I', 'E', 'N', 'D');
storeCRC(iend, 8);
System.IO.Stream outStream = new System.IO.FileStream(fileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
outStream.Write(fileHeader, 0, fileHeader.Length);
outStream.Write(ihdr, 0, ihdr.Length);
outStream.Write(idat, 0, idat.Length);
outStream.Write(iend, 0, iend.Length);
outStream.Close();
}
public Packet51MapChunk(int i, int j, int k, int l, int i1, int j1, World world)
{
isChunkDataPacket = true;
xPosition = i;
yPosition = j;
zPosition = k;
xSize = l;
ySize = i1;
zSize = j1;
byte[] abyte0 = world.getChunkData(i, j, k, l, i1, j1);
var deflater = new Deflater(1);
try
{
deflater.setInput(abyte0);
deflater.finish();
chunk = new byte[(l * i1 * j1 * 5) / 2];
chunkSize = deflater.deflate(chunk);
}
finally
{
deflater.end();
}
}
private static int compress(int tp, byte[] inBytes, int inSize, byte[] outBytes)
{
if (inSize == 0)
{
return(0);
}
int t1 = 0, t2 = (inSize + 1) / 2;
int inPtr = 0, ret;
byte[] tmp = new byte[inSize];
// zip and rle treat the data first, in the same way so I'm not
// repeating the code
if ((tp == ZIP_COMPRESSION) || (tp == RLE_COMPRESSION))
{
// reorder the pixel data ~ straight from ImfZipCompressor.cpp :)
while (true)
{
if (inPtr < inSize)
{
tmp[t1++] = inBytes[inPtr++];
}
else
{
break;
}
if (inPtr < inSize)
{
tmp[t2++] = inBytes[inPtr++];
}
else
{
break;
}
}
// Predictor ~ straight from ImfZipCompressor.cpp :)
t1 = 1;
int p = tmp[t1 - 1];
while (t1 < inSize)
{
int d = (int)tmp[t1] - p + (128 + 256);
p = (int)tmp[t1];
tmp[t1] = (byte)d;
t1++;
}
}
// We'll just jump from here to the wanted compress/decompress stuff if
// need be
switch (tp)
{
case ZIP_COMPRESSION:
Deflater def = new Deflater(Deflater.DEFAULT_COMPRESSION, false);
def.setInput(tmp, 0, inSize);
def.finish();
ret = def.deflate(outBytes);
return(ret);
case RLE_COMPRESSION:
return(rleCompress(tmp, inSize, outBytes));
default:
return(-1);
}
}
private static int compress(int tp, byte[] inBytes, int inSize, byte[] outBytes)
{
if (inSize == 0)
return 0;
int t1 = 0, t2 = (inSize + 1) / 2;
int inPtr = 0, ret;
byte[] tmp = new byte[inSize];
// zip and rle treat the data first, in the same way so I'm not
// repeating the code
if ((tp == ZIP_COMPRESSION) || (tp == RLE_COMPRESSION))
{
// reorder the pixel data ~ straight from ImfZipCompressor.cpp :)
while (true)
{
if (inPtr < inSize)
tmp[t1++] = inBytes[inPtr++];
else
break;
if (inPtr < inSize)
tmp[t2++] = inBytes[inPtr++];
else
break;
}
// Predictor ~ straight from ImfZipCompressor.cpp :)
t1 = 1;
int p = tmp[t1 - 1];
while (t1 < inSize)
{
int d = (int)tmp[t1] - p + (128 + 256);
p = (int)tmp[t1];
tmp[t1] = (byte)d;
t1++;
}
}
// We'll just jump from here to the wanted compress/decompress stuff if
// need be
switch (tp)
{
case ZIP_COMPRESSION:
Deflater def = new Deflater(Deflater.DEFAULT_COMPRESSION, false);
def.setInput(tmp, 0, inSize);
def.finish();
ret = def.deflate(outBytes);
return ret;
case RLE_COMPRESSION:
return rleCompress(tmp, inSize, outBytes);
default:
return -1;
}
}
