/// <summary>
/// Decompresses the idtable stored in the byte stream.
/// </summary>
/// <param name="data">The byte stream containing the compressed table. </param>
/// <param name="index"></param>
private static int DecompressIdTable( byte[] data, ref int index, AdjacencyTable adjacent, out Pixel[] owners )
{
// -- Get a list of province ids
int idCount = -1;
ushort[] idTable = new ushort[IdTableSize];
do {
++idCount;
idTable[idCount] = (ushort)(data[index] + ((data[index+1] & 127) << 8));
index += 2;
} while ( data[index-1] < Terminator );
++idCount;
// -- Fill the ownertable
owners = new Pixel[IdTableSize];
for ( int i=0; i<idCount; ++i ) {
if ( idTable[i] <= Province.Count ) {
owners[i] = new Pixel( 0, idTable[i] );
}
else {
// We're dealing with a pixel that's on a border. Decode some more...
int val = idTable[i];
int color = val&1;
ushort id1 = (ushort)idTable[((val>>9)&63)-4];
if ( id1 >= Province.Count ) id1 = Province.TerraIncognitaID;
//ushort id2 = adjacent == null ? Province.TerraIncognitaID : adjacent.GetAdjacency( id1, (val>>1)&15 ).ID;
ushort id2 = Province.TerraIncognitaID;
byte riveradj = (byte)((val>>5)&15);
if ( riveradj != Adjacent.Invalid && adjacent != null ) {
id2 = id1;
id1 = adjacent.GetAdjacency( id2, riveradj ).ID;
}
owners[i] = new Pixel( 0, id1, id2, (byte)(color+1) );
}
}
return idCount;
}
/// <summary>
/// Decompresses the idtable stored in the byte stream.
/// </summary>
/// <param name="data">The byte stream containing the compressed table. </param>
/// <param name="index"></param>
private void DecompressIdTable( byte[] data, ref int index, AdjacencyTable adjacent )
{
const int IdTableSize = 256;
const int Terminator = 128;
// -- Get a list of province ids
int idCount = -1;
ushort[] idTable = new ushort[IdTableSize];
do {
++idCount;
idTable[idCount] = (ushort)(data[index] + ((data[index+1]&127) << 8));
index += 2;
} while ( data[index-1] < Terminator );
++idCount;
// -- Fill the ownertable
owners = new OwnerInfo[idCount];
for ( int i=0; i<idCount; ++i ) {
if ( idTable[i] < Province.Count ) {
owners[i] = new OwnerInfo( idTable[i] );
}
else {
// We're dealing with a pixel that's on a border. Decode some more...
int val = idTable[i];
int color = val&1;
ushort id1 = (ushort)idTable[((val>>9)&63)-4];
if ( id1 >= Province.Count ) id1 = Province.TerraIncognitaID;
ushort id2 = adjacent == null ? Province.TerraIncognitaID : adjacent.GetAdjacency( id1, (val>>1)&15 ).ID;
owners[i] = new OwnerInfo( id1, id2, (byte)((val>>5)&15) );
}
}
}
