public override byte[] GetBytes(Stream instream)
{
if (_cache != null)
{
instream.Write(_cache);
return(_cache);
}
using (var stream = new MemoryStream())
{
stream.WriteByte(8); // version
int numberOfStores = 1;
stream.WriteByte((byte)numberOfStores); // storage size
List <uint> palette = new List <uint>(10);
byte[] indexes = new byte[_blocks.Length];
for (int i = 0; i < numberOfStores; i++)
{
palette.Clear();
stream.WriteByte((8 << 1) | 1); // version
int index = 0;
uint prevHash = uint.MaxValue;
for (int b = 0; b < _blocks.Length; b++)
{
byte bid = (byte)_blocks[b];
byte data = _metadata[b];
uint hash = BlockFactory.GetRuntimeId(bid, data);
if (hash != prevHash)
{
index = palette.IndexOf(hash);
if (index == -1)
{
palette.Add(hash);
}
index = palette.IndexOf(hash);
}
indexes[b] = (byte)index;
prevHash = hash;
}
stream.Write(indexes, 0, indexes.Length);
VarInt.WriteSInt32(stream, palette.Count); // count
foreach (var val in palette)
{
VarInt.WriteSInt32(stream, (int)val);
}
}
var bytes = stream.ToArray();
instream.Write(bytes);
_cache = bytes;
}
return(_cache);
}
public static Item GetItem(short id, short metadata = 0, int count = 1)
{
Item item = null;
if (CustomItemFactory != null)
{
item = CustomItemFactory.GetItem(id, metadata, count);
}
if (item != null)
{
return(item);
}
if (id == 0)
{
item = new ItemAir();
}
else if (id == 256)
{
item = new ItemIronShovel();
}
else if (id == 257)
{
item = new ItemIronPickaxe();
}
else if (id == 258)
{
item = new ItemIronAxe();
}
else if (id == 259)
{
item = new ItemFlintAndSteel();
}
else if (id == 260)
{
item = new ItemApple();
}
else if (id == 261)
{
item = new ItemBow();
}
else if (id == 262)
{
item = new ItemArrow();
}
else if (id == 263)
{
item = new ItemCoal();
}
else if (id == 264)
{
item = new ItemDiamond();
}
else if (id == 265)
{
item = new ItemIronIngot();
}
else if (id == 266)
{
item = new ItemGoldIngot();
}
else if (id == 267)
{
item = new ItemIronSword();
}
else if (id == 268)
{
item = new ItemWoodenSword();
}
else if (id == 269)
{
item = new ItemWoodenShovel();
}
else if (id == 270)
{
item = new ItemWoodenPickaxe();
}
else if (id == 271)
{
item = new ItemWoodenAxe();
}
else if (id == 272)
{
item = new ItemStoneSword();
}
else if (id == 273)
{
item = new ItemStoneShovel();
}
else if (id == 274)
{
item = new ItemStonePickaxe();
}
else if (id == 275)
{
item = new ItemStoneAxe();
}
else if (id == 276)
{
item = new ItemDiamondSword();
}
else if (id == 277)
{
item = new ItemDiamondShovel();
}
else if (id == 278)
{
item = new ItemDiamondPickaxe();
}
else if (id == 279)
{
item = new ItemDiamondAxe();
}
else if (id == 280)
{
item = new ItemStick();
}
else if (id == 283)
{
item = new ItemGoldenSword();
}
else if (id == 284)
{
item = new ItemGoldenShovel();
}
else if (id == 285)
{
item = new ItemGoldenPickaxe();
}
else if (id == 286)
{
item = new ItemGoldenAxe();
}
else if (id == 290)
{
item = new ItemWoodenHoe();
}
else if (id == 291)
{
item = new ItemStoneHoe();
}
else if (id == 292)
{
item = new ItemIronHoe();
}
else if (id == 293)
{
item = new ItemDiamondHoe();
}
else if (id == 294)
{
item = new ItemGoldenHoe();
}
else if (id == 295)
{
item = new ItemWheatSeeds();
}
else if (id == 296)
{
item = new ItemWheat();
}
else if (id == 297)
{
item = new ItemBread();
}
else if (id == 298)
{
item = new ItemLeatherHelmet();
}
else if (id == 299)
{
item = new ItemLeatherChestplate();
}
else if (id == 300)
{
item = new ItemLeatherLeggings();
}
else if (id == 301)
{
item = new ItemLeatherBoots();
}
else if (id == 302)
{
item = new ItemChainmailHelmet();
}
else if (id == 303)
{
item = new ItemChainmailChestplate();
}
else if (id == 304)
{
item = new ItemChainmailLeggings();
}
else if (id == 305)
{
item = new ItemChainmailBoots();
}
else if (id == 309)
{
item = new ItemIronBoots();
}
else if (id == 308)
{
item = new ItemIronLeggings();
}
else if (id == 307)
{
item = new ItemIronChestplate();
}
else if (id == 306)
{
item = new ItemIronHelmet();
}
else if (id == 310)
{
item = new ItemDiamondHelmet();
}
else if (id == 311)
{
item = new ItemDiamondChestplate();
}
else if (id == 312)
{
item = new ItemDiamondLeggings();
}
else if (id == 313)
{
item = new ItemDiamondBoots();
}
else if (id == 314)
{
item = new ItemGoldHelmet();
}
else if (id == 315)
{
item = new ItemGoldChestplate();
}
else if (id == 316)
{
item = new ItemGoldLeggings();
}
else if (id == 317)
{
item = new ItemGoldBoots();
}
else if (id == 319)
{
item = new ItemRawPorkchop();
}
else if (id == 320)
{
item = new ItemCookedPorkshop();
}
else if (id == 321)
{
item = new ItemPainting();
}
else if (id == 322)
{
item = new ItemGoldenApple();
}
else if (id == 323)
{
item = new ItemSign();
}
else if (id == 324)
{
item = new ItemWoodenDoor();
}
else if (id == 325)
{
item = new ItemBucket(metadata);
}
else if (id == 329)
{
item = new ItemSaddle();
}
else if (id == 331)
{
item = new ItemRedstone();
}
else if (id == 332)
{
item = new ItemSnowball();
}
else if (id == 333)
{
item = new ItemBoat(metadata);
}
else if (id == 340)
{
item = new ItemBook();
}
else if (id == 344)
{
item = new ItemEgg();
}
else if (id == 345)
{
item = new ItemCompass();
}
else if (id == 351)
{
item = new ItemDye();
}
else if (id == 352)
{
item = new ItemBone();
}
else if (id == 352)
{
item = new ItemSugar();
}
else if (id == 355)
{
item = new ItemBed();
}
else if (id == 357)
{
item = new ItemCookie();
}
else if (id == 358)
{
item = new ItemMap();
}
else if (id == 359)
{
item = new ItemShears();
}
else if (id == 360)
{
item = new ItemMelonSlice();
}
else if (id == 363)
{
item = new ItemBeef();
}
else if (id == 364)
{
item = new ItemCookedBeef();
}
else if (id == 365)
{
item = new ItemRawChicken();
}
else if (id == 366)
{
item = new ItemCookedChicken();
}
else if (id == 369)
{
item = new ItemBlazeRod();
}
else if (id == 371)
{
item = new ItemGoldNugget();
}
else if (id == 373)
{
item = new ItemPotion(metadata);
}
else if (id == 377)
{
item = new ItemBlazePowder();
}
else if (id == 380)
{
item = new ItemCauldron();
}
else if (id == 383)
{
item = new ItemMonsterEgg(metadata);
}
else if (id == 389)
{
item = new ItemFrame();
}
else if (id == 391)
{
item = new ItemCarrot();
}
else if (id == 392)
{
item = new ItemPotato();
}
else if (id == 393)
{
item = new ItemBakedPotato();
}
else if (id == 395)
{
item = new ItemEmptyMap();
}
else if (id == 395)
{
item = new ItemGoldenCarrot();
}
else if (id == 397)
{
item = new ItemMobHead(metadata);
}
else if (id == 400)
{
item = new ItemPumpkinPie();
}
else if (id == 401)
{
item = new ItemFireworks();
}
else if (id == 403)
{
item = new ItemEnchantedBook();
}
else if (id == 416)
{
item = new ItemHorseArmorLeather();
}
else if (id == 417)
{
item = new ItemHorseArmorIron();
}
else if (id == 418)
{
item = new ItemHorseArmorGold();
}
else if (id == 419)
{
item = new ItemHorseArmorDiamond();
}
else if (id == 423)
{
item = new ItemMuttonRaw();
}
else if (id == 424)
{
item = new ItemMuttonCooked();
}
else if (id == 427)
{
item = new ItemSpruceDoor();
}
else if (id == 428)
{
item = new ItemBirchDoor();
}
else if (id == 429)
{
item = new ItemJungleDoor();
}
else if (id == 430)
{
item = new ItemAcaciaDoor();
}
else if (id == 431)
{
item = new ItemDarkOakDoor();
}
else if (id == 444)
{
item = new ItemElytra();
}
else if (id == 446)
{
item = new ItemBanner();
}
else if (id == 452)
{
item = new ItemIronNugget();
}
else if (id == 454 && metadata == 0)
{
item = new ItemSlate();
}
else if (id == 454 && metadata == 1)
{
item = new ItemPoster();
}
else if (id == 454 && metadata == 2)
{
item = new ItemBoard();
}
else if (id == 458)
{
item = new ItemBeetrootSeeds();
}
else if (id == 498)
{
item = new ItemCamera(metadata);
}
else if (id <= 255)
{
int blockId = id;
if (blockId < 0)
{
blockId = (short)(Math.Abs(id) + 255); // hehe
}
Block block = BlockFactory.GetBlockById(blockId);
var runtimeId = BlockFactory.GetRuntimeId(blockId, (byte)metadata);
if (runtimeId < BlockFactory.BlockPalette.Count)
{
var blockState = BlockFactory.BlockPalette[(int)runtimeId];
block.SetState(blockState);
}
if (CustomBlockItemFactory == null)
{
item = new ItemBlock(block, metadata);
}
else
{
item = CustomBlockItemFactory.GetBlockItem(block, metadata, count);
}
}
else
{
item = new Item(id, metadata, count);
}
// This might now be a good idea if the constructor changes these
// properties for custom items.
item.Metadata = metadata;
item.Count = (byte)count;
return(item);
}
private void ParseSection(SubChunk section, ReadOnlySpan <byte> data)
{
var reader = new SpanReader();
var version = reader.ReadByte(data);
if (version != 8)
{
throw new Exception("Wrong chunk version");
}
var storageSize = reader.ReadByte(data);
for (int storage = 0; storage < storageSize; storage++)
{
byte paletteAndFlag = reader.ReadByte(data);
bool isRuntime = (paletteAndFlag & 1) != 0;
if (isRuntime)
{
throw new Exception("Can't use runtime for persistent storage.");
}
int bitsPerBlock = paletteAndFlag >> 1;
int blocksPerWord = (int)Math.Floor(32d / bitsPerBlock);
int wordCount = (int)Math.Ceiling(4096d / blocksPerWord);
int blockIndex = reader.Position;
reader.Position += wordCount * 4;
int paletteSize = reader.ReadInt32(data);
var palette = new Dictionary <int, (short, byte)>();
for (int j = 0; j < paletteSize; j++)
{
var file = new NbtFile {
BigEndian = false, UseVarInt = false
};
var buffer = data.Slice(reader.Position).ToArray();
int numberOfBytesRead = (int)file.LoadFromStream(new MemoryStream(buffer), NbtCompression.None);
reader.Position += numberOfBytesRead;
var tag = file.RootTag;
string blockName = tag["name"].StringValue;
Block block = BlockFactory.GetBlockByName(blockName);
short blockId = 0;
if (block != null)
{
blockId = (short)block.Id;
}
else
{
Log.Warn($"Missing block={blockName}");
}
short blockMeta = tag["val"].ShortValue;
palette.Add(j, (blockId, (byte)blockMeta));
}
int nextStore = reader.Position;
reader.Position = blockIndex;
int position = 0;
for (int wordIdx = 0; wordIdx < wordCount; wordIdx++)
{
uint word = reader.ReadUInt32(data);
for (int block = 0; block < blocksPerWord; block++)
{
if (position >= 4096)
{
continue; // padding bytes
}
int state = (int)((word >> ((position % blocksPerWord) * bitsPerBlock)) & ((1 << bitsPerBlock) - 1));
int x = (position >> 8) & 0xF;
int y = position & 0xF;
int z = (position >> 4) & 0xF;
if (state > palette.Count)
{
Log.Error($"Got wrong state={state} from word. bitsPerBlock={bitsPerBlock}, blocksPerWord={blocksPerWord}, Word={word}");
}
short bid = palette[state].Item1;
byte metadata = palette[state].Item2;
int runtimeId = (int)BlockFactory.GetRuntimeId(bid, metadata);
if (storage == 0)
{
section.SetBlockByRuntimeId(x, y, z, runtimeId);
}
else
{
section.SetLoggedBlockByRuntimeId(x, y, z, runtimeId);
}
position++;
}
}
reader.Position = nextStore;
}
}
public void EncodePalettedChunk()
{
//PaletteChunk chunk = new PaletteChunk();
//chunk.GetBytes()
uint waste = BlockFactory.GetRuntimeId(0, 0);
int[] legacyToRuntimeId = BlockFactory.LegacyToRuntimeId;
short[] blocks = new short[4096];
Random random = new Random();
for (int i = 0; i < blocks.Length; i++)
{
blocks[i] = (short)random.Next(8);
}
//blocks[0] = 0b000;
//blocks[1] = 0b111;
//blocks[2] = 0b111;
//blocks[3] = 0b111;
//blocks[4] = 0b111;
//blocks[5] = 0b111;
//blocks[6] = 0b111;
//blocks[7] = 0b001;
//blocks[8] = 0b010;
//blocks[9] = 0b011;
//blocks[10] = 0b100;
//blocks[11] = 0b101;
byte[] metas = new byte[4096];
int count = 10_000;
var sw = Stopwatch.StartNew();
for (int c = 0; c < count; c++)
{
for (int sc = 0; sc < 8; sc++)
{
var palette = new Dictionary <uint, byte>();
uint prevHash = uint.MaxValue;
for (int i = 0; i < 4096; i++)
{
uint hash = (uint)blocks[i] << 4 | metas[i];
if (hash == prevHash)
{
continue;
}
prevHash = hash;
palette[hash] = 0;
}
// log2(number of entries) => bits needed to store them
//Assert.AreEqual(0, Math.Ceiling(Math.Log(1, 2)));
//Assert.AreEqual(1, Math.Ceiling(Math.Log(2, 2)));
//Assert.AreEqual(2, Math.Ceiling(Math.Log(3, 2)));
//Assert.AreEqual(2, Math.Ceiling(Math.Log(4, 2)));
//Assert.AreEqual(3, Math.Ceiling(Math.Log(5, 2)));
//Assert.AreEqual(3, Math.Ceiling(Math.Log(palette.Count, 2)));
//Assert.AreEqual(3, Math.Ceiling(Math.Log(8, 2)));
//Assert.AreEqual(4, Math.Ceiling(Math.Log(9, 2)));
//Assert.AreEqual(4, Math.Ceiling(Math.Log(16, 2)));
//Assert.AreEqual(5, Math.Ceiling(Math.Log(17, 2)));
//Assert.AreEqual(5, Math.Ceiling(Math.Log(32, 2)));
//Assert.AreEqual(6, Math.Ceiling(Math.Log(33, 2)));
//Assert.AreEqual(6, Math.Ceiling(Math.Log(64, 2)));
//Assert.AreEqual(7, Math.Ceiling(Math.Log(65, 2)));
//Assert.AreEqual(7, Math.Ceiling(Math.Log(128, 2)));
//Assert.AreEqual(8, Math.Ceiling(Math.Log(129, 2)));
//Assert.AreEqual(8, Math.Ceiling(Math.Log(256, 2)));
//Assert.AreEqual(16, Math.Ceiling(Math.Log(ushort.MaxValue, 2)));
int bitsPerBlock = (int)Math.Ceiling(Math.Log(palette.Count, 2));
switch (bitsPerBlock)
{
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
//Paletted1 = 1, // 32 blocks per word
//Paletted2 = 2, // 16 blocks per word
//Paletted3 = 3, // 10 blocks and 2 bits of padding per word
//Paletted4 = 4, // 8 blocks per word
//Paletted5 = 5, // 6 blocks and 2 bits of padding per word
//Paletted6 = 6, // 5 blocks and 2 bits of padding per word
break;
case 7:
case 8:
//Paletted8 = 8, // 4 blocks per word
bitsPerBlock = 8;
break;
case int i when i > 8:
//Paletted16 = 16, // 2 blocks per word
bitsPerBlock = 16;
break;
default:
break;
}
int blocksPerWord = (int)Math.Floor(32f / bitsPerBlock); // Floor to remove padding bits
int wordsPerChunk = (int)Math.Ceiling(4096f / blocksPerWord);
Assert.AreEqual(10, blocksPerWord);
byte t = 0;
foreach (var b in palette.ToArray())
{
palette[b.Key] = t++;
}
uint[] indexes = new uint[wordsPerChunk];
int position = 0;
for (int w = 0; w < wordsPerChunk; w++)
{
uint word = 0;
for (int block = 0; block < blocksPerWord; block++)
{
if (position >= 4096)
{
continue;
}
uint state = palette[(uint)blocks[position] << 4 | metas[position]];
word |= state << (bitsPerBlock * block);
//string bin = Convert.ToString(word, 2);
//bin = new string('0', 32 - bin.Length) + bin;
//Console.WriteLine($"{bin}");
position++;
}
indexes[w] = word;
}
}
}
Console.WriteLine($"time={sw.ElapsedMilliseconds}");
}
