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419 lines
15 KiB
C#
419 lines
15 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace CodeWalker.GameFiles
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{
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public class ResourceBuilder
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{
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protected const int RESOURCE_IDENT = 0x37435352;
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protected const int BASE_SIZE = 0x2000;
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private const int SKIP_SIZE = 16;//512;//256;//64;
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private const int ALIGN_SIZE = 16;//512;//64;
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public class ResourceBuilderBlock
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{
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public IResourceBlock Block;
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public long Length;
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public ResourceBuilderBlock(IResourceBlock block)
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{
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Block = block;
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Length = block?.BlockLength ?? 0;
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}
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}
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public class ResourceBuilderBlockSet
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{
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public bool IsSystemSet = false;
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public ResourceBuilderBlock RootBlock = null;
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public LinkedList<ResourceBuilderBlock> BlockList = new LinkedList<ResourceBuilderBlock>();
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public Dictionary<ResourceBuilderBlock, LinkedListNode<ResourceBuilderBlock>> BlockDict = new Dictionary<ResourceBuilderBlock, LinkedListNode<ResourceBuilderBlock>>();
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public int Count => BlockList.Count;
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public ResourceBuilderBlockSet(IList<IResourceBlock> blocks, bool sys)
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{
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IsSystemSet = sys;
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if (sys && (blocks.Count > 0))
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{
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RootBlock = new ResourceBuilderBlock(blocks[0]);
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}
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var list = new List<ResourceBuilderBlock>();
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int start = sys ? 1 : 0;
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for (int i = start; i < blocks.Count; i++)
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{
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var bb = new ResourceBuilderBlock(blocks[i]);
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list.Add(bb);
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}
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list.Sort((a, b) => b.Length.CompareTo(a.Length));
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foreach (var bb in list)
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{
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var ln = BlockList.AddLast(bb);
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BlockDict[bb] = ln;
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}
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}
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public ResourceBuilderBlock FindBestBlock(long maxSize)
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{
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var n = BlockList.First;
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while ((n != null) && (n.Value.Length > maxSize))
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{
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n = n.Next;
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}
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return n?.Value;
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}
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public ResourceBuilderBlock TakeBestBlock(long maxSize)
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{
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var r = FindBestBlock(maxSize);
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if (r != null)
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{
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if (BlockDict.TryGetValue(r, out LinkedListNode<ResourceBuilderBlock> ln))
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{
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BlockList.Remove(ln);
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BlockDict.Remove(r);
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}
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}
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return r;
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}
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}
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public static void GetBlocks(IResourceBlock rootBlock, out IList<IResourceBlock> sys, out IList<IResourceBlock> gfx)
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{
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var systemBlocks = new HashSet<IResourceBlock>();
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var graphicBlocks = new HashSet<IResourceBlock>();
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var processed = new HashSet<IResourceBlock>();
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void addBlock(IResourceBlock block)
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{
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if (block is IResourceSystemBlock)
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{
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if (!systemBlocks.Contains(block)) systemBlocks.Add(block);
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}
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else if(block is IResourceGraphicsBlock)
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{
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if (!graphicBlocks.Contains(block)) graphicBlocks.Add(block);
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}
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}
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void addChildren(IResourceBlock block)
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{
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if (block is IResourceSystemBlock sblock)
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{
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var references = sblock.GetReferences();
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foreach (var reference in references)
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{
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if (!processed.Contains(reference))
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{
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processed.Add(reference);
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addBlock(reference);
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addChildren(reference);
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}
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}
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var parts = sblock.GetParts();
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foreach (var part in parts)
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{
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addChildren(part.Item2);
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}
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}
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}
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addBlock(rootBlock);
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addChildren(rootBlock);
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sys = new List<IResourceBlock>();
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foreach (var s in systemBlocks)
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{
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sys.Add(s);
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}
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gfx = new List<IResourceBlock>();
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foreach (var s in graphicBlocks)
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{
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gfx.Add(s);
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}
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}
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public static void AssignPositions(IList<IResourceBlock> blocks, uint basePosition, out RpfResourcePageFlags pageFlags)
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{
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var sys = (basePosition == 0x50000000);
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long pad(long p)
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{
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return ((ALIGN_SIZE - (p % ALIGN_SIZE)) % ALIGN_SIZE);
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}
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long largestBlockSize = 0; // find largest structure
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long startPageSize = BASE_SIZE;// 0x2000; // find starting page size
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long totalBlockSize = 0;
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foreach (var block in blocks)
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{
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var blockLength = block.BlockLength;
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totalBlockSize += blockLength;
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totalBlockSize += pad(totalBlockSize);
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if (largestBlockSize < blockLength)
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{
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largestBlockSize = blockLength;
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}
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}
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while (startPageSize < largestBlockSize)
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{
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startPageSize *= 2;
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}
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pageFlags = new RpfResourcePageFlags();
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var pageSizeMult = 1;
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while (true)
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{
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if (blocks.Count == 0) break;
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var blockset = new ResourceBuilderBlockSet(blocks, sys);
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var rootblock = blockset.RootBlock;
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var currentPosition = 0L;
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var currentPageSize = startPageSize;
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var currentPageStart = 0L;
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var currentPageSpace = startPageSize;
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var currentRemainder = totalBlockSize;
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var pageCount = 1;
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var pageCounts = new uint[9];
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var pageCountIndex = 0;
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var targetPageSize = Math.Max(65536 * pageSizeMult, startPageSize >> (sys ? 5 : 2));
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var minPageSize = Math.Max(512 * pageSizeMult, Math.Min(targetPageSize, startPageSize) >> 4);
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var baseShift = 0u;
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var baseSize = 512;
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while (baseSize < minPageSize)
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{
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baseShift++;
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baseSize *= 2;
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if (baseShift >= 0xF) break;
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}
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var baseSizeMax = baseSize << 8;
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var baseSizeMaxTest = startPageSize;
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while (baseSizeMaxTest < baseSizeMax)
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{
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pageCountIndex++;
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baseSizeMaxTest *= 2;
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}
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pageCounts[pageCountIndex] = 1;
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while (true)
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{
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var isroot = sys && (currentPosition == 0);
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var block = isroot ? rootblock : blockset.TakeBestBlock(currentPageSpace);
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var blockLength = block?.Length ?? 0;
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if (block != null)
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{
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//add this block to the current page.
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block.Block.FilePosition = basePosition + currentPosition;
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var opos = currentPosition;
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currentPosition += blockLength;
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currentPosition += pad(currentPosition);
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var usedspace = currentPosition - opos;
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currentPageSpace -= usedspace;
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currentRemainder -= usedspace;//blockLength;//
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}
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else if (blockset.Count > 0)
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{
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//allocate a new page
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currentPageStart += currentPageSize;
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currentPosition = currentPageStart;
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block = blockset.FindBestBlock(long.MaxValue); //just find the biggest block
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blockLength = block?.Length ?? 0;
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while (blockLength <= (currentPageSize >> 1))//determine best new page size
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{
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if (currentPageSize <= minPageSize) break;
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if (pageCountIndex >= 8) break;
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if ((currentPageSize <= targetPageSize) && (currentRemainder >= (currentPageSize - minPageSize))) break;
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currentPageSize = currentPageSize >> 1;
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pageCountIndex++;
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}
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currentPageSpace = currentPageSize;
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pageCounts[pageCountIndex]++;
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pageCount++;
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}
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else
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{
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break;
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}
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}
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pageFlags = new RpfResourcePageFlags(pageCounts, baseShift);
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if ((pageCount == pageFlags.Count) && (pageFlags.Size >= currentPosition)) //make sure page counts fit in the flags value
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{
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break;
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}
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startPageSize *= 2;
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pageSizeMult *= 2;
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}
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}
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public static byte[] Build(ResourceFileBase fileBase, int version, bool compress = true)
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{
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fileBase.FilePagesInfo = new ResourcePagesInfo();
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IList<IResourceBlock> systemBlocks;
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IList<IResourceBlock> graphicBlocks;
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GetBlocks(fileBase, out systemBlocks, out graphicBlocks);
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RpfResourcePageFlags systemPageFlags;
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AssignPositions(systemBlocks, 0x50000000, out systemPageFlags);
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RpfResourcePageFlags graphicsPageFlags;
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AssignPositions(graphicBlocks, 0x60000000, out graphicsPageFlags);
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fileBase.FilePagesInfo.SystemPagesCount = (byte)systemPageFlags.Count;
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fileBase.FilePagesInfo.GraphicsPagesCount = (byte)graphicsPageFlags.Count;
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var systemStream = new MemoryStream();
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var graphicsStream = new MemoryStream();
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var resourceWriter = new ResourceDataWriter(systemStream, graphicsStream);
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resourceWriter.Position = 0x50000000;
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foreach (var block in systemBlocks)
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{
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resourceWriter.Position = block.FilePosition;
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var pos_before = resourceWriter.Position;
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block.Write(resourceWriter);
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var pos_after = resourceWriter.Position;
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if ((pos_after - pos_before) != block.BlockLength)
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{
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throw new Exception("error in system length");
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}
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}
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resourceWriter.Position = 0x60000000;
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foreach (var block in graphicBlocks)
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{
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resourceWriter.Position = block.FilePosition;
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var pos_before = resourceWriter.Position;
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block.Write(resourceWriter);
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var pos_after = resourceWriter.Position;
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if ((pos_after - pos_before) != block.BlockLength)
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{
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throw new Exception("error in graphics length");
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}
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}
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var sysDataSize = (int)systemPageFlags.Size;
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var sysData = new byte[sysDataSize];
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systemStream.Flush();
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systemStream.Position = 0;
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systemStream.Read(sysData, 0, (int)systemStream.Length);
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var gfxDataSize = (int)graphicsPageFlags.Size;
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var gfxData = new byte[gfxDataSize];
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graphicsStream.Flush();
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graphicsStream.Position = 0;
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graphicsStream.Read(gfxData, 0, (int)graphicsStream.Length);
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uint uv = (uint)version;
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uint sv = (uv >> 4) & 0xF;
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uint gv = (uv >> 0) & 0xF;
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uint sf = systemPageFlags.Value + (sv << 28);
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uint gf = graphicsPageFlags.Value + (gv << 28);
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var tdatasize = sysDataSize + gfxDataSize;
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var tdata = new byte[tdatasize];
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Buffer.BlockCopy(sysData, 0, tdata, 0, sysDataSize);
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Buffer.BlockCopy(gfxData, 0, tdata, sysDataSize, gfxDataSize);
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var cdata = compress ? Compress(tdata) : tdata;
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var dataSize = 16 + cdata.Length;
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var data = new byte[dataSize];
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byte[] h1 = BitConverter.GetBytes((uint)0x37435352);
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byte[] h2 = BitConverter.GetBytes((int)version);
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byte[] h3 = BitConverter.GetBytes(sf);
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byte[] h4 = BitConverter.GetBytes(gf);
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Buffer.BlockCopy(h1, 0, data, 0, 4);
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Buffer.BlockCopy(h2, 0, data, 4, 4);
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Buffer.BlockCopy(h3, 0, data, 8, 4);
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Buffer.BlockCopy(h4, 0, data, 12, 4);
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Buffer.BlockCopy(cdata, 0, data, 16, cdata.Length);
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return data;
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}
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public static byte[] AddResourceHeader(RpfResourceFileEntry entry, byte[] data)
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{
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if (data == null) return null;
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byte[] newdata = new byte[data.Length + 16];
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byte[] h1 = BitConverter.GetBytes((uint)0x37435352);
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byte[] h2 = BitConverter.GetBytes(entry.Version);
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byte[] h3 = BitConverter.GetBytes(entry.SystemFlags);
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byte[] h4 = BitConverter.GetBytes(entry.GraphicsFlags);
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Buffer.BlockCopy(h1, 0, newdata, 0, 4);
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Buffer.BlockCopy(h2, 0, newdata, 4, 4);
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Buffer.BlockCopy(h3, 0, newdata, 8, 4);
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Buffer.BlockCopy(h4, 0, newdata, 12, 4);
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Buffer.BlockCopy(data, 0, newdata, 16, data.Length);
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return newdata;
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}
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public static byte[] Compress(byte[] data)
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{
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using (MemoryStream ms = new MemoryStream())
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{
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DeflateStream ds = new DeflateStream(ms, CompressionMode.Compress, true);
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ds.Write(data, 0, data.Length);
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ds.Close();
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byte[] deflated = ms.GetBuffer();
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byte[] outbuf = new byte[ms.Length]; //need to copy to the right size buffer...
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Array.Copy(deflated, outbuf, outbuf.Length);
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return outbuf;
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}
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}
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public static byte[] Decompress(byte[] data)
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{
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using (MemoryStream ms = new MemoryStream(data))
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{
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DeflateStream ds = new DeflateStream(ms, CompressionMode.Decompress);
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MemoryStream outstr = new MemoryStream();
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ds.CopyTo(outstr);
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byte[] deflated = outstr.GetBuffer();
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byte[] outbuf = new byte[outstr.Length]; //need to copy to the right size buffer...
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Array.Copy(deflated, outbuf, outbuf.Length);
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return outbuf;
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}
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}
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}
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}
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