CodeWalker/CodeWalker.Core/GameFiles/Resources/ResourceBuilder.cs

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C#
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using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace CodeWalker.GameFiles
{
public class ResourceBuilder
{
protected const int RESOURCE_IDENT = 0x37435352;
protected const int BASE_SIZE = 0x2000;
private const int SKIP_SIZE = 16;//512;//256;//64;
private const int ALIGN_SIZE = 16;//512;//64;
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public static void GetBlocks(IResourceBlock rootBlock, out IList<IResourceBlock> sys, out IList<IResourceBlock> gfx)
{
var systemBlocks = new HashSet<IResourceBlock>();
var graphicBlocks = new HashSet<IResourceBlock>();
var protectedBlocks = new List<IResourceBlock>();
var stack = new Stack<IResourceBlock>();
stack.Push(rootBlock);
var processed = new HashSet<IResourceBlock>();
processed.Add(rootBlock);
while (stack.Count > 0)
{
var block = stack.Pop();
if (block == null)
continue;
if (block is IResourceSystemBlock)
{
if (!systemBlocks.Contains(block))
systemBlocks.Add(block);
// for system blocks, also process references...
var references = ((IResourceSystemBlock)block).GetReferences();
//Array.Reverse(references);
foreach (var reference in references)
if (!processed.Contains(reference))
{
stack.Push(reference);
processed.Add(reference);
}
var subs = new Stack<IResourceSystemBlock>();
foreach (var part in ((IResourceSystemBlock)block).GetParts())
subs.Push((IResourceSystemBlock)part.Item2);
while (subs.Count > 0)
{
var sub = subs.Pop();
foreach (var x in sub.GetReferences())
if (!processed.Contains(x))
{
stack.Push(x);
processed.Add(x);
}
foreach (var x in sub.GetParts())
subs.Push((IResourceSystemBlock)x.Item2);
protectedBlocks.Add(sub);
}
}
else
{
if (!graphicBlocks.Contains(block))
graphicBlocks.Add(block);
}
}
//var result = new List<IResourceBlock>();
//result.AddRange(systemBlocks);
//result.AddRange(graphicBlocks);
//return result;
// there are now sys-blocks in the list that actually
// only substructures and therefore must not get
// a new position!
// -> remove them from the list
foreach (var q in protectedBlocks)
if (systemBlocks.Contains(q))
systemBlocks.Remove(q);
sys = new List<IResourceBlock>();
foreach (var s in systemBlocks)
sys.Add(s);
gfx = new List<IResourceBlock>();
foreach (var s in graphicBlocks)
gfx.Add(s);
}
public static void AssignPositions(IList<IResourceBlock> blocks, uint basePosition, ref int pageSize, out int pageCount)
{
// find largest structure
long largestBlockSize = 0;
foreach (var block in blocks)
{
if (largestBlockSize < block.BlockLength)
largestBlockSize = block.BlockLength;
}
// find minimum page size
long currentPageSize = pageSize;// 0x2000;
while (currentPageSize < largestBlockSize)
currentPageSize *= 2;
long currentPageCount;
long currentPosition;
while (true)
{
currentPageCount = 0;
currentPosition = 0;
// reset all positions
foreach (var block in blocks)
block.FilePosition = -1;
foreach (var block in blocks)
{
if (block.FilePosition != -1)
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throw new Exception("Block was already assigned a position!");
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//if (block.Length == 0)
// throw new Exception("A length of 0 is not allowed!");
// check if new page is necessary...
// if yes, add a new page and align to it
long maxSpace = currentPageCount * currentPageSize - currentPosition;
if (maxSpace < (block.BlockLength + SKIP_SIZE))
{
currentPageCount++;
currentPosition = currentPageSize * (currentPageCount - 1);
}
// set position
block.FilePosition = basePosition + currentPosition;
currentPosition += block.BlockLength + SKIP_SIZE;
// align...
if ((currentPosition % ALIGN_SIZE) != 0)
currentPosition += (ALIGN_SIZE - (currentPosition % ALIGN_SIZE));
}
// break if everything fits...
if (currentPageCount < 128)
break;
currentPageSize *= 2;
}
pageSize = (int)currentPageSize;
pageCount = (int)currentPageCount;
}
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public static byte[] Build(ResourceFileBase fileBase, int version, bool compress = true)
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{
fileBase.FilePagesInfo = new ResourcePagesInfo();
IList<IResourceBlock> systemBlocks;
IList<IResourceBlock> graphicBlocks;
GetBlocks(fileBase, out systemBlocks, out graphicBlocks);
int systemPageSize = BASE_SIZE;// *4;
int systemPageCount;
AssignPositions(systemBlocks, 0x50000000, ref systemPageSize, out systemPageCount);
int graphicsPageSize = BASE_SIZE;
int graphicsPageCount;
AssignPositions(graphicBlocks, 0x60000000, ref graphicsPageSize, out graphicsPageCount);
//fileBase.FilePagesInfo.SystemPagesCount = 0;
//if (systemPageCount > 0)
// fileBase.FilePagesInfo.SystemPagesCount = 1; // (byte)systemPageCount; //1
fileBase.FilePagesInfo.SystemPagesCount = (byte)systemPageCount;
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fileBase.FilePagesInfo.GraphicsPagesCount = (byte)graphicsPageCount;
var systemStream = new MemoryStream();
var graphicsStream = new MemoryStream();
var resourceWriter = new ResourceDataWriter(systemStream, graphicsStream);
resourceWriter.Position = 0x50000000;
foreach (var block in systemBlocks)
{
resourceWriter.Position = block.FilePosition;
var pos_before = resourceWriter.Position;
block.Write(resourceWriter);
var pos_after = resourceWriter.Position;
if ((pos_after - pos_before) != block.BlockLength)
{
throw new Exception("error in system length");
}
}
resourceWriter.Position = 0x60000000;
foreach (var block in graphicBlocks)
{
resourceWriter.Position = block.FilePosition;
var pos_before = resourceWriter.Position;
block.Write(resourceWriter);
var pos_after = resourceWriter.Position;
if ((pos_after - pos_before) != block.BlockLength)
{
throw new Exception("error in graphics length");
}
}
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var sysDataSize = systemPageCount * systemPageSize;
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var sysData = new byte[sysDataSize];
systemStream.Flush();
systemStream.Position = 0;
systemStream.Read(sysData, 0, (int)systemStream.Length);
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var gfxDataSize = graphicsPageCount * graphicsPageSize;
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var gfxData = new byte[gfxDataSize];
graphicsStream.Flush();
graphicsStream.Position = 0;
graphicsStream.Read(gfxData, 0, (int)graphicsStream.Length);
uint uv = (uint)version;
uint sv = (uv >> 4) & 0xF;
uint gv = (uv >> 0) & 0xF;
//uint sf = RpfResourceFileEntry.GetFlagsFromSize(sysDataSize, sv);
//uint gf = RpfResourceFileEntry.GetFlagsFromSize(gfxDataSize, gv); //TODO: might be broken...
uint sf = RpfResourceFileEntry.GetFlagsFromBlocks((uint)systemPageCount, (uint)systemPageSize, sv);
uint gf = RpfResourceFileEntry.GetFlagsFromBlocks((uint)graphicsPageCount, (uint)graphicsPageSize, gv);
var tdatasize = sysDataSize + gfxDataSize;
var tdata = new byte[tdatasize];
Buffer.BlockCopy(sysData, 0, tdata, 0, sysDataSize);
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;// sysDataSize + gfxDataSize;
var data = new byte[dataSize];
byte[] h1 = BitConverter.GetBytes((uint)0x37435352);
byte[] h2 = BitConverter.GetBytes((int)version);
byte[] h3 = BitConverter.GetBytes(sf);
byte[] h4 = BitConverter.GetBytes(gf);
Buffer.BlockCopy(h1, 0, data, 0, 4);
Buffer.BlockCopy(h2, 0, data, 4, 4);
Buffer.BlockCopy(h3, 0, data, 8, 4);
Buffer.BlockCopy(h4, 0, data, 12, 4);
Buffer.BlockCopy(cdata, 0, data, 16, cdata.Length);
//Buffer.BlockCopy(sysData, 0, data, 16, sysDataSize);
//Buffer.BlockCopy(gfxData, 0, data, 16 + sysDataSize, gfxDataSize);
return data;
}
public static byte[] AddResourceHeader(RpfResourceFileEntry entry, byte[] data)
{
if (data == null) return null;
byte[] newdata = new byte[data.Length + 16];
byte[] h1 = BitConverter.GetBytes((uint)0x37435352);
byte[] h2 = BitConverter.GetBytes(entry.Version);
byte[] h3 = BitConverter.GetBytes(entry.SystemFlags);
byte[] h4 = BitConverter.GetBytes(entry.GraphicsFlags);
Buffer.BlockCopy(h1, 0, newdata, 0, 4);
Buffer.BlockCopy(h2, 0, newdata, 4, 4);
Buffer.BlockCopy(h3, 0, newdata, 8, 4);
Buffer.BlockCopy(h4, 0, newdata, 12, 4);
Buffer.BlockCopy(data, 0, newdata, 16, data.Length);
return newdata;
}
public static byte[] Compress(byte[] data)
{
using (MemoryStream ms = new MemoryStream())
{
DeflateStream ds = new DeflateStream(ms, CompressionMode.Compress, true);
ds.Write(data, 0, data.Length);
ds.Close();
byte[] deflated = ms.GetBuffer();
byte[] outbuf = new byte[ms.Length]; //need to copy to the right size buffer...
Array.Copy(deflated, outbuf, outbuf.Length);
return outbuf;
}
}
public static byte[] Decompress(byte[] data)
{
using (MemoryStream ms = new MemoryStream(data))
{
DeflateStream ds = new DeflateStream(ms, CompressionMode.Decompress);
MemoryStream outstr = new MemoryStream();
ds.CopyTo(outstr);
byte[] deflated = outstr.GetBuffer();
byte[] outbuf = new byte[outstr.Length]; //need to copy to the right size buffer...
Array.Copy(deflated, outbuf, outbuf.Length);
return outbuf;
}
}
}
}