2022-05-03 13:42:46 +04:00

328 lines
12 KiB
C#

//! \file ArcSeraph.cs
//! \date Fri Jul 17 13:47:34 2015
//! \brief Seraphim engine resource archives.
//
// Copyright (C) 2015-2017 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using System.Windows.Media;
using GameRes.Compression;
namespace GameRes.Formats.Seraphim
{
internal class ArchEntry : PackedEntry
{
public short DirIndex;
public short FileIndex;
}
[Serializable]
public class SeraphScheme : ResourceScheme
{
public IDictionary<string, ArchPacScheme> KnownSchemes;
}
[Serializable]
public class ArchPacScheme
{
public long IndexOffset;
public short EventDir;
public IDictionary<short, short> EventMap;
}
internal class SeraphArchive : ArcFile
{
public readonly short EventDir;
public readonly IDictionary<short, short> EventMap;
public SeraphArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, ArchPacScheme scheme)
: base (arc, impl, dir)
{
EventDir = scheme.EventDir;
EventMap = scheme.EventMap;
}
}
/// <summary>
/// this archive format has different index offsets hardcoded into game executable.
/// </summary>
[Export(typeof(ArchiveFormat))]
public class ArchPacOpener : ArchiveFormat
{
public override string Tag { get { return "SERAPH/ARCH"; } }
public override string Description { get { return "Seraphim engine resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public bool IsAmbiguous { get { return true; } }
public ArchPacOpener ()
{
Extensions = new string[] { "dat" };
ContainedFormats = new[] { "CB" };
}
public override ArcFile TryOpen (ArcView file)
{
if (file.MaxOffset > uint.MaxValue
|| !VFS.IsPathEqualsToFileName (file.Name, "ArchPac.dat"))
return null;
foreach (var scheme in KnownSchemes.Values.Where (s => s.IndexOffset < file.MaxOffset).OrderBy (s => s.IndexOffset))
{
var dir = ReadIndex (file, scheme.IndexOffset, file.MaxOffset);
if (dir != null)
{
if (scheme.EventMap != null)
return new SeraphArchive (file, this, dir, scheme);
else
return new ArcFile (file, this, dir);
}
}
var scnpac_name = VFS.ChangeFileName (file.Name, "ScnPac.dat");
if (!VFS.FileExists (scnpac_name))
return null;
using (var scnpac = VFS.OpenView (scnpac_name))
{
uint first_offset = scnpac.View.ReadUInt32 (4);
uint index_offset = scnpac.View.ReadUInt32 (first_offset-4);
var dir = ReadIndex (scnpac, index_offset, file.MaxOffset);
if (dir != null)
return new ArcFile (file, this, dir);
}
return null;
}
// 3 @ ScnPac.Dat : FF 18 05 XX XX XX XX
// FF 16 05 XX XX XX XX
List<Entry> ReadIndex (ArcView file, long index_offset, long max_offset)
{
int base_count = file.View.ReadInt32 (index_offset);
int file_count = file.View.ReadInt32 (index_offset + 4);
index_offset += 8;
if (base_count <= 0 || base_count > 0x40 || !IsSaneCount (file_count))
return null;
var base_offsets = new List<Tuple<uint, int>> (base_count);
int total_count = 0;
for (int i = 0; i < base_count; ++i)
{
uint offset = file.View.ReadUInt32 (index_offset);
int count = file.View.ReadInt32 (index_offset+4);
if (count <= 0 || count > file_count || offset > max_offset)
return null;
total_count += count;
if (total_count > file_count)
return null;
base_offsets.Add (Tuple.Create (offset, count));
index_offset += 8;
}
if (total_count != file_count)
return null;
var dir = new List<Entry> (file_count);
for (int j = base_count-1; j >= 0; --j)
{
uint next_offset = file.View.ReadUInt32 (index_offset);
index_offset += 4;
for (int i = 0; i < base_offsets[j].Item2; ++i)
{
var entry = new ArchEntry {
Name = FormatEntryName (j, i),
Type = "image",
DirIndex = (short)j,
FileIndex = (short)i,
Offset = next_offset,
};
next_offset = file.View.ReadUInt32 (index_offset);
index_offset += 4;
if (next_offset < entry.Offset)
return null;
entry.Size = (uint)(next_offset - entry.Offset);
entry.Offset += base_offsets[j].Item1;
if (!entry.CheckPlacement (max_offset))
return null;
if (entry.Size > 0)
dir.Add (entry);
}
}
if (0 == dir.Count)
return null;
return dir;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (0 == entry.Size)
return Stream.Null;
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var pent = entry as PackedEntry;
if (null == pent)
return input;
if (0x9C78 == (input.Signature & 0xFFFF))
{
pent.IsPacked = true;
return new ZLibStream (input, CompressionMode.Decompress);
}
if (1 == input.Signature && arc.File.View.ReadByte (entry.Offset+4) == 0x78)
{
pent.IsPacked = true;
input.Position = 4;
return new ZLibStream (input, CompressionMode.Decompress);
}
return input;
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var sarc = arc as SeraphArchive;
var aent = entry as ArchEntry;
if (null == sarc || null == aent || null == sarc.EventMap
|| aent.DirIndex != sarc.EventDir || !sarc.EventMap.ContainsKey (aent.FileIndex))
return OpenRawImage (arc, entry);
var base_index = sarc.EventMap[aent.FileIndex];
var base_entry = sarc.Dir.Cast<ArchEntry>()
.FirstOrDefault (e => e.DirIndex == sarc.EventDir && e.FileIndex == base_index);
if (null == base_entry)
return base.OpenImage (arc, entry);
var base_img = OpenCtImage (arc, base_entry);
if (null == base_img)
return base.OpenImage (arc, entry);
var input = arc.OpenBinaryEntry (entry);
return new CtOverlayDecoder (input, base_img);
}
IImageDecoder OpenRawImage (ArcFile arc, Entry entry)
{
var input = arc.OpenBinaryEntry (entry);
try
{
uint width = input.ReadUInt16();
uint height = input.ReadUInt16();
if (width > 0x4100 || 0 == width || 0 == height || width * height * 3 + 4 != input.Length)
{
input.Position = 0;
return new ImageFormatDecoder (input);
}
else
{
var info = new ImageMetaData { Width = width, Height = height, BPP = 24 };
return new RawBitmapDecoder (input, info);
}
}
catch
{
input.Dispose();
throw;
}
}
SeraphReader OpenCtImage (ArcFile arc, Entry entry)
{
using (var input = arc.OpenBinaryEntry (entry))
{
if (input.Signature != CtFormat.Value.Signature)
return null;
var info = CtFormat.Value.ReadMetaData (input) as SeraphMetaData;
if (null == info)
return null;
var reader = new SeraphReader (input.AsStream, info);
reader.UnpackCt();
return reader;
}
}
internal static string FormatEntryName (int dir_index, int file_index)
{
return string.Format ("{0}-{1:D5}.cts", dir_index, file_index);
}
internal static ResourceInstance<ImageFormat> CtFormat = new ResourceInstance<ImageFormat> ("CT");
SeraphScheme m_scheme = new SeraphScheme { KnownSchemes = new Dictionary<string, ArchPacScheme>() };
public override ResourceScheme Scheme
{
get { return m_scheme; }
set { m_scheme = (SeraphScheme)value; }
}
public IDictionary<string, ArchPacScheme> KnownSchemes { get { return m_scheme.KnownSchemes; } }
}
internal class CtOverlayDecoder : BinaryImageDecoder
{
SeraphReader m_baseline;
public CtOverlayDecoder (IBinaryStream input, SeraphReader baseline)
: base (input, baseline.Info)
{
m_baseline = baseline;
}
protected override ImageData GetImageData ()
{
var info = ArchPacOpener.CtFormat.Value.ReadMetaData (m_input) as SeraphMetaData;
if (null == info)
return ImageFormat.Read (m_input);
var overlay = new SeraphReader (m_input.AsStream, info);
overlay.UnpackCt();
var dst = m_baseline.Data;
var src = overlay.Data;
if (dst.Length != src.Length)
return ImageData.Create (overlay.Info, PixelFormats.Bgra32, null, src);
for (int i = 0; i < src.Length; i += 4)
{
if (src[i+3] != 0)
{
dst[i ] = src[i ];
dst[i+1] = src[i+1];
dst[i+2] = src[i+2];
dst[i+3] = src[i+3];
}
else
{
dst[i+3] = 0xFF;
}
}
return ImageData.Create (Info, PixelFormats.Bgra32, null, dst);
}
}
internal class RawBitmapDecoder : BinaryImageDecoder
{
public RawBitmapDecoder (IBinaryStream input, ImageMetaData info) : base (input, info)
{
}
protected override ImageData GetImageData ()
{
m_input.Position = 4;
int stride = (int)Info.Width * 3;
var pixels = m_input.ReadBytes ((int)Info.Height * stride);
return ImageData.Create (Info, PixelFormats.Bgr24, null, pixels, stride);
}
}
}