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2023-08-24 01:33:50 +04:00
//! \file ArcDAT.cs
//! \date 2022 Nov 09
//! \brief Black Butterfly resource archive.
//
// Copyright (C) 2022 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 GameRes.Utility;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.BlackButterfly
{
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
public override string Tag { get { return "DAT/PITA"; } }
public override string Description { get { return "Black Butterfly resource archive"; } }
public override uint Signature { get { return 0x41544950; } } // 'PITA'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
return null;
uint index_pos = 0x10;
uint next_offset = file.View.ReadUInt32 (index_pos);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
index_pos += 4;
var entry = new PackedEntry {
Name = string.Format ("{0:D5}.bmp", i),
Type = "image",
Offset = next_offset,
};
next_offset = file.View.ReadUInt32 (index_pos);
entry.Size = (uint)(next_offset - entry.Offset);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var pent = (PackedEntry)entry;
if (!pent.IsPacked)
{
pent.IsPacked = true;
pent.UnpackedSize = arc.File.View.ReadUInt32 (pent.Offset);
}
using (var input = arc.File.CreateStream (pent.Offset+4, pent.Size-4))
{
var data = new byte[pent.UnpackedSize];
Unpack (input, data);
return new BinMemoryStream (data, entry.Name);
}
}
void Unpack (IBinaryStream input, byte[] output)
{
int dst = 0;
while (input.PeekByte() != -1)
{
byte ctl = input.ReadUInt8();
if (0x7F == ctl)
{
if (input.PeekByte() == 0xFF)
break;
}
int count;
if (ctl <= 0x7F)
{
count = (ctl >> 2) + 2;
int offset = (ctl & 3) << 8 | input.ReadUInt8();
offset = (offset ^ 0x3FF) + 1;
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
}
else if (ctl > 0xFE)
{
count = input.ReadUInt8() + 32;
while (count --> 0)
output[dst++] = 0;
}
else if (ctl > 0xDF)
{
count = (ctl & 0x1F) + 1;
while (count --> 0)
output[dst++] = 0;
}
else if (ctl > 0xBF)
{
count = (ctl & 0x1F) + 2;
byte fill = input.ReadUInt8();
while (count --> 0)
output[dst++] = fill;
}
else if (ctl > 0x9F)
{
count = (ctl & 0x1F) + 1;
while (count --> 0)
{
output[dst++] = 0;
output[dst++] = input.ReadUInt8();
}
}
else
{
count = (ctl & 0x1F) + 1;
input.Read (output, dst, count);
dst += count;
}
}
}
}
}