GARbro-mirror/ArcFormats/Speed/ArcARC.cs

137 lines
5.6 KiB
C#
Raw Normal View History

2018-10-09 18:41:13 +08:00
//! \file ArcARC.cs
//! \date 2018 Oct 09
//! \brief Speed resource archive.
//
// Copyright (C) 2018 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Speed
{
[Export(typeof(ArchiveFormat))]
public class ArcOpener : ArchiveFormat
{
public override string Tag { get { return "ARC/REC"; } }
public override string Description { get { return "REC engine resource archive"; } }
public override uint Signature { get { return 0xFF; } }
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 (8);
if (!IsSaneCount (count))
return null;
uint rec_length = file.View.ReadUInt32 (0);
if (rec_length < 0x10 || rec_length > 0x200)
return null;
int rec_count = file.View.ReadInt32 (4);
if (rec_count < count || rec_length * rec_count >= file.MaxOffset)
return null;
long index_offset = 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, rec_length);
var entry = Create<Entry> (name);
dir.Add (entry);
index_offset += rec_length;
}
index_offset = 0x10 + rec_length * (rec_count + 2);
rec_length = file.View.ReadUInt32 (index_offset);
rec_count = file.View.ReadInt32 (index_offset+4);
if (rec_length != 4 || count != file.View.ReadInt32 (index_offset+8))
return null;
index_offset += 0x10;
long data_offset = index_offset + rec_length * (rec_count + 2) + 4;
foreach (var entry in dir)
{
entry.Offset = data_offset + file.View.ReadUInt32 (index_offset);
if (entry.Type == "image")
entry.Offset += 16;
else
entry.Offset += 4;
if (entry.Offset > file.MaxOffset)
return null;
index_offset += rec_length;
}
for (int i = 1; i < count; ++i)
dir[i-1].Size = (uint)(dir[i].Offset - 4 - dir[i-1].Offset);
dir[count-1].Size = (uint)(file.MaxOffset - dir[count-1].Offset);
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
uint size = arc.File.View.ReadUInt32 (entry.Offset-4);
return arc.File.CreateStream (entry.Offset, size, entry.Name);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
int width = arc.File.View.ReadInt32 (entry.Offset-16);
int height = arc.File.View.ReadInt32 (entry.Offset-12);
uint unpacked_size = arc.File.View.ReadUInt32 (entry.Offset-8);
using (var input = OpenEntry (arc, entry))
{
var pixels = new byte[unpacked_size];
LzUnpack (input, pixels);
var bitmap = BitmapSource.Create (width, height, ImageData.DefaultDpiX, ImageData.DefaultDpiY,
PixelFormats.Bgra32, null, pixels, width * 4);
return new BitmapSourceDecoder (bitmap);
}
}
void LzUnpack (Stream input, byte[] output)
{
using (var bits = new MsbBitStream (input, true))
{
int dst = 0;
while (dst < output.Length)
{
int ctl = bits.GetNextBit();
if (-1 == ctl)
break;
if (0 == ctl)
{
output[dst++] = (byte)bits.GetBits (8);
}
else
{
int offset = bits.GetBits (8);
int count = bits.GetBits (8);
if (offset <= 0)
break;
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
}
}
}
}
}
}