GARbro-mirror/Legacy/Unison/ArcVCT.cs

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//! \file ArcVCT.cs
//! \date 2018 Feb 17
//! \brief Unison Shift 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;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
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using GameRes.Utility;
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// [000225][Unison Shift] Moe ~Moegiiro no Machi~
namespace GameRes.Formats.Unison
{
[Export(typeof(ArchiveFormat))]
public class VctOpener : ArchiveFormat
{
public override string Tag { get { return "VCT"; } }
public override string Description { get { return "Unison Shift resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
int idx_count = file.View.ReadByte (0);
if (0 == idx_count)
return null;
int index_offset = 1 + idx_count * 3;
int count = file.View.ReadInt32 (index_offset);
if (!IsSaneCount (count))
return null;
index_offset += 4;
uint index_size = (uint)count * 0x20;
if (index_size > file.View.Reserve (index_offset, index_size))
return null;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
string name = file.View.ReadString (index_offset, 0x14).TrimEnd();
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if (string.IsNullOrWhiteSpace (name))
return null;
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string ext = file.View.ReadString (index_offset+0x14, 3);
if (!string.IsNullOrWhiteSpace (ext))
name += '.' + ext;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset+0x18);
entry.Size = file.View.ReadUInt32 (index_offset+0x1C);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x20;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!arc.File.View.AsciiEqual (entry.Offset, "LZS\0"))
return base.OpenEntry (arc, entry);
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
{
var data = LzsUnpack (input);
if (data.AsciiEqual ("BM") && 32 == data.ToUInt16 (0x1C))
FixBitmapAlpha (data);
return new BinMemoryStream (data, entry.Name);
}
}
byte[] LzsUnpack (IBinaryStream input)
{
input.ReadInt32();
int unpacked_size = input.ReadInt32();
int packed_size = input.ReadInt32();
int ctl_size = input.ReadInt32();
var ctl = input.ReadBytes (ctl_size);
var output = new byte[unpacked_size];
var frame = new byte[0x1000];
int frame_pos = 1;
int src = 0;
int dst = 0;
int bits = 2;
while (dst < unpacked_size)
{
bits >>= 1;
if (1 == bits)
{
bits = ctl[src++] | 0x100;
}
if (0 != (bits & 1))
{
output[dst++] = frame[frame_pos++ & 0xFFF] = input.ReadUInt8();
}
else
{
int offset = input.ReadUInt16();
int count = (offset >> 12) + 2;
while (count --> 0)
{
byte b = frame[offset++ & 0xFFF];
output[dst++] = frame[frame_pos++ & 0xFFF] = b;
}
}
}
return output;
}
void FixBitmapAlpha (byte[] bmp)
{
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int img_start = bmp.ToInt32 (0xA);
for (int pos = img_start; pos < bmp.Length; pos += 4)
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{
byte r = bmp[pos];
bmp[pos] = bmp[pos+2];
bmp[pos+2] = r;
bmp[pos+3] ^= 0xFF;
}
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if (img_start == 0x42 && bmp.ToInt32 (0x36) == 0xFF && bmp.ToInt32 (0x3E) == 0xFF0000)
{
LittleEndian.Pack (0xFF0000, bmp, 0x36);
LittleEndian.Pack (0x0000FF, bmp, 0x3E);
}
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}
}
}