mirror of
https://github.com/crskycode/GARbro.git
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146 lines
5.5 KiB
C#
146 lines
5.5 KiB
C#
//! \file ArcVCT.cs
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//! \date 2018 Feb 17
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//! \brief Unison Shift resource archive.
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//
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// Copyright (C) 2018 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Utility;
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// [000225][Unison Shift] Moe ~Moegiiro no Machi~
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namespace GameRes.Formats.Unison
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{
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[Export(typeof(ArchiveFormat))]
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public class VctOpener : ArchiveFormat
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{
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public override string Tag { get { return "VCT"; } }
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public override string Description { get { return "Unison Shift resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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int idx_count = file.View.ReadByte (0);
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if (0 == idx_count)
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return null;
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int index_offset = 1 + idx_count * 3;
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int count = file.View.ReadInt32 (index_offset);
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if (!IsSaneCount (count))
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return null;
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index_offset += 4;
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uint index_size = (uint)count * 0x20;
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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string name = file.View.ReadString (index_offset, 0x14).TrimEnd();
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string ext = file.View.ReadString (index_offset+0x14, 3);
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if (!string.IsNullOrWhiteSpace (ext))
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name += '.' + ext;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = file.View.ReadUInt32 (index_offset+0x18);
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entry.Size = file.View.ReadUInt32 (index_offset+0x1C);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 0x20;
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}
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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if (!arc.File.View.AsciiEqual (entry.Offset, "LZS\0"))
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return base.OpenEntry (arc, entry);
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using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
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{
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var data = LzsUnpack (input);
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if (data.AsciiEqual ("BM") && 32 == data.ToUInt16 (0x1C))
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FixBitmapAlpha (data);
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return new BinMemoryStream (data, entry.Name);
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}
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}
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byte[] LzsUnpack (IBinaryStream input)
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{
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input.ReadInt32();
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int unpacked_size = input.ReadInt32();
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int packed_size = input.ReadInt32();
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int ctl_size = input.ReadInt32();
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var ctl = input.ReadBytes (ctl_size);
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var output = new byte[unpacked_size];
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var frame = new byte[0x1000];
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int frame_pos = 1;
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int src = 0;
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int dst = 0;
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int bits = 2;
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while (dst < unpacked_size)
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{
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bits >>= 1;
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if (1 == bits)
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{
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bits = ctl[src++] | 0x100;
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}
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if (0 != (bits & 1))
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{
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output[dst++] = frame[frame_pos++ & 0xFFF] = input.ReadUInt8();
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}
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else
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{
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int offset = input.ReadUInt16();
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int count = (offset >> 12) + 2;
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while (count --> 0)
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{
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byte b = frame[offset++ & 0xFFF];
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output[dst++] = frame[frame_pos++ & 0xFFF] = b;
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}
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}
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}
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return output;
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}
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void FixBitmapAlpha (byte[] bmp)
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{
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int img_start = bmp.ToInt32 (0xA);
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for (int pos = img_start; pos < bmp.Length; pos += 4)
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{
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byte r = bmp[pos];
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bmp[pos] = bmp[pos+2];
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bmp[pos+2] = r;
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bmp[pos+3] ^= 0xFF;
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}
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if (img_start == 0x42 && bmp.ToInt32 (0x36) == 0xFF && bmp.ToInt32 (0x3E) == 0xFF0000)
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{
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LittleEndian.Pack (0xFF0000, bmp, 0x36);
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LittleEndian.Pack (0x0000FF, bmp, 0x3E);
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}
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}
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}
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}
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