diff --git a/Legacy/Legacy.csproj b/Legacy/Legacy.csproj index 99d13929..06c09e6e 100644 --- a/Legacy/Legacy.csproj +++ b/Legacy/Legacy.csproj @@ -44,6 +44,7 @@ + @@ -67,6 +68,7 @@ + diff --git a/Legacy/Melody/ImageMGO.cs b/Legacy/Melody/ImageMGO.cs new file mode 100644 index 00000000..db951412 --- /dev/null +++ b/Legacy/Melody/ImageMGO.cs @@ -0,0 +1,153 @@ +//! \file ImageMGO.cs +//! \date 2017 Dec 31 +//! \brief Melody compressed image. +// +// Copyright (C) 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.Windows.Media.Imaging; +using GameRes.Compression; + +namespace GameRes.Formats.Melody +{ + internal class MgoMetaData : ImageMetaData + { + public int UnpackedSize; + public int BmpOffset; + } + + [Export(typeof(ImageFormat))] + public class MgoFormat : ImageFormat + { + public override string Tag { get { return "MGO"; } } + public override string Description { get { return "Melody compressed bitmap"; } } + public override uint Signature { get { return 0x424F474D; } } // 'MGOB' + + public override ImageMetaData ReadMetaData (IBinaryStream file) + { + var header = file.ReadHeader (12); + if (header.ToInt32 (4) != 5) + return null; + using (var lzss = new PackedStream (file.AsStream, true)) + using (var stream = new SeekableStream (lzss)) + using (var mgo = new BinaryStream (stream, file.Name)) + { + var name = mgo.ReadCString(); + mgo.Position = ((int)(mgo.Position - 1) & ~3) + 4; + int count = mgo.ReadInt32(); + mgo.Seek (count * 0x10, SeekOrigin.Current); + int bmp_position = (int)mgo.Position; + var bmp_header = mgo.ReadBytes (0x36); + if (!bmp_header.AsciiEqual ("BM")) + return null; + return new MgoMetaData { + Width = bmp_header.ToUInt32 (0x12), + Height = bmp_header.ToUInt32 (0x16), + BPP = bmp_header.ToInt32 (0x1C), + UnpackedSize = header.ToInt32 (8), + BmpOffset = bmp_position, + }; + } + } + + public override ImageData Read (IBinaryStream file, ImageMetaData info) + { + var meta = (MgoMetaData)info; + file.Position = 12; + using (var lzss = new PackedStream (file.AsStream, true)) + { + var header = new byte[meta.BmpOffset]; + lzss.Read (header, 0, header.Length); + var decoder = new BmpBitmapDecoder (lzss, + BitmapCreateOptions.None, BitmapCacheOption.OnLoad); + var frame = decoder.Frames[0]; + frame.Freeze(); + return new ImageData (frame, info); + } + } + + public override void Write (Stream file, ImageData image) + { + throw new System.NotImplementedException ("MgoFormat.Write not implemented"); + } + } + + internal class LzssDecompressor : Decompressor + { + LsbBitStream m_input; + + public override void Initialize (Stream input) + { + m_input = new LsbBitStream (input, true); + } + + protected override IEnumerator Unpack () + { + byte[] frame = new byte[0x1000]; + int frame_pos = 1; + for (;;) + { + int ctl = m_input.GetNextBit(); + if (-1 == ctl) + yield break; + if (ctl != 0) + { + byte v = (byte)m_input.GetBits (8); + m_buffer[m_pos++] = frame[frame_pos++ & 0xFFF] = v; + if (0 == --m_length) + yield return m_pos; + } + else + { + int offset = m_input.GetBits (12); + if (-1 == offset) + yield break; + int count = m_input.GetBits (4) + 2; + while (count --> 0) + { + byte v = frame[offset++ & 0xFFF]; + m_buffer[m_pos++] = frame[frame_pos++ & 0xFFF] = v; + if (0 == --m_length) + yield return m_pos; + } + } + } + } + + #region IDisposable Members + bool m_disposed = false; + protected override void Dispose (bool disposing) + { + if (!m_disposed) + { + base.Dispose (disposing); + if (disposing && m_input != null) + m_input.Dispose(); + m_disposed = true; + } + } + #endregion + } +}