//! \file ArcMGR.cs //! \date Sat Nov 21 02:05:59 2015 //! \brief Propeller multi-frame image. // // Copyright (C) 2015 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 GameRes.Utility; namespace GameRes.Formats.Propeller { [Export(typeof(ArchiveFormat))] public class MgrOpener : ArchiveFormat { public override string Tag { get { return "MGR"; } } public override string Description { get { return "Propeller multi-frame image"; } } 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) { if (!file.Name.HasExtension (".mgr")) return null; int count = file.View.ReadInt16 (0); if (count <= 0 || count >= 0x100) return null; uint current = 2; uint first_offset = current; if (count > 1) { first_offset = file.View.ReadUInt32 (current); if (first_offset != 2 + count * 4) return null; } if (!file.View.AsciiEqual (first_offset+9, "BM")) return null; string base_name = Path.GetFileNameWithoutExtension (file.Name); var dir = new List<Entry> (count); if (count > 1) { for (int i = 0; i < count; ++i) { var entry = new PackedEntry { Name = string.Format ("{0}#{1:D4}.bmp", base_name, i), Type = "image", Offset = file.View.ReadUInt32 (current), }; if (entry.Offset < first_offset || entry.Offset >= file.MaxOffset) return null; dir.Add (entry); current += 4; } } else { dir.Add (new PackedEntry { Name = base_name+".bmp", Type = "image", Offset = current }); } foreach (PackedEntry entry in dir) { entry.UnpackedSize = file.View.ReadUInt32 (entry.Offset); entry.Size = file.View.ReadUInt32 (entry.Offset+4); entry.IsPacked = true; if (entry.UnpackedSize < 0x36 || entry.Size > file.MaxOffset-entry.Offset) return null; entry.Offset += 8; } return new ArcFile (file, this, dir); } public override Stream OpenEntry (ArcFile arc, Entry entry) { using (var input = arc.File.CreateStream (entry.Offset, entry.Size)) { var bmp = new byte[(entry as PackedEntry).UnpackedSize]; Decompress (input, bmp); return new BinMemoryStream (bmp, entry.Name); } } static public int Decompress (Stream input, byte[] output) { int dst = 0; while (dst < output.Length) { int count = input.ReadByte(); if (-1 == count) break; if (count < 0x20) { count = Math.Min (count+1, output.Length-dst); int read = input.Read (output, dst, count); dst += read; if (read < count) break; } else { int offset = ((count & 0x1F) << 8) + 1; count >>= 5; if (7 == count) count += input.ReadByte(); offset += input.ReadByte(); if (offset >= dst) throw new InvalidFormatException(); count = Math.Min (count+2, output.Length-dst); Binary.CopyOverlapped (output, dst - offset, dst, count); dst += count; } } return dst; } } }