//! \file ImageYP.cs //! \date 2017 Dec 10 //! \brief DarkNiteSystem image format. // // 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.ComponentModel.Composition; using System.IO; using GameRes.Utility; namespace GameRes.Formats.DarkNiteSystem { internal class YpMetaData : ImageMetaData { public int UnpackedSize; } /// <summary> /// Marble YB image format predecessor. /// </summary> [Export(typeof(ImageFormat))] public class YpFormat : ImageFormat { public override string Tag { get { return "PRS/YP"; } } public override string Description { get { return "DarkNiteSystem image format"; } } public override uint Signature { get { return 0; } } public override ImageMetaData ReadMetaData (IBinaryStream file) { var header = file.ReadHeader (8); if (!header.AsciiEqual ("YP")) return null; int unpacked_size = header.ToInt24 (2); int packed_size = header.ToInt24 (5); var data = LzUnpack (file, 0x36); using (var bmp = new BinMemoryStream (data, file.Name)) { var info = Bmp.ReadMetaData (bmp); if (null == info) return info; return new YpMetaData { Width = info.Width, Height = info.Height, BPP = info.BPP, UnpackedSize = unpacked_size, }; } } public override ImageData Read (IBinaryStream file, ImageMetaData info) { var meta = (YpMetaData)info; file.Position = 8; var data = LzUnpack (file, meta.UnpackedSize); using (var bmp = new BinMemoryStream (data, file.Name)) return Bmp.Read (bmp, info); } public override void Write (Stream file, ImageData image) { throw new System.NotImplementedException ("YpFormat.Write not implemented"); } byte[] LzUnpack (IBinaryStream input, int unpacked_size) { var output = new byte[unpacked_size]; var frame = new byte[0x4000]; int dst = 0; int ctl_bits = 0; byte ctl_mask = 0; int frame_pos = 0; while (dst < unpacked_size) { if (0 == ctl_mask) { ctl_bits = input.ReadByte(); if (-1 == ctl_bits) break; ctl_mask = 0x80; } if (0 != (ctl_bits & ctl_mask)) { byte lo = input.ReadUInt8(); byte hi = input.ReadUInt8(); int count = Math.Min (CountTable[lo & 0xF], unpacked_size - dst); int offset = hi << 4 | lo >> 4; int src = frame_pos - offset; for (int i = 0; i < count; ++i) { byte v = frame[src++ & 0x3FFF]; output[dst++] = v; frame[frame_pos++ & 0x3FFF] = v; } } else { byte v = input.ReadUInt8(); output[dst++] = v; frame[frame_pos++ & 0x3FFF] = v; } ctl_mask >>= 1; } return output; } static readonly byte[] CountTable = { 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xE, 0x10, 0x18, 0x20, 0x40, 0x80 }; } }