mirror of
https://github.com/crskycode/GARbro.git
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685 lines
24 KiB
C#
685 lines
24 KiB
C#
//! \file ImageRCT.cs
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//! \date Fri Aug 01 11:36:31 2014
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//! \brief RCT image format implementation.
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//
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// Copyright (C) 2014-2017 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.IO;
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using System.Linq;
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using System.Text;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Diagnostics;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Formats.Properties;
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using GameRes.Formats.Strings;
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using GameRes.Utility;
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namespace GameRes.Formats.Majiro
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{
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internal class RctMetaData : ImageMetaData
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{
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public int Version;
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public bool IsEncrypted;
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public uint DataOffset;
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public int DataSize;
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public int BaseNameLength;
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public int BaseRecursionDepth;
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}
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internal class RctOptions : ResourceOptions
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{
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public string Password;
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}
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[Serializable]
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public class RctScheme : ResourceScheme
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{
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public Dictionary<string, string> KnownKeys;
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}
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[Export(typeof(ImageFormat))]
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public class RctFormat : ImageFormat
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{
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public override string Tag { get { return "RCT"; } }
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public override string Description { get { return "Majiro game engine RGB image format"; } }
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public override uint Signature { get { return 0x9a925a98; } }
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public override bool CanWrite { get { return true; } }
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public bool OverlayFrames = true;
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public bool ApplyMask = true;
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public const int BaseRecursionLimit = 8;
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public static Dictionary<string, string> KnownKeys = new Dictionary<string, string>();
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public override ResourceScheme Scheme
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{
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get { return new RctScheme { KnownKeys = KnownKeys }; }
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set { KnownKeys = ((RctScheme)value).KnownKeys; }
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}
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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stream.Position = 4;
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int id = stream.ReadByte();
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if (0x54 != id)
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return null;
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int encryption = stream.ReadByte();
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if (encryption != 0x43 && encryption != 0x53)
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return null;
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bool is_encrypted = 0x53 == encryption;
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int version = stream.ReadByte();
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if (0x30 != version)
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return null;
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version = stream.ReadByte() - 0x30;
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if (version != 0 && version != 1)
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return null;
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uint width = stream.ReadUInt32();
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uint height = stream.ReadUInt32();
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int data_size = stream.ReadInt32();
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int additional_size = 0;
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if (1 == version)
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{
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additional_size = stream.ReadUInt16();
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}
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if (width > 0x8000 || height > 0x8000)
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return null;
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return new RctMetaData
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{
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Width = width,
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Height = height,
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OffsetX = 0,
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OffsetY = 0,
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BPP = 24,
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Version = version,
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IsEncrypted = is_encrypted,
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DataOffset = (uint)stream.Position,
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DataSize = data_size,
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BaseNameLength = additional_size,
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};
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}
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byte[] Key = null;
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var meta = (RctMetaData)info;
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var pixels = ReadPixelsData (file, meta);
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if (ApplyMask)
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{
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var base_name = Path.GetFileNameWithoutExtension (meta.FileName);
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var mask_name = base_name + "_.rc8";
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mask_name = VFS.CombinePath (VFS.GetDirectoryName (meta.FileName), mask_name);
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if (VFS.FileExists (mask_name))
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{
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try
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{
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return ApplyMaskToImage (meta, pixels, mask_name);
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}
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catch { /* ignore mask read errors */ }
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}
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}
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return ImageData.Create (meta, PixelFormats.Bgr24, null, pixels, (int)meta.Width*3);
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}
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static readonly ResourceInstance<ImageFormat> s_rc8_format = new ResourceInstance<ImageFormat> ("RC8");
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ImageData ApplyMaskToImage (RctMetaData info, byte[] image, string mask_name)
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{
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using (var mask_file = VFS.OpenBinaryStream (mask_name))
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{
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var mask_info = s_rc8_format.Value.ReadMetaData (mask_file);
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if (null == mask_info
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|| info.Width != mask_info.Width || info.Height != mask_info.Height)
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throw new InvalidFormatException();
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using (var reader = new Rc8Format.Reader (mask_file, mask_info))
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{
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reader.Unpack();
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var palette = reader.Palette;
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int dst_stride = (int)info.Width * 4;
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var pixels = new byte[dst_stride * (int)info.Height];
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var alpha = reader.Data;
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int a_src = 0;
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int src = 0;
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for (int dst = 0; dst < pixels.Length; dst += 4)
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{
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pixels[dst ] = image[src++];
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pixels[dst+1] = image[src++];
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pixels[dst+2] = image[src++];
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var color = palette[alpha[a_src++]];
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pixels[dst+3] = (byte)~((color.B + color.G + color.R) / 3);
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}
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return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_stride);
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}
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}
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}
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byte[] CombineImage (byte[] base_image, byte[] overlay)
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{
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for (int i = 2; i < base_image.Length; i += 3)
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{
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if (0 == overlay[i-2] && 0 == overlay[i-1] && 0xff == overlay[i])
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{
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overlay[i-2] = base_image[i-2];
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overlay[i-1] = base_image[i-1];
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overlay[i] = base_image[i];
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}
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}
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return overlay;
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}
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byte[] ReadPixelsData (IBinaryStream file, RctMetaData meta)
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{
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byte[] base_image = null;
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if (meta.FileName != null && meta.BaseNameLength > 0 && OverlayFrames
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&& meta.BaseRecursionDepth < BaseRecursionLimit)
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base_image = ReadBaseImage (file, meta);
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file.Position = meta.DataOffset + meta.BaseNameLength;
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if (meta.IsEncrypted)
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file = OpenEncryptedStream (file, meta.DataSize);
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try
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{
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using (var reader = new Reader (file, meta))
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{
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reader.Unpack();
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if (base_image != null)
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return CombineImage (base_image, reader.Data);
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return reader.Data;
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}
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}
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catch
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{
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if (meta.IsEncrypted)
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Key = null; // probably incorrect encryption scheme caused exception, reset key
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throw;
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}
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}
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byte[] ReadBaseImage (IBinaryStream file, RctMetaData meta)
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{
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try
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{
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file.Position = meta.DataOffset;
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var name = file.ReadCString (meta.BaseNameLength);
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string dir_name = VFS.GetDirectoryName (meta.FileName);
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name = VFS.CombinePath (dir_name, name);
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if (VFS.FileExists (name))
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{
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using (var base_file = VFS.OpenBinaryStream (name))
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{
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var base_info = ReadMetaData (base_file) as RctMetaData;
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if (null != base_info
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&& meta.Width == base_info.Width && meta.Height == base_info.Height)
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{
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base_info.BaseRecursionDepth = meta.BaseRecursionDepth + 1;
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base_info.FileName = name;
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return ReadPixelsData (base_file, base_info);
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}
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}
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}
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}
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catch { /* ignore baseline image read errors */ }
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return null;
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}
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IBinaryStream OpenEncryptedStream (IBinaryStream file, int data_size)
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{
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if (null == Key)
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{
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var password = QueryPassword();
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if (string.IsNullOrEmpty (password))
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throw new UnknownEncryptionScheme();
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Key = InitDecryptionKey (password);
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}
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byte[] data = file.ReadBytes (data_size);
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if (data.Length != data_size)
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throw new EndOfStreamException();
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for (int i = 0; i < data.Length; ++i)
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{
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data[i] ^= Key[i & 0x3FF];
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}
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return new BinMemoryStream (data, file.Name);
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}
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private byte[] InitDecryptionKey (string password)
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{
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byte[] bin_pass = Encodings.cp932.GetBytes (password);
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uint crc32 = Crc32.Compute (bin_pass, 0, bin_pass.Length);
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byte[] key_table = new byte[0x400];
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unsafe
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{
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fixed (byte* key_ptr = key_table)
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{
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uint* key32 = (uint*)key_ptr;
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for (int i = 0; i < 0x100; ++i)
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*key32++ = crc32 ^ Crc32.Table[(i + crc32) & 0xFF];
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}
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}
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return key_table;
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}
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private string QueryPassword ()
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{
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if (VFS.IsVirtual)
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{
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var password = FindImageKey();
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if (!string.IsNullOrEmpty (password))
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return password;
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}
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var options = Query<RctOptions> (arcStrings.ArcImageEncrypted);
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return options.Password;
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}
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static readonly ResourceInstance<ArchiveFormat> s_Majiro = new ResourceInstance<ArchiveFormat> ("MAJIRO");
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private string FindImageKey ()
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{
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var arc_fs = VFS.Top as ArchiveFileSystem;
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if (null == arc_fs)
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return null;
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try
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{
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// look for "start.mjo" within "scenario.arc" archive
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var src_name = arc_fs.Source.File.Name;
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var scenario_arc_name = Path.Combine (Path.GetDirectoryName (src_name), "scenario.arc");
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if (!File.Exists (scenario_arc_name))
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return null;
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byte[] script;
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using (var file = new ArcView (scenario_arc_name))
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using (var arc = s_Majiro.Value.TryOpen (file))
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{
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if (null == arc)
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return null;
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var start_mjo = arc.Dir.First (e => e.Name == "start.mjo");
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using (var mjo = arc.OpenEntry (start_mjo))
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{
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script = new byte[mjo.Length];
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mjo.Read (script, 0, script.Length);
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}
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}
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if (Binary.AsciiEqual (script, "MajiroObjX1.000"))
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DecryptMjo (script);
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else if (!Binary.AsciiEqual (script, "MjPlainBytecode"))
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return null;
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// locate key within start.mjo script
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int n = script.ToInt32 (0x18);
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for (int offset = 0x20 + n * 8; offset < script.Length - 4; ++offset)
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{
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offset = Array.IndexOf<byte> (script, 1, offset);
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if (-1 == offset)
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break;
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if (8 != script[offset+1])
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continue;
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int str_length = script.ToUInt16 (offset+2);
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if (0 == str_length || str_length + 12 > script.Length - offset
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|| 0x0835 != script.ToUInt16 (offset+str_length+4)
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|| 0x7A7B6ED4 != script.ToUInt32 (offset+str_length+6))
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continue;
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offset += 4;
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int end = Array.IndexOf<byte> (script, 0, offset, str_length);
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if (-1 != end)
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str_length = end - offset;
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var password = Encodings.cp932.GetString (script, offset, str_length);
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Trace.WriteLine (string.Format ("Found key in start.mjo [{0}]", password), "[RCT]");
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return password;
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}
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}
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catch { /* ignore errors */ }
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return null;
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}
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private void DecryptMjo (byte[] data)
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{
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int offset = 0x1C + 8 * data.ToInt32 (0x18);
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if (offset < 0x1C || offset >= data.Length - 4)
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return;
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int count = data.ToInt32 (offset);
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offset += 4;
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if (count <= 0 || count > data.Length - offset)
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return;
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Debug.Assert (Crc32.Table.Length == 0x100);
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unsafe
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{
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fixed (uint* table = Crc32.Table)
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{
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byte* key = (byte*)table;
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for (int i = 0; i < count; ++i)
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data[offset+i] ^= key[i & 0x3FF];
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}
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}
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new RctOptions { Password = Settings.Default.RCTPassword };
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}
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public override ResourceOptions GetOptions (object widget)
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{
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var w = widget as GUI.WidgetRCT;
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if (null != w)
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Settings.Default.RCTPassword = w.Password.Text;
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return GetDefaultOptions();
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetRCT();
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}
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public override void Write (Stream file, ImageData image)
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{
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using (var writer = new Writer (file))
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writer.Pack (image.Bitmap);
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}
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internal class Writer : IDisposable
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{
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BinaryWriter m_out;
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uint[] m_input;
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int m_width;
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int m_height;
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int[] m_shift_table = new int[32];
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const int MaxThunkSize = 0xffff + 0x7f;
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const int MaxMatchSize = 0xffff;
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struct ChunkPosition
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{
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public ushort Offset;
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public ushort Length;
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}
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public Writer (Stream output)
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{
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m_out = new BinaryWriter (output, Encoding.ASCII, true);
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}
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void PrepareInput (BitmapSource bitmap)
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{
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m_width = bitmap.PixelWidth;
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m_height = bitmap.PixelHeight;
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int pixels = m_width*m_height;
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m_input = new uint[pixels];
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if (bitmap.Format != PixelFormats.Bgr32)
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{
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var converted_bitmap = new FormatConvertedBitmap();
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converted_bitmap.BeginInit();
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converted_bitmap.Source = bitmap;
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converted_bitmap.DestinationFormat = PixelFormats.Bgr32;
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converted_bitmap.EndInit();
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bitmap = converted_bitmap;
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}
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unsafe
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{
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fixed (uint* buffer = m_input)
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{
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bitmap.CopyPixels (Int32Rect.Empty, (IntPtr)buffer, pixels*4, m_width*4);
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}
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}
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InitShiftTable (m_width);
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}
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void InitShiftTable (int width)
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{
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for (int i = 0; i < 32; ++i)
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{
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int shift = Reader.ShiftTable[i];
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int shift_row = shift & 0x0f;
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shift >>= 4;
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shift_row *= width;
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shift -= shift_row;
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m_shift_table[i] = shift;
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}
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}
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List<byte> m_buffer = new List<byte>();
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int m_buffer_size;
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public void Pack (BitmapSource bitmap)
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{
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PrepareInput (bitmap);
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long data_offset = 0x14;
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m_out.BaseStream.Position = data_offset;
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uint pixel = m_input[0];
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m_out.Write ((byte)pixel);
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m_out.Write ((byte)(pixel >> 8));
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m_out.Write ((byte)(pixel >> 16));
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m_buffer.Clear();
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m_buffer_size = 0;
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int last = m_input.Length;
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int current = 1;
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while (current != last)
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{
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var chunk_pos = FindLongest (current, last);
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if (chunk_pos.Length > 0)
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{
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Flush();
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WritePos (chunk_pos);
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current += chunk_pos.Length;
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}
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else
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{
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WritePixel (m_input[current++]);
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}
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}
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Flush();
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var data_size = m_out.BaseStream.Position - data_offset;
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m_out.BaseStream.Position = 0;
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WriteHeader ((uint)data_size);
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}
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void WriteHeader (uint data_size)
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{
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m_out.Write (0x9a925a98u);
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m_out.Write (0x30304354u);
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m_out.Write (m_width);
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m_out.Write (m_height);
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m_out.Write (data_size);
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}
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void WritePixel (uint pixel)
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{
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if (MaxThunkSize == m_buffer_size)
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Flush();
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m_buffer.Add ((byte)pixel);
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m_buffer.Add ((byte)(pixel >> 8));
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m_buffer.Add ((byte)(pixel >> 16));
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++m_buffer_size;
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}
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void Flush ()
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{
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if (0 != m_buffer.Count)
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{
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if (m_buffer_size > 0x7f)
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{
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m_out.Write ((byte)0x7f);
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m_out.Write ((ushort)(m_buffer_size-0x80));
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}
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else
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m_out.Write ((byte)(m_buffer_size-1));
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foreach (var b in m_buffer)
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m_out.Write (b);
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m_buffer.Clear();
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m_buffer_size = 0;
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|
}
|
|
}
|
|
|
|
ChunkPosition FindLongest (int buf_begin, int buf_end)
|
|
{
|
|
buf_end = Math.Min (buf_begin + MaxMatchSize, buf_end);
|
|
ChunkPosition pos = new ChunkPosition { Offset = 0, Length = 0 };
|
|
for (int i = 0; i < 32; ++i)
|
|
{
|
|
int offset = buf_begin + m_shift_table[i];
|
|
if (offset < 0)
|
|
continue;
|
|
if (m_input[offset] != m_input[buf_begin])
|
|
continue;
|
|
var last = Mismatch (buf_begin+1, buf_end, offset+1);
|
|
int weight = last - offset;
|
|
if (weight > pos.Length)
|
|
{
|
|
pos.Offset = (ushort)i;
|
|
pos.Length = (ushort)weight;
|
|
}
|
|
}
|
|
return pos;
|
|
}
|
|
|
|
int Mismatch (int first1, int last1, int first2)
|
|
{
|
|
while (first1 != last1 && m_input[first1] == m_input[first2])
|
|
{
|
|
++first1;
|
|
++first2;
|
|
}
|
|
return first2;
|
|
}
|
|
|
|
void WritePos (ChunkPosition pos)
|
|
{
|
|
int code = (pos.Offset << 2) | 0x80;
|
|
if (pos.Length > 3)
|
|
code |= 3;
|
|
else
|
|
code |= pos.Length - 1;
|
|
m_out.Write ((byte)code);
|
|
if (pos.Length > 3)
|
|
m_out.Write ((ushort)(pos.Length - 4));
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
m_out.Dispose();
|
|
}
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
internal sealed class Reader : IDisposable
|
|
{
|
|
private IBinaryStream m_input;
|
|
private uint m_width;
|
|
private byte[] m_data;
|
|
|
|
public byte[] Data { get { return m_data; } }
|
|
|
|
public Reader (IBinaryStream file, RctMetaData info)
|
|
{
|
|
m_width = info.Width;
|
|
m_data = new byte[m_width * info.Height * 3];
|
|
m_input = file;
|
|
}
|
|
|
|
internal static readonly sbyte[] ShiftTable = new sbyte[] {
|
|
-16, -32, -48, -64, -80, -96,
|
|
49, 33, 17, 1, -15, -31, -47,
|
|
50, 34, 18, 2, -14, -30, -46,
|
|
51, 35, 19, 3, -13, -29, -45,
|
|
36, 20, 4, -12, -28,
|
|
};
|
|
|
|
public void Unpack ()
|
|
{
|
|
int pixels_remaining = m_data.Length;
|
|
int data_pos = 0;
|
|
int eax = 0;
|
|
while (pixels_remaining > 0)
|
|
{
|
|
int count = eax*3 + 3;
|
|
if (count > pixels_remaining)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
if (count != m_input.Read (m_data, data_pos, count))
|
|
throw new InvalidFormatException();
|
|
data_pos += count;
|
|
|
|
while (pixels_remaining > 0)
|
|
{
|
|
eax = m_input.ReadByte();
|
|
if (0 == (eax & 0x80))
|
|
{
|
|
if (0x7f == eax)
|
|
eax += m_input.ReadUInt16();
|
|
break;
|
|
}
|
|
int shift_index = eax >> 2;
|
|
eax &= 3;
|
|
if (3 == eax)
|
|
eax += m_input.ReadUInt16();
|
|
|
|
count = eax*3 + 3;
|
|
if (pixels_remaining < count)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
int shift = ShiftTable[shift_index & 0x1f];
|
|
int shift_row = shift & 0x0f;
|
|
shift >>= 4;
|
|
shift_row *= (int)m_width;
|
|
shift -= shift_row;
|
|
shift *= 3;
|
|
if (shift >= 0 || data_pos+shift < 0)
|
|
throw new InvalidFormatException();
|
|
Binary.CopyOverlapped (m_data, data_pos+shift, data_pos, count);
|
|
data_pos += count;
|
|
}
|
|
}
|
|
}
|
|
|
|
#region IDisposable Members
|
|
public void Dispose ()
|
|
{
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
}
|