mirror of
https://github.com/crskycode/GARbro.git
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251 lines
9.3 KiB
C#
251 lines
9.3 KiB
C#
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//! \file ImageDCF.cs
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//! \date Fri Jul 29 14:07:15 2016
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//! \brief AliceSoft incremental image format.
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//
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// Copyright (C) 2016 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.ComponentModel.Composition;
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using System.Diagnostics;
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using System.IO;
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using System.Windows.Media;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.AliceSoft
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{
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internal class DcfMetaData : ImageMetaData
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{
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public string BaseName;
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public long DataOffset;
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}
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[Export(typeof(ImageFormat))]
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public class DcfFormat : ImageFormat
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{
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public override string Tag { get { return "DCF"; } }
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public override string Description { get { return "AliceSoft System incremental image"; } }
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public override uint Signature { get { return 0x20666364; } } // 'dcf '
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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using (var reader = new ArcView.Reader (stream))
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{
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stream.Seek (4, SeekOrigin.Current);
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uint header_size = reader.ReadUInt32();
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long data_pos = stream.Position + header_size;
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if (reader.ReadInt32() != 1)
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return null;
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uint width = reader.ReadUInt32();
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uint height = reader.ReadUInt32();
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int bpp = reader.ReadInt32();
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int name_length = reader.ReadInt32();
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if (name_length <= 0)
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return null;
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int shift = (name_length % 7) + 1;
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var name_bits = reader.ReadBytes (name_length);
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for (int i = 0; i < name_length; ++i)
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{
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name_bits[i] = Binary.RotByteL (name_bits[i], shift);
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}
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return new DcfMetaData
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{
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Width = width,
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Height = height,
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BPP = bpp,
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BaseName = Encodings.cp932.GetString (name_bits),
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DataOffset = data_pos,
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};
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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using (var reader = new DcfReader (stream, (DcfMetaData)info))
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{
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Data, reader.Stride);
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}
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("DcfFormat.Write not implemented");
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}
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}
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internal class DcfReader : IDisposable
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{
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BinaryReader m_input;
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DcfMetaData m_info;
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byte[] m_output;
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byte[] m_mask = null;
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byte[] m_base = null;
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int m_overlay_bpp;
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int m_base_bpp;
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static readonly Lazy<ImageFormat> s_QntFormat = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("QNT"));
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internal ImageFormat Qnt { get { return s_QntFormat.Value; } }
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public byte[] Data { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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public int Stride { get; private set; }
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public DcfReader (Stream input, DcfMetaData info)
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{
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m_input = new ArcView.Reader (input);
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m_info = info;
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}
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public void Unpack ()
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{
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long next_pos = m_info.DataOffset;
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for (;;)
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{
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m_input.BaseStream.Position = next_pos;
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uint id = m_input.ReadUInt32();
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next_pos += 8 + m_input.ReadUInt32();
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if (0x6C646664 == id) // 'dfdl'
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{
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int unpacked_size = m_input.ReadInt32();
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if (unpacked_size <= 0)
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continue;
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m_mask = new byte[unpacked_size];
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using (var input = new ZLibStream (m_input.BaseStream, CompressionMode.Decompress, true))
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input.Read (m_mask, 0, unpacked_size);
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}
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else if (0x64676364 == id) // 'dcgd'
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break;
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}
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long qnt_pos = m_input.BaseStream.Position;
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if (m_input.ReadUInt32() != Qnt.Signature)
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throw new InvalidFormatException();
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m_input.BaseStream.Seek (-4, SeekOrigin.Current);
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var qnt_info = Qnt.ReadMetaData (m_input.BaseStream) as QntMetaData;
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if (null == qnt_info)
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throw new InvalidFormatException();
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m_input.BaseStream.Position = qnt_pos + 0x44;
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var overlay = new QntFormat.Reader (m_input.BaseStream, qnt_info);
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overlay.Unpack();
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m_overlay_bpp = overlay.BPP;
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if (m_mask != null)
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ReadBaseImage();
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if (m_base != null)
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{
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m_output = ApplyOverlay (overlay.Data);
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SetFormat ((int)m_info.Width, m_base_bpp);
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}
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else
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{
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m_output = overlay.Data;
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SetFormat ((int)qnt_info.Width, m_overlay_bpp);
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}
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}
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void SetFormat (int width, int bpp)
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{
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Format = 24 == bpp ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
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Stride = width * (bpp / 8);
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}
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byte[] ApplyOverlay (byte[] overlay)
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{
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int blocks_x = (int)m_info.Width / 0x10;
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int blocks_y = (int)m_info.Height / 0x10;
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int base_step = m_base_bpp / 8;
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int overlay_step = m_overlay_bpp / 8;
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int base_stride = (int)m_info.Width * base_step;
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int overlay_stride = (int)m_info.Width * overlay_step;
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int mask_pos = 4;
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for (int y = 0; y < blocks_y; ++y)
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{
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int base_pos = y * 0x10 * base_stride;
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int src_pos = y * 0x10 * overlay_stride;
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for (int x = 0; x < blocks_x; ++x)
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{
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if (0 != m_mask[mask_pos++])
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continue;
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for (int by = 0; by < 0x10; ++by)
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{
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int dst = base_pos + by * base_stride + x * 0x10 * base_step;
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int src = src_pos + by * overlay_stride + x * 0x10 * overlay_step;
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for (int bx = 0; bx < 0x10; ++bx)
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{
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m_base[dst ] = overlay[src ];
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m_base[dst+1] = overlay[src+1];
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m_base[dst+2] = overlay[src+2];
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if (4 == base_step)
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{
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m_base[dst+3] = 4 == overlay_step ? overlay[src+3] : (byte)0xFF;
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}
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dst += base_step;
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src += overlay_step;
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}
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}
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}
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}
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return m_base;
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}
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void ReadBaseImage ()
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{
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try
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{
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string dir_name = VFS.GetDirectoryName (m_info.FileName);
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string base_name = Path.ChangeExtension (m_info.BaseName, "qnt");
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base_name = VFS.CombinePath (dir_name, base_name);
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using (var base_file = VFS.OpenSeekableStream (base_name))
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{
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var base_info = Qnt.ReadMetaData (base_file) as QntMetaData;
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if (null != base_info && m_info.Width == base_info.Width && m_info.Height == base_info.Height)
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{
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base_info.FileName = base_name;
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var reader = new QntFormat.Reader (base_file, base_info);
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reader.Unpack();
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m_base_bpp = reader.BPP;
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m_base = reader.Data;
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}
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}
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}
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catch (Exception X)
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{
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Trace.WriteLine (X.Message, "[DCF]");
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}
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}
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#region IDisposable Members
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bool _disposed = false;
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public void Dispose ()
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{
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if (!_disposed)
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{
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m_input.Dispose();
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_disposed = true;
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}
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}
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#endregion
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}
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}
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