mirror of
https://github.com/crskycode/GARbro.git
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286 lines
9.4 KiB
C#
286 lines
9.4 KiB
C#
//! \file ImageKGF.cs
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//! \date Thu Dec 22 16:47:04 2016
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//! \brief Cadath 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.IO;
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using System.Windows.Media;
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namespace GameRes.Formats.Cadath
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{
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internal class KgfMetaData : ImageMetaData
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{
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public int Mode;
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}
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[Export(typeof(ImageFormat))]
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public class KgfFormat : ImageFormat
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{
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public override string Tag { get { return "KGF"; } }
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public override string Description { get { return "Cadath image format"; } }
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public override uint Signature { get { return 0x46474B; } } // 'KGF'
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (0x1C);
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return new KgfMetaData
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{
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Width = header.ToUInt32 (4),
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Height = header.ToUInt32 (8),
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BPP = header.ToInt32 (0xC),
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Mode = header.ToInt32 (0x10),
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};
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var decoder = new KgfDecoder (file, (KgfMetaData)info);
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decoder.Unpack();
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return ImageData.Create (info, decoder.Format, null, decoder.Data);
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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 NotImplementedException ("KgfFormat.Write not implemented");
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}
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}
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internal class KgfDecoder
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{
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IBinaryStream m_input;
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byte[] m_output;
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int m_width;
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int m_height;
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int m_pixel_size;
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int m_mode;
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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 KgfDecoder (IBinaryStream input, KgfMetaData info)
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{
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m_input = input;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_mode = info.Mode;
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if (32 == info.BPP)
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Format = PixelFormats.Bgra32;
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else if (24 == info.BPP)
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Format = PixelFormats.Bgr24;
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else
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throw new InvalidFormatException();
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m_pixel_size = info.BPP / 8;
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m_output = new byte[m_width * m_height * m_pixel_size];
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}
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public void Unpack ()
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{
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switch (m_mode)
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{
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case 0: UnpackV0(); break;
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case 1: UnpackV1(); break;
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case 2: UnpackV2(); break;
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case 3: UnpackV3(); break;
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case 4: UnpackV4(); break;
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case 5: UnpackV5(); break;
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default: throw new InvalidFormatException();
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}
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}
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void UnpackV0 ()
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{
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m_input.Position = 0x1C;
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m_input.Read (m_output, 0, m_output.Length);
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}
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void UnpackV1 ()
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{
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m_input.Position = 0x1C;
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var data = m_input.ReadBytes (m_output.Length);
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CopyChannels (data);
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}
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void UnpackV2 ()
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{
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m_input.Position = 0x1C;
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int bits_size = m_input.ReadInt32();
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int ctl_size = m_input.ReadInt32();
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int data_size = m_input.ReadInt32();
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var bits = m_input.ReadBytes (ctl_size);
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int dst = 0;
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var data = new byte[m_output.Length];
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for (int i = 0; i < bits_size; ++i)
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{
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if (0 != (bits[i >> 3] & 1))
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{
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byte v = m_input.ReadUInt8();
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int count = Math.Min (m_input.ReadUInt8() + 3, data.Length - dst);
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for (int j = 0; j < count; ++j)
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{
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data[dst++] = v;
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}
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}
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else
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{
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data[dst++] = m_input.ReadUInt8();
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}
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if (dst >= data.Length)
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break;
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bits[i >> 3] >>= 1;
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}
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CopyChannels (data);
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}
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void UnpackV3 ()
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{
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m_input.Position = 0x24;
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int packed_size = m_input.ReadInt32();
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m_output = Decompress (0x100);
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}
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void UnpackV4 ()
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{
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m_input.Position = 0x24;
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int packed_size = m_input.ReadInt32();
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var data = Decompress (0x100);
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CopyChannels (data);
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}
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void CopyChannels (byte[] data)
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{
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int src = 0;
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for (int i = 0; i < m_pixel_size; ++i)
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for (int dst = i; dst < m_output.Length; dst += m_pixel_size)
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{
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m_output[dst] = data[src++];
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}
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}
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void UnpackV5 ()
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{
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m_input.Position = 0x24;
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int packed_size = m_input.ReadInt32();
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var data = Decompress (0x200);
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var line = new byte[m_width];
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int channel_size = m_width * m_height;
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int src = 0;
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for (int i = 0; i < m_pixel_size; ++i)
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{
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for (int j = 0; j < line.Length; ++j)
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line[j] = 0;
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int dst = i;
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for (int j = 0; j < channel_size; ++j)
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{
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int pos = j % m_width;
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byte b = line[pos];
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b ^= data[src++];
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m_output[dst] = b;
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line[pos] = b;
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dst += m_pixel_size;
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}
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}
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}
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byte[] Decompress (int buffer_size)
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{
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var output = new byte[m_output.Length];
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var buf0 = new InputBuffer (buffer_size);
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var buf1 = new InputBuffer (buffer_size >> 3);
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var bits_buf = new byte[buf1.Length + 1];
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int dst = 0;
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while (dst < output.Length)
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{
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if (0 == buf1.ReadFrom (m_input))
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throw new InvalidFormatException();
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int output_chunk_size;
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if (buf1.Decode (bits_buf, 0, buf1.Length, m_input, out output_chunk_size))
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throw new InvalidFormatException();
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buf0.ReadFrom (bits_buf);
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if (buf0.Decode (output, dst, output.Length - dst, m_input, out output_chunk_size))
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break;
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dst += output_chunk_size;
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}
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return output;
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}
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class InputBuffer
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{
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byte m_last_byte;
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byte[] m_ctl_bits;
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byte[] m_data;
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public int Length { get; private set; }
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public int ByteLength { get { return Length >> 3; } }
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public InputBuffer (int length)
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{
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Length = length;
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m_last_byte = 0;
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m_ctl_bits = new byte[(length >> 3) + 1];
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m_data = new byte[length + 1];
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}
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public int ReadFrom (IBinaryStream input)
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{
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return input.Read (m_ctl_bits, 0, ByteLength);
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}
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public int ReadFrom (byte[] input)
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{
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Buffer.BlockCopy (input, 0, m_ctl_bits, 0, ByteLength);
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return ByteLength;
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}
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public bool Decode (byte[] output, int dst_pos, int output_size, IBinaryStream input, out int output_chunk_size)
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{
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for (int i = 0; i < Length; ++i)
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{
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if (0 != (m_ctl_bits[i >> 3] & 1))
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{
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m_data[i] = 0;
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}
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else
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{
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int next = input.ReadByte();
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if (-1 == next)
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break;
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m_data[i] = (byte)next;
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}
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m_ctl_bits[i >> 3] >>= 1;
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}
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m_data[0] ^= m_last_byte;
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for (int i = 0; i < Length; ++i)
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{
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m_data[i+1] ^= m_data[i];
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}
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m_last_byte = m_data[Length - 1];
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output_chunk_size = Math.Min (Length, output_size);
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Buffer.BlockCopy (m_data, 0, output, dst_pos, output_chunk_size);
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return Length > output_size;
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}
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}
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}
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}
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