mirror of
https://github.com/crskycode/GARbro.git
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306 lines
9.6 KiB
C#
306 lines
9.6 KiB
C#
//! \file ImageKG.cs
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//! \date Wed Oct 19 15:51:18 2016
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//! \brief AbogadoPowers 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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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats.Abogado
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{
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internal class KgMetaData : ImageMetaData
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{
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public int PaletteOffset;
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public int DataOffset;
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public int AlphaOffset;
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}
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[Export(typeof(ImageFormat))]
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public class KgFormat : ImageFormat
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{
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public override string Tag { get { return "KG/ABOGADO"; } }
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public override string Description { get { return "AbogadoPowers image format"; } }
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public override uint Signature { get { return 0; } }
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public KgFormat ()
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{
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Signatures = new uint[] { 0x0202474B, 0x0102474B };
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}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (0x30);
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return new KgMetaData
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{
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Width = header.ToUInt16 (4),
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Height = header.ToUInt16 (6),
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BPP = header[3] == 2 ? 24 : 8,
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PaletteOffset = header.ToInt32 (0xC),
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DataOffset = header.ToInt32 (0x10),
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AlphaOffset = header.ToInt32 (0x2C),
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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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using (var reader = new KgReader (file, (KgMetaData)info))
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{
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reader.Unpack();
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return ImageData.CreateFlipped (info, reader.Format, reader.Palette, reader.Pixels, 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 ("KgFormat.Write not implemented");
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}
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}
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internal sealed class KgReader : IDisposable
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{
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IBinaryStream m_input;
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MsbBitStream m_bits;
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KgMetaData m_info;
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byte[] m_output;
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int m_pixel_size;
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int m_stride;
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public PixelFormat Format { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public byte[] Pixels { get { return m_output; } }
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public int Stride { get { return m_stride; } }
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public KgReader (IBinaryStream input, KgMetaData info)
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{
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m_input = input;
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m_bits = new MsbBitStream (input.AsStream, true);
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m_info = info;
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m_pixel_size = m_info.BPP / 8;
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m_stride = m_pixel_size * (int)m_info.Width;
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m_output = new byte[m_stride * (int)m_info.Height];
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if (0 != m_info.AlphaOffset)
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Format = PixelFormats.Bgra32;
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else if (24 == m_info.BPP)
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Format = PixelFormats.Bgr24;
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else
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Format = PixelFormats.Indexed8;
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}
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public void Unpack ()
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{
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if (8 == m_info.BPP)
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{
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m_input.Position = m_info.PaletteOffset;
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Palette = ImageFormat.ReadPalette (m_input.AsStream);
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}
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m_bits.Input.Position = m_info.DataOffset;
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ResetDict();
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UnpackChannel (0);
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if (m_pixel_size > 1)
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{
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UnpackChannel (1);
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UnpackChannel (2);
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}
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if (m_info.AlphaOffset != 0)
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{
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ConvertToBgr32();
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try
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{
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m_bits.Input.Position = m_info.AlphaOffset;
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m_bits.Reset();
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ResetDict();
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UnpackChannel (3);
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}
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catch
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{
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Format = PixelFormats.Bgr32;
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}
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}
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}
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byte[] m_dict = new byte[0x800];
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void ResetDict ()
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{
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for (int i = 0; i < 0x800; ++i)
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m_dict[i] = (byte)(i & 7);
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}
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void ConvertToBgr32 ()
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{
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m_stride = (int)m_info.Width * 4;
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var pixels = new byte[m_stride * (int)m_info.Height];
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int dst = 0;
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if (1 == m_pixel_size)
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{
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var colors = Palette.Colors;
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for (int src = 0; src < m_output.Length; ++src)
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{
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var pixel = colors[m_output[src]];
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pixels[dst] = pixel.B;
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pixels[dst+1] = pixel.G;
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pixels[dst+2] = pixel.R;
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dst += 4;
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}
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}
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else
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{
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for (int src = 0; src < m_output.Length; src += m_pixel_size)
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{
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pixels[dst] = m_output[src];
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pixels[dst+1] = m_output[src+1];
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pixels[dst+2] = m_output[src+2];
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dst += 4;
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}
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}
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m_output = pixels;
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m_pixel_size = 4;
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}
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void UnpackChannel (int dst)
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{
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m_output[dst] = (byte)m_bits.GetBits (8);
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dst += m_pixel_size;
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m_output[dst] = (byte)m_bits.GetBits (8);
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dst += m_pixel_size;
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while (dst < m_output.Length)
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{
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int ctl = m_bits.GetBits (1);
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if (-1 == ctl)
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throw new EndOfStreamException();
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if (0 == ctl)
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{
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byte b = GetPixel (dst);
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m_output[dst] = b;
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UpdateDict (b, m_output[dst - m_pixel_size]);
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dst += m_pixel_size;
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continue;
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}
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if (0 != m_bits.GetBits (1))
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ctl = m_bits.GetBits (2);
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else
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ctl = 4;
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int offset;
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switch (ctl)
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{
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case 0:
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offset = m_stride;
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break;
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case 1:
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offset = m_stride - m_pixel_size;
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break;
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case 2:
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offset = m_stride + m_pixel_size;
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break;
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case 3:
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offset = 2 * m_pixel_size;
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break;
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default:
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offset = m_pixel_size;
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break;
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}
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int count = GetCount();
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int src = dst - offset;
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for (int i = 0; i < count; ++i)
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{
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m_output[dst] = m_output[src];
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dst += m_pixel_size;
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src += m_pixel_size;
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}
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}
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}
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byte GetPixel (int dst)
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{
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if (1 == m_bits.GetBits (1))
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{
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return (byte)m_bits.GetBits (8);
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}
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else
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{
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int n = 8 * m_output[dst - m_pixel_size];
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return m_dict[n + m_bits.GetBits (3)];
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}
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}
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void UpdateDict (byte b, byte prev)
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{
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int s = 8 * prev;
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int i;
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for (i = 0; i < 8; ++i)
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{
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if (m_dict[s + i] == b)
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break;
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}
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if (i != 0)
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{
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if (8 == i)
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i = 7;
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Buffer.BlockCopy (m_dict, s, m_dict, s+1, i);
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m_dict[s] = b;
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}
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}
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int GetCount ()
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{
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int count = m_bits.GetBits (2);
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if (0 == count)
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{
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count = m_bits.GetBits (4);
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if (0 != count)
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{
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count += 3;
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}
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else
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{
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count = m_bits.GetBits (8);
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if (0 == count)
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{
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count = m_bits.GetBits (16);
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if (0 == count)
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{
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count = m_bits.GetBits (16) << 16;
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count |= m_bits.GetBits (16);
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}
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}
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}
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}
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return count;
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}
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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_bits.Dispose();
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_disposed = true;
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}
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}
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}
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}
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