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https://github.com/crskycode/GARbro.git
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implemented FJSYS archives and MGD images.
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morkt
240
ArcFormats/NSystem/ImageMGD.cs
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240
ArcFormats/NSystem/ImageMGD.cs
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//! \file ImageMGD.cs
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//! \date Thu Nov 24 14:37:18 2016
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//! \brief NSystem 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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namespace GameRes.Formats.NSystem
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{
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internal class MgdMetaData : ImageMetaData
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{
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public int DataOffset;
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public int UnpackedSize;
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public int Mode;
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}
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[Export(typeof(ImageFormat))]
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public class MgdFormat : ImageFormat
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{
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public override string Tag { get { return "MGD/NSystem"; } }
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public override string Description { get { return "NSystem image format"; } }
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public override uint Signature { get { return 0x2044474D; } } // 'MGD '
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (0x1A);
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int header_size = header.ToUInt16 (4);
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uint width = header.ToUInt16 (0xC);
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uint height = header.ToUInt16 (0xE);
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int unpacked_size = header.ToInt32 (0x10);
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int mode = header.ToInt32 (0x18);
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if (mode < 0 || mode > 2)
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return null;
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return new MgdMetaData
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{
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Width = width,
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Height = height,
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BPP = 32,
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DataOffset = header_size,
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UnpackedSize = unpacked_size,
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Mode = mode,
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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 meta = (MgdMetaData)info;
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file.Position = meta.DataOffset;
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int data_size = file.ReadInt32();
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switch (meta.Mode)
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{
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case 0:
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var pixels = file.ReadBytes (data_size);
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return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
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case 1:
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{
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var decoder = new MgdDecoder (file, meta, data_size);
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decoder.Unpack();
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return ImageData.Create (info, PixelFormats.Bgra32, null, decoder.Data);
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}
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case 2:
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using (var png = new StreamRegion (file.AsStream, file.Position, data_size, true))
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{
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var decoder = new PngBitmapDecoder (png,
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BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
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var frame = decoder.Frames[0];
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frame.Freeze();
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return new ImageData (frame, info);
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}
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default:
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throw new InvalidFormatException();
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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 ("MgdFormat.Write not implemented");
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}
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}
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internal class MgdDecoder
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{
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IBinaryStream m_input;
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MgdMetaData m_info;
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byte[] m_output;
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public byte[] Data { get { return m_output; } }
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public MgdDecoder (IBinaryStream input, MgdMetaData info, int packed_size)
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{
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m_input = input;
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m_info = info;
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m_output = new byte[m_info.UnpackedSize];
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}
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public void Unpack ()
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{
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int alpha_size = m_input.ReadInt32();
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UnpackAlpha (alpha_size);
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int rgb_size = m_input.ReadInt32();
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UnpackColor (rgb_size);
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}
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void UnpackAlpha (int length)
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{
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int dst = 3;
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while (length > 0)
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{
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int count = m_input.ReadInt16();
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length -= 2;
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if (count < 0)
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{
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count = (count & 0x7FFF) + 1;
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byte a = (byte)~m_input.ReadUInt8();
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length--;
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for (int i = 0; i < count; ++i)
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{
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m_output[dst] = a;
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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 i = 0; i < count; ++i)
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{
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m_output[dst] = (byte)~m_input.ReadUInt8();
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dst += 4;
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}
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length -= count;
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}
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}
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}
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void UnpackColor (int length)
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{
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int dst = 0;
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while (length > 0)
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{
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int count = m_input.ReadUInt8();
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length--;
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switch (count & 0xC0)
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{
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case 0x80:
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count &= 0x3F;
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int b = m_output[dst-4];
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int g = m_output[dst-3];
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int r = m_output[dst-2];
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for (int i = 0; i < count; ++i)
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{
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ushort delta = m_input.ReadUInt16();
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length -= 2;
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if (0 != (delta & 0x8000))
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{
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r += (delta >> 10) & 0x1F;
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g += (delta >> 5) & 0x1F;
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b += delta & 0x1F;
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}
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else
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{
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if (0 != (delta & 0x4000))
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r -= (delta >> 10) & 0xF;
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else
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r += (delta >> 10) & 0xF;
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if (0 != (delta & 0x0200))
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g -= (delta >> 5) & 0xF;
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else
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g += (delta >> 5) & 0xF;
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if (0 != (delta & 0x0010))
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b -= delta & 0xF;
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else
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b += delta & 0xF;
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}
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m_output[dst ] = (byte)b;
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m_output[dst+1] = (byte)g;
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m_output[dst+2] = (byte)r;
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dst += 4;
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}
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break;
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case 0x40:
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count &= 0x3F;
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m_input.Read (m_output, dst, 3);
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length -= 3;
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int src = dst;
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dst += 4;
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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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m_output[dst+1] = m_output[src+1];
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m_output[dst+2] = m_output[src+2];
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dst += 4;
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}
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break;
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case 0:
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for (int i = 0; i < count; ++i)
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{
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m_input.Read (m_output, dst, 3);
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length -= 3;
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dst += 4;
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}
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break;
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default:
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throw new InvalidFormatException();
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}
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}
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}
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}
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}
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