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(ISG): moved to Ism folder.
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morkt
parent
4e8a4edd4a
commit
68dae3e40a
@ -41,6 +41,7 @@ namespace GameRes.Formats.ISM
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public int Colors;
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public uint Packed;
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public uint Unpacked;
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public int RecursionDepth;
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}
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[Export(typeof(ImageFormat))]
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@ -78,88 +79,46 @@ namespace GameRes.Formats.ISM
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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var meta = (IsgMetaData)info;
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if (0x21 != meta.Type && 0x10 != meta.Type)
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if (0x21 != meta.Type && 0x10 != meta.Type && 0x34 != meta.Type)
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throw new InvalidFormatException ("Unsupported ISM image type");
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stream.Position = 0x30;
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using (var input = new Reader (stream, meta))
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{
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if (0x21 == meta.Type)
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input.Unpack21();
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else
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input.Unpack10();
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var input = new Reader (stream, meta);
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var pixels = input.Unpack (this);
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var palette = new BitmapPalette (input.Palette);
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return ImageData.CreateFlipped (info, PixelFormats.Indexed8, palette, input.Data, (int)info.Width);
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}
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return ImageData.CreateFlipped (info, PixelFormats.Indexed8, palette, input.Data, info.iWidth);
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}
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internal class Reader : IDisposable
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internal class Reader
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{
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IBinaryStream m_input;
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byte[] m_data;
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Color[] m_palette;
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int m_input_size;
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IsgMetaData m_info;
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public Color[] Palette { get { return m_palette; } }
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public const int RecursionLimit = 32; // have seen 18 deep
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public Color[] Palette { get; private set; }
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public byte[] Data { get { return m_data; } }
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public Reader (IBinaryStream file, IsgMetaData info)
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{
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int palette_size = (int)info.Colors*4;
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var palette_data = new byte[Math.Max (0x400, palette_size)];
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if (palette_size != file.Read (palette_data, 0, palette_size))
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throw new InvalidFormatException();
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m_palette = new Color[0x100];
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for (int i = 0; i < m_palette.Length; ++i)
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{
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m_palette[i] = Color.FromRgb (palette_data[i*4+2], palette_data[i*4+1], palette_data[i*4]);
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}
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m_input = file;
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m_input_size = (int)info.Packed;
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m_data = new byte[info.Width * info.Height];
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m_info = info;
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}
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public void Unpack21 ()
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public byte[] Unpack (IsgFormat isg)
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{
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int dst = 0;
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var frame = new byte[2048];
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int frame_pos = 2039;
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int remaining = m_input_size;
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byte ctl = m_input.ReadUInt8();
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--remaining;
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int bit = 0x80;
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while (remaining > 0)
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{
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if (0 != (ctl & bit))
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{
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byte hi = m_input.ReadUInt8();
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byte lo = m_input.ReadUInt8();
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remaining -= 2;
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int offset = (hi & 7) << 8 | lo;
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for (int count = (hi >> 3) + 3; count > 0; --count)
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{
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byte p = frame[offset];
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frame[frame_pos] = p;
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m_data[dst++] = p;
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offset = (offset + 1) & 0x7ff;
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frame_pos = (frame_pos + 1) & 0x7ff;
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}
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}
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m_input.Position = 0x30;
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if (0x34 == m_info.Type)
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return Unpack34(isg);
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Palette = ImageFormat.ReadColorMap (m_input.AsStream);
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m_data = new byte[m_info.Width * m_info.Height];
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if (0x21 == m_info.Type)
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DecompressLzss (m_input_size, m_data);
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else
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{
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byte p = m_input.ReadUInt8();
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--remaining;
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m_data[dst++] = p;
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frame[frame_pos] = p;
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frame_pos = (frame_pos + 1) & 0x7ff;
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}
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if (0 == (bit >>= 1))
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{
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ctl = m_input.ReadUInt8();
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--remaining;
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bit = 0x80;
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}
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}
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Unpack10();
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return m_data;
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}
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public void Unpack10 ()
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@ -192,12 +151,112 @@ namespace GameRes.Formats.ISM
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}
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}
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#region IDisposable Members
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public void Dispose ()
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public byte[] Unpack34 (IsgFormat isg)
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{
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GC.SuppressFinalize (this);
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if (m_info.RecursionDepth >= RecursionLimit)
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throw new InvalidFormatException ("Recursion limit reached for ISG image.");
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var base_name = m_input.ReadCString (0x10);
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var base_image = ReadBaseImage (base_name, isg);
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if (null == base_image)
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throw new InvalidFormatException ("Unable to read baseline ISG image.");
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int count = m_input.ReadInt32();
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int packed_size = m_input.ReadInt32();
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int ovl_ctl_size = m_info.iWidth * m_info.iHeight / 128;
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var overlay_info = m_input.ReadBytes (ovl_ctl_size);
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var overlay_data = new byte[count * 32 + 8];
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DecompressLzss (packed_size, overlay_data);
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int bit_count = 0;
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int ctl_src = 0;
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int data_src = 0;
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for (int y = 0; y < m_info.iHeight; y += 4)
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for (int x = 0; x < m_info.iWidth; x += 4)
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{
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if (((1 << bit_count) & overlay_info[ctl_src]) != 0)
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{
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int dst = y * m_info.iWidth + x;
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for (int r = 0; r < 4; ++r)
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{
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base_image[dst ] = overlay_data[data_src++];
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base_image[dst+1] = overlay_data[data_src++];
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base_image[dst+2] = overlay_data[data_src++];
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base_image[dst+3] = overlay_data[data_src++];
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dst += m_info.iWidth;
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}
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}
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if (++bit_count == 8)
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{
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bit_count = 0;
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++ctl_src;
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}
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}
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return m_data = base_image;
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}
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internal void DecompressLzss (int remaining, byte[] output)
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{
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int dst = 0;
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var frame = new byte[2048];
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int frame_pos = 2039;
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byte ctl = m_input.ReadUInt8();
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--remaining;
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int bit = 0x80;
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while (remaining > 0)
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{
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if (0 != (ctl & bit))
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{
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byte hi = m_input.ReadUInt8();
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byte lo = m_input.ReadUInt8();
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remaining -= 2;
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int offset = (hi & 7) << 8 | lo;
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for (int count = (hi >> 3) + 3; count > 0; --count)
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{
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byte p = frame[offset];
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frame[frame_pos] = p;
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output[dst++] = p;
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offset = (offset + 1) & 0x7ff;
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frame_pos = (frame_pos + 1) & 0x7ff;
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}
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}
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else
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{
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byte p = m_input.ReadUInt8();
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--remaining;
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output[dst++] = p;
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frame[frame_pos] = p;
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frame_pos = (frame_pos + 1) & 0x7ff;
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}
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if (0 == (bit >>= 1))
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{
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ctl = m_input.ReadUInt8();
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--remaining;
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bit = 0x80;
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}
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}
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}
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internal byte[] ReadBaseImage (string name, IsgFormat isg)
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{
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if (!VFS.FileExists (name))
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{
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if (name.Length <= 12)
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return null;
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name = name.Substring (0, 12);
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if (!VFS.FileExists (name))
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return null;
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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 = isg.ReadMetaData (base_file) as IsgMetaData;
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if (null == base_info || base_info.Width != m_info.Width || base_info.Height != m_info.Height)
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throw new InvalidFormatException ("Invalid baseline ISG image.");
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base_info.RecursionDepth = m_info.RecursionDepth + 1;
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base_info.FileName = name;
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var reader = new Reader (base_file, base_info);
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var pixels = reader.Unpack (isg);
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this.Palette = reader.Palette;
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return pixels;
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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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}
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