mirror of
https://github.com/crskycode/GARbro.git
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274 lines
9.5 KiB
C#
274 lines
9.5 KiB
C#
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//! \file ImageBSG.cs
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//! \date Sat Oct 24 17:07:43 2015
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//! \brief Bishop graphics image.
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//
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// Copyright (C) 2015 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 GameRes.Utility;
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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.Bishop
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{
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internal class BsgMetaData : ImageMetaData
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{
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public int UnpackedSize;
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public int ColorMode;
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public int CompressionMode;
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public int DataOffset;
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public int DataSize;
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public int PaletteOffset;
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}
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[Export(typeof(ImageFormat))]
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public class BsgFormat : ImageFormat
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{
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public override string Tag { get { return "BSG"; } }
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public override string Description { get { return "Bishop image format"; } }
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public override uint Signature { get { return 0x2D535342; } } // 'BSS-'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[0x60];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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int base_offset = 0;
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if (Binary.AsciiEqual (header, 0, "BSS-Composition\0"))
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base_offset = 0x20;
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if (!Binary.AsciiEqual (header, base_offset, "BSS-Graphics\0"))
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return null;
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int type = header[base_offset+0x30];
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if (type > 2)
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return null;
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return new BsgMetaData
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{
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Width = LittleEndian.ToUInt16 (header, base_offset+0x16),
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Height = LittleEndian.ToUInt16 (header, base_offset+0x18),
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OffsetX = LittleEndian.ToInt16 (header, base_offset+0x20),
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OffsetY = LittleEndian.ToInt16 (header, base_offset+0x22),
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UnpackedSize = LittleEndian.ToInt32 (header, base_offset+0x12),
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BPP = 2 == type ? 8 : 32,
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ColorMode = type,
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CompressionMode = header[base_offset+0x31],
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DataOffset = LittleEndian.ToInt32 (header, base_offset+0x32)+base_offset,
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DataSize = LittleEndian.ToInt32 (header, base_offset+0x36),
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PaletteOffset = LittleEndian.ToInt32 (header, base_offset+0x3A)+base_offset,
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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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var meta = (BsgMetaData)info;
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using (var reader = new BsgReader (stream, meta))
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{
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reader.Unpack();
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return ImageData.CreateFlipped (info, reader.Format, reader.Palette, 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 ("xxxFormat.Write not implemented");
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}
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}
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internal sealed class BsgReader : IDisposable
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{
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BinaryReader m_input;
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BsgMetaData 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 PixelFormat Format { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public int Stride { get; private set; }
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public BsgReader (Stream input, BsgMetaData info)
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{
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m_info = info;
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if (m_info.CompressionMode > 2)
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throw new NotSupportedException ("Not supported BSS Graphics compression");
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m_input = new ArcView.Reader (input);
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m_output = new byte[m_info.UnpackedSize];
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switch (m_info.ColorMode)
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{
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case 0:
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Format = PixelFormats.Bgra32;
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Stride = (int)m_info.Width * 4;
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break;
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case 1:
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Format = PixelFormats.Bgr32;
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Stride = (int)m_info.Width * 4;
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break;
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case 2:
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Format = PixelFormats.Indexed8;
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Stride = (int)m_info.Width;
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Palette = ReadPalette();
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break;
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}
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}
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public void Unpack ()
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{
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m_input.BaseStream.Position = m_info.DataOffset;
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if (0 == m_info.CompressionMode)
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{
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if (1 == m_info.ColorMode)
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{
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int dst = 0;
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for (int count = m_info.DataSize / 3; count > 0; --count)
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{
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m_input.Read (m_output, dst, 3);
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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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m_input.Read (m_output, 0, m_info.DataSize);
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}
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}
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else
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{
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Action<int, int> unpacker;
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if (1 == m_info.CompressionMode)
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unpacker = UnpackRle;
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else
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unpacker = UnpackLz;
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if (0 == m_info.ColorMode)
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{
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for (int channel = 0; channel < 4; ++channel)
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unpacker (channel, 4);
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}
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else if (1 == m_info.ColorMode)
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{
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for (int channel = 0; channel < 3; ++channel)
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unpacker (channel, 4);
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}
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else
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{
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unpacker (0, 1);
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}
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}
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}
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void UnpackRle (int dst, int pixel_size)
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{
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int remaining = m_input.ReadInt32();
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while (remaining > 0)
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{
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int count = m_input.ReadSByte();
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--remaining;
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if (count >= 0)
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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] = m_input.ReadByte();
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--remaining;
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dst += pixel_size;
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}
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}
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else
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{
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count = 1 - count;
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byte repeat = m_input.ReadByte();
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--remaining;
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for (int i = 0; i < count; ++i)
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{
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m_output[dst] = repeat;
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dst += pixel_size;
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}
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}
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}
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}
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void UnpackLz (int plane, int pixel_size)
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{
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int dst = plane;
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byte control = m_input.ReadByte();
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int remaining = m_input.ReadInt32() - 5;
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while (remaining > 0)
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{
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byte c = m_input.ReadByte();
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--remaining;
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if (c == control)
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{
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int offset = m_input.ReadByte();
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--remaining;
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if (offset != control)
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{
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int count = m_input.ReadByte();
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--remaining;
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if (offset > control)
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--offset;
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offset *= pixel_size;
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while (count --> 0)
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{
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m_output[dst] = m_output[dst-offset];
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dst += pixel_size;
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}
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continue;
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}
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}
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m_output[dst] = c;
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dst += pixel_size;
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}
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for (int i = plane + pixel_size; i < m_output.Length; i += pixel_size)
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m_output[i] += m_output[i-pixel_size];
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}
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BitmapPalette ReadPalette ()
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{
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m_input.BaseStream.Position = m_info.PaletteOffset;
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var palette_data = new byte[0x400];
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if (palette_data.Length != m_input.Read (palette_data, 0, palette_data.Length))
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throw new InvalidFormatException();
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var palette = new Color[0x100];
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for (int i = 0; i < palette.Length; ++i)
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{
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int c = i * 4;
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palette[i] = Color.FromRgb (palette_data[c+2], palette_data[c+1], palette_data[c]);
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}
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return new BitmapPalette (palette);
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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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