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296 lines
10 KiB
C#
296 lines
10 KiB
C#
//! \file ImageGR2.cs
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//! \date Tue Jul 21 03:54:51 2015
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//! \brief AdvSys engine image format.
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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 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 GameRes.Utility;
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namespace GameRes.Formats.AdvSys
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{
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[Export(typeof(ImageFormat))]
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public class Gr2Format : ImageFormat
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{
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public override string Tag { get { return "GR2"; } }
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public override string Description { get { return "AdvSys engine image format"; } }
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public override uint Signature { get { return 0x5F325247; } } // 'GR2_'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[16];
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if (16 != stream.Read (header, 0, 16))
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return null;
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return new ImageMetaData
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{
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Width = LittleEndian.ToUInt16 (header, 4),
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Height = LittleEndian.ToUInt16 (header, 6),
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BPP = LittleEndian.ToInt16 (header, 12) * 8
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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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stream.Position = 0x10;
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int stride = ((int)info.Width * info.BPP/8 + 3) & ~3;
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var pixels = new byte[stride * info.Height];
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if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
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throw new InvalidFormatException ("Unexpected end of file");
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PixelFormat format;
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switch (info.BPP)
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{
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case 32: format = PixelFormats.Bgra32; break;
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case 24: format = PixelFormats.Bgr24; break;
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case 16: format = PixelFormats.Bgr565; break;
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default: throw new NotSupportedException ("Not supported image bitdepth");
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}
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return ImageData.Create (info, format, null, pixels, stride);
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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 ("Gr2Format.Write not implemented");
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}
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}
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internal class PolaMetaData : ImageMetaData
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{
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public int UnpackedSize;
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}
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[Export(typeof(ImageFormat))]
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public class PolaFormat : Gr2Format
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{
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public override string Tag { get { return "GR2/Pola"; } }
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public override string Description { get { return "AdvSys engine compressed image format"; } }
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public override uint Signature { get { return 0x6C6F502A; } } // '*Pola*'
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public PolaFormat ()
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{
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Extensions = new string[] { "gr2" };
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[20];
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if (20 != stream.Read (header, 0, 20))
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return null;
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if (!Binary.AsciiEqual (header, "*Pola* "))
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return null;
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int unpacked_size = LittleEndian.ToInt32 (header, 8);
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using (var reader = new PolaReader (stream, 64))
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{
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reader.Unpack();
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using (var temp = new MemoryStream (reader.Data))
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{
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var info = base.ReadMetaData (temp);
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if (null == info)
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return null;
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return new PolaMetaData
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{
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Width = info.Width,
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Height = info.Height,
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BPP = info.BPP,
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UnpackedSize = unpacked_size,
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};
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}
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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 = info as PolaMetaData;
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if (null == meta)
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throw new ArgumentException ("PolaFormat.Read should be supplied with PolaMetaData", "info");
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stream.Position = 0x14;
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using (var reader = new PolaReader (stream, meta.UnpackedSize))
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{
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reader.Unpack();
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using (var temp = new MemoryStream (reader.Data))
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return base.Read (temp, info);
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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 ("PolaFormat.Write not implemented");
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}
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}
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internal sealed class PolaReader : IDisposable
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{
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BinaryReader m_input;
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byte[] m_output;
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public byte[] Data { get { return m_output; } }
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public PolaReader (Stream input, int unpacked_size)
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{
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m_input = new ArcView.Reader (input);
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m_output = new byte[unpacked_size+2];
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}
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public void Unpack ()
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{
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NextBit();
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int dst = 0;
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while (dst < m_output.Length-2)
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{
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if (0 != NextBit())
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{
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m_output[dst++] = m_input.ReadByte();
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continue;
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}
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int offset, count = 0;
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if (0 != NextBit())
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{
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offset = m_input.ReadByte() - 256;
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if (0 == NextBit())
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{
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count += 256;
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}
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if (0 == NextBit())
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{
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offset -= 512;
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if (0 == NextBit())
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{
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count *= 2;
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if (0 == NextBit())
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count += 256;
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offset -= 512;
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if (0 == NextBit())
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{
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count *= 2;
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if (0 == NextBit())
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count += 256;
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offset -= 1024;
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if (0 == NextBit())
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{
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offset -= 2048;
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count *= 2;
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if (0 == NextBit())
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count += 256;
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}
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}
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}
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}
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offset -= count;
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if (0 != NextBit())
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count = 3;
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else if (0 != NextBit())
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count = 4;
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else if (0 != NextBit())
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count = 5;
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else if (0 != NextBit())
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count = 6;
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else if (0 != NextBit())
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{
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if (0 != NextBit())
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count = 8;
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else
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count = 7;
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}
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else if (0 == NextBit())
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{
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count = 9;
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if (0 != NextBit())
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count += 4;
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if (0 != NextBit())
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count += 2;
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if (0 != NextBit())
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++count;
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}
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else
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{
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count = m_input.ReadByte() + 17;
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}
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if (dst + count > m_output.Length)
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count = m_output.Length - dst;
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Binary.CopyOverlapped (m_output, dst + offset, dst, count);
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dst += count;
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}
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else
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{
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offset = m_input.ReadByte() - 256;
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if (0 == NextBit())
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{
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if (offset != -1)
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{
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int src = dst + offset;
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m_output[dst++] = m_output[src++];
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m_output[dst++] = m_output[src++];
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}
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else if (0 == NextBit())
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break;
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}
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else
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{
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offset -= 256;
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if (0 == NextBit())
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offset -= 1024;
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if (0 == NextBit())
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offset -= 512;
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if (0 == NextBit())
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offset -= 256;
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int src = dst + offset;
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m_output[dst++] = m_output[src++];
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m_output[dst++] = m_output[src++];
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}
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}
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}
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}
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int m_flag = 2;
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int NextBit ()
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{
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int bit = m_flag & 1;
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m_flag >>= 1;
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if (1 == m_flag)
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{
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m_flag = m_input.ReadUInt16() | 0x10000;
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}
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return bit;
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}
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#region IDisposable Members
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_input.Dispose();
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m_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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