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145 lines
5.0 KiB
C#
145 lines
5.0 KiB
C#
//! \file ImageHHP.cs
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//! \date 2018 Jul 07
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//! \brief May-Be Soft image format.
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//
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// Copyright (C) 2018 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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// [960920][May-Be Soft] Blind Games
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namespace GameRes.Formats.MayBeSoft
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{
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[Export(typeof(ImageFormat))]
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public class HhpFormat : ImageFormat
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{
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public override string Tag { get { return "HHP"; } }
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public override string Description { get { return "May-Be Soft image format"; } }
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public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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if (!file.Name.HasExtension ("HHP"))
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return null;
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return new ImageMetaData { Width = 640, Height = 400, BPP = 8 };
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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 HhpReader (file, info))
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{
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var pixels = reader.Unpack();
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return ImageData.CreateFlipped (info, reader.Format, reader.Palette, 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 ("HhpFormat.Write not implemented");
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}
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}
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internal class HhpReader : IDisposable
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{
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MsbBitStream m_input;
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byte[] m_output;
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int m_stride;
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public PixelFormat Format { get { return PixelFormats.Indexed8; } }
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public int Stride { get { return m_stride; } }
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public BitmapPalette Palette { get; private set; }
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public HhpReader (IBinaryStream input, ImageMetaData info)
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{
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m_input = new MsbBitStream (input.AsStream, true);
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m_output = new byte[info.Width * info.Height];
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m_stride = (int)info.Width;
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}
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public byte[] Unpack ()
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{
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Palette = ImageFormat.ReadPalette (m_input.Input, 0x100, PaletteFormat.Rgb);
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int dst = -1;
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while (dst < m_output.Length)
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{
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int code = m_input.GetBits (2);
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if (-1 == code)
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throw new InvalidFormatException();
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int count = m_input.GetBits (LengthTable[code]);
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if (0 == count)
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break;
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dst += count;
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byte pix = (byte)m_input.GetBits (8);
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m_output[dst] = pix;
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int pos = dst;
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for (;;)
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{
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code = m_input.GetBits (3);
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if (-1 == code)
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throw new InvalidFormatException();
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if (0 == code)
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break;
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if (6 == code)
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{
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code = m_input.GetBits (2);
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count = m_input.GetBits (LengthTable[code]);
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pos += m_stride * count;
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}
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else
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{
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pos += m_stride + SkipTable[code];
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m_output[pos] = pix;
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}
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}
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}
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byte rep = 0;
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for (int i = 0; i < m_output.Length; ++i)
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{
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if (m_output[i] == 0)
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m_output[i] = rep;
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else if (m_output[i] == rep)
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m_output[i] = rep = 0;
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else
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rep = m_output[i];
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}
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return m_output;
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}
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static readonly byte[] LengthTable = { 4, 6, 8, 0x14 };
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static readonly sbyte[] SkipTable = { 0, 0, 1, -1, 2, -2 };
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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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}
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}
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