mirror of
https://github.com/crskycode/GARbro.git
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268 lines
9.5 KiB
C#
268 lines
9.5 KiB
C#
//! \file ImageGD.cs
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//! \date Fri Jan 20 07:07:47 2017
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//! \brief C4 engine image format.
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//
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// Copyright (C) 2017 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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namespace GameRes.Formats.C4
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{
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internal class GdMetaData : ImageMetaData
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{
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public uint DataOffset;
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public int Compression;
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}
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[Export(typeof(ImageFormat))]
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public class GdFormat : ImageFormat
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{
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public override string Tag { get { return "GD/C4"; } }
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public override string Description { get { return "C4 engine image format"; } }
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public override uint Signature { get { return 0x1A324447; } } // 'GD2\x1A'
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public GdFormat ()
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{
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Signatures = new uint[] { 0x1A324447, 0x1A334447 };
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}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (4);
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if (!header.AsciiEqual (0, "GD"))
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return null;
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int version = header[2] - '0';
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GdMetaData info;
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if (2 == version)
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info = new GdMetaData { Width = 640, Height = 480, BPP = 24 };
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else if (3 == version)
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info = new GdMetaData { Width = 800, Height = 600, BPP = 24 };
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else
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return null;
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file.Position = 4 + 3 * (info.Width / 10) * (info.Height / 10 - 1);
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int compression = file.ReadByte();
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if (compression != 'b' && compression != 'l' && compression != 'p')
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return null;
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info.Compression = compression;
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info.DataOffset = (uint)file.Position + 1;
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return info;
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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 reader = new GdReader (file, (GdMetaData)info);
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var pixels = reader.Unpack();
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return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, reader.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 NotImplementedException ("GdFormat.Write not implemented");
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}
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}
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[Export(typeof(ImageFormat))]
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public class XexGdFormat : ImageFormat
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{
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public override string Tag { get { return "GD/XEX"; } }
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public override string Description { get { return "Complets XEX engine 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 (".GD"))
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return null;
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var header = file.ReadHeader (2);
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int compression = header[0];
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if (compression != 'l' && compression != 'p' || header[1] != 0x1A)
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return null;
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return new GdMetaData {
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Width = 640, Height = 480, BPP = 24,
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Compression = compression,
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DataOffset = 2,
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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 reader = new GdReader (file, (GdMetaData)info);
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var pixels = reader.Unpack();
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return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, reader.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 NotImplementedException ("XexGdFormat.Write not implemented");
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}
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}
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internal sealed class GdReader
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{
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IBinaryStream m_input;
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GdMetaData m_info;
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byte[] m_output;
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public int Stride { get { return (int)m_info.Width * 3; } }
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public GdReader (IBinaryStream input, GdMetaData info)
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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.Width * m_info.Height * 3];
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}
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public byte[] Unpack ()
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{
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m_input.Position = m_info.DataOffset;
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if ('b' == m_info.Compression)
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{
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m_input.Read (m_output, 0, m_output.Length);
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}
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else
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{
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using (var bits = new MsbBitStream (m_input.AsStream, true))
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{
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if ('l' == m_info.Compression)
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UnpackL (bits);
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else if ('p' == m_info.Compression)
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UnpackP (bits);
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else
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throw new InvalidFormatException();
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}
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}
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return m_output;
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}
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void UnpackL (IBitStream input)
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{
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int dst = 0;
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var frame = new byte[0x10000];
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int frame_pos = 1;
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while (dst < m_output.Length)
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{
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int bit = input.GetNextBit();
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if (-1 == bit)
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break;
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if (0 != bit)
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{
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byte v = (byte)input.GetBits (8);
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m_output[dst++] = v;
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frame[frame_pos++ & 0xFFFF] = v;
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}
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else
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{
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int offset = input.GetBits (16);
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int count = input.GetBits (4);
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if (-1 == offset || -1 == count)
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break;
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count += 3;
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while (count --> 0)
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{
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byte v = frame[offset++ & 0xFFFF];
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m_output[dst++] = v;
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frame[frame_pos++ & 0xFFFF] = v;
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}
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}
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}
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}
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void UnpackP (IBitStream input)
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{
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int dst = 0;
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for (int i = 0; i < m_output.Length; ++i)
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m_output[i] = 0xFF;
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int width = (int)m_info.Width;
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while (dst < m_output.Length)
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{
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int count = input.GetBits (2);
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if (-1 == count)
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break;
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if (2 == count)
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{
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count = input.GetBits (2) + 2;
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}
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else if (3 == count)
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{
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int n = 3;
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while (input.GetNextBit() > 0)
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++n;
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if (n >= 24)
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break;
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count = (1 << n | input.GetBits (n)) - 2;
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}
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dst += 3 * count;
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m_output [dst ] = (byte)input.GetBits (8);
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m_output [dst+1] = (byte)input.GetBits (8);
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m_output [dst+2] = (byte)input.GetBits (8);
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if (input.GetNextBit() > 0)
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{
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int copy_dst = dst;
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for (;;)
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{
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int ctl = input.GetBits (2);
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if (0 == ctl)
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{
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if (input.GetNextBit() <= 0)
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break;
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if (input.GetNextBit() > 0)
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copy_dst += (width + 2) * 3;
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else
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copy_dst += (width - 2) * 3;
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}
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else if (1 == ctl)
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copy_dst += (width - 1) * 3;
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else if (2 == ctl)
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copy_dst += width * 3;
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else if (3 == ctl)
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copy_dst += (width + 1) * 3;
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else if (-1 == ctl)
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break;
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m_output[copy_dst] = m_output[dst];
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m_output[copy_dst+1] = m_output[dst+1];
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m_output[copy_dst+2] = m_output[dst+2];
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}
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}
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dst += 3;
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}
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byte b = 0, g = 0, r = 0;
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for (dst = 0; dst < m_output.Length; dst += 3)
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{
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if (0xFF == m_output[dst] && 0xFF == m_output[dst+1] && 0xFF == m_output[dst+2])
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{
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m_output[dst ] = b;
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m_output[dst+1] = g;
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m_output[dst+2] = r;
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}
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else
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{
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b = m_output[dst ];
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g = m_output[dst+1];
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r = m_output[dst+2];
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}
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}
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}
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}
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}
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