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238 lines
8.1 KiB
C#
238 lines
8.1 KiB
C#
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//! \file ImageCBF.cs
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//! \date 2018 Mar 29
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//! \brief Abel 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 GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Abel
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{
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internal class CbfMetaData : ImageMetaData
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{
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public int Compression;
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}
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[Export(typeof(ImageFormat))]
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public class CbfFormat : ImageFormat
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{
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public override string Tag { get { return "CBF"; } }
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public override string Description { get { return "Abel image format"; } }
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public override uint Signature { get { return 0x31464243; } } // 'CBF1'
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public CbfFormat ()
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{
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Signatures = new uint[] { 0x30464243, 0x31464243, 0x32464243, 0x33464243 };
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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 (0x18);
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if (header.ToInt32 (0x10) != 1)
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return null;
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int compression = header[3] - '0';
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if (compression < 0 || compression > 3)
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return null;
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return new CbfMetaData {
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Width = header.ToUInt32 (4),
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Height = header.ToUInt32 (8),
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BPP = header.ToInt32 (12),
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Compression = compression,
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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 CbfReader (file, (CbfMetaData)info);
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var pixels = reader.Unpack();
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var alp_name = Path.ChangeExtension (file.Name, "alp");
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if (VFS.FileExists (alp_name))
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{
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try
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{
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using (var alp = VFS.OpenBinaryStream (alp_name))
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return ReadAlpha (alp, info, pixels);
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}
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catch { /* ignore mask read errors */ }
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}
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return ImageData.Create (info, PixelFormats.Bgr24, null, pixels);
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}
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ImageData ReadAlpha (IBinaryStream alp, ImageMetaData info, byte[] image)
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{
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var header = alp.ReadHeader (0x10);
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if (!header.AsciiEqual ("ALP1"))
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throw new InvalidFormatException();
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int unpacked_size = header.ToInt32 (8);
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var alpha = new byte[unpacked_size];
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int dst = 0;
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while (dst < alpha.Length)
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{
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byte a = alp.ReadUInt8();
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int count = alp.ReadUInt8();
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for (int i = 0; i < count; ++i)
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alpha[dst++] = a;
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}
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int dst_stride = (int)info.Width * 4;
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var pixels = new byte[dst_stride * (int)info.Height];
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int a_src = 0;
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int src = 0;
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for (dst = 0; dst < pixels.Length; dst += 4)
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{
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pixels[dst ] = image[src++];
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pixels[dst+1] = image[src++];
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pixels[dst+2] = image[src++];
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pixels[dst+3] = alpha[a_src++];
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}
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return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_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 ("CbfFormat.Write not implemented");
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}
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}
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internal class CbfReader
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{
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IBinaryStream m_input;
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byte[] m_output;
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int m_width;
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int m_height;
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int m_stride;
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int m_compression;
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public byte[] Data { get { return m_output; } }
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public CbfReader (IBinaryStream input, CbfMetaData info)
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{
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m_input = input;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_stride = 3 * m_width;
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m_output = new byte[m_stride * m_height];
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m_compression = info.Compression;
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}
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public byte[] Unpack ()
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{
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switch (m_compression)
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{
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case 0: UnpackV0(); break;
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case 1: UnpackV1(); break;
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case 2: UnpackV2(); break;
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case 3: UnpackV3(); break;
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default:
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throw new NotImplementedException (string.Format ("CBF compression {0} not implemented.", m_compression));
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}
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return m_output;
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}
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void UnpackV0 ()
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{
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m_input.Position = 0x18;
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m_input.Read (m_output, 0, m_output.Length);
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}
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void UnpackV1 ()
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{
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m_input.Position = 0x18;
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using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true))
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lzss.Read (m_output, 0, m_output.Length);
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for (int i = 3; i < m_output.Length; ++i)
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m_output[i] += m_output[i-3];
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var pixels = new byte[m_output.Length];
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int src = 0;
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var z_order = GetZigzagBlock();
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for (int y = 0; y < m_height; y += 8)
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for (int x = 0; x < m_stride; x += 24)
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{
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int dst = x + y * m_stride;
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for (int i = 0; i < 64; ++i)
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{
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int pos = z_order[i];
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pixels[dst + pos++] = m_output[src++];
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pixels[dst + pos++] = m_output[src++];
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pixels[dst + pos++] = m_output[src++];
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}
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}
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m_output = pixels;
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}
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void UnpackV2 ()
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{
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m_input.Position = 0x18;
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ReadRle (m_input.AsStream);
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}
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void UnpackV3 ()
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{
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m_input.Position = 0x1C;
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using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true))
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ReadRle (lzss);
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}
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void ReadRle (Stream input)
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{
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int dst = 0;
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while (dst < m_output.Length)
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{
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if (3 != input.Read (m_output, dst, 3))
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break;
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int count = input.ReadByte();
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if (count > 0)
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{
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count *= 3;
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Binary.CopyOverlapped (m_output, dst, dst+3, count-3);
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dst += count;
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}
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}
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}
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int[] GetZigzagBlock ()
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{
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var order = new int[64];
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for (int i = 0; i < 64; ++i)
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{
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order[i] = (ZigzagOrder[i] & 7) * 3 + (ZigzagOrder[i] >> 3) * m_stride;
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}
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return order;
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}
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readonly static byte[] ZigzagOrder = {
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0x00, 0x01, 0x08, 0x10, 0x09, 0x02, 0x03, 0x0A,
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0x11, 0x18, 0x20, 0x19, 0x12, 0x0B, 0x04, 0x05,
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0x0C, 0x13, 0x1A, 0x21, 0x28, 0x30, 0x29, 0x22,
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0x1B, 0x14, 0x0D, 0x06, 0x07, 0x0E, 0x15, 0x1C,
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0x23, 0x2A, 0x31, 0x38, 0x39, 0x32, 0x2B, 0x24,
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0x1D, 0x16, 0x0F, 0x17, 0x1E, 0x25, 0x2C, 0x33,
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0x3A, 0x3B, 0x34, 0x2D, 0x26, 0x1F, 0x27, 0x2E,
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0x35, 0x3C, 0x3D, 0x36, 0x2F, 0x37, 0x3E, 0x3F,
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};
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}
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}
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