mirror of
https://github.com/crskycode/GARbro.git
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362 lines
12 KiB
C#
362 lines
12 KiB
C#
//! \file ImageFD.cs
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//! \date 2019 Mar 27
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//! \brief Mink compressed bitmap format.
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//
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// Copyright (C) 2019 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.Mink
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{
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[Export(typeof(ImageFormat))]
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public class FdFormat : ImageFormat
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{
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public override string Tag { get { return "BMP/FD"; } }
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public override string Description { get { return "Mink compressed bitmap format"; } }
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public override uint Signature { get { return 0; } }
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public FdFormat ()
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{
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Signatures = new uint[] { 0x00186446, 0x00184446, 0x00206446, 0 };
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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 (0x10);
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if (header[0] != 'F' || (header[1] & 0x5F) != 'D' || header[3] > 1)
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return null;
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int bpp = header[2];
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if (bpp != 24 && bpp != 32)
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return null;
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return new FcMetaData {
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Width = header.ToUInt16 (4),
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Height = header.ToUInt16 (6),
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BPP = bpp,
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Flag = header[3],
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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 FdReader (file, (FcMetaData)info);
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return reader.Unpack();
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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 ("FdFormat.Write not implemented");
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}
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}
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internal class FdReader
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{
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IBinaryStream m_input;
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FcMetaData m_info;
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public FdReader (IBinaryStream input, FcMetaData info)
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{
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m_input = input;
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m_info = info;
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}
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public ImageData Unpack ()
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{
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m_input.Position = 16;
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var output = new uint[m_info.iWidth * m_info.iHeight];
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UnpackRgb (output);
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if (32 == m_info.BPP)
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UnpackAlpha (output);
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PixelFormat format = 32 == m_info.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
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return ImageData.CreateFlipped (m_info, format, null, output, m_info.iWidth * 4);
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}
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byte m_cur_bits;
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void UnpackRgb (uint[] output)
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{
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InitOffsetTable();
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int dst = 0;
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m_cur_bits = 0x80;
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while (dst < output.Length)
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{
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int ctl = ReadNext();
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int code = ControlTable[ctl - 2];
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if (code < 20)
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{
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if (code < 2)
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{
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uint pixel = (uint)m_input.ReadUInt8() << 24;
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pixel += (uint)m_input.ReadUInt8() << 16;
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pixel += (uint)m_input.ReadUInt8() << 8;
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pixel ^= 0x80000080;
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pixel >>= FlowMap5[m_cur_bits];
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output[dst++] = (pixel >> 8) ^ ((uint)m_cur_bits << 16);
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m_cur_bits = (byte)pixel;
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}
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else
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{
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int pixel = (int)output[dst + m_offset_table[code - 2]];
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int r = ReadNext();
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pixel += (((r - 2) << 15) ^ -((r & 1) << 15));
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int g = ReadNext();
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pixel += (((g - 2) << 7) ^ -((g & 1) << 7));
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int b = ReadNext();
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output[dst++] = (uint)((((b - 2) ^ -(b & 1)) >> 1) + pixel);
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}
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}
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else // code >= 20
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{
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int y = ReadNext();
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int x = ReadNext();
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int src = dst + (((y & 1) - 1) ^ (x - 2)) - m_info.iWidth * ((y >> 1) + (y & 1) - 1);
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int count = ReadNext() - 1;
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if (code == 38)
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{
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while (count --> 0)
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{
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output[dst++] = output[src++];
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}
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}
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else
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{
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int offset = m_offset_table[code - 20]; // dword_5D51F8[code];
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while (count --> 0)
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{
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uint pixel = output[src] + output[dst + offset] - output[src + offset];
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output[dst++] = pixel;
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++src;
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}
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}
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}
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}
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}
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void UnpackAlpha (uint[] output)
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{
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int dst = 0;
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while (dst < output.Length)
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{
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int shift = 8 - FlowMap5[m_cur_bits];
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uint ctl, alpha;
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if (shift <= 0)
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{
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alpha = m_cur_bits;
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ctl = 0;
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}
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else
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{
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ctl = (uint)m_cur_bits >> shift;
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if (shift > 8)
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{
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int v94 = ((shift - 9) >> 3) + 1;
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do
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{
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ctl <<= 8;
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ctl += m_input.ReadUInt8();
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shift -= 8;
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--v94;
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}
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while (v94 > 0);
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}
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m_cur_bits = m_input.ReadUInt8();
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alpha = (ctl << shift) + ((uint)m_cur_bits >> (8 - shift));
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ctl &= ~0xFFu;
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ctl |= ((uint)(m_cur_bits << shift) + (1u << (shift - 1))) & 0xFFu;
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}
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m_cur_bits = (byte)ctl;
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ctl &= 0xFFu;
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int v96 = FlowMap3[m_cur_bits];
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m_cur_bits = FlowMap1[m_cur_bits];
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if (0 == m_cur_bits)
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{
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do
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{
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m_cur_bits = m_input.ReadUInt8();
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v96 += FlowMap4[m_cur_bits];
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}
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while (0 == FlowMap2[m_cur_bits]);
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m_cur_bits = FlowMap2[m_cur_bits];
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}
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int v98 = FlowMap5[m_cur_bits];
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int count, bits;
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if (v96 <= v98)
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{
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count = (m_cur_bits + 256) >> (8 - v96);
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bits = m_cur_bits << v96;
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}
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else // v96 > v98
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{
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int v99 = v96 - v98;
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int v100 = (m_cur_bits + 256) >> (8 - v98);
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if (v99 > 8)
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{
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int v101 = (int)(((uint)(v99 - 9) >> 3) + 1);
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v99 -= v101 << 3;
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do
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{
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v100 = m_input.ReadUInt8() + (v100 << 8);
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--v101;
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}
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while (v101 > 0);
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}
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m_cur_bits = m_input.ReadUInt8();
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count = (int)((v100 << v99) + ((uint)m_cur_bits >> (8 - v99)));
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bits = (m_cur_bits << v99) + (1 << (v99 - 1));
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}
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m_cur_bits = (byte)bits;
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count = Math.Min (count - 1, output.Length - dst);
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alpha <<= 24;
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while (count --> 0)
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{
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uint px = output[dst] & 0xFFFFFFu;
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output[dst++] = px | alpha;
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}
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}
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}
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int ReadNext ()
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{
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int shift = FlowMap3[m_cur_bits];
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m_cur_bits = FlowMap1[m_cur_bits];
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if (0 == m_cur_bits)
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{
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do
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{
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m_cur_bits = m_input.ReadUInt8();
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shift += FlowMap4[m_cur_bits];
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}
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while (0 == FlowMap2[m_cur_bits]);
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m_cur_bits = FlowMap2[m_cur_bits];
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}
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int bits = m_cur_bits + 256;
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int v12 = FlowMap5[m_cur_bits];
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if (shift > v12)
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{
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bits <<= v12;
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bits &= ~0xFF;
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bits += m_input.ReadUInt8();
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shift -= v12 + 1;
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if (shift >= 8)
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{
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int count = shift >> 3;
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shift -= count << 3;
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do
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{
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bits += m_input.ReadUInt8();
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bits <<= 8;
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--count;
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}
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while (count > 0);
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}
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bits = bits << 1 | 1;
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shift &= 0xFF;
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}
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bits <<= shift;
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m_cur_bits = (byte)bits;
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return bits >> 8;
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}
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int[] m_offset_table = new int[18];
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static readonly sbyte[] OffsetsX = { -1, 0, 1, -1, 0, -2, 0, -3, 0, -4, 0, -5, 0, -6, 0, -7, 0, -8 };
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static readonly sbyte[] OffsetsY = { 0, -1, -1, -1, -2, 0, -3, 0, -4, 0, -5, 0, -6, 0, -7, 0, -8, 0 };
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static readonly byte[] ControlTable = new byte[38];
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static readonly byte[] ControlMap = new byte[] {
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2, 1, 0, 3, 4, 5, 10, 11, 12, 13, 14, 15, 22, 23, 24, 25, 26, 27, 28, 29,
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6, 8, 7, 9, 16, 17, 18, 19, 20, 21, 30, 31, 32, 33, 34, 35, 36, 37
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};
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void InitOffsetTable ()
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{
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for (int i = 0; i < 18; ++i)
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{
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m_offset_table[i] = OffsetsX[i] + m_info.iWidth * OffsetsY[i];
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}
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}
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static readonly byte[] FlowMap1 = new byte[256];
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static readonly byte[] FlowMap2 = new byte[256];
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static readonly byte[] FlowMap3 = new byte[256];
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static readonly byte[] FlowMap4 = new byte[256];
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static readonly byte[] FlowMap5 = new byte[256];
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static FdReader ()
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{
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for (int i = 0; i < 38; ++i)
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{
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if (1 == i)
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ControlTable[1] = 38;
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else
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ControlTable[ControlMap[i]] = (byte)i;
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}
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for (int i = 0; i < 256; ++i)
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{
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sbyte v = (sbyte)i;
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byte n = 0;
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if (i > 0)
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{
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while (v < 0)
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{
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v <<= 1;
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++n;
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}
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v <<= 1;
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if (0 == v)
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--n;
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}
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FlowMap1[i] = (byte)v;
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FlowMap3[i] = ++n;
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v = (sbyte)i;
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n = 0;
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if (i > 0)
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{
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while (v < 0)
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{
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v <<= 1;
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++n;
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}
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v <<= 1;
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}
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FlowMap4[i] = n;
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FlowMap2[i] = (byte)(v + (1 << n));
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v = (sbyte)i;
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n = 0;
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while ((v & 0x7F) != 0)
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{
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v <<= 1;
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++n;
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}
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FlowMap5[i] = n;
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}
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}
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}
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}
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