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280 lines
10 KiB
C#
280 lines
10 KiB
C#
//! \file ImageCandy.cs
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//! \date 2018 Aug 24
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//! \brief Candy 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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using GameRes.Utility;
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namespace GameRes.Formats.Interheart
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{
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internal class CandyMetaData : ImageMetaData
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{
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public int Colors;
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public int HeaderSize;
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public int Version;
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}
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[Export(typeof(ImageFormat))]
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public class CandyFormat : ImageFormat
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{
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public override string Tag { get { return "EPF"; } }
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public override string Description { get { return "Candy Soft image format"; } }
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public override uint Signature { get { return 0; } }
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public CandyFormat ()
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{
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Signatures = new uint[] { 0x0E00, 0x80020A00, 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 (14);
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int header_size = BigEndian.ToUInt16 (header, 0);
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CandyMetaData info;
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if (14 == header_size)
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{
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info = new CandyMetaData {
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OffsetX = BigEndian.ToInt16 (header, 2),
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OffsetY = BigEndian.ToInt16 (header, 4),
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Width = BigEndian.ToUInt16 (header, 6),
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Height = BigEndian.ToUInt16 (header, 8),
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BPP = header[0xA],
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Colors = BigEndian.ToUInt16 (header, 0xC),
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Version = header[0xB],
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HeaderSize = header_size,
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};
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}
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else if (10 == header_size)
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{
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info = new CandyMetaData {
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Width = BigEndian.ToUInt16 (header, 2),
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Height = BigEndian.ToUInt16 (header, 4),
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BPP = header[6],
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Colors = BigEndian.ToUInt16 (header, 8),
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Version = header[7],
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HeaderSize = header_size,
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};
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}
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else
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return null;
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if (info.Version != 1 && info.Version != 2 || info.BPP < 1 || info.BPP > 32)
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return null;
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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 CandyDecoder (file, (CandyMetaData)info);
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var pixels = reader.Unpack();
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return ImageData.Create (info, reader.Format, reader.Palette, 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 System.NotImplementedException ("CandyFormat.Write not implemented");
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}
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}
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internal class CandyDecoder
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{
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IBinaryStream m_input;
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CandyMetaData m_info;
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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_colors;
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int m_pixel_size;
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public PixelFormat Format { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public int Stride { get { return m_stride; } }
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public CandyDecoder (IBinaryStream input, CandyMetaData info)
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{
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m_input = input;
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m_info = info;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_colors = info.Colors;
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if (24 == info.BPP || (32 == info.BPP && 1 == info.Version))
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{
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m_pixel_size = 3;
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m_stride = m_width * 3;
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Format = PixelFormats.Bgr24;
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}
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else if (32 == info.BPP)
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{
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m_pixel_size = 4;
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m_stride = m_width * 4;
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Format = PixelFormats.Bgra32;
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}
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else if (1 == info.BPP)
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{
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m_pixel_size = 1;
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m_stride = (m_width + 7) / 8;
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Format = PixelFormats.Indexed1;
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}
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else
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{
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m_pixel_size = 1;
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m_stride = m_width;
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Format = PixelFormats.Indexed8;
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}
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m_output = new byte[m_stride * m_height];
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}
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public byte[] Unpack ()
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{
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m_input.Position = m_info.HeaderSize;
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if (m_colors > 0)
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Palette = ReadPalette();
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LzUnpack();
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if (1 == m_info.BPP)
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return m_output;
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return RestorePixels();
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}
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byte[] RestorePixels ()
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{
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var pixels = new byte[m_output.Length];
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int src = 0;
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int block_size = m_info.BPP == 8 ? 144 : 80;
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for (int block_y = 0; block_y < m_height; block_y += block_size)
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for (int block_x = 0; block_x < m_width; block_x += block_size)
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{
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int dst_col = block_y * m_stride + block_x * m_pixel_size;
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int block_height = Math.Min (block_size, m_height - block_y);
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int block_width = Math.Min (block_size, m_width - block_x);
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for (int x = 0; x < block_width; ++x)
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{
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int dst = dst_col;
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for (int y = 0; y < block_height; ++y)
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{
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if (m_pixel_size > 3)
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{
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pixels[dst+3] = m_output[src ];
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pixels[dst+2] = m_output[src+1];
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pixels[dst+1] = m_output[src+2];
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pixels[dst ] = m_output[src+3];
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}
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else if (1 == m_pixel_size)
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{
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pixels[dst] = m_output[src];
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}
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else
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{
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pixels[dst+2] = m_output[src ];
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pixels[dst+1] = m_output[src+1];
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pixels[dst ] = m_output[src+2];
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}
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dst += m_stride;
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src += m_pixel_size;
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}
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dst_col += m_pixel_size;
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}
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}
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return pixels;
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}
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void LzUnpack ()
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{
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var bits = new byte[16];
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var frame = new byte[0x1000];
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int frame_pos = 0;
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int dst = 0;
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while (dst < m_output.Length)
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{
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int ctl = m_input.ReadByte();
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if (-1 == ctl)
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break;
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bits[0] = (byte)(ctl & 1);
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bits[1] = 1;
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int count = 0;
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for (int i = 1; i < 8; ++i)
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{
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ctl >>= 1;
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if (bits[2*count] == (ctl & 1))
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{
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++bits[2*count + 1];
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}
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else
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{
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++count;
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bits[2*count] = (byte)(ctl & 1);
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bits[2*count + 1] = 1;
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}
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}
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for (int i = 0; i <= count && dst < m_output.Length; ++i)
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{
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int bpos = 2*i;
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if (bits[bpos++] != 0)
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{
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while (bits[bpos] > 0)
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{
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byte b = m_input.ReadUInt8();
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m_output[dst++] = frame[frame_pos++ & 0xFFF] = b;
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--bits[bpos];
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}
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}
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else
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{
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while (bits[bpos] > 0 && dst < m_output.Length)
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{
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int offset = m_input.ReadUInt16();
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int zcount = Math.Min ((offset & 0xF) + 3, m_output.Length - dst);
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offset >>= 4;
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for (int j = 0; j < zcount; ++j)
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{
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byte b = frame[offset++ & 0xFFF];
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m_output[dst++] = frame[frame_pos++ & 0xFFF] = b;
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}
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--bits[bpos];
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}
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}
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}
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}
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}
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BitmapPalette ReadPalette ()
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{
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var palette_data = new byte[4 * m_colors];
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if (palette_data.Length != m_input.Read (palette_data, 0, palette_data.Length))
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throw new EndOfStreamException();
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int src = 0;
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var color_map = new Color[m_colors];
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for (int i = 0; i < m_colors; ++i)
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{
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color_map[i] = Color.FromRgb (palette_data[src+1], palette_data[src+2], palette_data[src+3]);
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src += 4;
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}
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return new BitmapPalette (color_map);
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}
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}
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}
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