mirror of
https://github.com/crskycode/GARbro.git
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276 lines
9.7 KiB
C#
276 lines
9.7 KiB
C#
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//! \file ImageGCmp.cs
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//! \date 2017 Dec 01
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//! \brief Nekotaro Game System compressed 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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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats.Nekotaro
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{
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[Export(typeof(ImageFormat))]
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public class GCmpFormat : ImageFormat
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{
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public override string Tag { get { return "GCMP"; } }
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public override string Description { get { return "Nekotaro Game System image format"; } }
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public override uint Signature { get { return 0x706D4347; } } // 'GCmp'
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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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int bpp = header[12];
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if (bpp != 24 && bpp != 8 && bpp != 1)
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return null;
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return new ImageMetaData {
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Width = header.ToUInt16 (8),
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Height = header.ToUInt16 (10),
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BPP = bpp,
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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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using (var reader = new GCmpDecoder (file, info, this, true))
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return reader.Image;
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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 ("GCmpFormat.Write not implemented");
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}
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}
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internal sealed class GCmpDecoder : IImageDecoder
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{
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IBinaryStream m_input;
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ImageData m_image;
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bool m_should_dispose;
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public Stream Source { get { return m_input.AsStream; } }
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public ImageFormat SourceFormat { get; private set; }
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public ImageMetaData Info { get; private set; }
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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; private set; }
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public ImageData Image {
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get {
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if (null == m_image)
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{
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var pixels = Unpack();
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m_image = ImageData.CreateFlipped (Info, Format, Palette, pixels, Stride);
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}
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return m_image;
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}
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}
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public GCmpDecoder (IBinaryStream input, ImageMetaData info, ImageFormat source, bool leave_open = false)
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{
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m_input = input;
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Info = info;
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SourceFormat = source;
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m_should_dispose = !leave_open;
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if (info.BPP > 1)
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Stride = (int)info.Width * info.BPP / 8;
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else
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Stride = ((int)info.Width + 7) / 8;
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}
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public byte[] Unpack ()
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{
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m_input.Position = 0x10;
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if (24 == Info.BPP)
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return Unpack24bpp();
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else
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return Unpack8bpp();
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}
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byte[] Unpack24bpp ()
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{
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Format = PixelFormats.Bgr24;
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int pixel_count = (int)(Info.Width * Info.Height);
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var output = new byte[pixel_count * Info.BPP / 8 + 1];
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var frame = new byte[384];
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int dst = 0;
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int v19 = 0;
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while (pixel_count > 0)
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{
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int count, frame_pos, pixel;
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if (v19 != 0)
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{
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pixel = m_input.ReadInt24();
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count = 1;
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frame_pos = 127;
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--v19;
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}
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else
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{
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count = m_input.ReadUInt8();
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int lo = count & 0x1F;
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if (0 != (count & 0x80))
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{
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count = ((byte)count >> 5) & 3;
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if (count != 0)
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{
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frame_pos = lo;
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}
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else
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{
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count = lo << 1;
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frame_pos = m_input.ReadUInt8();
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if (0 != (frame_pos & 0x80))
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++count;
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frame_pos &= 0x7F;
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}
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if (0 == count)
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{
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count = m_input.ReadInt32();
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}
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int fpos = 3 * frame_pos;
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pixel = frame[fpos] | frame[fpos+1] << 8 | frame[fpos+2] << 16;
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}
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else
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{
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if (1 == count)
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{
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v19 = m_input.ReadUInt8() - 1;
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}
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else if (0 == count)
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{
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count = m_input.ReadInt32();
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}
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pixel = m_input.ReadInt24();
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frame_pos = 127;
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}
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}
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if (count > pixel_count)
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count = pixel_count;
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pixel_count -= count;
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LittleEndian.Pack (pixel, output, dst);
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dst += 3;
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if (--count > 0)
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{
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count *= 3;
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Binary.CopyOverlapped (output, dst - 3, dst, count);
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dst += count;
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}
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if (frame_pos != 0)
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Buffer.BlockCopy (frame, 0, frame, 3, 3 * frame_pos);
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frame[0] = (byte)pixel;
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frame[1] = (byte)(pixel >> 8);
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frame[2] = (byte)(pixel >> 16);
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}
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return output;
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}
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byte[] Unpack8bpp ()
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{
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Format = 8 == Info.BPP ? PixelFormats.Gray8 : PixelFormats.BlackWhite;
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int pixel_count = (int)Info.Height * Stride;
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var output = new byte[pixel_count];
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int dst = 0;
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byte[] frame = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0xFF };
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int count = pixel_count;
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int extra_count = pixel_count;
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while (pixel_count > 0)
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{
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byte pixel;
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int frame_pos;
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byte ctl = m_input.ReadUInt8();
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int hi = ctl >> 4;
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int lo = ctl & 0xF;
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if (hi != 0)
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{
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frame_pos = hi - 1;
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pixel = frame[frame_pos];
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count = lo + 1;
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}
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else
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{
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switch (lo)
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{
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default:
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count = lo + 1;
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break;
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case 10:
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count = m_input.ReadUInt8() + 11;
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break;
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case 11:
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count = m_input.ReadUInt16() + 267;
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break;
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case 12:
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count = m_input.ReadInt32() + 65803;
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break;
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case 13:
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extra_count = 0x10;
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count = m_input.ReadUInt8();
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break;
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case 14:
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extra_count = 0x120;
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count = m_input.ReadUInt16();
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break;
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case 15:
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extra_count = 0x10130;
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count = m_input.ReadInt32();
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break;
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}
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pixel = m_input.ReadUInt8();
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if (lo < 13)
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{
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frame_pos = 14;
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}
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else
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{
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lo = pixel & 0xF;
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frame_pos = (pixel >> 4) - 1;
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pixel = frame[frame_pos];
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count = extra_count + 16 * count + lo + 1;
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}
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}
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if (count > pixel_count)
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count = pixel_count;
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pixel_count -= count;
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for (int i = 0; i < count; ++i)
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output[dst++] = pixel;
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Buffer.BlockCopy (frame, 0, frame, 1, frame_pos);
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frame[0] = pixel;
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}
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return output;
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}
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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 && m_should_dispose)
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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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