mirror of
https://github.com/crskycode/GARbro.git
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1153 lines
48 KiB
C#
1153 lines
48 KiB
C#
//! \file ImageTLG.cs
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//! \date Thu Jul 17 21:31:39 2014
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//! \brief KiriKiri TLG image implementation.
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//---------------------------------------------------------------------------
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// TLG5/6 decoder
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// Copyright (C) 2000-2005 W.Dee <dee@kikyou.info> and contributors
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//
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// C# port by morkt
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//
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using System;
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using System.IO;
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using System.ComponentModel.Composition;
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using System.Windows.Media;
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using GameRes.Utility;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Text;
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namespace GameRes.Formats.KiriKiri
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{
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internal class TlgMetaData : ImageMetaData
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{
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public int Version;
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public int DataOffset;
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}
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[Export(typeof(ImageFormat))]
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public class TlgFormat : ImageFormat
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{
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public override string Tag { get { return "TLG"; } }
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public override string Description { get { return "KiriKiri game engine image format"; } }
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public override uint Signature { get { return 0x30474c54; } } // "TLG0"
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public TlgFormat ()
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{
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Extensions = new string[] { "tlg", "tlg5", "tlg6" };
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Signatures = new uint[] { 0x30474c54, 0x35474c54, 0x36474c54, 0x35474cAB };
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}
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x26);
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int offset = 0xf;
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if (!header.AsciiEqual ("TLG0.0\x00sds\x1a"))
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offset = 0;
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int version;
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if (!header.AsciiEqual (offset+6, "\x00raw\x1a"))
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return null;
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if (0xAB == header[offset])
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header[offset] = (byte)'T';
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if (header.AsciiEqual (offset, "TLG6.0"))
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version = 6;
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else if (header.AsciiEqual (offset, "TLG5.0"))
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version = 5;
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else if (header.AsciiEqual (offset, "XXXYYY"))
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{
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version = 5;
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header[offset+0x0C] ^= 0xAB;
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header[offset+0x10] ^= 0xAC;
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}
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else if (header.AsciiEqual (offset, "XXXZZZ"))
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{
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version = 6;
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header[offset+0x0F] ^= 0xAB;
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header[offset+0x13] ^= 0xAC;
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}
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else
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return null;
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int colors = header[offset+11];
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if (6 == version)
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{
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if (1 != colors && 4 != colors && 3 != colors)
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return null;
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if (header[offset+12] != 0 || header[offset+13] != 0 || header[offset+14] != 0)
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return null;
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offset += 15;
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}
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else
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{
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if (4 != colors && 3 != colors)
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return null;
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offset += 12;
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}
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return new TlgMetaData
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{
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Width = header.ToUInt32 (offset),
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Height = header.ToUInt32 (offset+4),
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BPP = colors*8,
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Version = version,
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DataOffset = offset+8,
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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 meta = (TlgMetaData)info;
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file.Position = meta.DataOffset;
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var image = ReadTlg (file, meta);
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int tail_size = (int)Math.Min (file.Length - file.Position, 512);
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if (tail_size > 8)
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{
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var tail = file.ReadBytes (tail_size);
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try
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{
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var blended_image = ApplyTags (image, meta, tail);
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if (null != blended_image)
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return blended_image;
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}
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catch (FileNotFoundException X)
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{
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Trace.WriteLine (string.Format ("{0}: {1}", X.Message, X.FileName), "[TlgFormat.Read]");
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}
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catch (Exception X)
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{
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Trace.WriteLine (X.Message, "[TlgFormat.Read]");
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}
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}
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PixelFormat format = 32 == meta.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
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return ImageData.Create (meta, format, null, image, (int)meta.Width * 4);
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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 ("TlgFormat.Write not implemented");
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}
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byte[] ReadTlg (IBinaryStream src, TlgMetaData info)
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{
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if (6 == info.Version)
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return ReadV6 (src, info);
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else
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return ReadV5 (src, info);
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}
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ImageData ApplyTags (byte[] image, TlgMetaData meta, byte[] tail)
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{
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int i = tail.Length - 8;
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while (i >= 0)
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{
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if ('s' == tail[i+3] && 'g' == tail[i+2] && 'a' == tail[i+1] && 't' == tail[i])
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break;
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--i;
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}
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if (i < 0)
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return null;
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var tags = new TagsParser (tail, i+4);
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if (!tags.Parse())
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return null;
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var base_name = tags.GetString (1);
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meta.OffsetX = tags.GetInt (2) & 0xFFFF;
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meta.OffsetY = tags.GetInt (3) & 0xFFFF;
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if (string.IsNullOrEmpty (base_name))
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return null;
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base_name = VFS.CombinePath (VFS.GetDirectoryName (meta.FileName), base_name);
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if (base_name == meta.FileName)
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return null;
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TlgMetaData base_info;
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byte[] base_image;
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using (var base_file = VFS.OpenBinaryStream (base_name))
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{
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base_info = ReadMetaData (base_file) as TlgMetaData;
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if (null == base_info)
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return null;
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base_info.FileName = base_name;
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base_file.Position = base_info.DataOffset;
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base_image = ReadTlg (base_file, base_info);
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}
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var pixels = BlendImage (base_image, base_info, image, meta);
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PixelFormat format = 32 == base_info.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
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return ImageData.Create (base_info, format, null, pixels, (int)base_info.Width*4);
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}
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byte[] BlendImage (byte[] base_image, ImageMetaData base_info, byte[] overlay, ImageMetaData overlay_info)
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{
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int dst_stride = (int)base_info.Width * 4;
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int src_stride = (int)overlay_info.Width * 4;
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int dst = overlay_info.OffsetY * dst_stride + overlay_info.OffsetX * 4;
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int src = 0;
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int gap = dst_stride - src_stride;
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for (uint y = 0; y < overlay_info.Height; ++y)
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{
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for (uint x = 0; x < overlay_info.Width; ++x)
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{
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byte src_alpha = overlay[src+3];
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if (src_alpha != 0)
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{
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if (0xFF == src_alpha || 0 == base_image[dst+3])
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{
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base_image[dst] = overlay[src];
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base_image[dst+1] = overlay[src+1];
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base_image[dst+2] = overlay[src+2];
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base_image[dst+3] = src_alpha;
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}
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else
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{
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// FIXME this blending algorithm is oversimplified.
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base_image[dst+0] = (byte)((overlay[src+0] * src_alpha
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+ base_image[dst+0] * (0xFF - src_alpha)) / 0xFF);
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base_image[dst+1] = (byte)((overlay[src+1] * src_alpha
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+ base_image[dst+1] * (0xFF - src_alpha)) / 0xFF);
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base_image[dst+2] = (byte)((overlay[src+2] * src_alpha
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+ base_image[dst+2] * (0xFF - src_alpha)) / 0xFF);
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base_image[dst+3] = (byte)Math.Max (src_alpha, base_image[dst+3]);
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}
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}
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dst += 4;
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src += 4;
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}
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dst += gap;
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}
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return base_image;
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}
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const int TVP_TLG6_H_BLOCK_SIZE = 8;
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const int TVP_TLG6_W_BLOCK_SIZE = 8;
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const int TVP_TLG6_GOLOMB_N_COUNT = 4;
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const int TVP_TLG6_LeadingZeroTable_BITS = 12;
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const int TVP_TLG6_LeadingZeroTable_SIZE = (1<<TVP_TLG6_LeadingZeroTable_BITS);
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byte[] ReadV6 (IBinaryStream src, TlgMetaData info)
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{
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int width = (int)info.Width;
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int height = (int)info.Height;
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int colors = info.BPP / 8;
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int max_bit_length = src.ReadInt32();
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int x_block_count = ((width - 1)/ TVP_TLG6_W_BLOCK_SIZE) + 1;
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int y_block_count = ((height - 1)/ TVP_TLG6_H_BLOCK_SIZE) + 1;
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int main_count = width / TVP_TLG6_W_BLOCK_SIZE;
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int fraction = width - main_count * TVP_TLG6_W_BLOCK_SIZE;
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var image_bits = new uint[height * width];
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var bit_pool = new byte[max_bit_length / 8 + 5];
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var pixelbuf = new uint[width * TVP_TLG6_H_BLOCK_SIZE + 1];
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var filter_types = new byte[x_block_count * y_block_count];
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var zeroline = new uint[width];
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var LZSS_text = new byte[4096];
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// initialize zero line (virtual y=-1 line)
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uint zerocolor = 3 == colors ? 0xff000000 : 0x00000000;
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for (var i = 0; i < width; ++i)
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zeroline[i] = zerocolor;
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uint[] prevline = zeroline;
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int prevline_index = 0;
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// initialize LZSS text (used by chroma filter type codes)
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int p = 0;
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for (uint i = 0; i < 32*0x01010101; i += 0x01010101)
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{
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for (uint j = 0; j < 16*0x01010101; j += 0x01010101)
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{
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LZSS_text[p++] = (byte)(i & 0xff);
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LZSS_text[p++] = (byte)(i >> 8 & 0xff);
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LZSS_text[p++] = (byte)(i >> 16 & 0xff);
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LZSS_text[p++] = (byte)(i >> 24 & 0xff);
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LZSS_text[p++] = (byte)(j & 0xff);
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LZSS_text[p++] = (byte)(j >> 8 & 0xff);
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LZSS_text[p++] = (byte)(j >> 16 & 0xff);
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LZSS_text[p++] = (byte)(j >> 24 & 0xff);
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}
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}
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// read chroma filter types.
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// chroma filter types are compressed via LZSS as used by TLG5.
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{
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int inbuf_size = src.ReadInt32();
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byte[] inbuf = src.ReadBytes (inbuf_size);
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if (inbuf_size != inbuf.Length)
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return null;
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TVPTLG5DecompressSlide (filter_types, inbuf, inbuf_size, LZSS_text, 0);
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}
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// for each horizontal block group ...
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for (int y = 0; y < height; y += TVP_TLG6_H_BLOCK_SIZE)
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{
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int ylim = y + TVP_TLG6_H_BLOCK_SIZE;
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if (ylim >= height) ylim = height;
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int pixel_count = (ylim - y) * width;
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// decode values
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for (int c = 0; c < colors; c++)
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{
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// read bit length
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int bit_length = src.ReadInt32();
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// get compress method
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int method = (bit_length >> 30) & 3;
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bit_length &= 0x3fffffff;
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// compute byte length
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int byte_length = bit_length / 8;
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if (0 != (bit_length % 8)) byte_length++;
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// read source from input
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src.Read (bit_pool, 0, byte_length);
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// decode values
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// two most significant bits of bitlength are
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// entropy coding method;
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// 00 means Golomb method,
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// 01 means Gamma method (not yet suppoted),
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// 10 means modified LZSS method (not yet supported),
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// 11 means raw (uncompressed) data (not yet supported).
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switch (method)
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{
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case 0:
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if (c == 0 && colors != 1)
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TVPTLG6DecodeGolombValuesForFirst (pixelbuf, pixel_count, bit_pool);
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else
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TVPTLG6DecodeGolombValues (pixelbuf, c*8, pixel_count, bit_pool);
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break;
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default:
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throw new InvalidFormatException ("Unsupported entropy coding method");
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}
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}
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// for each line
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int ft = (y / TVP_TLG6_H_BLOCK_SIZE) * x_block_count; // within filter_types
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int skipbytes = (ylim - y) * TVP_TLG6_W_BLOCK_SIZE;
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for (int yy = y; yy < ylim; yy++)
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{
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int curline = yy*width;
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int dir = (yy&1)^1;
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int oddskip = ((ylim - yy -1) - (yy-y));
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if (0 != main_count)
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{
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int start =
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((width < TVP_TLG6_W_BLOCK_SIZE) ? width : TVP_TLG6_W_BLOCK_SIZE) *
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(yy - y);
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TVPTLG6DecodeLineGeneric (
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prevline, prevline_index,
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image_bits, curline,
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width, 0, main_count,
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filter_types, ft,
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skipbytes,
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pixelbuf, start,
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zerocolor, oddskip, dir);
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}
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if (main_count != x_block_count)
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{
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int ww = fraction;
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if (ww > TVP_TLG6_W_BLOCK_SIZE) ww = TVP_TLG6_W_BLOCK_SIZE;
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int start = ww * (yy - y);
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TVPTLG6DecodeLineGeneric (
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prevline, prevline_index,
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image_bits, curline,
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width, main_count, x_block_count,
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filter_types, ft,
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skipbytes,
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pixelbuf, start,
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zerocolor, oddskip, dir);
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}
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prevline = image_bits;
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prevline_index = curline;
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}
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}
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int stride = width * 4;
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var pixels = new byte[height * stride];
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Buffer.BlockCopy (image_bits, 0, pixels, 0, pixels.Length);
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return pixels;
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}
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byte[] ReadV5 (IBinaryStream src, TlgMetaData info)
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{
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int width = (int)info.Width;
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int height = (int)info.Height;
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int colors = info.BPP / 8;
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int blockheight = src.ReadInt32();
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int blockcount = (height - 1) / blockheight + 1;
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// skip block size section
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src.Seek (blockcount * 4, SeekOrigin.Current);
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int stride = width * 4;
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var image_bits = new byte[height * stride];
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var text = new byte[4096];
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for (int i = 0; i < 4096; ++i)
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text[i] = 0;
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var inbuf = new byte[blockheight * width + 10];
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byte [][] outbuf = new byte[4][];
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for (int i = 0; i < colors; i++)
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outbuf[i] = new byte[blockheight * width + 10];
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int z = 0;
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int prevline = -1;
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for (int y_blk = 0; y_blk < height; y_blk += blockheight)
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{
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// read file and decompress
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for (int c = 0; c < colors; c++)
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{
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byte mark = src.ReadUInt8();
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int size;
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size = src.ReadInt32();
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if (mark == 0)
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{
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// modified LZSS compressed data
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if (size != src.Read (inbuf, 0, size))
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return null;
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z = TVPTLG5DecompressSlide (outbuf[c], inbuf, size, text, z);
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}
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else
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{
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// raw data
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src.Read (outbuf[c], 0, size);
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}
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}
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// compose colors and store
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int y_lim = y_blk + blockheight;
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if (y_lim > height) y_lim = height;
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int outbuf_pos = 0;
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for (int y = y_blk; y < y_lim; y++)
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{
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int current = y * stride;
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int current_org = current;
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if (prevline >= 0)
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{
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// not first line
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switch(colors)
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{
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case 3:
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TVPTLG5ComposeColors3To4 (image_bits, current, prevline,
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outbuf, outbuf_pos, width);
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break;
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case 4:
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TVPTLG5ComposeColors4To4 (image_bits, current, prevline,
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outbuf, outbuf_pos, width);
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break;
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}
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}
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else
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{
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// first line
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switch(colors)
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{
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case 3:
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for (int pr = 0, pg = 0, pb = 0, x = 0;
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x < width; x++)
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{
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int b = outbuf[0][outbuf_pos+x];
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int g = outbuf[1][outbuf_pos+x];
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int r = outbuf[2][outbuf_pos+x];
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b += g; r += g;
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image_bits[current++] = (byte)(pb += b);
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image_bits[current++] = (byte)(pg += g);
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image_bits[current++] = (byte)(pr += r);
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image_bits[current++] = 0xff;
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}
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break;
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case 4:
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for (int pr = 0, pg = 0, pb = 0, pa = 0, x = 0;
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x < width; x++)
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{
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int b = outbuf[0][outbuf_pos+x];
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int g = outbuf[1][outbuf_pos+x];
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int r = outbuf[2][outbuf_pos+x];
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int a = outbuf[3][outbuf_pos+x];
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b += g; r += g;
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image_bits[current++] = (byte)(pb += b);
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image_bits[current++] = (byte)(pg += g);
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image_bits[current++] = (byte)(pr += r);
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image_bits[current++] = (byte)(pa += a);
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}
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break;
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}
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}
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outbuf_pos += width;
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prevline = current_org;
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}
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}
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return image_bits;
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}
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void TVPTLG5ComposeColors3To4 (byte[] outp, int outp_index, int upper,
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byte[][] buf, int bufpos, int width)
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{
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byte pc0 = 0, pc1 = 0, pc2 = 0;
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byte c0, c1, c2;
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for (int x = 0; x < width; x++)
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{
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c0 = buf[0][bufpos+x];
|
|
c1 = buf[1][bufpos+x];
|
|
c2 = buf[2][bufpos+x];
|
|
c0 += c1; c2 += c1;
|
|
outp[outp_index++] = (byte)(((pc0 += c0) + outp[upper+0]) & 0xff);
|
|
outp[outp_index++] = (byte)(((pc1 += c1) + outp[upper+1]) & 0xff);
|
|
outp[outp_index++] = (byte)(((pc2 += c2) + outp[upper+2]) & 0xff);
|
|
outp[outp_index++] = 0xff;
|
|
upper += 4;
|
|
}
|
|
}
|
|
|
|
void TVPTLG5ComposeColors4To4 (byte[] outp, int outp_index, int upper,
|
|
byte[][] buf, int bufpos, int width)
|
|
{
|
|
byte pc0 = 0, pc1 = 0, pc2 = 0, pc3 = 0;
|
|
byte c0, c1, c2, c3;
|
|
for (int x = 0; x < width; x++)
|
|
{
|
|
c0 = buf[0][bufpos+x];
|
|
c1 = buf[1][bufpos+x];
|
|
c2 = buf[2][bufpos+x];
|
|
c3 = buf[3][bufpos+x];
|
|
c0 += c1; c2 += c1;
|
|
outp[outp_index++] = (byte)(((pc0 += c0) + outp[upper+0]) & 0xff);
|
|
outp[outp_index++] = (byte)(((pc1 += c1) + outp[upper+1]) & 0xff);
|
|
outp[outp_index++] = (byte)(((pc2 += c2) + outp[upper+2]) & 0xff);
|
|
outp[outp_index++] = (byte)(((pc3 += c3) + outp[upper+3]) & 0xff);
|
|
upper += 4;
|
|
}
|
|
}
|
|
|
|
int TVPTLG5DecompressSlide (byte[] outbuf, byte[] inbuf, int inbuf_size, byte[] text, int initialr)
|
|
{
|
|
int r = initialr;
|
|
uint flags = 0;
|
|
int o = 0;
|
|
for (int i = 0; i < inbuf_size; )
|
|
{
|
|
if (((flags >>= 1) & 256) == 0)
|
|
{
|
|
flags = (uint)(inbuf[i++] | 0xff00);
|
|
}
|
|
if (0 != (flags & 1))
|
|
{
|
|
int mpos = inbuf[i] | ((inbuf[i+1] & 0xf) << 8);
|
|
int mlen = (inbuf[i+1] & 0xf0) >> 4;
|
|
i += 2;
|
|
mlen += 3;
|
|
if (mlen == 18) mlen += inbuf[i++];
|
|
|
|
while (0 != mlen--)
|
|
{
|
|
outbuf[o++] = text[r++] = text[mpos++];
|
|
mpos &= (4096 - 1);
|
|
r &= (4096 - 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
byte c = inbuf[i++];
|
|
outbuf[o++] = c;
|
|
text[r++] = c;
|
|
r &= (4096 - 1);
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static uint tvp_make_gt_mask (uint a, uint b)
|
|
{
|
|
uint tmp2 = ~b;
|
|
uint tmp = ((a & tmp2) + (((a ^ tmp2) >> 1) & 0x7f7f7f7f) ) & 0x80808080;
|
|
tmp = ((tmp >> 7) + 0x7f7f7f7f) ^ 0x7f7f7f7f;
|
|
return tmp;
|
|
}
|
|
|
|
static uint tvp_packed_bytes_add (uint a, uint b)
|
|
{
|
|
uint tmp = (uint)((((a & b)<<1) + ((a ^ b) & 0xfefefefe) ) & 0x01010100);
|
|
return a+b-tmp;
|
|
}
|
|
|
|
static uint tvp_med2 (uint a, uint b, uint c)
|
|
{
|
|
/* do Median Edge Detector thx, Mr. sugi at kirikiri.info */
|
|
uint aa_gt_bb = tvp_make_gt_mask(a, b);
|
|
uint a_xor_b_and_aa_gt_bb = ((a ^ b) & aa_gt_bb);
|
|
uint aa = a_xor_b_and_aa_gt_bb ^ a;
|
|
uint bb = a_xor_b_and_aa_gt_bb ^ b;
|
|
uint n = tvp_make_gt_mask(c, bb);
|
|
uint nn = tvp_make_gt_mask(aa, c);
|
|
uint m = ~(n | nn);
|
|
return (n & aa) | (nn & bb) | ((bb & m) - (c & m) + (aa & m));
|
|
}
|
|
|
|
static uint tvp_med (uint a, uint b, uint c, uint v)
|
|
{
|
|
return tvp_packed_bytes_add (tvp_med2 (a, b, c), v);
|
|
}
|
|
|
|
static uint tvp_avg (uint a, uint b, uint c, uint v)
|
|
{
|
|
return tvp_packed_bytes_add ((((a&b) + (((a^b) & 0xfefefefe) >> 1)) + ((a^b)&0x01010101)), v);
|
|
}
|
|
|
|
delegate uint tvp_decoder (uint a, uint b, uint c, uint v);
|
|
|
|
void TVPTLG6DecodeLineGeneric (uint[] prevline, int prevline_index,
|
|
uint[] curline, int curline_index,
|
|
int width, int start_block, int block_limit,
|
|
byte[] filtertypes, int filtertypes_index,
|
|
int skipblockbytes,
|
|
uint[] inbuf, int inbuf_index,
|
|
uint initialp, int oddskip, int dir)
|
|
{
|
|
/*
|
|
chroma/luminosity decoding
|
|
(this does reordering, color correlation filter, MED/AVG at a time)
|
|
*/
|
|
uint p, up;
|
|
|
|
if (0 != start_block)
|
|
{
|
|
prevline_index += start_block * TVP_TLG6_W_BLOCK_SIZE;
|
|
curline_index += start_block * TVP_TLG6_W_BLOCK_SIZE;
|
|
p = curline[curline_index-1];
|
|
up = prevline[prevline_index-1];
|
|
}
|
|
else
|
|
{
|
|
p = up = initialp;
|
|
}
|
|
|
|
inbuf_index += skipblockbytes * start_block;
|
|
int step = 0 != (dir & 1) ? 1 : -1;
|
|
|
|
for (int i = start_block; i < block_limit; i++)
|
|
{
|
|
int w = width - i*TVP_TLG6_W_BLOCK_SIZE;
|
|
if (w > TVP_TLG6_W_BLOCK_SIZE) w = TVP_TLG6_W_BLOCK_SIZE;
|
|
int ww = w;
|
|
if (step == -1) inbuf_index += ww-1;
|
|
if (0 != (i & 1)) inbuf_index += oddskip * ww;
|
|
|
|
tvp_decoder decoder;
|
|
switch (filtertypes[filtertypes_index+i])
|
|
{
|
|
case 0:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, v);
|
|
break;
|
|
case 1:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, v);
|
|
break;
|
|
case 2:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (((v>>8)&0xff)<<8) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 3:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (((v>>8)&0xff)<<8) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 4:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 5:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 6:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 7:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 8:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 9:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 10:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 11:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 12:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 13:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 14:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 15:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 16:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 17:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 18:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 19:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 20:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 21:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 22:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 23:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 24:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 25:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 26:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 27:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 28:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff)+((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 29:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+(v&0xff)+((v>>8)&0xff)+((v>>16)&0xff))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v>>16)&0xff))<<8)) + (0xff & ((v&0xff)+((v>>8)&0xff)+((v>>16)&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 30:
|
|
decoder = (a, b, c, v) => tvp_med (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v&0xff)<<1))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v&0xff)<<1))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
case 31:
|
|
decoder = (a, b, c, v) => tvp_avg (a, b, c, (uint)
|
|
((0xff0000 & ((((v>>16)&0xff)+((v&0xff)<<1))<<16)) + (0xff00 & ((((v>>8)&0xff)+((v&0xff)<<1))<<8)) + (0xff & ((v&0xff))) + ((v&0xff000000))));
|
|
break;
|
|
default: return;
|
|
}
|
|
do {
|
|
uint u = prevline[prevline_index];
|
|
p = decoder (p, u, up, inbuf[inbuf_index]);
|
|
up = u;
|
|
curline[curline_index] = p;
|
|
curline_index++;
|
|
prevline_index++;
|
|
inbuf_index += step;
|
|
} while (0 != --w);
|
|
if (step == 1)
|
|
inbuf_index += skipblockbytes - ww;
|
|
else
|
|
inbuf_index += skipblockbytes + 1;
|
|
if (0 != (i&1)) inbuf_index -= oddskip * ww;
|
|
}
|
|
}
|
|
|
|
static class TVP_Tables
|
|
{
|
|
public static byte[] TVPTLG6LeadingZeroTable = new byte[TVP_TLG6_LeadingZeroTable_SIZE];
|
|
public static sbyte[,] TVPTLG6GolombBitLengthTable = new sbyte
|
|
[TVP_TLG6_GOLOMB_N_COUNT*2*128, TVP_TLG6_GOLOMB_N_COUNT];
|
|
static short[,] TVPTLG6GolombCompressed = new short[TVP_TLG6_GOLOMB_N_COUNT,9] {
|
|
{3,7,15,27,63,108,223,448,130,},
|
|
{3,5,13,24,51,95,192,384,257,},
|
|
{2,5,12,21,39,86,155,320,384,},
|
|
{2,3,9,18,33,61,129,258,511,},
|
|
/* Tuned by W.Dee, 2004/03/25 */
|
|
};
|
|
|
|
static TVP_Tables ()
|
|
{
|
|
TVPTLG6InitLeadingZeroTable();
|
|
TVPTLG6InitGolombTable();
|
|
}
|
|
|
|
static void TVPTLG6InitLeadingZeroTable ()
|
|
{
|
|
/* table which indicates first set bit position + 1. */
|
|
/* this may be replaced by BSF (IA32 instrcution). */
|
|
|
|
for (int i = 0; i < TVP_TLG6_LeadingZeroTable_SIZE; i++)
|
|
{
|
|
int cnt = 0;
|
|
int j;
|
|
for(j = 1; j != TVP_TLG6_LeadingZeroTable_SIZE && 0 == (i & j);
|
|
j <<= 1, cnt++);
|
|
cnt++;
|
|
if (j == TVP_TLG6_LeadingZeroTable_SIZE) cnt = 0;
|
|
TVPTLG6LeadingZeroTable[i] = (byte)cnt;
|
|
}
|
|
}
|
|
|
|
static void TVPTLG6InitGolombTable()
|
|
{
|
|
for (int n = 0; n < TVP_TLG6_GOLOMB_N_COUNT; n++)
|
|
{
|
|
int a = 0;
|
|
for (int i = 0; i < 9; i++)
|
|
{
|
|
for (int j = 0; j < TVPTLG6GolombCompressed[n,i]; j++)
|
|
TVPTLG6GolombBitLengthTable[a++,n] = (sbyte)i;
|
|
}
|
|
if(a != TVP_TLG6_GOLOMB_N_COUNT*2*128)
|
|
throw new Exception ("Invalid data initialization"); /* THIS MUST NOT BE EXECUETED! */
|
|
/* (this is for compressed table data check) */
|
|
}
|
|
}
|
|
}
|
|
|
|
void TVPTLG6DecodeGolombValuesForFirst (uint[] pixelbuf, int pixel_count, byte[] bit_pool)
|
|
{
|
|
/*
|
|
decode values packed in "bit_pool".
|
|
values are coded using golomb code.
|
|
|
|
"ForFirst" function do dword access to pixelbuf,
|
|
clearing with zero except for blue (least siginificant byte).
|
|
*/
|
|
int bit_pool_index = 0;
|
|
|
|
int n = TVP_TLG6_GOLOMB_N_COUNT - 1; /* output counter */
|
|
int a = 0; /* summary of absolute values of errors */
|
|
|
|
int bit_pos = 1;
|
|
bool zero = 0 == (bit_pool[bit_pool_index] & 1);
|
|
|
|
for (int pixel = 0; pixel < pixel_count; )
|
|
{
|
|
/* get running count */
|
|
int count;
|
|
|
|
{
|
|
uint t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
int b = TVP_Tables.TVPTLG6LeadingZeroTable[t & (TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
int bit_count = b;
|
|
while (0 == b)
|
|
{
|
|
bit_count += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pos += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count += b;
|
|
}
|
|
bit_pos += b;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
|
|
bit_count --;
|
|
count = 1 << bit_count;
|
|
count += ((LittleEndian.ToInt32 (bit_pool, bit_pool_index) >> (bit_pos)) & (count-1));
|
|
|
|
bit_pos += bit_count;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
}
|
|
if (zero)
|
|
{
|
|
/* zero values */
|
|
|
|
/* fill distination with zero */
|
|
do { pixelbuf[pixel++] = 0; } while (0 != --count);
|
|
|
|
zero = !zero;
|
|
}
|
|
else
|
|
{
|
|
/* non-zero values */
|
|
|
|
/* fill distination with glomb code */
|
|
|
|
do
|
|
{
|
|
int k = TVP_Tables.TVPTLG6GolombBitLengthTable[a,n];
|
|
int v, sign;
|
|
|
|
uint t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
int bit_count;
|
|
int b;
|
|
if (0 != t)
|
|
{
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count = b;
|
|
while (0 == b)
|
|
{
|
|
bit_count += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pos += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count += b;
|
|
}
|
|
bit_count --;
|
|
}
|
|
else
|
|
{
|
|
bit_pool_index += 5;
|
|
bit_count = bit_pool[bit_pool_index-1];
|
|
bit_pos = 0;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index);
|
|
b = 0;
|
|
}
|
|
|
|
v = (int)((bit_count << k) + ((t >> b) & ((1<<k)-1)));
|
|
sign = (v & 1) - 1;
|
|
v >>= 1;
|
|
a += v;
|
|
pixelbuf[pixel++] = (byte)((v ^ sign) + sign + 1);
|
|
|
|
bit_pos += b;
|
|
bit_pos += k;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
|
|
if (--n < 0)
|
|
{
|
|
a >>= 1;
|
|
n = TVP_TLG6_GOLOMB_N_COUNT - 1;
|
|
}
|
|
} while (0 != --count);
|
|
zero = !zero;
|
|
}
|
|
}
|
|
}
|
|
|
|
void TVPTLG6DecodeGolombValues (uint[] pixelbuf, int offset, int pixel_count, byte[] bit_pool)
|
|
{
|
|
/*
|
|
decode values packed in "bit_pool".
|
|
values are coded using golomb code.
|
|
*/
|
|
uint mask = (uint)~(0xff << offset);
|
|
int bit_pool_index = 0;
|
|
|
|
int n = TVP_TLG6_GOLOMB_N_COUNT - 1; /* output counter */
|
|
int a = 0; /* summary of absolute values of errors */
|
|
|
|
int bit_pos = 1;
|
|
bool zero = 0 == (bit_pool[bit_pool_index] & 1);
|
|
|
|
for (int pixel = 0; pixel < pixel_count; )
|
|
{
|
|
/* get running count */
|
|
int count;
|
|
|
|
{
|
|
uint t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
int b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
int bit_count = b;
|
|
while (0 == b)
|
|
{
|
|
bit_count += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pos += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count += b;
|
|
}
|
|
bit_pos += b;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
|
|
bit_count --;
|
|
count = 1 << bit_count;
|
|
count += (int)((LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> (bit_pos)) & (count-1));
|
|
|
|
bit_pos += bit_count;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
}
|
|
if (zero)
|
|
{
|
|
/* zero values */
|
|
|
|
/* fill distination with zero */
|
|
do { pixelbuf[pixel++] &= mask; } while (0 != --count);
|
|
|
|
zero = !zero;
|
|
}
|
|
else
|
|
{
|
|
/* non-zero values */
|
|
|
|
/* fill distination with glomb code */
|
|
|
|
do
|
|
{
|
|
int k = TVP_Tables.TVPTLG6GolombBitLengthTable[a,n];
|
|
int v, sign;
|
|
|
|
uint t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
int bit_count;
|
|
int b;
|
|
if (0 != t)
|
|
{
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count = b;
|
|
while (0 == b)
|
|
{
|
|
bit_count += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pos += TVP_TLG6_LeadingZeroTable_BITS;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index) >> bit_pos;
|
|
b = TVP_Tables.TVPTLG6LeadingZeroTable[t&(TVP_TLG6_LeadingZeroTable_SIZE-1)];
|
|
bit_count += b;
|
|
}
|
|
bit_count --;
|
|
}
|
|
else
|
|
{
|
|
bit_pool_index += 5;
|
|
bit_count = bit_pool[bit_pool_index-1];
|
|
bit_pos = 0;
|
|
t = LittleEndian.ToUInt32 (bit_pool, bit_pool_index);
|
|
b = 0;
|
|
}
|
|
|
|
v = (int)((bit_count << k) + ((t >> b) & ((1<<k)-1)));
|
|
sign = (v & 1) - 1;
|
|
v >>= 1;
|
|
a += v;
|
|
uint c = (uint)((pixelbuf[pixel] & mask) | (uint)((byte)((v ^ sign) + sign + 1) << offset));
|
|
pixelbuf[pixel++] = c;
|
|
|
|
bit_pos += b;
|
|
bit_pos += k;
|
|
bit_pool_index += bit_pos >> 3;
|
|
bit_pos &= 7;
|
|
|
|
if (--n < 0)
|
|
{
|
|
a >>= 1;
|
|
n = TVP_TLG6_GOLOMB_N_COUNT - 1;
|
|
}
|
|
} while (0 != --count);
|
|
zero = !zero;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class TagsParser
|
|
{
|
|
byte[] m_tags;
|
|
Dictionary<int, Tuple<int, int>> m_map = new Dictionary<int, Tuple<int, int>>();
|
|
int m_offset;
|
|
|
|
public TagsParser (byte[] tags, int offset)
|
|
{
|
|
m_tags = tags;
|
|
m_offset = offset;
|
|
}
|
|
|
|
public bool Parse ()
|
|
{
|
|
int length = LittleEndian.ToInt32 (m_tags, m_offset);
|
|
m_offset += 4;
|
|
if (length <= 0 || length > m_tags.Length - m_offset)
|
|
return false;
|
|
while (m_offset < m_tags.Length)
|
|
{
|
|
int key_len = ParseInt();
|
|
if (key_len < 0)
|
|
return false;
|
|
int key;
|
|
switch (key_len)
|
|
{
|
|
case 1:
|
|
key = m_tags[m_offset];
|
|
break;
|
|
case 2:
|
|
key = LittleEndian.ToUInt16 (m_tags, m_offset);
|
|
break;
|
|
case 4:
|
|
key = LittleEndian.ToInt32 (m_tags, m_offset);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
m_offset += key_len + 1;
|
|
int value_len = ParseInt();
|
|
if (value_len < 0)
|
|
return false;
|
|
m_map[key] = Tuple.Create (m_offset, value_len);
|
|
m_offset += value_len + 1;
|
|
}
|
|
return m_map.Count > 0;
|
|
}
|
|
|
|
int ParseInt ()
|
|
{
|
|
int colon = Array.IndexOf (m_tags, (byte)':', m_offset);
|
|
if (-1 == colon)
|
|
return -1;
|
|
var len_str = Encoding.ASCII.GetString (m_tags, m_offset, colon-m_offset);
|
|
m_offset = colon + 1;
|
|
return Int32.Parse (len_str);
|
|
}
|
|
|
|
public int GetInt (int key)
|
|
{
|
|
var val = m_map[key];
|
|
switch (val.Item2)
|
|
{
|
|
case 0: return 0;
|
|
case 1: return m_tags[val.Item1];
|
|
case 2: return LittleEndian.ToUInt16 (m_tags, val.Item1);
|
|
case 4: return LittleEndian.ToInt32 (m_tags, val.Item1);
|
|
default: throw new InvalidFormatException();
|
|
}
|
|
}
|
|
|
|
public string GetString (int key)
|
|
{
|
|
var val = m_map[key];
|
|
return Encodings.cp932.GetString (m_tags, val.Item1, val.Item2);
|
|
}
|
|
}
|
|
}
|