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355 lines
12 KiB
C#
355 lines
12 KiB
C#
//! \file ImageLIM.cs
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//! \date Fri Apr 15 12:16:20 2016
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//! \brief Liar-soft LIM image format implementation.
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//
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// Copyright (C) 2015-2016 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media;
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using GameRes.Utility;
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namespace GameRes.Formats.Liar
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{
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internal class LimMetaData : ImageMetaData
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{
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public int Flags;
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}
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[Export(typeof(ImageFormat))]
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public class LimFormat : ImageFormat
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{
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public override string Tag { get { return "LIM"; } }
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public override string Description { get { return "Liar-soft image format"; } }
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public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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if (0x4C != file.ReadByte() || 0x4D != file.ReadByte())
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return null;
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int flag = file.ReadUInt16();
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if ((flag & 0xF) != 2 && (flag & 0xF) != 3)
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return null;
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int bpp = 0x10 == file.ReadUInt16() ? 16 : 32;
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var meta = new LimMetaData { BPP = bpp, Flags = flag };
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file.ReadUInt16();
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meta.Width = file.ReadUInt32();
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meta.Height = file.ReadUInt32();
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return meta;
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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 Reader (file, (LimMetaData)info))
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{
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Data);
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}
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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 ("LimFormat.Write not implemented");
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}
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internal class Reader : IDisposable
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{
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IBinaryStream m_input;
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byte[] m_output;
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byte[] m_index;
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byte[] m_image;
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int m_width;
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int m_height;
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int m_bpp;
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int m_flags;
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public byte[] Data { get { return m_image; } }
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public PixelFormat Format { get; private set; }
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public Reader (IBinaryStream file, LimMetaData info)
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{
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m_input = file;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_bpp = info.BPP;
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m_flags = info.Flags;
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if (32 == m_bpp)
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Format = PixelFormats.Bgra32;
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else if (16 == m_bpp)
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Format = PixelFormats.Bgr565;
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else
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throw new InvalidFormatException();
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m_image = new byte[m_width*m_height*m_bpp/8];
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}
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int m_remaining;
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int m_current;
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int m_bits;
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public void Unpack ()
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{
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m_input.Position = 0x10;
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if (32 == m_bpp)
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{
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Unpack32bpp();
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}
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else
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{
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if (0 != (m_flags & 0x10))
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{
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if (0 != (m_flags & 0xE0))
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Unpack16bpp();
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else
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m_input.Read (m_image, 0, m_image.Length);
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}
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if (0 != (m_flags & 0x100))
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{
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if (0 != (m_flags & 0xE00))
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{
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m_output = null;
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UnpackChannel (3);
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}
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else
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m_output = m_input.ReadBytes (m_width * m_height);
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ApplyAlpha (m_output);
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}
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}
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}
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void Unpack32bpp ()
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{
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byte mask = 0xFF;
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for (int i = 3; i >= 0; --i)
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{
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UnpackChannel (3);
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int src = 0;
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for (int p = i; p < m_image.Length; p += 4)
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{
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m_image[p] = (byte)(m_output[src++] ^ mask);
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}
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mask = 0;
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}
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}
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void Unpack16bpp ()
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{
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int image_size = m_input.ReadInt32();
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m_output = m_image;
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m_remaining = m_input.ReadInt32();
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int index_size = m_input.ReadUInt16() * 2;
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if (null == m_index || index_size > m_index.Length)
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m_index = new byte[index_size];
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m_input.ReadInt16(); // ignored
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if (index_size != m_input.Read (m_index, 0, index_size))
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throw new InvalidFormatException ("Unexpected end of file");
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int card;
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if (index_size > 8192)
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{
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m_index_threshold = 14;
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m_index_length_limit = 16;
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card = 4;
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}
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else
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{
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m_index_threshold = 6;
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m_index_length_limit = 12;
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card = 3;
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}
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m_current = 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 bits = GetBits (card);
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if (-1 == bits)
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break;
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if (0 != bits)
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{
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int index = GetIndex (bits);
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if (index < 0)
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break;
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if (dst + 1 >= m_output.Length)
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break;
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m_output[dst++] = m_index[index*2];
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m_output[dst++] = m_index[index*2+1];
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}
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else
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{
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int count = GetBits (4);
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if (-1 == count)
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break;
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bits = GetBits (card);
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if (-1 == bits)
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break;
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int index = GetIndex (bits);
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if (-1 == index)
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break;
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count += 2;
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index *= 2;
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for (int i = 0; i < count; i++)
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{
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if (dst + 1 >= m_output.Length)
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return;
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m_output[dst++] = m_index[index];
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m_output[dst++] = m_index[index+1];
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}
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}
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}
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}
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void ApplyAlpha (byte[] alpha)
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{
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var pixels = new byte[m_width*m_height*4];
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int alpha_src = 0;
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int dst = 0;
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for (int i = 0; i < m_image.Length; i += 2)
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{
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int color = LittleEndian.ToUInt16 (m_image, i);
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pixels[dst++] = (byte)((color & 0x001F) * 0xFF / 0x1F);
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pixels[dst++] = (byte)((color & 0x07E0) * 0xFF / 0x7E0);
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pixels[dst++] = (byte)((color & 0xF800) * 0xFF / 0xF800);
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pixels[dst++] = (byte)~alpha[alpha_src++];
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}
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m_image = pixels;
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Format = PixelFormats.Bgra32;
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}
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void UnpackChannel (int card)
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{
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m_index_threshold = 6;
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m_index_length_limit = 12;
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int channel_size = m_input.ReadInt32();
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if (null == m_output || m_output.Length < channel_size)
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m_output = new byte[channel_size];
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m_remaining = m_input.ReadInt32();
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int index_size = m_input.ReadUInt16();
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if (null == m_index || index_size > m_index.Length)
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m_index = new byte[index_size];
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m_input.ReadInt16(); // ignored
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if (index_size != m_input.Read (m_index, 0, index_size))
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throw new InvalidFormatException ("Unexpected end of file");
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m_current = 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 bits = GetBits (card);
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if (-1 == bits)
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break;
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if (0 != bits)
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{
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int index = GetIndex (bits);
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if (index < 0)
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break;
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if (dst + 1 >= m_output.Length)
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break;
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m_output[dst++] = m_index[index];
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}
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else
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{
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int count = GetBits (4);
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if (-1 == count)
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break;
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bits = GetBits (card);
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if (-1 == bits)
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break;
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int index = GetIndex (bits);
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if (-1 == index)
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break;
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count += 2;
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for (int i = 0; i < count; i++)
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{
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if (dst >= m_output.Length)
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return;
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m_output[dst++] = m_index[index];
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}
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}
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}
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}
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private int GetBits (int n)
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{
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int v = 0;
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while (n > 0)
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{
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if (0 == m_current)
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{
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if (0 == m_remaining)
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return 0;
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m_bits = m_input.ReadByte();
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--m_remaining;
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m_current = 8;
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}
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v <<= 1;
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m_bits <<= 1;
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v |= (m_bits >> 8) & 1;
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--m_current;
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--n;
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}
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return v;
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}
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int m_index_threshold;
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int m_index_length_limit;
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private int GetIndex (int bits)
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{
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if (bits <= m_index_threshold)
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{
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if (0 == bits)
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return -1;
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if (1 == bits--)
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return GetBits (1);
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return (1 << bits) | GetBits (bits);
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}
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for (int i = m_index_threshold; i < m_index_length_limit; ++i)
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{
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bits = GetBits (1);
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if (-1 == bits)
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return -1;
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if (0 == bits)
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return (1 << i) | GetBits (i);
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}
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return -1;
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}
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#region IDisposable Members
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public void Dispose ()
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{
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}
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#endregion
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}
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}
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}
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