2014-07-22 03:26:28 +08:00
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//! \file ImageWCG.cs
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//! \date Sat Jul 19 23:07:32 2014
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//! \brief Liar-soft WCG image format implementation.
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//
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2014-07-28 04:50:18 +08:00
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// Copyright (C) 2014 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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2014-07-22 03:26:28 +08:00
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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 System.Windows.Media.Imaging;
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using System.Collections.Generic;
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using System.Text;
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namespace GameRes.Formats
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{
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[Export(typeof(ImageFormat))]
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public class WcgFormat : ImageFormat
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{
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public override string Tag { get { return "WCG"; } }
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public override string Description { get { return "Liar-soft proprietary image format"; } }
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public override uint Signature { get { return 0x02714757; } }
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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if (0x57 != stream.ReadByte() || 0x47 != stream.ReadByte())
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return null;
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using (var file = new BinaryReader (stream, Encoding.ASCII, true))
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{
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uint flags = file.ReadUInt16();
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if (1 != (flags & 0x0f) || 0x20 != file.ReadByte() || 0 != file.ReadByte())
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return null;
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var meta = new ImageMetaData();
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file.BaseStream.Position = 8;
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meta.Width = file.ReadUInt32();
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meta.Height = file.ReadUInt32();
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meta.BPP = 32;
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return meta;
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}
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}
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public override ImageData Read (Stream file, ImageMetaData info)
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{
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uint pixel_size = info.Width * info.Height;
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using (var reader = new Reader (file, pixel_size))
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{
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reader.Unpack();
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byte[] pixels = reader.Data;
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var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, 96, 96,
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PixelFormats.Bgra32, null, pixels, (int)info.Width*4);
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bitmap.Freeze();
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return new ImageData (bitmap, info);
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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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Stream stream = file;
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bool buffer_used = false;
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if (!stream.CanSeek)
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{
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stream = new MemoryStream();
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buffer_used = true;
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}
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try
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{
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using (var writer = new Writer (stream, image.Bitmap))
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{
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writer.Pack();
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}
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if (buffer_used)
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{
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stream.Position = 0;
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stream.CopyTo (file);
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}
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}
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finally
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{
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if (buffer_used)
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stream.Dispose();
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}
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}
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private class Reader : IDisposable
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{
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private byte[] m_data;
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private BinaryReader m_input;
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private uint m_input_size;
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private ushort[] m_index;
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private uint m_next_ptr;
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private uint m_next_size;
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private uint m_src;
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private uint m_src_size;
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private uint m_dst_size;
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private uint esi;
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private uint edi;
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private uint m_index_length_limit;
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private int m_bits;
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public byte[] Data { get { return m_data; } }
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public Reader (Stream file, uint pixel_size)
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{
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m_data = new byte[pixel_size*4];
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m_input_size = (uint)file.Length;
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m_input = new BinaryReader (file, Encoding.ASCII, true);
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}
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public void Unpack ()
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{
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m_next_ptr = 16;
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m_next_size = m_input_size-16;
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if (Unpack (2))
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Unpack (0);
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for (uint i = 3; i < m_data.Length; i += 4)
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m_data[i] = (byte)~m_data[i];
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}
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private bool Unpack (uint offset)
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{
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m_src = m_next_ptr;
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m_src_size = m_next_size;
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m_dst_size = (uint)(m_data.Length / 4);
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if (m_src_size < 12)
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throw new InvalidFormatException ("Invalid file size");
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m_src_size -= 12;
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m_input.BaseStream.Position = m_next_ptr;
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uint unpacked_size = m_input.ReadUInt32();
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uint data_size = m_input.ReadUInt32();
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uint index_size = m_input.ReadUInt16(); // 8
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if (unpacked_size != m_dst_size*2)
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throw new InvalidFormatException ("Invalid image size");
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if (0 == index_size || index_size*2 > m_src_size)
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throw new InvalidFormatException ("Invalid palette size");
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m_src_size -= index_size*2;
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if (data_size > m_src_size)
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throw new InvalidFormatException ("Invalid compressed data size");
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esi = m_src + index_size*2 + 12;
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edi = offset;
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m_next_size = m_src_size - data_size;
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m_next_ptr = esi + data_size;
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m_src_size = data_size;
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return DecodeStream (index_size);
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}
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void ReadIndex (uint index_size)
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{
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m_input.BaseStream.Position = m_src+12;
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m_index = new ushort[index_size];
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for (int i = 0; i < index_size; ++i)
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m_index[i] = m_input.ReadUInt16();
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}
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bool DecodeStream (uint index_size)
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{
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ReadIndex (index_size);
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m_input.BaseStream.Position = esi;
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bool small_index = index_size < 0x1002;
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m_index_length_limit = small_index ? 0x06u : 0x0eu;
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uint index_bit_length = small_index ? 3u : 4u;
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m_bits = 0;
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while (m_dst_size > 0)
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{
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uint dst_count = 1;
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uint index_length = GetBits (index_bit_length, 0);
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if (0 == index_length)
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{
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dst_count = GetBits (4, 0) + 2;
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index_length = GetBits (index_bit_length, 0);
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}
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if (0 == index_length)
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return false; // std::cerr << "zero index length\n";
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uint index = GetIndex (index_length);
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if (index >= index_size)
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return false; // std::cerr << "invalid index\n";
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if (dst_count > m_dst_size)
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return false;
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m_dst_size -= dst_count;
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ushort word = m_index[index];
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do {
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PutWord (word); // *(uint16_t*)edi = word;
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edi += 4;
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} while (0 != --dst_count);
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}
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return true;
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}
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void PutWord (ushort word)
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{
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m_data[edi ] = (byte)(word & 0xff);
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m_data[edi+1] = (byte)(word >> 8);
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}
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bool GetNextBit ()
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{
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bool carry = 0 != (m_bits & 0x80);
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m_bits <<= 1;
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if (0 == (m_bits & 0xff))
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{
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if (0 == m_src_size--)
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throw new InvalidFormatException ("Unexpected end of file");
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m_bits = (int)m_input.ReadByte();
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esi++;
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m_bits = (m_bits << 1) + 1;
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carry = 0 != (m_bits & 0x100);
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}
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return carry;
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}
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uint GetIndex (uint count)
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{
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if (0 == --count)
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return GetNextBit() ? 1u : 0u;
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if (count < m_index_length_limit)
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return GetBits (count, 1);
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while (GetNextBit())
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{
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if (count >= 0x10)
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throw new InvalidFormatException ("Invalid index count");
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++count;
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}
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return GetBits (count, 1);
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}
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uint GetBits (uint count, uint word)
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{
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do
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{
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bool carry = GetNextBit();
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word = (word << 1) + (carry ? 1u : 0u);
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}
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while (0 != --count);
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return word;
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}
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#region IDisposable Members
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bool disposed = false;
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public void Dispose ()
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{
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Dispose (true);
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GC.SuppressFinalize (this);
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}
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protected virtual void Dispose (bool disposing)
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{
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if (!disposed)
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{
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if (disposing)
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m_input.Dispose();
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m_input = null;
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m_data = null;
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m_index = null;
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disposed = true;
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}
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}
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#endregion
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}
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private class Writer : IDisposable
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{
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private BinaryWriter m_out;
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private uint m_width;
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private uint m_height;
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private uint m_pixels;
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private byte[] m_data;
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Dictionary<ushort, ushort> m_index = new Dictionary<ushort, ushort>();
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private uint m_base_length;
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private uint m_base_index_length;
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private int m_bits;
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public Writer (Stream stream, BitmapSource bitmap)
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{
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m_width = (uint)bitmap.PixelWidth;
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m_height = (uint)bitmap.PixelHeight;
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m_pixels = m_width*m_height;
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if (bitmap.Format != PixelFormats.Bgra32)
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{
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var converted_bitmap = new FormatConvertedBitmap();
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converted_bitmap.BeginInit();
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converted_bitmap.Source = bitmap;
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converted_bitmap.DestinationFormat = PixelFormats.Bgra32;
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converted_bitmap.EndInit();
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bitmap = converted_bitmap;
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}
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m_data = new byte[m_pixels*4];
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bitmap.CopyPixels (m_data, bitmap.PixelWidth*4, 0);
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m_out = new BinaryWriter (stream, Encoding.ASCII, true);
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}
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public void Pack ()
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{
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byte[] header = { (byte)'W', (byte)'G', 0x71, 2, 0x20, 0, 0, 0x40 };
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m_out.Write (header, 0, header.Length);
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m_out.Write (m_width);
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m_out.Write (m_height);
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Pack (1, 0xff00);
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Pack (0, 0);
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}
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ushort GetWord (int offset)
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{
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return (ushort)(m_data[offset*2] | m_data[offset*2+1] << 8);
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}
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private void Pack (int data, ushort mask)
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{
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var header_pos = m_out.Seek (0, SeekOrigin.Current);
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|
|
m_out.Seek (12, SeekOrigin.Current);
|
|
|
|
|
|
|
|
|
|
BuildIndex (data, mask);
|
|
|
|
|
bool small_index = m_index.Count < 0x1002;
|
|
|
|
|
m_base_length = small_index ? 3u : 4u;
|
|
|
|
|
m_base_index_length = small_index ? 7u : 15u;
|
|
|
|
|
m_bits = 1;
|
|
|
|
|
|
|
|
|
|
// encode
|
|
|
|
|
for (uint i = 0; i < m_pixels;)
|
|
|
|
|
{
|
|
|
|
|
ushort word = GetWord (data);
|
|
|
|
|
data += 2;
|
|
|
|
|
++i;
|
|
|
|
|
ushort color = m_index[(ushort)(word^mask)];
|
|
|
|
|
uint count = 1;
|
|
|
|
|
while (i < m_pixels)
|
|
|
|
|
{
|
|
|
|
|
if (word != GetWord (data))
|
|
|
|
|
break;
|
|
|
|
|
++count;
|
|
|
|
|
data += 2;
|
|
|
|
|
++i;
|
|
|
|
|
if (0x11 == count)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (count > 1)
|
|
|
|
|
{
|
|
|
|
|
PutBits (m_base_length, 0);
|
|
|
|
|
PutBits (4, count-2);
|
|
|
|
|
}
|
|
|
|
|
PutIndex (color);
|
|
|
|
|
}
|
|
|
|
|
Flush();
|
|
|
|
|
|
|
|
|
|
var end_pos = m_out.Seek (0, SeekOrigin.Current);
|
|
|
|
|
uint data_size = (uint)(end_pos - header_pos - 12 - m_index.Count*2);
|
|
|
|
|
m_out.Seek ((int)header_pos, SeekOrigin.Begin);
|
|
|
|
|
m_out.Write (m_pixels*2u);
|
|
|
|
|
m_out.Write (data_size);
|
|
|
|
|
m_out.Write ((ushort)m_index.Count);
|
|
|
|
|
m_out.Write ((ushort)(small_index ? 7 : 14)); // 0x0e
|
|
|
|
|
m_out.Seek ((int)end_pos, SeekOrigin.Begin);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void BuildIndex (int data, ushort mask)
|
|
|
|
|
{
|
|
|
|
|
m_index.Clear();
|
|
|
|
|
uint[] freq_table = new uint[65536];
|
|
|
|
|
for (var data_end = data + m_pixels*2; data < data_end; data += 2)
|
|
|
|
|
freq_table[GetWord (data)^mask]++;
|
|
|
|
|
|
|
|
|
|
var index = new List<ushort>();
|
|
|
|
|
for (int i = 0; i < freq_table.Length; ++i)
|
|
|
|
|
{
|
|
|
|
|
if (0 != freq_table[i])
|
|
|
|
|
index.Add ((ushort)i);
|
|
|
|
|
}
|
|
|
|
|
index.Sort ((a, b) => freq_table[a] < freq_table[b] ? 1 : freq_table[a] == freq_table[b] ? 0 : -1);
|
|
|
|
|
ushort j = 0;
|
|
|
|
|
foreach (var color in index)
|
|
|
|
|
{
|
|
|
|
|
m_out.Write (color);
|
|
|
|
|
m_index.Add (color, j++);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Flush ()
|
|
|
|
|
{
|
|
|
|
|
if (1 != m_bits)
|
|
|
|
|
{
|
|
|
|
|
do
|
|
|
|
|
m_bits <<= 1;
|
|
|
|
|
while (0 == (m_bits & 0x100));
|
|
|
|
|
m_out.Write ((byte)(m_bits & 0xff));
|
|
|
|
|
m_bits = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void PutBit (bool bit)
|
|
|
|
|
{
|
|
|
|
|
m_bits <<= 1;
|
|
|
|
|
m_bits |= bit ? 1 : 0;
|
|
|
|
|
if (0 != (m_bits & 0x100))
|
|
|
|
|
{
|
|
|
|
|
m_out.Write ((byte)(m_bits & 0xff));
|
|
|
|
|
m_bits = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void PutBits (uint length, uint x)
|
|
|
|
|
{
|
|
|
|
|
x <<= (int)(32-length);
|
|
|
|
|
while (0 != length--)
|
|
|
|
|
{
|
|
|
|
|
PutBit (0 != (x & 0x80000000));
|
|
|
|
|
x <<= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static uint GetBitsLength (ushort val)
|
|
|
|
|
{
|
|
|
|
|
uint length = 0;
|
|
|
|
|
do
|
|
|
|
|
{
|
|
|
|
|
++length;
|
|
|
|
|
val >>= 1;
|
|
|
|
|
}
|
|
|
|
|
while (0 != val);
|
|
|
|
|
return length;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void PutIndex (ushort index)
|
|
|
|
|
{
|
|
|
|
|
uint length = GetBitsLength (index);
|
|
|
|
|
|
|
|
|
|
if (length < m_base_index_length)
|
|
|
|
|
{
|
|
|
|
|
PutBits (m_base_length, length);
|
|
|
|
|
if (1 == length)
|
|
|
|
|
PutBit (index != 0);
|
|
|
|
|
else
|
|
|
|
|
PutBits (length-1, index);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
PutBits (m_base_length, m_base_index_length);
|
|
|
|
|
for (uint i = m_base_index_length; i < length; ++i)
|
|
|
|
|
PutBit (true);
|
|
|
|
|
PutBit (false);
|
|
|
|
|
PutBits (length-1, index);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#region IDisposable Members
|
|
|
|
|
bool disposed = false;
|
|
|
|
|
|
|
|
|
|
public void Dispose ()
|
|
|
|
|
{
|
|
|
|
|
Dispose (true);
|
|
|
|
|
GC.SuppressFinalize (this);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
|
|
|
{
|
|
|
|
|
if (!disposed)
|
|
|
|
|
{
|
|
|
|
|
if (disposing)
|
|
|
|
|
m_out.Dispose();
|
|
|
|
|
m_out = null;
|
|
|
|
|
m_data = null;
|
|
|
|
|
m_index = null;
|
|
|
|
|
disposed = true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endregion
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
