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reorganized project directory structure.
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morkt
209
ArcFormats/RiddleSoft/ImageGCP.cs
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209
ArcFormats/RiddleSoft/ImageGCP.cs
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//! \file ImageGCP.cs
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//! \date Fri Feb 20 14:26:51 2015
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//! \brief GCP image format implementation.
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//
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// Copyright (C) 2015 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.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Text;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats.Riddle
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{
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internal class GcpMetaData : ImageMetaData
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{
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public int DataSize;
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public int PackedSize;
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}
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[Export(typeof(ImageFormat))]
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public class GcpFormat : ImageFormat
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{
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public override string Tag { get { return "GCP"; } }
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public override string Description { get { return "Riddle Soft RGB image format"; } }
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public override uint Signature { get { return 0x31504d43u; } } // 'CMP1'
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public override void Write (Stream file, ImageData image)
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{
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throw new NotImplementedException ("GcpFormat.Write not implemented");
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[12];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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int data_size = LittleEndian.ToInt32 (header, 4);
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int pack_size = LittleEndian.ToInt32 (header, 8);
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if (data_size < 54)
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return null;
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using (var reader = new Reader (stream, pack_size, 0x22)) // BMP header
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{
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reader.Unpack();
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var bmp = reader.Data;
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if (bmp[0] != 'B' || bmp[1] != 'M')
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return null;
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int width = LittleEndian.ToInt32 (bmp, 0x12);
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int height = LittleEndian.ToInt32 (bmp, 0x16);
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int bpp = LittleEndian.ToInt16 (bmp, 0x1c);
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return new GcpMetaData
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{
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Width = (uint)width,
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Height = (uint)height,
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BPP = bpp,
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DataSize = data_size,
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PackedSize = pack_size,
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};
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as GcpMetaData;
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if (null == meta)
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throw new ArgumentException ("GcpFormat.Read should be supplied with GcpMetaData", "info");
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stream.Position = 12;
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using (var reader = new Reader (stream, meta.PackedSize, meta.DataSize))
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{
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reader.Unpack();
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using (var bmp = new MemoryStream (reader.Data, false))
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{
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var decoder = new BmpBitmapDecoder (bmp,
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BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
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BitmapSource frame = decoder.Frames[0];
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frame.Freeze();
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return new ImageData (frame, info);
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}
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}
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}
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}
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internal class Reader : IDisposable
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{
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Stream m_input;
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byte[] m_output;
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int m_src_count = 0;
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int m_src_total;
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public byte[] Data { get { return m_output; } }
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public Reader (Stream file, int src_size, int dst_size)
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{
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m_input = file;
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m_output = new byte[dst_size];
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m_src_total = src_size;
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}
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public void Unpack ()
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{
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int dst = 0;
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var shift = new byte[0x800];
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int edi = 0x7ef;
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for (int i = 0; i < edi; ++i)
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shift[i] = 0x20;
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while (dst < m_output.Length)
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{
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int bit = GetNextBit();
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if (-1 == bit)
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break;
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if (1 == bit)
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{
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int data = GetBits (8);
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if (-1 == data)
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break;
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m_output[dst++] = (byte)data;
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shift[edi++] = (byte)data;
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edi &= 0x7ff;
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}
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else
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{
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int offset = GetBits (11); // [esp+10]
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if (-1 == offset)
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break;
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int count = GetBits (4);
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if (-1 == count)
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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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byte data = shift[(offset + i) & 0x7ff];
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m_output[dst++] = data;
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shift[edi++] = data;
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edi &= 0x7ff;
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if (m_output.Length == dst)
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return;
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}
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}
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}
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}
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int m_bits = 0;
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int GetNextBit ()
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{
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bool bit = 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 (m_src_count++ >= m_src_total)
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return -1;
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m_bits = m_input.ReadByte();
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if (-1 == m_bits)
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throw new EndOfStreamException ("Invalid compressed stream");
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bit = 0 != (m_bits & 0x80);
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m_bits = (m_bits << 1) | 1;
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}
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return bit ? 1 : 0;
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}
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int GetBits (int count, int data = 0)
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{
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while (count > 0)
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{
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int bit = GetNextBit();
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if (-1 == bit)
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return -1;
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data = (data << 1) | bit;
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--count;
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}
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return data;
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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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if (null != m_input)
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{
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m_input = null;
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}
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GC.SuppressFinalize (this);
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}
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#endregion
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}
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}
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