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474 lines
17 KiB
C#
474 lines
17 KiB
C#
//! \file ImageGCC.cs
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//! \date Mon Jun 29 05:12:05 2015
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//! \brief Ai5Win engine image format.
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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.Diagnostics;
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using System.IO;
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using System.Windows.Media;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Elf
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{
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internal class GccMetaData : ImageMetaData
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{
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public uint Signature;
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}
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[Export(typeof(ImageFormat))]
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public class GccFormat : ImageFormat
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{
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public override string Tag { get { return "GCC"; } }
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public override string Description { get { return "AI5WIN engine image format"; } }
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public override uint Signature { get { return 0x6d343252; } } // 'R24m'
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public GccFormat ()
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{
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// 'R24m', 'R24n', 'G24m', 'G24n'
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Signatures = new uint[] { 0x6d343252, 0x6E343252, 0x6D343247, 0x6E343247 };
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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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return new GccMetaData
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{
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Width = LittleEndian.ToUInt16 (header, 8),
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Height = LittleEndian.ToUInt16 (header, 10),
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BPP = 'm' == header[3] ? 32 : 24,
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OffsetX = LittleEndian.ToInt16 (header, 4),
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OffsetY = LittleEndian.ToInt16 (header, 6),
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Signature = LittleEndian.ToUInt32 (header, 0),
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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 GccMetaData;
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if (null == meta)
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throw new ArgumentException ("GccFormat.Read should be supplied with GccMetaData", "info");
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var reader = new Reader (stream, meta);
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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 ("GccFormat.Write not implemented");
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}
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internal class Reader
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{
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byte[] m_input;
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GccMetaData m_info;
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byte[] m_output;
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int m_width;
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int m_height;
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int m_alpha_w;
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int m_alpha_h;
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public PixelFormat Format { get; private set; }
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public byte[] Data { get { return m_output; } }
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public Reader (Stream input, GccMetaData info)
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{
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m_input = new byte[input.Length];
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input.Read (m_input, 0, m_input.Length);
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m_info = info;
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m_width = (int)m_info.Width;
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m_height = (int)m_info.Height;
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}
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public void Unpack ()
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{
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switch (m_info.Signature)
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{
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case 0x6E343247: UnpackNormal (LzssUnpack); break; // G24n
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case 0x6D343247: UnpackMasked (LzssUnpack); break; // G24m
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case 0x6E343252: UnpackNormal (AltUnpack); break; // R24n
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case 0x6D343252: UnpackMasked (AltUnpack); break; // R24m
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default: throw new NotSupportedException();
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}
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}
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private void UnpackNormal (Action<int> unpacker)
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{
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unpacker (0x14);
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FlipPixels (m_width*3);
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Format = PixelFormats.Bgr24;
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}
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private void UnpackMasked (Action<int> unpacker)
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{
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unpacker (0x20);
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var alpha = UnpackAlpha();
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if (m_alpha_w < (m_info.OffsetX + m_width) || m_alpha_h < (m_info.OffsetY + m_height))
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{
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FlipPixels (m_width*3);
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Format = PixelFormats.Bgr24;
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}
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else
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{
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Convert24To32 (alpha);
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Format = PixelFormats.Bgra32;
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}
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}
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private void FlipPixels (int stride)
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{
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// flip pixels vertically
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var pixels = new byte[m_output.Length];
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int dst = 0;
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for (int src = stride * (m_height-1); src >= 0; src -= stride)
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{
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Buffer.BlockCopy (m_output, src, pixels, dst, stride);
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dst += stride;
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}
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m_output = pixels;
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}
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private void Convert24To32 (byte[] alpha)
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{
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Debug.Assert (m_alpha_w >= (m_info.OffsetX + m_width) && m_alpha_h >= (m_info.OffsetY + m_height));
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int src_stride = m_width * 3;
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var pixels = new byte[m_width * m_height * 4];
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int dst = 0;
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int alpha_row = m_alpha_w * (m_alpha_h - m_info.OffsetY - 1);
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for (int row = m_width * (m_height-1); row >= 0; row -= m_width)
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{
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int src = row*3;
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for (int x = 0; x < m_width; ++x)
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{
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pixels[dst++] = m_output[src++];
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pixels[dst++] = m_output[src++];
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pixels[dst++] = m_output[src++];
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pixels[dst++] = alpha[alpha_row + m_info.OffsetX + x];
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}
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alpha_row -= m_alpha_w;
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}
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m_output = pixels;
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}
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void LzssUnpack (int offset)
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{
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int out_length = m_width * m_height * 3;
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using (var input = new MemoryStream (m_input, offset, m_input.Length-offset))
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using (var lzss = new LzssReader (input, (int)input.Length, out_length))
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{
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lzss.Unpack();
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m_output = lzss.Data;
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}
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}
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int m_index;
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int m_current;
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int m_mask;
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void ResetBitInput (int idx)
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{
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m_index = idx;
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m_mask = 0x80;
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}
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bool NextBit ()
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{
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m_mask <<= 1;
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if (0x100 == m_mask)
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{
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m_current = m_input[m_index++];
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m_mask = 1;
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}
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return 0 != (m_current & m_mask);
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}
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byte[] UnpackAlpha () // sub_444FF0
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{
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m_alpha_w = LittleEndian.ToUInt16 (m_input, 0x18);
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m_alpha_h = LittleEndian.ToUInt16 (m_input, 0x1A);
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int total = m_alpha_w * m_alpha_h;
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var alpha = new byte[total];
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int offset = 0x20 + LittleEndian.ToInt32 (m_input, 0x0C);
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ResetBitInput (offset);
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int src = offset + LittleEndian.ToInt32 (m_input, 0x1C);
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int dst = 0;
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while (dst < total)
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{
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if (NextBit())
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{
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int count = ReadCount();
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byte v = m_input[src++];
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for (int i = 0; i < count; ++ i)
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{
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alpha[dst++] = v;
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}
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}
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else
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{
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alpha[dst++] = m_input[src++];
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}
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}
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return alpha;
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}
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int ReadCount () // sub_444F60
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{
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int result = 1;
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int bit_count = 0;
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while (!NextBit())
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++bit_count;
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while (bit_count != 0)
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{
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--bit_count;
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result <<= 1;
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if (NextBit())
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result |= 1;
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}
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return result;
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}
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int m_dst;
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private void AltUnpack (int offset) // sub_445620
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{
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byte[] chunk = new byte[0x10001];
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int src = offset + LittleEndian.ToInt32 (m_input, 0x10); // within m_input
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ResetBitInput (offset);
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int total = 3 * m_width * m_height;
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m_output = new byte[total];
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m_dst = 0;
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int dst = 0;
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while (dst < total)
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{
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int chunk_size = Math.Min (total - dst, 0xffff);
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if (NextBit())
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{
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src = ReadCompressedChunk (src, chunk, chunk_size + 2);
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DecodeChunk (chunk, chunk_size);
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}
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else
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{
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src = ReadRawChunk (src, chunk_size);
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}
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dst += chunk_size;
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}
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return;
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}
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ushort[] v15 = new ushort[0x100];
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ushort[] v16 = new ushort[0x100];
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ushort[] v17 = new ushort[0x10000];
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void DecodeChunk (byte[] chunk, int chunk_size) // sub_444E40
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{
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for (int i = 0; i < v15.Length; ++i)
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v15[i] = 0;
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for (int i = 0; i < chunk_size; ++i)
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++v15[chunk[2+i]];
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ushort v7 = 0;
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for (int r = 0; r < 0x100; ++r)
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{
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v16[r] = v7;
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v7 += v15[r];
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v15[r] = 0;
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}
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for (int v9 = 0; v9 < chunk_size; ++v9)
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{
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int v10 = chunk[2+v9];
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int r = v15[v10] + v16[v10];
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v17[r] = (ushort)v9;
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v15[v10]++;
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}
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int a3 = LittleEndian.ToUInt16 (chunk, 0);
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int v12 = v17[a3];
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for (int i = 0; i < chunk_size; ++i)
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{
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m_output[m_dst++] = chunk[2+v12];
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v12 = v17[v12];
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}
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}
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int ReadCompressedChunk (int src, byte[] chunk, int chunk_size) // sub_4450E0
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{
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byte[] v33 = new byte[0x10];
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byte[] v35 = new byte[0x10];
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for (byte v6 = 0; v6 < 0x10; ++v6)
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{
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v33[v6] = v6;
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v35[v6] = v6;
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}
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int v31 = 0;
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sbyte v5 = -1;
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while ( v31 < chunk_size )
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{
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int v16;
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int v26;
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if (!NextBit())
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{
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if (NextBit())
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{
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v26 = ReadCount();
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v16 = v35[v26];
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chunk[v31++] = (byte)v16;
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}
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else
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{
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if (NextBit())
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{
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int v27 = ReadCount();
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if (NextBit())
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v16 = (v5 - v27) & 0xff;
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else
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v16 = (v5 + v27) & 0xff;
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}
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else
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{
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v16 = m_input[src++];
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}
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chunk[v31++] = (byte)v16;
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v26 = 0;
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while (v35[v26] != v16)
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{
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++v26;
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if (v26 >= 0x10)
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{
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v26 = 0xff;
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break;
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}
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}
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}
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}
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else
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{
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int v17;
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int count = ReadCount();
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if (NextBit())
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{
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v17 = 0;
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v16 = v33[0];
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}
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else if (NextBit())
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{
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v17 = ReadCount();
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v16 = v33[v17];
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}
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else
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{
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if (NextBit())
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{
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int v20 = ReadCount();
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if (NextBit())
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v16 = (v5 - v20) & 0xff;
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else
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v16 = (v5 + v20) & 0xff;
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}
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else
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{
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v16 = m_input[src++];
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}
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v17 = 0;
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while (v33[v17] != v16)
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{
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++v17;
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if (v17 >= 0x10)
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{
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v17 = 0xff;
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break;
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}
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}
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}
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if (v17 != 0)
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{
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for (int i = v17 & 0xF; i != 0; --i)
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v33[i] = v33[i-1];
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v33[0] = (byte)v16;
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}
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for (int n = 0; n < count; ++n)
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chunk[v31++] = (byte)v16;
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v26 = 0;
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while (v35[v26] != v16)
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{
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++v26;
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if (v26 >= 0x10)
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{
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v26 = 0xff;
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break;
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}
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}
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}
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if (0 != (byte)v26)
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{
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for (int k = v26 & 0xF; k != 0; --k)
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v35[k] = v35[k-1];
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v35[0] = (byte)v16;
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}
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v5 = (sbyte)v16;
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}
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return src;
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}
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int ReadRawChunk (int src, int chunk_size) // sub_445400
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{
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int n = 0;
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while (n < chunk_size)
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{
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if (!NextBit())
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{
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m_output[m_dst++] = m_input[src++];
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m_output[m_dst++] = m_input[src++];
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m_output[m_dst++] = m_input[src++];
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n += 3;
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}
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else
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{
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int count = ReadCount();
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byte b = m_input[src++];
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byte g = m_input[src++];
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byte r = m_input[src++];
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for (int i = 0; i < count; ++i)
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{
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m_output[m_dst++] = b;
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m_output[m_dst++] = g;
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m_output[m_dst++] = r;
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}
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n += 3 * count;
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}
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}
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return src;
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}
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}
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}
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}
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