mirror of
https://github.com/crskycode/GARbro.git
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246 lines
9.2 KiB
C#
246 lines
9.2 KiB
C#
//! \file ImageCPB.cs
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//! \date Wed Apr 22 11:08:13 2015
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//! \brief AZ system 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;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.AZSys
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{
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internal class CpbMetaData : ImageMetaData
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{
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public int Type;
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public int Version;
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public uint[] Channel = new uint[4];
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public uint DataOffset;
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}
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[Export(typeof(ImageFormat))]
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public class CpbFormat : ImageFormat
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{
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public override string Tag { get { return "CPB"; } }
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public override string Description { get { return "AZ system image format"; } }
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public override uint Signature { get { return 0x1a425043; } } // 'CPB\x1a'
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("CpbFormat.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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stream.Seek (4, SeekOrigin.Current);
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int type = stream.ReadByte();
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int bpp = stream.ReadByte();
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if (24 != bpp && 32 != bpp)
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throw new NotSupportedException ("Not supported CPB image format");
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using (var input = new ArcView.Reader (stream))
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{
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int version = input.ReadInt16 ();
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if (1 != version && 0 != version)
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throw new NotSupportedException ("Not supported CPB image version");
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var info = new CpbMetaData {
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Type = type,
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Version = version,
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BPP = bpp,
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};
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if (1 == version)
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{
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input.ReadUInt32();
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info.Width = input.ReadUInt16();
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info.Height = input.ReadUInt16();
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info.Channel[0] = input.ReadUInt32();
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info.Channel[1] = input.ReadUInt32();
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info.Channel[2] = input.ReadUInt32();
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info.Channel[3] = input.ReadUInt32();
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}
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else
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{
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info.Width = input.ReadUInt16();
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info.Height = input.ReadUInt16();
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input.ReadUInt32();
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info.Channel[0] = input.ReadUInt32();
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info.Channel[1] = input.ReadUInt32();
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info.Channel[2] = input.ReadUInt32();
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info.Channel[3] = input.ReadUInt32();
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}
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info.DataOffset = (uint)stream.Position;
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return info;
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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 reader = new Reader (stream, (CpbMetaData)info);
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reader.Unpack();
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return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
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}
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internal class Reader
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{
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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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Stream m_input;
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byte[] m_output;
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uint[] m_channel;
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CpbMetaData m_info;
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public PixelFormat Format { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public byte[] Data { get { return m_output; } }
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public Reader (Stream input, CpbMetaData info)
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{
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_info = info;
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m_bpp = info.BPP;
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m_channel = info.Channel;
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m_output = new byte[m_width * m_height * 4];
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if (8 == m_bpp)
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Format = PixelFormats.Indexed8;
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else if (24 == m_bpp)
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Format = PixelFormats.Bgr32;
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else
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Format = PixelFormats.Bgra32;
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m_input = input;
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m_input.Position = info.DataOffset;
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if (1 == m_info.Version)
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{
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StreamMap = new byte[] { 0, 3, 1, 2 };
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ChannelMap = new byte[] { 3, 0, 1, 2 };
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}
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else
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{
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StreamMap = new byte[] { 0, 1, 2, 3 };
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ChannelMap = new byte[] { 2, 1, 0, 3 };
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}
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}
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byte[] StreamMap;
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byte[] ChannelMap;
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public void Unpack ()
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{
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if (0 == m_info.Version && 3 == m_info.Type)
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UnpackV3();
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else
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UnpackV0();
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}
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void UnpackV0 ()
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{
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byte[] channel = new byte[m_width*m_height];
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long start_pos = m_input.Position;
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for (int i = 0; i < 4; ++i)
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{
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if (0 == m_channel[StreamMap[i]])
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continue;
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m_input.Position = start_pos + 4; // skip crc32
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using (var input = new ZLibStream (m_input, CompressionMode.Decompress, true))
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{
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int channel_size = input.Read (channel, 0, channel.Length);
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int dst = ChannelMap[i];
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for (int j = 0; j < channel_size; ++j)
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{
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m_output[dst] = channel[j];
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dst += 4;
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}
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}
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start_pos += m_channel[StreamMap[i]];
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}
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}
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void UnpackV3 ()
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{
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byte[] channel = new byte[m_width*m_height];
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long start_pos = m_input.Position;
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for (int i = 0; i < 4; ++i)
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{
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int packed_size = (int)m_channel[StreamMap[i]];
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if (0 == packed_size)
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continue;
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m_input.Position = start_pos;
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int channel_size = Decompress (packed_size, channel);
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int dst = ChannelMap[i];
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for (int j = 0; j < channel_size; ++j)
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{
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m_output[dst] = channel[j];
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dst += 4;
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}
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start_pos += packed_size;
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}
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}
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int Decompress (int input_size, byte[] output)
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{
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var input = new byte[input_size];
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if (input_size != m_input.Read (input, 0, input_size))
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throw new EndOfStreamException();
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int src1 = 0x14;
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int src2 = src1 + LittleEndian.ToInt32 (input, 4);
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int src3 = src2 + LittleEndian.ToInt32 (input, 8);
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int remaining = LittleEndian.ToInt32 (input, 0x10);
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int dst = 0;
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int mask = 0x80;
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while (remaining > 0)
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{
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int count;
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if (0 != (mask & input[src1]))
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{
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int offset = LittleEndian.ToUInt16 (input, src2);
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src2 += 2;
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count = (offset >> 13) + 3;
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offset = (offset & 0x1FFF) + 1;
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Binary.CopyOverlapped (output, dst-offset, dst, count);
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}
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else
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{
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count = input[src3++] + 1;
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Buffer.BlockCopy (input, src3, output, dst, count);
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src3 += count;
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}
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dst += count;
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remaining -= count;
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mask >>= 1;
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if (0 == mask)
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{
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++src1;
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mask = 0x80;
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}
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}
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return dst;
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}
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}
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}
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}
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