GARbro-mirror/ArcFormats/AZSys/ImageCPB.cs

246 lines
9.2 KiB
C#

//! \file ImageCPB.cs
//! \date Wed Apr 22 11:08:13 2015
//! \brief AZ system image format implementation.
//
// Copyright (C) 2015-2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.AZSys
{
internal class CpbMetaData : ImageMetaData
{
public int Type;
public int Version;
public uint[] Channel = new uint[4];
public uint DataOffset;
}
[Export(typeof(ImageFormat))]
public class CpbFormat : ImageFormat
{
public override string Tag { get { return "CPB"; } }
public override string Description { get { return "AZ system image format"; } }
public override uint Signature { get { return 0x1a425043; } } // 'CPB\x1a'
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("CpbFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
stream.Seek (4, SeekOrigin.Current);
int type = stream.ReadByte();
int bpp = stream.ReadByte();
if (24 != bpp && 32 != bpp)
throw new NotSupportedException ("Not supported CPB image format");
using (var input = new ArcView.Reader (stream))
{
int version = input.ReadInt16 ();
if (1 != version && 0 != version)
throw new NotSupportedException ("Not supported CPB image version");
var info = new CpbMetaData {
Type = type,
Version = version,
BPP = bpp,
};
if (1 == version)
{
input.ReadUInt32();
info.Width = input.ReadUInt16();
info.Height = input.ReadUInt16();
info.Channel[0] = input.ReadUInt32();
info.Channel[1] = input.ReadUInt32();
info.Channel[2] = input.ReadUInt32();
info.Channel[3] = input.ReadUInt32();
}
else
{
info.Width = input.ReadUInt16();
info.Height = input.ReadUInt16();
input.ReadUInt32();
info.Channel[0] = input.ReadUInt32();
info.Channel[1] = input.ReadUInt32();
info.Channel[2] = input.ReadUInt32();
info.Channel[3] = input.ReadUInt32();
}
info.DataOffset = (uint)stream.Position;
return info;
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var reader = new Reader (stream, (CpbMetaData)info);
reader.Unpack();
return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
}
internal class Reader
{
int m_width;
int m_height;
int m_bpp;
Stream m_input;
byte[] m_output;
uint[] m_channel;
CpbMetaData m_info;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_output; } }
public Reader (Stream input, CpbMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_info = info;
m_bpp = info.BPP;
m_channel = info.Channel;
m_output = new byte[m_width * m_height * 4];
if (8 == m_bpp)
Format = PixelFormats.Indexed8;
else if (24 == m_bpp)
Format = PixelFormats.Bgr32;
else
Format = PixelFormats.Bgra32;
m_input = input;
m_input.Position = info.DataOffset;
if (1 == m_info.Version)
{
StreamMap = new byte[] { 0, 3, 1, 2 };
ChannelMap = new byte[] { 3, 0, 1, 2 };
}
else
{
StreamMap = new byte[] { 0, 1, 2, 3 };
ChannelMap = new byte[] { 2, 1, 0, 3 };
}
}
byte[] StreamMap;
byte[] ChannelMap;
public void Unpack ()
{
if (0 == m_info.Version && 3 == m_info.Type)
UnpackV3();
else
UnpackV0();
}
void UnpackV0 ()
{
byte[] channel = new byte[m_width*m_height];
long start_pos = m_input.Position;
for (int i = 0; i < 4; ++i)
{
if (0 == m_channel[StreamMap[i]])
continue;
m_input.Position = start_pos + 4; // skip crc32
using (var input = new ZLibStream (m_input, CompressionMode.Decompress, true))
{
int channel_size = input.Read (channel, 0, channel.Length);
int dst = ChannelMap[i];
for (int j = 0; j < channel_size; ++j)
{
m_output[dst] = channel[j];
dst += 4;
}
}
start_pos += m_channel[StreamMap[i]];
}
}
void UnpackV3 ()
{
byte[] channel = new byte[m_width*m_height];
long start_pos = m_input.Position;
for (int i = 0; i < 4; ++i)
{
int packed_size = (int)m_channel[StreamMap[i]];
if (0 == packed_size)
continue;
m_input.Position = start_pos;
int channel_size = Decompress (packed_size, channel);
int dst = ChannelMap[i];
for (int j = 0; j < channel_size; ++j)
{
m_output[dst] = channel[j];
dst += 4;
}
start_pos += packed_size;
}
}
int Decompress (int input_size, byte[] output)
{
var input = new byte[input_size];
if (input_size != m_input.Read (input, 0, input_size))
throw new EndOfStreamException();
int src1 = 0x14;
int src2 = src1 + LittleEndian.ToInt32 (input, 4);
int src3 = src2 + LittleEndian.ToInt32 (input, 8);
int remaining = LittleEndian.ToInt32 (input, 0x10);
int dst = 0;
int mask = 0x80;
while (remaining > 0)
{
int count;
if (0 != (mask & input[src1]))
{
int offset = LittleEndian.ToUInt16 (input, src2);
src2 += 2;
count = (offset >> 13) + 3;
offset = (offset & 0x1FFF) + 1;
Binary.CopyOverlapped (output, dst-offset, dst, count);
}
else
{
count = input[src3++] + 1;
Buffer.BlockCopy (input, src3, output, dst, count);
src3 += count;
}
dst += count;
remaining -= count;
mask >>= 1;
if (0 == mask)
{
++src1;
mask = 0x80;
}
}
return dst;
}
}
}
}