258 lines
8.7 KiB
C#

//! \file ImageIPF.cs
//! \date Sat Jan 14 13:26:13 2017
//! \brief TechnoBrain's "Inteligent Picture Format"
//
// Copyright (C) 2017 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.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.TechnoBrain
{
internal class IpfMetaData : ImageMetaData, ICloneable
{
public bool HasPalette;
public bool HasBitmap;
public bool IsCompressed;
public long PalOffset;
public int PalSize;
public long BmpOffset;
public long DataOffset;
public string FormatString;
public object Clone ()
{
return MemberwiseClone();
}
}
[Export(typeof(ImageFormat))]
public class IpfFormat : ImageFormat
{
public override string Tag { get { return "IPF"; } }
public override string Description { get { return "TechnoBrain's 'Inteligent Picture Format'"; } }
public override uint Signature { get { return 0; } } // 'RIFF'
internal IpfMetaData ReadIpfHeader (IBinaryStream file)
{
// 'RIFF' isn't included into signature to avoid auto-detection of the WAV files as IPF images.
if (0x46464952 != file.Signature) // 'RIFF'
return null;
var header = file.ReadHeader (0x14);
if (!header.AsciiEqual (0xC, "fmt "))
return null;
int fmt_size = header.ToInt32 (0x10);
if (fmt_size < 0x24)
return null;
header = file.ReadHeader (0x14 + fmt_size);
var info = new IpfMetaData {
BPP = 8,
HasPalette = header.ToInt32 (0x18) != 0,
HasBitmap = header.ToInt32 (0x28) != 0,
FormatString = header.GetCString (8, 8),
};
if (info.HasPalette)
{
if (0x206C6170 != file.ReadInt32()) // 'pal '
return null;
info.PalSize = file.ReadInt32();
if (info.PalSize < 0x24)
return null;
info.PalOffset = file.Position;
file.Position = info.PalOffset + info.PalSize;
}
info.DataOffset = file.Position;
return info;
}
internal bool ReadBmpInfo (IBinaryStream file, IpfMetaData info)
{
if (0x20706D62 != file.ReadInt32()) // 'bmp '
return false;
int bmp_size = file.ReadInt32();
if (bmp_size <= 0x20)
return false;
info.BmpOffset = file.Position + 0x18;
info.Width = file.ReadUInt16();
info.Height = file.ReadUInt16();
file.ReadUInt32();
info.OffsetX = file.ReadInt16();
info.OffsetY = file.ReadInt16();
file.Seek (6, SeekOrigin.Current);
info.IsCompressed = 0 != (file.ReadByte() & 1);
return true;
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var info = ReadIpfHeader (file);
if (null == info || info.FormatString != "IPF fmt " || !info.HasBitmap)
return null;
file.Position = info.DataOffset;
if (!ReadBmpInfo (file, info))
return null;
return info;
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new IpfReader (file, (IpfMetaData)info, this);
return reader.Image;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("IpfFormat.Write not implemented");
}
}
internal sealed class IpfReader : IImageDecoder
{
IBinaryStream m_input;
IpfMetaData m_info;
byte[] m_output;
ImageData m_image;
public BitmapPalette Palette { get; private set; }
public PixelFormat Format { get; private set; }
public Stream Source { get { return m_input.AsStream; } }
public ImageMetaData Info { get { return m_info; } }
public ImageData Image { get { return m_image ?? (m_image = GetImageData()); } }
public ImageFormat SourceFormat { get; private set; }
public IpfReader (IBinaryStream input, IpfMetaData info, ImageFormat impl)
{
m_input = input;
m_info = info;
m_output = new byte[m_info.Width*m_info.Height];
Format = m_info.HasPalette ? PixelFormats.Indexed8 : PixelFormats.Gray8;
SourceFormat = impl;
}
private ImageData GetImageData ()
{
var pixels = Unpack();
return ImageData.Create (m_info, Format, Palette, pixels);
}
public byte[] Unpack ()
{
if (m_info.HasPalette)
{
UnpackPalette();
}
m_input.Position = m_info.BmpOffset;
if (m_info.IsCompressed)
UnpackBitmap();
else
m_input.Read (m_output, 0, m_output.Length);
return m_output;
}
void UnpackPalette ()
{
m_input.Position = m_info.PalOffset+4;
var header = m_input.ReadBytes (0x20);
var data = m_input.ReadBytes (m_info.PalSize - 0x24);
const int min_index = 0x0A;
const int max_index = 0xF6;
var color_map = new Color[0x100];
int src = 0;
for (int i = 0; i < 0x20; ++i)
{
var bits = header[i];
for (int j = 0; j < 8; ++j)
{
int dst = (i << 3) + j;
if (dst >= min_index && 0 != (bits & 0x80))
{
if (dst >= min_index && dst <= max_index)
{
color_map[dst] = Color.FromRgb (data[src], data[src+1], data[src+2]);
}
src += 3;
}
bits <<= 1;
}
}
Palette = new BitmapPalette (color_map);
}
void UnpackBitmap () // IPF_12
{
int dst = 0;
while (dst < m_output.Length)
{
byte ctl = m_input.ReadUInt8();
if (0xF == ctl)
{
break;
}
else if (0xE == ctl)
{
m_output[dst++] = ctl;
}
else if (ctl < 0x10)
{
int count = (ctl << 8 | m_input.ReadUInt8()) + 1;
byte b = m_input.ReadUInt8();
for (int i = 0; i < count; ++i)
m_output[dst++] = b;
}
else if (ctl < 0x20)
{
int offset = ((ctl - 0x10) << 8 | m_input.ReadUInt8()) + 1;
int count = m_input.ReadUInt8() + 1;
Binary.CopyOverlapped (m_output, dst - offset, dst, count);
dst += count;
}
else
{
m_output[dst++] = (byte)(ctl - 0x10);
}
}
}
#region IDisposable members
bool m_disposed = false;
public void Dispose ()
{
if (!m_disposed)
{
m_input.Dispose();
m_disposed = true;
}
GC.SuppressFinalize (this);
}
#endregion
}
}