GARbro-mirror/ArcFormats/ImageTGF.cs

186 lines
6.8 KiB
C#

//! \file ImageTGF.cs
//! \date Sun Feb 15 21:46:24 2015
//! \brief Tactics TGF image format implementation.
//
// Copyright (C) 2015 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Tactics
{
internal class TgfMetaData : ImageMetaData
{
public uint BitmapSize;
public int ChunkSize;
}
[Export(typeof(ImageFormat))]
public class TgfFormat : ImageFormat
{
public override string Tag { get { return "TGF"; } }
public override string Description { get { return "Tactics graphics file"; } }
public override uint Signature { get { return 0; } }
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("TgfFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[8];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
uint length = LittleEndian.ToUInt32 (header, 0);
int chunk_size = LittleEndian.ToInt32 (header, 4);
if (length > 0xffffff || chunk_size <= 0 || length < chunk_size)
return null;
using (var reader = new Reader (stream, (uint)Math.Max (0x20, chunk_size+2), chunk_size))
{
reader.Unpack();
var bmp = reader.Data;
if (bmp[0] != 'B' || bmp[1] != 'M')
return null;
return new TgfMetaData
{
Width = LittleEndian.ToUInt32 (bmp, 0x12),
Height = LittleEndian.ToUInt32 (bmp, 0x16),
BPP = LittleEndian.ToInt16 (bmp, 0x1c),
BitmapSize = length,
ChunkSize = chunk_size,
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as TgfMetaData;
if (null == meta)
throw new ArgumentException ("TgfFormat.Read should be supplied with TgfMetaData", "info");
stream.Position = 8;
using (var reader = new Reader (stream, meta.BitmapSize, meta.ChunkSize))
{
reader.Unpack();
using (var bmp = new MemoryStream (reader.Data))
{
var decoder = new BmpBitmapDecoder (bmp,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
BitmapSource frame = decoder.Frames[0];
frame.Freeze();
return new ImageData (frame, info);
}
}
}
internal class Reader : IDisposable
{
BinaryReader m_input;
byte[] m_output;
int m_chunk_size;
public byte[] Data { get { return m_output; } }
public Reader (Stream file, uint bmp_size, int chunk_size)
{
m_chunk_size = chunk_size;
m_output = new byte[bmp_size];
m_input = new BinaryReader (file, Encoding.ASCII, true);
}
public void Unpack ()
{
int dst = 0;
while (dst < m_output.Length)
{
int code = m_input.ReadByte();
switch (code)
{
case 0:
{
int count = m_input.ReadByte();
if (dst + count > m_output.Length)
count = m_output.Length - dst;
m_input.Read (m_output, dst, count);
dst += count;
break;
}
case 1:
{
int count = m_input.ReadByte() * m_chunk_size;
if (dst + count > m_output.Length)
count = m_output.Length - dst;
m_input.Read (m_output, dst, count);
dst += count;
break;
}
default:
{
if (dst + m_chunk_size > m_output.Length)
return;
m_input.Read (m_output, dst, m_chunk_size);
int src = dst;
dst += m_chunk_size;
for (int i = 1; i < code; ++i)
{
if (dst + m_chunk_size > m_output.Length)
return;
System.Buffer.BlockCopy (m_output, src, m_output, dst, m_chunk_size);
dst += m_chunk_size;
}
break;
}
}
}
}
#region IDisposable Members
bool disposed = false;
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
protected virtual void Dispose (bool disposing)
{
if (!disposed)
{
if (disposing)
m_input.Dispose();
disposed = true;
}
}
#endregion
}
}
}