GARbro-mirror/ArcFormats/Silky/ImageZIT.cs

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2016-04-05 03:18:41 +08:00
//! \file ImageZIT.cs
//! \date Mon Apr 04 18:59:57 2016
//! \brief Silky's image format.
//
// Copyright (C) 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.Media;
using GameRes.Utility;
namespace GameRes.Formats.Silky
{
internal class ZitMetaData : ImageMetaData
{
public ushort Type;
public int Colors;
}
[Export(typeof(ImageFormat))]
public class ZitFormat : ImageFormat
{
public override string Tag { get { return "ZIT"; } }
public override string Description { get { return "Silky's image format"; } }
public override uint Signature { get { return 0x1803545A; } } // 'ZT'
public ZitFormat ()
{
Signatures = new uint[] { 0x1803545A, 0x2084545A, 0x8803545A };
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x10];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
return new ZitMetaData
{
Type = LittleEndian.ToUInt16 (header, 2),
Width = LittleEndian.ToUInt16 (header, 8),
Height = LittleEndian.ToUInt16 (header, 10),
BPP = 32,
Colors = LittleEndian.ToUInt16 (header, 4),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
using (var reader = new ZitReader (stream, (ZitMetaData)info))
{
reader.Unpack();
return ImageData.Create (info, PixelFormats.Bgra32, null, reader.Data);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("ZitFormat.Write not implemented");
}
}
internal class ZitReader : IDisposable
{
BinaryReader m_input;
byte[] m_output;
int m_width;
int m_height;
ushort m_type;
int m_colors;
public byte[] Data { get { return m_output; } }
public ZitReader (Stream input, ZitMetaData info)
{
m_input = new ArcView.Reader (input);
m_width = (int)info.Width;
m_height = (int)info.Height;
m_type = info.Type;
m_colors = info.Colors;
m_output = new byte[m_width*m_height*4];
}
public void Unpack ()
{
m_input.BaseStream.Position = 0x10;
switch (m_type)
{
case 0x1803: Unpack1(); break;
case 0x2084: Unpack2(); break;
case 0x8803: Unpack3(); break;
default:
throw new InvalidFormatException();
}
}
void Unpack1 ()
{
int dst = 0;
while (dst < m_output.Length)
{
byte b = m_input.ReadByte();
byte g = m_input.ReadByte();
byte r = m_input.ReadByte();
if (b != 0 || g != 0xFF || r != 0)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
m_output[dst++] = 0xFF;
}
else
{
LittleEndian.Pack (0xFFFFu, m_output, dst);
dst += 4;
}
}
}
void Unpack2 ()
{
m_input.Read (m_output, 0, m_output.Length);
}
void Unpack3 ()
{
var palette = m_input.ReadBytes (m_colors * 3);
int dst = 0;
while (dst < m_output.Length)
{
int index = m_input.ReadByte() * 3;
byte b = palette[index];
byte g = palette[index+1];
byte r = palette[index+2];
if (b != 0 || g != 0xFF || r != 0)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
m_output[dst++] = 0xFF;
}
else
{
LittleEndian.Pack (0xFF00u, m_output, dst);
dst += 4;
}
}
}
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
}
#endregion
}
}