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//! \file ImageS25.cs
//! \date Sat Apr 18 17:00:54 2015
//! \brief ShiinaRio S25 multi-image format.
//
// 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.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.ShiinaRio
{
internal class S25MetaData : ImageMetaData
{
public uint FirstOffset;
}
[Export(typeof(ImageFormat))]
public class S25Format : ImageFormat
{
public override string Tag { get { return "S25"; } }
public override string Description { get { return "ShiinaRio image format"; } }
public override uint Signature { get { return 0x00353253; } } // 'S25'
/* FIXME: in current implementation, only the first frame is returned */
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
input.ReadUInt32();
int count = input.ReadInt32();
if (count < 0 || count > 0xfffff)
return null;
uint first_offset = input.ReadUInt32();
if (0 == first_offset)
return null;
input.BaseStream.Position = first_offset;
var info = new S25MetaData();
info.Width = input.ReadUInt32();
info.Height = input.ReadUInt32();
info.OffsetX = input.ReadInt32();
info.OffsetY = input.ReadInt32();
info.FirstOffset = first_offset+0x14;
info.BPP = 32;
return info;
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as S25MetaData;
if (null == meta)
throw new ArgumentException ("S25Format.Read should be supplied with S25MetaData", "info");
using (var reader = new Reader (stream, meta))
{
var pixels = reader.Unpack();
var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, 96, 96,
PixelFormats.Bgra32, null, pixels, (int)info.Width*4);
bitmap.Freeze();
return new ImageData (bitmap, info);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("S25Format.Write not implemented");
}
internal class Reader : IDisposable
{
ArcView.Reader m_input;
int m_width;
int m_height;
uint m_origin;
uint[] m_rows;
byte[] m_output;
public byte[] Data { get { return m_output; } }
public Reader (Stream file, S25MetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_rows = new uint[m_height];
m_output = new byte[m_width * m_height * 4];
m_input = new ArcView.Reader (file);
m_origin = info.FirstOffset;
}
public byte[] Unpack ()
{
m_input.BaseStream.Position = m_origin;
for (int i = 0; i < m_rows.Length; ++i)
m_rows[i] = m_input.ReadUInt32();
int dst = 0;
int stride = m_width * 4;
for (int y = 0; y < m_height && dst != m_output.Length; ++y)
{
byte b, g, r, a;
uint row_pos = m_rows[y];
m_input.BaseStream.Position = row_pos;
m_input.ReadUInt16();
for (int x = m_width; x > 0 && dst != m_output.Length; )
{
if (0 != (row_pos & 1))
{
m_input.ReadByte();
++row_pos;
}
int count = m_input.ReadUInt16();
row_pos += 2;
int method = count >> 13;
int skip = (count & 0x1800) >> 11;
if (0 != skip)
{
m_input.BaseStream.Seek (skip, SeekOrigin.Current);
row_pos += (uint)skip;
}
count &= 0x7ff;
if (count > x) count = x;
x -= count;
if (0 == method || 1 == method)
{
dst += count * 4;
}
else if (2 == method)
{
for (int i = 0; i < count; ++i)
{
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = 0xff;
row_pos += 3;
}
}
else if (3 == method)
{
b = m_input.ReadByte();
g = m_input.ReadByte();
r = m_input.ReadByte();
row_pos += 3;
for (int i = 0; i < count; ++i)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
m_output[dst++] = 0xff;
}
}
else if (4 == method)
{
for (int i = 0; i < count; ++i)
{
a = m_input.ReadByte();
m_output[dst] += (byte)((m_input.ReadByte() - m_output[dst]) * a / 256);
++dst;
m_output[dst] += (byte)((m_input.ReadByte() - m_output[dst]) * a / 256);
++dst;
m_output[dst] += (byte)((m_input.ReadByte() - m_output[dst]) * a / 256);
++dst;
m_output[dst++] = a;
row_pos += 4;
}
}
else
{
row_pos += 4;
a = m_input.ReadByte();
b = m_input.ReadByte();
g = m_input.ReadByte();
r = m_input.ReadByte();
for (int i = 0; i < count; ++i)
{
m_output[dst] += (byte)((b - m_output[dst]) * a / 256);
++dst;
m_output[dst] += (byte)((g - m_output[dst]) * a / 256);
++dst;
m_output[dst] += (byte)((r - m_output[dst]) * a / 256);
++dst;
m_output[dst++] = a;
}
}
}
}
return m_output;
}
#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
}
}
}