GARbro-mirror/ArcFormats/Yuka/ImageYKG.cs

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//! \file ImageYKG.cs
//! \date Thu Aug 13 22:16:30 2015
//! \brief Yuka engine images 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.ComponentModel.Composition;
using System.IO;
using System.Linq;
using GameRes.Utility;
namespace GameRes.Formats.Yuka
{
internal class YkgMetaData : ImageMetaData
{
public uint DataOffset;
public uint DataSize;
public YkgImage Format;
}
internal enum YkgImage
{
Bmp, Png, Gnp,
}
[Export(typeof(ImageFormat))]
public class YkgFormat : ImageFormat
{
public override string Tag { get { return "YKG"; } }
public override string Description { get { return "Yuka engine image format"; } }
public override uint Signature { get { return 0x30474B59; } } // 'YKG0'
static readonly byte[] PngPrefix = new byte[4] { 0x89, 'P'^0, 'N'^0, 'G'^0 };
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public override ImageMetaData ReadMetaData (IBinaryStream file)
{
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var header = file.ReadHeader (0x40);
if (!header.AsciiEqual (4, "00\0\0"))
return null;
var ykg = new YkgMetaData {
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DataOffset = header.ToUInt32 (0x28),
DataSize = header.ToUInt32 (0x2C)
};
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if (0 == ykg.DataOffset)
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ykg.DataOffset = header.ToUInt32 (8);
if (ykg.DataOffset < 0x30)
return null;
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if (0 == ykg.DataSize)
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ykg.DataSize = (uint)(file.Length - ykg.DataOffset);
ImageMetaData info = null;
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using (var reg = new StreamRegion (file.AsStream, ykg.DataOffset, ykg.DataSize, true))
using (var img = new BinaryStream (reg, file.Name))
{
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var img_header = img.ReadHeader (4);
if (header.AsciiEqual ("BM"))
{
img.Position = 0;
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info = Bmp.ReadMetaData (img);
ykg.Format = YkgImage.Bmp;
}
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else if (header.AsciiEqual ("\x89PNG"))
{
img.Position = 0;
info = Png.ReadMetaData (img);
ykg.Format = YkgImage.Png;
}
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else if (header.AsciiEqual ("\x89GNP"))
{
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using (var body = new StreamRegion (file.AsStream, ykg.DataOffset+4, ykg.DataSize-4, true))
using (var pre = new PrefixStream (PngPrefix, body))
using (var png = new BinaryStream (pre, file.Name))
info = Png.ReadMetaData (png);
ykg.Format = YkgImage.Gnp;
}
}
if (null == info)
return null;
ykg.Width = info.Width;
ykg.Height = info.Height;
ykg.BPP = info.BPP;
ykg.OffsetX = info.OffsetX;
ykg.OffsetY = info.OffsetY;
return ykg;
}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
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var meta = (YkgMetaData)info;
switch (meta.Format)
{
case YkgImage.Bmp:
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using (var reg = new StreamRegion (stream.AsStream, meta.DataOffset, meta.DataSize, true))
using (var bmp = new BinaryStream (reg, stream.Name))
return Bmp.Read (bmp, info);
case YkgImage.Png:
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using (var reg = new StreamRegion (stream.AsStream, meta.DataOffset, meta.DataSize, true))
using (var png = new BinaryStream (reg, stream.Name))
return Png.Read (png, info);
case YkgImage.Gnp:
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using (var body = new StreamRegion (stream.AsStream, meta.DataOffset+4, meta.DataSize-4, true))
using (var pre = new PrefixStream (PngPrefix, body))
using (var png = new BinaryStream (pre, stream.Name))
return Png.Read (png, info);
default:
throw new InvalidFormatException();
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("YkgFormat.Write not implemented");
}
}
}