GARbro-mirror/ArcFormats/Silky/ImageIGF.cs

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2015-06-28 11:43:04 +08:00
//! \file ImageIGF.cs
//! \date Sun Jun 28 00:13:01 2015
//! \brief Silky's compressed 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Compression;
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using GameRes.Utility;
namespace GameRes.Formats.Silky
{
internal class IgfMetaData : ImageMetaData
{
public int UnpackedSize;
public bool IsPacked;
}
[Export(typeof(ImageFormat))]
public class IgfFormat : ImageFormat
{
public override string Tag { get { return "IGF"; } }
public override string Description { get { return "Silky's image format"; } }
public override uint Signature { get { return 0x5355455Au; } } // 'ZEUS'
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x14];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
uint width = LittleEndian.ToUInt32 (header, 4);
uint height = LittleEndian.ToUInt32 (header, 8);
int unpacked_size = LittleEndian.ToInt32 (header, 0xC);
int flags = LittleEndian.ToInt32 (header, 0x10);
int bpp = flags & 0xff;
if (0 == bpp)
bpp = 32;
return new IgfMetaData
{
Width = width,
Height = height,
BPP = bpp,
UnpackedSize = unpacked_size,
IsPacked = 0 != (flags & 0x80000000),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as IgfMetaData;
if (null == meta)
throw new ArgumentException ("IgfFormat.Read should be supplied with IgfMetaData", "info");
int stride = (int)info.Width*info.BPP/8;
stream.Position = 0x14;
byte[] pixels;
if (meta.IsPacked)
{
int in_size = (int)(stream.Length - 0x14);
using (var lzss = new LzssReader (stream, in_size, meta.UnpackedSize))
{
lzss.FrameFill = 0x20;
lzss.Unpack();
pixels = lzss.Data;
}
}
else
{
pixels = new byte[info.Height*stride];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
}
PixelFormat format;
if (24 == info.BPP)
format = PixelFormats.Bgr24;
else if (32 == info.BPP)
format = PixelFormats.Bgra32;
else
format = PixelFormats.Gray8;
var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height,
ImageData.DefaultDpiX, ImageData.DefaultDpiY, format, null, pixels, stride);
var flipped = new TransformedBitmap (bitmap, new ScaleTransform { ScaleY = -1 });
flipped.Freeze();
return new ImageData (flipped, info);
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("IgfFormat.Write not implemented");
}
}
}