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112 lines
4.1 KiB
C#
112 lines
4.1 KiB
C#
//! \file ImageIGF.cs
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//! \date Sun Jun 28 00:13:01 2015
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//! \brief Silky's compressed image format.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Silky
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{
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internal class IgfMetaData : ImageMetaData
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{
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public int UnpackedSize;
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public bool IsPacked;
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}
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[Export(typeof(ImageFormat))]
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public class IgfFormat : ImageFormat
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{
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public override string Tag { get { return "IGF"; } }
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public override string Description { get { return "Silky's image format"; } }
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public override uint Signature { get { return 0x5355455Au; } } // 'ZEUS'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[0x14];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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uint width = LittleEndian.ToUInt32 (header, 4);
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uint height = LittleEndian.ToUInt32 (header, 8);
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int unpacked_size = LittleEndian.ToInt32 (header, 0xC);
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int flags = LittleEndian.ToInt32 (header, 0x10);
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int bpp = flags & 0xff;
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if (0 == bpp)
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bpp = 32;
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return new IgfMetaData
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{
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Width = width,
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Height = height,
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BPP = bpp,
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UnpackedSize = unpacked_size,
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IsPacked = 0 != (flags & 0x80000000),
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};
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as IgfMetaData;
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if (null == meta)
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throw new ArgumentException ("IgfFormat.Read should be supplied with IgfMetaData", "info");
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int stride = (int)info.Width*info.BPP/8;
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stream.Position = 0x14;
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byte[] pixels;
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if (meta.IsPacked)
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{
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int in_size = (int)(stream.Length - 0x14);
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using (var lzss = new LzssReader (stream, in_size, meta.UnpackedSize))
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{
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lzss.FrameFill = 0x20;
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lzss.Unpack();
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pixels = lzss.Data;
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}
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}
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else
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{
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pixels = new byte[info.Height*stride];
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if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
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throw new InvalidFormatException ("Unexpected end of file");
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}
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PixelFormat format;
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if (24 == info.BPP)
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format = PixelFormats.Bgr24;
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else if (32 == info.BPP)
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format = PixelFormats.Bgra32;
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else
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format = PixelFormats.Gray8;
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return ImageData.CreateFlipped (info, format, null, pixels, stride);
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new NotImplementedException ("IgfFormat.Write not implemented");
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}
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}
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}
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