GARbro-mirror/ArcFormats/Ivory/ImageMOE.cs

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//! \file ImageMOE.cs
//! \date Thu Sep 08 17:56:51 2016
//! \brief Ivory 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.Ivory
{
[Export(typeof(ImageFormat))]
public class MoeFormat : ImageFormat
{
public override string Tag { get { return "MOE"; } }
public override string Description { get { return "Ivory image format"; } }
public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var wh = stream.Signature;
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uint width = wh & 0xFFFF;
uint height = wh >> 16;
if (0 == width || width > 800 || 0 == height || height > 600)
return null;
stream.Position = 4;
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if (!IsValidInput (stream.AsStream, width, height))
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return null;
return new ImageMetaData { Width = width, Height = height, BPP = 24 };
}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
stream.Position = 4;
var pixels = new byte[3 * info.Width * info.Height];
int dst = 0;
while (dst < pixels.Length)
{
int count = stream.ReadByte();
if (-1 == count)
throw new EndOfStreamException();
if (0 != (count & 0x80))
{
count = 3 * (count & 0x7F);
stream.Read (pixels, dst, count);
dst += count;
}
else
{
count *= 3;
stream.Read (pixels, dst, 3);
Binary.CopyOverlapped (pixels, dst, dst+3, count-3);
dst += count;
}
}
return ImageData.Create (info, PixelFormats.Bgr24, null, pixels);
}
/// <summary>
/// Try to interpret input stream as a compressed image.
/// </summary>
bool IsValidInput (Stream input, uint width, uint height)
{
int total = (int)width * (int)height;
int dst = 0;
while (dst < total)
{
int count = input.ReadByte();
if (-1 == count)
return false;
if (0 != (count & 0x80))
{
count &= 0x7F;
input.Seek (count * 3, SeekOrigin.Current);
}
else
{
input.Seek (3, SeekOrigin.Current);
}
dst += count;
if (dst > total)
return false;
}
return true;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("MoeFormat.Write not implemented");
}
}
}