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51 lines
2.1 KiB
C#
51 lines
2.1 KiB
C#
//! \file BmpExtension.cs
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//! \date 2018 Jan 14
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//! \brief BMP files with obfuscated color depth.
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//
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// Copyright (C) 2018 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.ComponentModel.Composition;
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using System.Windows.Media;
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namespace GameRes.Formats.Hyperspace
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{
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/// <summary>
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/// Color depth of 24bpp images simply changed to 16bpp. This extensions reverts it back.
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/// </summary>
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[Export(typeof(IBmpExtension))]
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public class BmpDepthFixer : IBmpExtension
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{
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public ImageData Read (IBinaryStream file, BmpMetaData info)
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{
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if (info.BPP != 0x10 || !file.CanSeek)
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return null;
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int stride = ((int)info.Width * 3 + 3) & ~3;
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int total_24bpp = stride * (int)info.Height;
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if (total_24bpp + info.ImageOffset != file.Length)
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return null;
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file.Position = info.ImageOffset;
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var pixels = file.ReadBytes ((int)total_24bpp);
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return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, stride);
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}
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}
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}
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