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100 lines
4.0 KiB
C#
100 lines
4.0 KiB
C#
//! \file ImageGR.cs
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//! \date Fri May 15 04:26:58 2015
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//! \brief EAGLS system compressed bitmap.
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//
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// Copyright (C) 2015-2016 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.Windows.Media;
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using System.IO;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Eagls
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{
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internal class GrMetaData : ImageMetaData
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{
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public int UnpackedSize;
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}
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[Export(typeof(ImageFormat))]
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public class GrFormat : ImageFormat
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{
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public override string Tag { get { return "GR"; } }
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public override string Description { get { return "EAGLS engine compressed bitmap"; } }
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public override uint Signature { get { return 0; } }
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public override bool CanWrite { get { return false; } }
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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using (var lzs = new LzssStream (file.AsStream, LzssMode.Decompress, true))
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{
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if (lzs.ReadByte() != 'B' || lzs.ReadByte() != 'M')
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return null;
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var bmp = new byte[0x26];
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if (0x24 != lzs.Read (bmp, 2, 0x24))
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return null;
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int file_size = LittleEndian.ToInt32 (bmp, 2);
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int width = LittleEndian.ToInt32 (bmp, 0x12);
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int height = LittleEndian.ToInt32 (bmp, 0x16);
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int bpp = LittleEndian.ToInt16 (bmp, 0x1C);
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int image_size = LittleEndian.ToInt32 (bmp, 0x22);
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if (0 == image_size)
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image_size = width * height * (bpp / 8);
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return new GrMetaData
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{
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Width = (uint)width,
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Height = (uint)height,
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BPP = bpp,
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UnpackedSize = 24 == bpp ? file_size : (image_size+0x36),
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};
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}
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var meta = (GrMetaData)info;
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using (var lzs = new LzssStream (file.AsStream, LzssMode.Decompress, true))
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using (var bmp = new BinaryStream (lzs, file.Name))
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{
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if (32 != info.BPP)
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return Bmp.Read (bmp, info);
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int stride = (int)info.Width*4;
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var pixels = new byte[Math.Max (0x36, stride*info.Height)];
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bmp.Read (pixels, 0, 0x36); // skip header
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for (int y = (int)info.Height - 1; y >= 0; --y)
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{
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int dst = y * stride;
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bmp.Read (pixels, dst, stride);
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}
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return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
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}
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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 ("GrFormat.Write not implemented");
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}
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}
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}
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