diff --git a/ArcFormats/Scoop/ImageSCP.cs b/ArcFormats/Scoop/ImageSCP.cs new file mode 100644 index 00000000..57ec3fa6 --- /dev/null +++ b/ArcFormats/Scoop/ImageSCP.cs @@ -0,0 +1,122 @@ +//! \file ImageSCP.cs +//! \date 2018 Dec 27 +//! \brief Scoop compressed bitmap. +// +// Copyright (C) 2018 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 GameRes.Utility; + +namespace GameRes.Formats.Scoop +{ + [Export(typeof(ImageFormat))] + public class ScpFormat : ImageFormat + { + public override string Tag { get { return "SCP"; } } + public override string Description { get { return "Scoop compressed bitmap"; } } + public override uint Signature { get { return 0x7A504353; } } // 'SCPz' + + public ScpFormat () + { + Extensions = new string[] { }; + } + + const uint DefaultHeaderKey = 0x65641538; + + public override ImageMetaData ReadMetaData (IBinaryStream file) + { + file.Position = 4; + uint length = file.ReadUInt32() ^ DefaultHeaderKey; + if (length <= 0) + return null; + var header = new byte[0x36]; + Unpack (file, header); + if (!header.AsciiEqual ("BM")) + return null; + using (var bmp = new BinMemoryStream (header)) + { + var info = Bmp.ReadMetaData (bmp) as BmpMetaData; + if (info != null) + info.ImageLength = length; + return info; + } + } + + public override ImageData Read (IBinaryStream file, ImageMetaData info) + { + var meta = (BmpMetaData)info; + var data = new byte[meta.ImageLength]; + file.Position = 8; + Unpack (file, data); + using (var bmp = new BinMemoryStream (data)) + return Bmp.Read (bmp, info); + } + + public override void Write (Stream file, ImageData image) + { + throw new System.NotImplementedException ("ScpFormat.Write not implemented"); + } + + internal void Unpack (IBinaryStream input, byte[] output) + { + uint bits = 0; + int dst = 0; + byte v = 0x7F; + byte x = 0; + while (dst < output.Length) + { + uint ctl = bits >> 31; + bits <<= 1; + if (0 == bits) + { + bits = input.ReadUInt32(); + continue; + } + if (0 == ctl) + { + x = v; + v ^= input.ReadUInt8(); + output[dst++] = v; + } + else + { + ushort z = input.ReadUInt16(); + z += (ushort)bits; + int count = (z >> 12) & 0xF; + if (0 == count) + { + count = (x + input.ReadUInt8()) & 0xFF; + if (0 == count) + break; + count += 15; + } + int offset = ~(z & 0xFFF); + count = Math.Min (count + 2, output.Length - dst); + Binary.CopyOverlapped (output, dst + offset, dst, count); + dst += count; + } + } + } + } +}