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//! \file ImageBET.cs
//! \date 2017 Dec 09
//! \brief System21 compressed image.
//
// Copyright (C) 2017 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 System.Windows.Media.Imaging;
using GameRes.Compression;
namespace GameRes.Formats.System21
{
[Export(typeof(ImageFormat))]
public class BetFormat : ImageFormat
{
public override string Tag { get { return "BET"; } }
public override string Description { get { return "System21 compressed image format"; } }
public override uint Signature { get { return 0x44445A53; } } // 'SZDD'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
if (!file.Name.HasExtension (".bet"))
return null;
using (var lz = OpenLzStream (file.AsStream))
using (var input = new BinaryStream (lz, file.Name))
{
uint w = input.ReadUInt32();
uint h = input.ReadUInt32();
int bpp = input.ReadUInt16();
if ((bpp != 24 && bpp != 8) || 0 == w || w > 0x8000 || 0 == h || h > 0x8000)
return null;
return new ImageMetaData { Width = w, Height = h, BPP = bpp };
}
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
using (var input = OpenLzStream (file.AsStream))
{
int stride = (int)info.Width * info.BPP / 8;
var pixels = new byte[stride * (int)info.Height];
for (int i = 0; i < 10; ++i)
input.ReadByte();
BitmapPalette palette = null;
if (8 == info.BPP)
palette = ReadPalette (input);
if (input.Read (pixels, 0, pixels.Length) != pixels.Length)
throw new InvalidFormatException();
for (int i = 0; i < pixels.Length; ++i)
pixels[i] ^= 0xFF;
PixelFormat format = 8 == info.BPP ? PixelFormats.Indexed8 : PixelFormats.Bgr24;
return ImageData.CreateFlipped (info, format, palette, pixels, stride);
}
}
Stream OpenLzStream (Stream input)
{
input.Position = 0xE;
var lz = new LzssStream (input, LzssMode.Decompress, true);
lz.Config.FrameSize = 0x1000;
lz.Config.FrameFill = 0x20;
lz.Config.FrameInitPos = 0x1000 - 0x10;
return lz;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("BetFormat.Write not implemented");
}
}
}