GARbro-mirror/ArcFormats/Cyberworks/ImageTB1.cs

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//! \file ImageTB1.cs
//! \date 2017 Dec 18
//! \brief TinkerBell image format.
//
// 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;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.TinkerBell
{
[Export(typeof(ImageFormat))]
public class Tb1Format : ImageFormat
{
public override string Tag { get { return "TB1"; } }
public override string Description { get { return "TinkerBell image format"; } }
public override uint Signature { get { return 0x4641454C; } } // 'LEAF'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x14);
if (!header.AsciiEqual (4, "64K"))
return null;
int bpp = header.ToUInt16 (0x10);
if (bpp != 24)
return null;
return new ImageMetaData {
Width = header.ToUInt16 (0xC),
Height = header.ToUInt16 (0xE),
BPP = bpp,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
int stride = (int)info.Width * info.BPP / 8;
var pixels = new byte[stride * (int)info.Height];
file.Position = 0x18;
LzssUnpack (file, pixels);
return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, stride);
}
void LzssUnpack (IBinaryStream input, byte[] output)
{
var frame = new byte[0x1000];
int frame_pos = 0xFEE;
int bits = 0, bit_mask = 0;
int dst = 0;
while (dst < output.Length)
{
bit_mask >>= 1;
if (0 == bit_mask)
{
bits = ~input.ReadByte();
bit_mask = 0x80;
}
if (0 != (bits & bit_mask))
{
byte v = (byte)~input.ReadUInt8();
output[dst++] = frame[frame_pos++ & 0xFFF] = v;
}
else
{
int offset = ~input.ReadUInt16() & 0xFFFF;
int count = Math.Min ((offset & 0xF) + 3, output.Length - dst);
offset >>= 4;
while (count --> 0)
{
byte v = frame[offset++ & 0xFFF];
output[dst++] = frame[frame_pos++ & 0xFFF] = v;
}
}
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("Tb1Format.Write not implemented");
}
}
}