GARbro-mirror/ArcFormats/Triangle/ImageTRI.cs
2019-01-27 02:29:19 +04:00

128 lines
4.6 KiB
C#

//! \file ImageTRI.cs
//! \date 2018 Jul 22
//! \brief Triangle image format.
//
// 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 System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Triangle
{
internal class TriMetaData : ImageMetaData
{
public int UnpackedSize;
}
[Export(typeof(ImageFormat))]
public class TriFormat : ImageFormat
{
public override string Tag { get { return "TRI"; } }
public override string Description { get { return "Triangle image format"; } }
public override uint Signature { get { return 0x7A495254; } } // 'TRIz'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (8);
var bmp_header = new byte[56];
Unpack (file, bmp_header);
using (var bmp = new BinMemoryStream (bmp_header, file.Name))
{
var bmp_info = Bmp.ReadMetaData (bmp);
if (null == bmp_info)
return null;
return new TriMetaData {
Width = bmp_info.Width,
Height = bmp_info.Height,
BPP = bmp_info.BPP,
UnpackedSize = header.ToInt32 (4) ^ 0x65641538,
};
}
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var meta = (TriMetaData)info;
var output = new byte[meta.UnpackedSize];
file.Position = 8;
Unpack (file, output);
using (var bmp = new BinMemoryStream (output, file.Name))
{
var decoder = new BmpBitmapDecoder (bmp, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var frame = decoder.Frames[0];
frame.Freeze();
return new ImageData (frame, info);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("TriFormat.Write not implemented");
}
internal static void Unpack (IBinaryStream input, byte[] output)
{
int dst = 0;
byte key = 0x7F;
byte prev_key = 0;
uint ctl = 0;
while (dst < output.Length)
{
uint bit = ctl & 0x80000000;
ctl <<= 1;
if (0 == ctl)
{
ctl = input.ReadUInt32();
bit = ctl & 0x80000000;
ctl <<= 1;
}
if (0 == bit)
{
prev_key = key;
key ^= input.ReadUInt8();
output[dst++] = key;
}
else
{
int offset = input.ReadUInt16();
offset += (int)ctl;
int count = (offset >> 12) & 0xF;
if (0 == count)
{
count = (prev_key + input.ReadUInt8()) & 0xFF;
if (0 == count)
break;
count += 15;
}
count = Math.Min (count + 2, output.Length - dst);
Binary.CopyOverlapped (output, dst + ~(offset & 0xFFF), dst, count);
dst += count;
}
}
}
}
}