GARbro-mirror/Legacy/ApplePie/ImageGT.cs

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//! \file ImageGT.cs
//! \date 2017 Dec 05
//! \brief ApplePie 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.ApplePie
{
internal class GtMetaData : ImageMetaData
{
public int Flags;
public uint DataOffset;
}
[Export(typeof(ImageFormat))]
public class GtFormat : ImageFormat
{
public override string Tag { get { return "GT/ApplePie"; } }
public override string Description { get { return "Apple Pie image format"; } }
public override uint Signature { get { return 0; } }
public GtFormat ()
{
Signatures = new uint[] { 0x0B105447, 0x06105447, 0x01105447, 0 };
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x10);
if (!header.AsciiEqual ("GT\x10"))
return null;
bool has_alpha = (header[3] & 8) != 0;
bool grayscale = (header[3] & 3) == 1;
return new GtMetaData {
Width = header.ToUInt16 (4),
Height = header.ToUInt16 (6),
BPP = grayscale ? 8 : has_alpha ? 32 : 24,
Flags = header[3],
DataOffset = header.ToUInt32 (8),
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var meta = (GtMetaData)info;
file.Position = meta.DataOffset;
if (0 != (meta.Flags & 8))
{
var pixels = UnpackRle (file, (int)meta.Width * (int)meta.Height);
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
}
else if (1 == (meta.Flags & 3))
{
var pixels = file.ReadBytes ((int)meta.Width * (int)meta.Height);
return ImageData.Create (info, PixelFormats.Gray8, null, pixels);
}
else
{
int stride = (int)meta.Width * 3;
var pixels = file.ReadBytes (stride * (int)meta.Height);
return ImageData.Create (info, PixelFormats.Bgr24, null, pixels, stride);
}
}
byte[] UnpackRle (IBinaryStream input, int count)
{
var output = new byte[count * 4];
int dst = 0;
while (count > 0)
{
int length = input.ReadInt32();
count -= length;
dst += length * 4;
length = input.ReadInt32();
count -= length;
input.Read (output, dst, length * 4);
dst += length * 4;
}
return output;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GtFormat.Write not implemented");
}
}
}