GARbro-mirror/ArcFormats/Ikura/ImageGGS.cs

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//! \file ImageGGS.cs
//! \date 2018 Jan 16
//! \brief D.O. compressed 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.Ikura
{
[Export(typeof(ImageFormat))]
public class GgsFormat : ImageFormat
{
public override string Tag { get { return "GGS"; } }
public override string Description { get { return "D.O. image format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
if (!file.Name.HasExtension (".ggs"))
return null;
int x = file.ReadInt16();
int y = file.ReadInt16();
uint w = file.ReadUInt16();
uint h = file.ReadUInt16();
if (0 == w || 0 == h || w > 0x4000 || h > 0x4000 || x < 0 || y < 0)
return null;
return new ImageMetaData { Width = w, Height = h, OffsetX = x, OffsetY = y, BPP = 24 };
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new GgsReader (file, info);
var pixels = reader.Unpack();
return ImageData.Create (info, reader.Format, null, pixels);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GgsFormat.Write not implemented");
}
}
internal class GgsReader
{
IBinaryStream m_input;
byte[] m_output;
public PixelFormat Format { get { return PixelFormats.Bgr24; } }
public GgsReader (IBinaryStream input, ImageMetaData info)
{
m_input = input;
m_output = new byte[3 * info.Width * info.Height];
}
public byte[] Unpack ()
{
m_input.Position = 8;
for (int channel = 0; channel < 3; ++channel)
{
int dst = channel;
while (dst < m_output.Length)
{
int count;
byte ctl = m_input.ReadUInt8();
if (0 == ctl--)
{
count = m_input.ReadUInt8();
byte v = m_input.ReadUInt8();
while (count --> 0)
{
m_output[dst] = v;
dst += 3;
}
}
else if (0 == ctl--)
{
count = m_input.ReadUInt8();
int offset = m_input.ReadUInt8();
while (count --> 0)
{
m_output[dst] = m_output[dst-offset];
dst += 3;
}
}
else if (0 == ctl--)
{
count = m_input.ReadUInt8();
int offset = m_input.ReadUInt16();
while (count --> 0)
{
m_output[dst] = m_output[dst-offset];
dst += 3;
}
}
else if (0 == ctl--)
{
dst += m_input.ReadUInt8();
}
else if (0 == ctl)
{
dst += m_input.ReadUInt16();
}
else
{
count = ctl;
while (count --> 0)
{
m_output[dst] = m_input.ReadUInt8();
dst += 3;
}
}
}
}
return m_output;
}
}
}