GARbro-mirror/ArcFormats/GameSystem/ImageCGD.cs

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//! \file ImageCGD.cs
//! \date Mon Jan 16 05:22:43 2017
//! \brief 'Game System' CG 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.GameSystem
{
[Export(typeof(ImageFormat))]
public class CgdFormat : ImageFormat
{
public override string Tag { get { return "CGD"; } }
public override string Description { get { return "'GameSystem' CG image format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
if (file.Signature != file.Length)
return null;
var header = file.ReadHeader (0x10);
uint width = header.ToUInt32 (4);
uint height = header.ToUInt32 (8);
if (0 == width || width > 0x8000 || 0 == height || height > 0x8000)
return null;
return new ImageMetaData
{
Width = width,
Height = height,
BPP = 24,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new CgdReader (file, info);
var pixels = reader.Unpack();
return ImageData.CreateFlipped (info, reader.Format, null, pixels, reader.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("CgdFormat.Write not implemented");
}
}
internal sealed class CgdReader
{
IBinaryStream m_input;
int m_width;
int m_height;
byte[] m_output;
public int Stride { get; private set; }
public PixelFormat Format { get { return PixelFormats.Bgr24; } }
public byte[] Data { get { return m_output; } }
public CgdReader (IBinaryStream input, ImageMetaData info)
{
m_input = input;
m_width = (int)info.Width;
m_height = (int)info.Height;
Stride = 3 * m_width;
m_output = new byte[Stride * m_height];
}
public byte[] Unpack ()
{
m_input.Position = 0x10;
int dst = 0;
byte r = 0, g = 0, b = 0;
while (dst < m_output.Length)
{
int ctl = m_input.ReadUInt8();
if (ctl < 0x80)
{
int src = m_input.ReadUInt8() | ctl << 8;
b += ColorTable[src,0];
g += ColorTable[src,1];
r += ColorTable[src,2];
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
}
else if (ctl < 0xC0)
{
int count = ctl - 0x7F;
while (count --> 0)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
}
}
else if (0xFF == ctl)
{
break;
}
else
{
int count = (ctl - 0xBF) * 3;
m_input.Read (m_output, dst, count);
dst += count;
b = m_output[dst-3];
g = m_output[dst-2];
r = m_output[dst-1];
}
}
return m_output;
}
static readonly byte[,] ColorTable = InitColorTable();
private static byte[,] InitColorTable ()
{
var table = new byte[0x8000,3];
for (int i = 0; i < 0x8000; ++i)
{
int r = (i >> 10) & 0x1F;
int g = (i >> 5) & 0x1F;
int b = i & 0x1F;
if (r > 15)
r -= 32;
if (g > 15)
g -= 32;
if ( b > 15 )
b -= 32;
table[i,0] = (byte)b;
table[i,1] = (byte)g;
table[i,2] = (byte)r;
}
return table;
}
}
}