GARbro-mirror/ArcFormats/CsWare/ImageB5.cs

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2018-03-27 18:09:54 +08:00
//! \file ImageB5.cs
//! \date 2018 Mar 26
//! \brief CsWare 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;
namespace GameRes.Formats.CsWare
{
internal class B5MetaData : ImageMetaData
{
public bool SwapRgb;
}
[Export(typeof(ImageFormat))]
public class B5Format : ImageFormat
{
public override string Tag { get { return "B5"; } }
public override string Description { get { return "CsWare image format"; } }
public override uint Signature { get { return 0x773562; } } // 'b5w'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (8);
return new B5MetaData {
Width = header.ToUInt16 (4),
Height = header.ToUInt16 (6),
BPP = 16,
SwapRgb = header[2] != 'w',
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new B5Reader (file, (B5MetaData)info);
reader.Unpack();
return ImageData.Create (info, PixelFormats.Bgr555, null, reader.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("B5Format.Write not implemented");
}
}
internal class B5Reader
{
IBinaryStream m_input;
ushort[] m_output;
int m_width;
int m_height;
bool m_swap;
public Array Data { get { return m_output; } }
public B5Reader (IBinaryStream input, B5MetaData info)
{
m_input = input;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_swap = info.SwapRgb;
m_output = new ushort[m_width * m_height];
}
public void Unpack ()
{
InitOffsetsTable();
m_input.Position = 8;
int dst_row = 0;
for (int y = 0; y < m_height; ++y)
{
int dst = dst_row;
for (int w = m_width; w > 0; )
{
ushort v = m_input.ReadUInt16();
if (0 != (v & 0x8000))
{
if (m_swap)
v = (ushort)(((v | 0xFFE0) << 10) | (v >> 10) & 0x1F | v & 0x3E0);
else
v = (ushort)(v & 0x7FFF);
m_output[dst++] = v;
w--;
}
else
{
int count = v & 0xFF;
int src = m_offsets[v >> 8];
w -= count;
while (count --> 0)
{
m_output[dst] = m_output[dst+src];
++dst;
}
}
}
dst_row += m_width;
}
}
int[] m_offsets = new int[128];
void InitOffsetsTable ()
{
int i = 0;
for (int x = -1; x >= -8; --x)
{
m_offsets[i++] = x;
}
int offset = -m_width;
for (int y = 8; y > 0; --y)
{
for (int x = 6; x >= -8; --x)
{
m_offsets[i++] = offset + x;
}
offset -= m_width;
}
}
}
}