GARbro-mirror/ArcFormats/ShiinaRio/ImageCHD.cs
2018-04-07 03:03:38 +04:00

131 lines
4.6 KiB
C#

//! \file ImageCHD.cs
//! \date 2017 Dec 09
//! \brief Forest 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.Forest
{
internal class ChdMetaData : ImageMetaData
{
public uint FirstOffset;
}
/// <summary>
/// ShiinaRio images predecessor.
/// </summary>
[Export(typeof(ImageFormat))]
public class ChdFormat : ImageFormat
{
public override string Tag { get { return "CHD"; } }
public override string Description { get { return "Forest image format"; } }
public override uint Signature { get { return 0x444843; } } // 'CHD'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
file.Position = 4;
int count = file.ReadInt32();
if (count < 0 || count > 0xFFFFF)
return null;
file.ReadInt32();
uint first_offset = 0;
for (int i = 0; i < count && 0 == first_offset; ++i)
first_offset = file.ReadUInt32();
if (0 == first_offset)
return null;
file.Position = first_offset;
var info = new ChdMetaData();
info.Width = file.ReadUInt32();
info.Height = file.ReadUInt32();
info.OffsetX = file.ReadInt32();
info.OffsetY = file.ReadInt32();
info.FirstOffset = first_offset+0x10;
info.BPP = 32;
return info;
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new ChdReader (file, (ChdMetaData)info);
var pixels = reader.Unpack();
return ImageData.Create (info, PixelFormats.Gray8, null, pixels);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("ChdFormat.Write not implemented");
}
}
internal class ChdReader
{
IBinaryStream m_input;
int m_width;
int m_height;
uint m_origin;
public ChdReader (IBinaryStream input, ChdMetaData info)
{
m_input = input;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_origin = info.FirstOffset;
}
public byte[] Unpack ()
{
m_input.Position = m_origin;
var rows = new uint[m_height];
for (int i = 0; i < m_height; ++i)
rows[i] = m_input.ReadUInt32();
var output = new byte[m_height*m_width];
for (int y = 0; y < m_height; ++y)
{
m_input.Position = rows[y];
int dst = y * m_width;
for (int w = m_width; w > 0; )
{
int count = m_input.ReadUInt8();
if (0xFF == count)
count = m_input.ReadUInt16();
int x = w - count;
if (0 == x)
break;
count = m_input.ReadUInt8();
if (0 == count)
count = m_input.ReadUInt16();
m_input.Read (output, dst, count);
for (int i = 0; i < count; ++i)
output[dst+i] += 0x57;
dst += count;
w = x - count;
}
}
return output;
}
}
}