GARbro-mirror/ArcFormats/AliceSoft/ImageQNT.cs
2016-07-29 18:15:54 +04:00

194 lines
7.5 KiB
C#

//! \file ImageQNT.cs
//! \date Thu Apr 09 21:37:18 2015
//! \brief AliceSoft RGB image format.
//
// Copyright (C) 2015 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;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.AliceSoft
{
public class QntMetaData : ImageMetaData
{
public uint RGBSize;
public uint AlphaSize;
}
[Export(typeof(ImageFormat))]
public class QntFormat : ImageFormat
{
public override string Tag { get { return "QNT"; } }
public override string Description { get { return "AliceSoft System image format"; } }
public override uint Signature { get { return 0x544e51; } } // 'QNT'
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("QntFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x44];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int version = LittleEndian.ToInt32 (header, 4);
if (version <= 0 || version > 2)
return null;
if (0x44 != LittleEndian.ToUInt32 (header, 8))
return null;
uint width = LittleEndian.ToUInt32 (header, 0x14);
uint height = LittleEndian.ToUInt32 (header, 0x18);
if (0 == width || 0 == height)
return null;
return new QntMetaData
{
Width = width,
Height = height,
OffsetX = LittleEndian.ToInt32 (header, 0x0c),
OffsetY = LittleEndian.ToInt32 (header, 0x10),
BPP = LittleEndian.ToInt32 (header, 0x1c),
RGBSize = LittleEndian.ToUInt32 (header, 0x24),
AlphaSize = LittleEndian.ToUInt32 (header, 0x28),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
stream.Position = 0x44;
var reader = new Reader (stream, (QntMetaData)info);
reader.Unpack();
int stride = (int)info.Width * (reader.BPP / 8);
PixelFormat format = 24 == reader.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
return ImageData.Create (info, format, null, reader.Data, stride);
}
internal class Reader
{
byte[] m_input;
byte[] m_alpha;
byte[] m_output;
int m_bpp;
int m_width;
int m_height;
public byte[] Data { get { return m_output; } }
public int BPP { get { return m_bpp*8; } }
public Reader (Stream stream, QntMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
int w = (m_width + 1) & ~1;
int h = (m_height + 1) & ~1;
int rgb_size = h * w * 3;
m_bpp = info.AlphaSize != 0 ? 4 : 3;
m_input = new byte[rgb_size];
var alpha_pos = stream.Position + info.RGBSize;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (rgb_size != zstream.Read (m_input, 0, rgb_size))
throw new InvalidFormatException ("Unexpected end of file");
if (info.AlphaSize != 0)
{
int alpha_size = w * m_height;
m_alpha = new byte[alpha_size];
stream.Position = alpha_pos;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (alpha_size != zstream.Read (m_alpha, 0, alpha_size))
throw new InvalidFormatException ("Unexpected end of file");
}
m_output = new byte[info.Width*info.Height*m_bpp];
}
public void Unpack ()
{
int src = 0;
int dst;
int stride = m_bpp * m_width;
for (int channel = 0; channel < 3; ++channel)
{
dst = channel;
for (int y = m_height >> 1; y != 0; --y)
{
for (int x = 0; x < m_width; ++x)
{
m_output[dst] = m_input[src++];
m_output[dst+stride] = m_input[src++];
dst += m_bpp;
}
dst += stride;
src += 2 * (m_width & 1);
}
if (0 != (m_height & 1))
{
for (int x = 0; x < m_width; ++x)
{
m_output[dst] = m_input[src];
src += 2;
dst += m_bpp;
}
src += 2 * (m_width & 1);
}
}
if (3 != m_bpp)
{
src = 0;
dst = 3;
for (int y = 0; y < m_height; ++y)
{
for (int x = 0; x < m_width; ++x)
{
m_output[dst] = m_alpha[src++];
dst += 4;
}
src += m_width & 1;
}
}
dst = m_bpp;
int i;
for (i = stride-m_bpp; i != 0; --i)
{
int b = m_output[dst-m_bpp] - m_output[dst];
m_output[dst++] = (byte)b;
}
for (int j = m_height - 1; j != 0; --j)
{
for (i = 0; i != m_bpp; ++i)
{
m_output[dst] = (byte)(m_output[dst-stride] - m_output[dst]);
++dst;
}
for (i = stride-m_bpp; i != 0; --i)
{
int b = ((int)m_output[dst-stride] + m_output[dst-m_bpp]) >> 1;
b -= m_output[dst];
m_output[dst++] = (byte)b;
}
}
}
}
}
}