GARbro-mirror/ArcFormats/ImageIAF.cs
2015-06-01 01:00:06 +04:00

239 lines
7.9 KiB
C#

//! \file ImageIAF.cs
//! \date Sun May 31 21:17:54 2015
//! \brief IAF 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;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Triangle
{
internal class IafMetaData : ImageMetaData
{
public int UnpackedSize;
public int PackType;
}
[Export(typeof(ImageFormat))]
public class IafFormat : BmpFormat
{
public override string Tag { get { return "IAF"; } }
public override string Description { get { return "Triangle compressed bitmap format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[12];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int x = LittleEndian.ToInt32 (header, 0);
int y = LittleEndian.ToInt32 (header, 4);
if (Math.Abs (x) > 4096 || Math.Abs (y) > 4096)
return null;
int unpacked_size = LittleEndian.ToInt32 (header, 8);
int pack_type = (unpacked_size >> 30) & 3;
unpacked_size &= (int)~0xC0000000;
byte[] bmp;
if (0 == pack_type)
{
using (var reader = new LzssReader (stream, (int)stream.Length-12, 0x26))
{
reader.Unpack();
bmp = reader.Data;
}
}
else if (2 == pack_type)
{
using (var reader = new RleReader (stream, (int)stream.Length-12, 0x26))
{
reader.Unpack();
bmp = reader.Data;
}
}
else if (1 == pack_type)
{
bmp = new byte[0x26];
stream.Read (bmp, 0, bmp.Length);
}
else
{
return null;
}
if (bmp[0] != 'B' && bmp[0] != 'C' || bmp[1] != 'M')
return null;
int width = LittleEndian.ToInt32 (bmp, 0x12);
int height = LittleEndian.ToInt32 (bmp, 0x16);
int bpp = LittleEndian.ToInt16 (bmp, 0x1c);
return new IafMetaData
{
Width = (uint)width,
Height = (uint)height,
OffsetX = x,
OffsetY = y,
BPP = bpp,
UnpackedSize = unpacked_size,
PackType = pack_type,
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as IafMetaData;
if (null == meta)
throw new ArgumentException ("IafFormat.Read should be supplied with IafMetaData", "info");
stream.Position = 12;
int packed_size = (int)stream.Length-12;
byte[] pixels;
if (2 == meta.PackType)
{
using (var reader = new RleReader (stream, packed_size, meta.UnpackedSize))
{
reader.Unpack();
pixels = reader.Data;
}
}
else if (0 == meta.PackType)
{
using (var reader = new LzssReader (stream, packed_size, meta.UnpackedSize))
{
reader.Unpack();
pixels = reader.Data;
}
}
else
{
pixels = new byte[meta.UnpackedSize];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
}
if ('C' == pixels[0])
{
pixels[0] = (byte)'B';
if (info.BPP > 8)
pixels = ConvertCM (pixels, (int)info.Width, (int)info.Height, info.BPP);
}
using (var bmp = new MemoryStream (pixels))
return base.Read (bmp, info);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("IafFormat.Write not implemented");
}
static byte[] ConvertCM (byte[] input, int width, int height, int bpp)
{
int src = LittleEndian.ToInt32 (input, 0x0a);
int pixel_size = bpp / 8;
var bitmap = new byte[input.Length];
Buffer.BlockCopy (input, 0, bitmap, 0, src);
int stride = width * pixel_size;
int i = src;
for (int p = 0; p < pixel_size; ++p)
{
for (int y = 0; y < height; ++y)
{
int pixel = y * stride + p;
for (int x = 0; x < width; ++x)
{
bitmap[src+pixel] = input[i++];
pixel += pixel_size;
}
}
}
return bitmap;
}
}
internal class RleReader : IDataUnpacker, IDisposable
{
BinaryReader m_input;
byte[] m_output;
int m_size;
public byte[] Data { get { return m_output; } }
public RleReader (Stream input, int input_length, int output_length)
{
m_input = new ArcView.Reader (input);
m_output = new byte[output_length];
m_size = input_length;
}
public void Unpack ()
{
int src = 0;
int dst = 0;
while (dst < m_output.Length && src < m_size)
{
byte ctl = m_input.ReadByte();
++src;
if (0 == ctl)
{
int count = m_input.ReadByte();
++src;
count = Math.Min (count, m_output.Length - dst);
int read = m_input.Read (m_output, dst, count);
dst += count;
src += count;
}
else
{
int count = ctl;
byte b = m_input.ReadByte();
++src;
count = Math.Min (count, m_output.Length - dst);
for (int i = 0; i < count; i++)
m_output[dst++] = b;
}
}
}
#region IDisposable Members
bool disposed = false;
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
protected virtual void Dispose (bool disposing)
{
if (!disposed)
{
if (disposing)
{
m_input.Dispose();
}
disposed = true;
}
}
#endregion
}
}