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GARbro-mirror/ArcFormats/Macromedia/ImageBITD.cs
morkt 77fde27d26 bunch of stuff.
2023-08-24 01:33:50 +04:00

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//! \file ImageBITD.cs
//! \date Fri Jun 26 07:45:01 2015
//! \brief Selen 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Macromedia
{
[Export(typeof(ImageFormat))]
public class BitdFormat : ImageFormat
{
public override string Tag { get { return "BITD"; } }
public override string Description { get { return "Selen RLE-compressed bitmap"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
if (stream.Length > 0xffffff)
return null;
var scanner = new BitdScanner (stream.AsStream);
return scanner.GetInfo();
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
var reader = new BitdReader (stream.AsStream, info);
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("BitdFormat.Write not implemented");
}
}
internal class BitdScanner
{
Stream m_input;
protected Stream Input { get { return m_input; } }
public BitdScanner (Stream input)
{
m_input = input;
}
const int MaxScanLine = 2048;
public ImageMetaData GetInfo ()
{
int total = 0;
var scan_lines = new Dictionary<int, int>();
var key_lines = new List<int>();
for (;;)
{
int b = m_input.ReadByte();
if (-1 == b)
break;
int count = b;
if (b > 0x7f)
count = (byte)-(sbyte)b;
++count;
if (count > 0x7f)
return null;
if (b > 0x7f)
{
if (-1 == m_input.ReadByte())
return null;
}
else
m_input.Seek (count, SeekOrigin.Current);
key_lines.Clear();
key_lines.AddRange (scan_lines.Keys);
foreach (var line in key_lines)
{
int width = scan_lines[line];
if (width < count)
scan_lines.Remove (line);
else if (width == count)
scan_lines[line] = line;
else
scan_lines[line] = width - count;
}
total += count;
if (total <= MaxScanLine && total >= 8)
scan_lines[total] = total;
if (total > MaxScanLine && !scan_lines.Any())
return null;
}
int rem;
total = Math.DivRem (total, 4, out rem);
if (rem != 0)
return null;
var valid_lines = from line in scan_lines where line.Key == line.Value
orderby line.Key
select line.Key;
bool is_eof = -1 == m_input.ReadByte();
foreach (var width in valid_lines)
{
int height = Math.DivRem (total, width, out rem);
if (0 == rem)
{
return new ImageMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = 32,
};
}
}
return null;
}
}
internal class BitdReader : BitdScanner
{
byte[] m_output;
int m_width;
int m_height;
public byte[] Data { get { return m_output; } }
public PixelFormat Format { get; private set; }
public BitdReader (Stream input, ImageMetaData info) : base (input)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_output = new byte[m_width * m_height * 4];
Format = PixelFormats.Bgra32;
}
public void Unpack ()
{
int stride = m_width * 4;
var scan_line = new byte[stride];
for (int line = 0; line < m_output.Length; line += stride)
{
int dst = 0;
while (dst < stride)
{
int b = Input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
int count = b;
if (b > 0x7f)
count = (byte)-(sbyte)b;
++count;
if (dst + count > stride)
throw new InvalidFormatException();
if (b > 0x7f)
{
b = Input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
for (int i = 0; i < count; ++i)
scan_line[dst++] = (byte)b;
}
else
{
Input.Read (scan_line, dst, count);
dst += count;
}
}
dst = line;
for (int x = 0; x < m_width; ++x)
{
m_output[dst++] = scan_line[x+m_width*3];
m_output[dst++] = scan_line[x+m_width*2];
m_output[dst++] = scan_line[x+m_width];
m_output[dst++] = scan_line[x];
}
}
}
}
internal class BitdDecoder : IImageDecoder
{
Stream m_input;
byte[] m_output;
int m_width;
int m_height;
int m_stride;
ImageMetaData m_info;
ImageData m_image;
BitmapPalette m_palette;
public Stream Source { get => m_input; }
public ImageFormat SourceFormat { get => null; }
public ImageMetaData Info { get => m_info; }
public ImageData Image { get => m_image ?? (m_image = GetImageData()); }
public PixelFormat Format { get; private set; }
public BitdDecoder (Stream input, ImageMetaData info, BitmapPalette palette)
{
m_input = input;
m_info = info;
m_width = info.iWidth;
m_height = info.iHeight;
m_stride = (m_width * m_info.BPP + 7) / 8;
m_stride = (m_stride + 1) & ~1;
m_output = new byte[m_stride * m_height];
Format = info.BPP == 4 ? PixelFormats.Indexed4
: info.BPP == 8 ? PixelFormats.Indexed8
: info.BPP == 16 ? PixelFormats.Bgr555
: PixelFormats.Bgr32;
m_palette = palette;
}
protected ImageData GetImageData ()
{
if (Info.BPP <= 8)
Unpack8bpp();
else
UnpackChannels (Info.BPP / 8);
return ImageData.Create (m_info, Format, m_palette, m_output, m_stride);
}
void Unpack8bpp ()
{
for (int line = 0; line < m_output.Length; line += m_stride)
{
int x = 0;
while (x < m_stride)
{
int b = m_input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
int count = b;
if (b > 0x7f)
count = (byte)-(sbyte)b;
++count;
if (x + count > m_stride)
throw new InvalidFormatException();
if (b > 0x7f)
{
b = m_input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
for (int i = 0; i < count; ++i)
m_output[line + x++] = (byte)b;
}
else
{
m_input.Read (m_output, line + x, count);
x += count;
}
}
}
}
public void UnpackChannels (int channels)
{
var scan_line = new byte[m_stride];
for (int line = 0; line < m_output.Length; line += m_stride)
{
int x = 0;
while (x < m_stride)
{
int b = m_input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
int count = b;
if (b > 0x7f)
count = (byte)-(sbyte)b;
++count;
if (x + count > m_stride)
throw new InvalidFormatException();
if (b > 0x7f)
{
b = m_input.ReadByte();
if (-1 == b)
throw new InvalidFormatException ("Unexpected end of file");
for (int i = 0; i < count; ++i)
scan_line[x++] = (byte)b;
}
else
{
m_input.Read (scan_line, x, count);
x += count;
}
}
int dst = line;
for (int i = 0; i < m_width; ++i)
{
for (int src = m_width * (channels - 1); src >= 0; src -= m_width)
m_output[dst++] = scan_line[i + src];
}
}
}
#region IDisposable Members
bool m_disposed = false;
public void Dispose ()
{
if (!m_disposed)
{
m_input.Dispose();
m_disposed = true;
}
GC.SuppressFinalize (this);
}
#endregion
}
}
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