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//! \file ImageELG.cs
//! \date Wed Apr 22 03:14:49 2015
//! \brief Lucifen Easy Game System 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 System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Lucifen
{
internal class ElgMetaData : ImageMetaData
{
public int Type;
public int HeaderSize;
}
[Export(typeof(ImageFormat))]
public class ElgFormat : ImageFormat
{
public override string Tag { get { return "ELG"; } }
public override string Description { get { return "Lucifen Easy Game System image format"; } }
public override uint Signature { get { return 0x01474c45u; } } // 'ELG\001'
public ElgFormat ()
{
Signatures = new uint[] { 0x01474c45u, 0x08474c45u, 0x18474c45u, 0x20474c45u, 0x02474c45u };
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("ElgFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
stream.Seek (3, SeekOrigin.Current);
using (var input = new ArcView.Reader (stream))
{
int bpp = input.ReadByte();
int x = 0;
int y = 0;
int type = bpp;
int header_size = 8;
if (2 == type)
{
bpp = input.ReadByte();
header_size = 13;
}
else if (1 == type)
{
bpp = input.ReadByte();
x = input.ReadInt16();
y = input.ReadInt16();
header_size = 13;
}
else
type = 0;
if (8 != bpp && 24 != bpp && 32 != bpp)
return null;
uint w = input.ReadUInt16();
uint h = input.ReadUInt16();
if (2 == type)
{
x = input.ReadInt16();
y = input.ReadInt16();
}
return new ElgMetaData
{
Width = w,
Height = h,
OffsetX = x,
OffsetY = y,
BPP = bpp,
Type = type,
HeaderSize = header_size,
};
}
}
public override ImageData Read (Stream file, ImageMetaData info)
{
var meta = (ElgMetaData)info;
file.Position = meta.HeaderSize;
using (var reader = new Reader (file, meta))
{
reader.Unpack();
return ImageData.Create (meta, reader.Format, reader.Palette, reader.Data);
}
}
internal class Reader : IDisposable
{
int m_width;
int m_height;
int m_bpp;
int m_type;
BinaryReader m_input;
byte[] m_output;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_output; } }
public Reader (Stream stream, ElgMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_bpp = info.BPP;
m_type = info.Type;
m_output = new byte[m_width*m_height*m_bpp/8];
m_input = new ArcView.Reader (stream);
}
public void Unpack ()
{
if (2 == m_type)
{
while (0 != m_input.ReadByte())
{
int size = m_input.ReadInt32();
if (size < 4)
throw new InvalidFormatException();
m_input.BaseStream.Seek (size-4, SeekOrigin.Current);
}
}
if (8 == m_bpp)
{
Format = PixelFormats.Indexed8;
UnpackPalette();
UnpackIndexed (m_output);
}
else if (24 == m_bpp)
{
Format = PixelFormats.Bgr24;
UnpackRGB();
}
else
{
Format = PixelFormats.Bgra32;
UnpackRGBA();
UnpackAlpha();
}
}
void UnpackPalette ()
{
byte[] palette_data = new byte[0x400];
UnpackIndexed (palette_data);
var colors = new Color[256];
for (int i = 0; i < 256; ++i)
colors[i] = Color.FromRgb (palette_data[i*4+2], palette_data[i*4+1], palette_data[i*4]);
Palette = new BitmapPalette (colors);
}
void UnpackIndexed (byte[] output)
{
int dst = 0;
for (;;)
{
byte flags = m_input.ReadByte();
if (0xff == flags || dst >= m_output.Length)
break;
int count, pos;
if (0 == (flags & 0xc0))
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 33;
else
count = (flags & 0x1f) + 1;
for (int i = 0; i < count; ++i)
output[dst++] = m_input.ReadByte();
}
else if ((flags & 0xc0) == 0x40)
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 35;
else
count = (flags & 0x1f) + 3;
byte v = m_input.ReadByte();
for (int i = 0; i < count; ++i)
output[dst++] = v;
}
else
{
if ((flags & 0xc0) == 0x80)
{
if (0 == (flags & 0x30))
{
count = (flags & 0xf) + 2;
pos = m_input.ReadByte() + 2;
}
else if ((flags & 0x30) == 0x10)
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = m_input.ReadByte() + 4;
}
else if ((flags & 0x30) == 0x20)
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = 3;
}
else
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = 4;
}
}
else if (0 != (flags & 0x20))
{
pos = (flags & 0x1f) + 2;
count = 2;
}
else
{
pos = (flags & 0x1f) + 1;
count = 1;
}
int src = dst - pos;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
}
}
}
void UnpackRGBA ()
{
int dst = 0;
for (;;)
{
byte flags = m_input.ReadByte();
if (0xff == flags || dst >= m_output.Length)
break;
int count, pos, src;
if (0 == (flags & 0xc0))
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 33;
else
count = (flags & 0x1f) + 1;
for (int i = 0; i < count; ++i)
{
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = 0xff;
}
}
else if ((flags & 0xc0) == 0x40)
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 34;
else
count = (flags & 0x1f) + 2;
byte b = m_input.ReadByte();
byte g = m_input.ReadByte();
byte r = m_input.ReadByte();
for (int i = 0; i < count; ++i)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
m_output[dst++] = 0xff;
}
}
else if ((flags & 0xc0) == 0x80)
{
if (0 == (flags & 0x30))
{
count = (flags & 0xf) + 1;
pos = m_input.ReadByte() + 2;
}
else if ((flags & 0x30) == 0x10)
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 2;
count = m_input.ReadByte() + 1;
}
else if ((flags & 0x30) == 0x20)
{
byte tmp = m_input.ReadByte();
pos = ((((flags & 0xf) << 8) + tmp) << 8) + m_input.ReadByte() + 4098;
count = m_input.ReadByte() + 1;
}
else
{
if (0 != (flags & 8))
pos = ((flags & 0x7) << 8) + m_input.ReadByte() + 10;
else
pos = (flags & 0x7) + 2;
count = 1;
}
src = dst - 4 * pos;
Binary.CopyOverlapped (m_output, src, dst, count*4);
dst += count*4;
}
else
{
int y, x;
if (0 == (flags & 0x30))
{
if (0 == (flags & 0xc))
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = 0;
}
else if ((flags & 0xc) == 0x4)
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = -1;
}
else if ((flags & 0xc) == 0x8)
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = 1;
}
else
{
pos = ((flags & 0x3) << 8) + m_input.ReadByte() + 2058;
src = dst - 4 * pos;
Buffer.BlockCopy (m_output, src, m_output, dst, 4);
dst += 4;
continue;
}
}
else if ((flags & 0x30) == 0x10)
{
y = (flags & 0xf) + 1;
x = 0;
}
else if ((flags & 0x30) == 0x20)
{
y = (flags & 0xf) + 1;
x = -1;
}
else
{
y = (flags & 0xf) + 1;
x = 1;
}
src = dst + (x - m_width * y) * 4;
Buffer.BlockCopy (m_output, src, m_output, dst, 4);
dst += 4;
}
}
}
public void UnpackAlpha ()
{
int dst = 3;
for (;;)
{
byte flags = m_input.ReadByte();
if (0xff == flags || dst >= m_output.Length)
break;
int count, pos;
if (0 == (flags & 0xc0))
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 33;
else
count = (flags & 0x1f) + 1;
for (int i = 0; i < count; ++i)
{
m_output[dst] = m_input.ReadByte();
dst += 4;
}
}
else if (0x40 == (flags & 0xc0))
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 35;
else
count = (flags & 0x1f) + 3;
byte a = m_input.ReadByte();
for (int i = 0; i < count; ++i)
{
m_output[dst] = a;
dst += 4;
}
}
else
{
if (0x80 == (flags & 0xc0))
{
if (0 == (flags & 0x30))
{
count = (flags & 0xf) + 2;
pos = m_input.ReadByte() + 2;
}
else if (0x10 == (flags & 0x30))
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = m_input.ReadByte() + 4;
}
else if ((flags & 0x30) == 0x20)
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = 3;
}
else
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 3;
count = 4;
}
}
else if (0 != (flags & 0x20))
{
pos = (flags & 0x1f) + 2;
count = 2;
}
else
{
pos = (flags & 0x1f) + 1;
count = 1;
}
int src = dst - 4 * pos;
for (int i = 0; i < count; ++i)
{
m_output[dst] = m_output[src];
src += 4;
dst += 4;
}
}
}
}
void UnpackRGB ()
{
int dst = 0;
for (;;)
{
byte flags = m_input.ReadByte();
if (0xff == flags || dst >= m_output.Length)
break;
int count, pos, src;
if (0 == (flags & 0xc0))
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 33;
else
count = (flags & 0x1f) + 1;
for (int i = 0; i < count; ++i)
{
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
m_output[dst++] = m_input.ReadByte();
}
}
else if ((flags & 0xc0) == 0x40)
{
if (0 != (flags & 0x20))
count = ((flags & 0x1f) << 8) + m_input.ReadByte() + 34;
else
count = (flags & 0x1f) + 2;
byte b = m_input.ReadByte();
byte g = m_input.ReadByte();
byte r = m_input.ReadByte();
for (int i = 0; i < count; ++i)
{
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
}
}
else if ((flags & 0xc0) == 0x80)
{
if (0 == (flags & 0x30))
{
count = (flags & 0xf) + 1;
pos = m_input.ReadByte() + 2;
}
else if ((flags & 0x30) == 0x10)
{
pos = ((flags & 0xf) << 8) + m_input.ReadByte() + 2;
count = m_input.ReadByte() + 1;
}
else if ((flags & 0x30) == 0x20)
{
byte tmp = m_input.ReadByte();
pos = ((((flags & 0xf) << 8) + tmp) << 8) + m_input.ReadByte() + 4098;
count = m_input.ReadByte() + 1;
}
else
{
if (0 != (flags & 8))
pos = ((flags & 0x7) << 8) + m_input.ReadByte() + 10;
else
pos = (flags & 0x7) + 2;
count = 1;
}
src = dst - 3 * pos;
Binary.CopyOverlapped (m_output, src, dst, count*3);
dst += count*3;
}
else
{
int y, x;
if (0 == (flags & 0x30))
{
if (0 == (flags & 0xc))
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = 0;
}
else if ((flags & 0xc) == 0x4)
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = -1;
}
else if ((flags & 0xc) == 0x8)
{
y = ((flags & 0x3) << 8) + m_input.ReadByte() + 16;
x = 1;
}
else
{
pos = ((flags & 0x3) << 8) + m_input.ReadByte() + 2058;
src = dst - 3 * pos;
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src];
continue;
}
}
else if ((flags & 0x30) == 0x10)
{
y = (flags & 0xf) + 1;
x = 0;
}
else if ((flags & 0x30) == 0x20)
{
y = (flags & 0xf) + 1;
x = -1;
}
else
{
y = (flags & 0xf) + 1;
x = 1;
}
src = dst + (x - m_width * y) * 3;
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src];
}
}
}
#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
}
}
}