mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-19 09:24:12 +08:00
455 lines
16 KiB
C#
455 lines
16 KiB
C#
//! \file ImageWCG.cs
|
|
//! \date Sat Jul 19 23:07:32 2014
|
|
//! \brief Liar-soft WCG image format implementation.
|
|
//
|
|
// Copyright (C) 2014-2016 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.IO;
|
|
using System.ComponentModel.Composition;
|
|
using System.Windows.Media;
|
|
using System.Windows.Media.Imaging;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.Liar
|
|
{
|
|
[Export(typeof(ImageFormat))]
|
|
public class WcgFormat : ImageFormat
|
|
{
|
|
public override string Tag { get { return "WCG"; } }
|
|
public override string Description { get { return "Liar-soft proprietary image format"; } }
|
|
public override uint Signature { get { return 0x02714757; } }
|
|
public override bool CanWrite { get { return true; } }
|
|
|
|
public WcgFormat ()
|
|
{
|
|
Signatures = new uint[] { 0x02714757, 0xF2714757 };
|
|
}
|
|
|
|
public override ImageMetaData ReadMetaData (IBinaryStream file)
|
|
{
|
|
if (0x57 != file.ReadByte() || 0x47 != file.ReadByte())
|
|
return null;
|
|
uint flags = file.ReadUInt16();
|
|
if (1 != (flags & 0x0f) || 0x20 != file.ReadByte() || 0 != file.ReadByte())
|
|
return null;
|
|
var meta = new ImageMetaData();
|
|
file.Position = 8;
|
|
meta.Width = file.ReadUInt32();
|
|
meta.Height = file.ReadUInt32();
|
|
meta.BPP = 32;
|
|
return meta;
|
|
}
|
|
|
|
public override ImageData Read (IBinaryStream file, ImageMetaData info)
|
|
{
|
|
using (var reader = new Reader (file, info.Width * info.Height))
|
|
{
|
|
reader.Unpack();
|
|
return ImageData.Create (info, PixelFormats.Bgra32, null, reader.Data);
|
|
}
|
|
}
|
|
|
|
public override void Write (Stream file, ImageData image)
|
|
{
|
|
Stream stream = file;
|
|
bool buffer_used = false;
|
|
if (!stream.CanSeek)
|
|
{
|
|
stream = new MemoryStream();
|
|
buffer_used = true;
|
|
}
|
|
try
|
|
{
|
|
using (var writer = new Writer (stream, image.Bitmap))
|
|
{
|
|
writer.Pack();
|
|
}
|
|
if (buffer_used)
|
|
{
|
|
stream.Position = 0;
|
|
stream.CopyTo (file);
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (buffer_used)
|
|
stream.Dispose();
|
|
}
|
|
}
|
|
|
|
internal sealed class Reader : IDisposable
|
|
{
|
|
private byte[] m_data;
|
|
private IBinaryStream m_input;
|
|
private MsbBitStream m_bits;
|
|
private uint m_input_size;
|
|
private ushort[] m_index;
|
|
|
|
private uint m_next_ptr;
|
|
private uint m_next_size;
|
|
private uint m_src;
|
|
private uint m_src_size;
|
|
private int m_dst_size;
|
|
private int edi;
|
|
|
|
private int m_index_length_limit;
|
|
|
|
public byte[] Data { get { return m_data; } }
|
|
|
|
public Reader (IBinaryStream file, uint pixel_size)
|
|
{
|
|
m_data = new byte[pixel_size*4];
|
|
m_input_size = (uint)file.Length;
|
|
m_input = file;
|
|
m_bits = new MsbBitStream (file.AsStream, true);
|
|
}
|
|
|
|
public void Unpack ()
|
|
{
|
|
m_next_ptr = 16;
|
|
m_next_size = m_input_size-16;
|
|
if (Unpack (2))
|
|
Unpack (0);
|
|
for (uint i = 3; i < m_data.Length; i += 4)
|
|
m_data[i] = (byte)~m_data[i];
|
|
}
|
|
|
|
private bool Unpack (int offset)
|
|
{
|
|
m_src = m_next_ptr;
|
|
m_src_size = m_next_size;
|
|
m_dst_size = (int)(m_data.Length / 4);
|
|
if (m_src_size < 12)
|
|
throw new InvalidFormatException ("Invalid file size");
|
|
m_src_size -= 12;
|
|
m_input.Position = m_next_ptr;
|
|
int unpacked_size = m_input.ReadInt32();
|
|
uint data_size = m_input.ReadUInt32();
|
|
uint index_size = m_input.ReadUInt16(); // 8
|
|
|
|
if (unpacked_size != m_dst_size*2)
|
|
throw new InvalidFormatException ("Invalid image size");
|
|
|
|
if (0 == index_size || index_size*2 > m_src_size)
|
|
throw new InvalidFormatException ("Invalid palette size");
|
|
|
|
m_src_size -= index_size*2;
|
|
if (data_size > m_src_size)
|
|
throw new InvalidFormatException ("Invalid compressed data size");
|
|
|
|
uint data_pos = m_src + index_size*2 + 12;
|
|
edi = offset;
|
|
m_next_size = m_src_size - data_size;
|
|
m_next_ptr = data_pos + data_size;
|
|
m_src_size = data_size;
|
|
return DecodeStream (data_pos, index_size);
|
|
}
|
|
|
|
void ReadIndex (uint index_size)
|
|
{
|
|
m_input.Position = m_src+12;
|
|
m_index = new ushort[index_size];
|
|
for (int i = 0; i < index_size; ++i)
|
|
m_index[i] = m_input.ReadUInt16();
|
|
}
|
|
|
|
bool DecodeStream (uint data_pos, uint index_size)
|
|
{
|
|
ReadIndex (index_size);
|
|
m_input.Position = data_pos;
|
|
m_bits.Reset();
|
|
|
|
bool small_index = index_size < 0x1002;
|
|
m_index_length_limit = small_index ? 6 : 14;
|
|
int index_bit_length = small_index ? 3 : 4;
|
|
while (m_dst_size > 0)
|
|
{
|
|
int dst_count = 1;
|
|
int index_length = m_bits.GetBits (index_bit_length);
|
|
if (0 == index_length)
|
|
{
|
|
dst_count = m_bits.GetBits (4) + 2;
|
|
index_length = m_bits.GetBits (index_bit_length);
|
|
}
|
|
if (0 == index_length)
|
|
return false;
|
|
|
|
int index = GetIndex (index_length);
|
|
if (index >= index_size)
|
|
return false;
|
|
|
|
if (dst_count > m_dst_size)
|
|
return false;
|
|
m_dst_size -= dst_count;
|
|
ushort word = m_index[index];
|
|
do {
|
|
LittleEndian.Pack (word, m_data, edi);
|
|
edi += 4;
|
|
} while (0 != --dst_count);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int GetIndex (int count)
|
|
{
|
|
if (0 == --count)
|
|
return m_bits.GetNextBit();
|
|
if (count < m_index_length_limit)
|
|
return 1 << count | m_bits.GetBits (count);
|
|
while (0 != m_bits.GetNextBit())
|
|
{
|
|
if (count >= 0x10)
|
|
throw new InvalidFormatException ("Invalid index count");
|
|
++count;
|
|
}
|
|
return 1 << count | m_bits.GetBits (count);
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
if (!disposed)
|
|
{
|
|
m_bits.Dispose();
|
|
disposed = true;
|
|
}
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
private class Writer : IDisposable
|
|
{
|
|
private BinaryWriter m_out;
|
|
private uint m_width;
|
|
private uint m_height;
|
|
private uint m_pixels;
|
|
private byte[] m_data;
|
|
|
|
Dictionary<ushort, ushort> m_index = new Dictionary<ushort, ushort>();
|
|
private uint m_base_length;
|
|
private uint m_base_index_length;
|
|
private int m_bits;
|
|
|
|
public Writer (Stream stream, BitmapSource bitmap)
|
|
{
|
|
m_width = (uint)bitmap.PixelWidth;
|
|
m_height = (uint)bitmap.PixelHeight;
|
|
m_pixels = m_width*m_height;
|
|
if (bitmap.Format != PixelFormats.Bgra32)
|
|
{
|
|
var converted_bitmap = new FormatConvertedBitmap();
|
|
converted_bitmap.BeginInit();
|
|
converted_bitmap.Source = bitmap;
|
|
converted_bitmap.DestinationFormat = PixelFormats.Bgra32;
|
|
converted_bitmap.EndInit();
|
|
bitmap = converted_bitmap;
|
|
}
|
|
m_data = new byte[m_pixels*4];
|
|
bitmap.CopyPixels (m_data, bitmap.PixelWidth*4, 0);
|
|
m_out = new BinaryWriter (stream, Encoding.ASCII, true);
|
|
}
|
|
|
|
public void Pack ()
|
|
{
|
|
byte[] header = { (byte)'W', (byte)'G', 0x71, 2, 0x20, 0, 0, 0x40 };
|
|
m_out.Write (header, 0, header.Length);
|
|
m_out.Write (m_width);
|
|
m_out.Write (m_height);
|
|
|
|
Pack (1, 0xff00);
|
|
Pack (0, 0);
|
|
}
|
|
|
|
ushort GetWord (int offset)
|
|
{
|
|
return (ushort)(m_data[offset*2] | m_data[offset*2+1] << 8);
|
|
}
|
|
|
|
private void Pack (int data, ushort mask)
|
|
{
|
|
var header_pos = m_out.Seek (0, SeekOrigin.Current);
|
|
m_out.Seek (12, SeekOrigin.Current);
|
|
|
|
BuildIndex (data, mask);
|
|
bool small_index = m_index.Count < 0x1002;
|
|
m_base_length = small_index ? 3u : 4u;
|
|
m_base_index_length = small_index ? 7u : 15u;
|
|
m_bits = 1;
|
|
|
|
// encode
|
|
for (uint i = 0; i < m_pixels;)
|
|
{
|
|
ushort word = GetWord (data);
|
|
data += 2;
|
|
++i;
|
|
ushort color = m_index[(ushort)(word^mask)];
|
|
uint count = 1;
|
|
while (i < m_pixels)
|
|
{
|
|
if (word != GetWord (data))
|
|
break;
|
|
++count;
|
|
data += 2;
|
|
++i;
|
|
if (0x11 == count)
|
|
break;
|
|
}
|
|
if (count > 1)
|
|
{
|
|
PutBits (m_base_length, 0);
|
|
PutBits (4, count-2);
|
|
}
|
|
PutIndex (color);
|
|
}
|
|
Flush();
|
|
|
|
var end_pos = m_out.Seek (0, SeekOrigin.Current);
|
|
uint data_size = (uint)(end_pos - header_pos - 12 - m_index.Count*2);
|
|
m_out.Seek ((int)header_pos, SeekOrigin.Begin);
|
|
m_out.Write (m_pixels*2u);
|
|
m_out.Write (data_size);
|
|
m_out.Write ((ushort)m_index.Count);
|
|
m_out.Write ((ushort)(small_index ? 7 : 14)); // 0x0e
|
|
m_out.Seek ((int)end_pos, SeekOrigin.Begin);
|
|
}
|
|
|
|
void BuildIndex (int data, ushort mask)
|
|
{
|
|
m_index.Clear();
|
|
uint[] freq_table = new uint[65536];
|
|
for (var data_end = data + m_pixels*2; data < data_end; data += 2)
|
|
freq_table[GetWord (data)^mask]++;
|
|
|
|
var index = new List<ushort>();
|
|
for (int i = 0; i < freq_table.Length; ++i)
|
|
{
|
|
if (0 != freq_table[i])
|
|
index.Add ((ushort)i);
|
|
}
|
|
index.Sort ((a, b) => freq_table[a] < freq_table[b] ? 1 : freq_table[a] == freq_table[b] ? 0 : -1);
|
|
ushort j = 0;
|
|
foreach (var color in index)
|
|
{
|
|
m_out.Write (color);
|
|
m_index.Add (color, j++);
|
|
}
|
|
}
|
|
|
|
void Flush ()
|
|
{
|
|
if (1 != m_bits)
|
|
{
|
|
do
|
|
m_bits <<= 1;
|
|
while (0 == (m_bits & 0x100));
|
|
m_out.Write ((byte)(m_bits & 0xff));
|
|
m_bits = 1;
|
|
}
|
|
}
|
|
|
|
void PutBit (bool bit)
|
|
{
|
|
m_bits <<= 1;
|
|
m_bits |= bit ? 1 : 0;
|
|
if (0 != (m_bits & 0x100))
|
|
{
|
|
m_out.Write ((byte)(m_bits & 0xff));
|
|
m_bits = 1;
|
|
}
|
|
}
|
|
|
|
void PutBits (uint length, uint x)
|
|
{
|
|
x <<= (int)(32-length);
|
|
while (0 != length--)
|
|
{
|
|
PutBit (0 != (x & 0x80000000));
|
|
x <<= 1;
|
|
}
|
|
}
|
|
|
|
static uint GetBitsLength (ushort val)
|
|
{
|
|
uint length = 0;
|
|
do
|
|
{
|
|
++length;
|
|
val >>= 1;
|
|
}
|
|
while (0 != val);
|
|
return length;
|
|
}
|
|
|
|
void PutIndex (ushort index)
|
|
{
|
|
uint length = GetBitsLength (index);
|
|
|
|
if (length < m_base_index_length)
|
|
{
|
|
PutBits (m_base_length, length);
|
|
if (1 == length)
|
|
PutBit (index != 0);
|
|
else
|
|
PutBits (length-1, index);
|
|
}
|
|
else
|
|
{
|
|
PutBits (m_base_length, m_base_index_length);
|
|
for (uint i = m_base_index_length; i < length; ++i)
|
|
PutBit (true);
|
|
PutBit (false);
|
|
PutBits (length-1, index);
|
|
}
|
|
}
|
|
|
|
#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_out.Dispose();
|
|
m_out = null;
|
|
m_data = null;
|
|
m_index = null;
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
}
|