GARbro-mirror/ArcFormats/CatSystem/ImageHG3.cs

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//! \file ImageHG3.cs
//! \date Sat Jul 19 17:31:09 2014
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//! \brief CatSystem HG3 image format implementation.
//
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// Copyright (C) 2014-2015 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.IO;
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using System.Linq;
using System.ComponentModel.Composition;
using System.Windows.Media.Imaging;
using System.Windows.Media;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.CatSystem
{
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internal class Hg3MetaData : ImageMetaData
{
public uint CanvasWidth;
public uint CanvasHeight;
public uint HeaderSize;
}
[Export(typeof(ImageFormat))]
public class Hg3Format : ImageFormat
{
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public override string Tag { get { return "HG3"; } }
public override string Description { get { return "CatSystem engine image format"; } }
public override uint Signature { get { return 0x332d4748; } } // 'HG-3'
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x4c];
if (0x4c != stream.Read (header, 0, header.Length))
return null;
if (LittleEndian.ToUInt32 (header, 4) != 0x0c)
return null;
if (!Binary.AsciiEqual (header, 0x14, "stdinfo\0"))
return null;
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return new Hg3MetaData
{
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HeaderSize = LittleEndian.ToUInt32 (header, 0x1C),
Width = LittleEndian.ToUInt32 (header, 0x24),
Height = LittleEndian.ToUInt32 (header, 0x28),
OffsetX = LittleEndian.ToInt32 (header, 0x30),
OffsetY = LittleEndian.ToInt32 (header, 0x34),
BPP = LittleEndian.ToInt32 (header, 0x2C),
CanvasWidth = LittleEndian.ToUInt32 (header, 0x44),
CanvasHeight = LittleEndian.ToUInt32 (header, 0x48),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
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var meta = info as Hg3MetaData;
if (null == meta)
throw new ArgumentException ("Hg3Format.Read should be supplied with Hg3MetaData", "info");
if (0x20 != meta.BPP)
throw new NotSupportedException ("Not supported HG-3 color depth");
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using (var input = new StreamRegion (stream, 0x14, true))
using (var reader = new Hg3Reader (input, meta))
{
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var pixels = reader.Unpack();
int stride = (int)info.Width * info.BPP / 8;
if (reader.Flipped)
return ImageData.CreateFlipped (info, PixelFormats.Bgra32, null, pixels, stride);
else
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("Hg3Format.Write not implemented");
}
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}
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internal sealed class Hg3Reader : IDisposable
{
BinaryReader m_input;
Hg3MetaData m_info;
int m_pixel_size;
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public bool Flipped { get; private set; }
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public Hg3Reader (Stream input, Hg3MetaData info)
{
m_input = new ArcView.Reader (input);
m_info = info;
m_pixel_size = m_info.BPP / 8;
}
public byte[] Unpack ()
{
m_input.BaseStream.Position = m_info.HeaderSize;
var img_type = m_input.ReadChars (8);
if (img_type.SequenceEqual ("img0000\0"))
return UnpackImg0000();
else if (img_type.SequenceEqual ("img_jpg\0"))
return UnpackJpeg();
else
throw new NotSupportedException ("Not supported HG-3 image");
}
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byte[] UnpackImg0000 ()
{
Flipped = true;
m_input.BaseStream.Position = m_info.HeaderSize+0x18;
uint packed_data_size = m_input.ReadUInt32();
int data_size = m_input.ReadInt32();
uint packed_ctl_size = m_input.ReadUInt32();
int ctl_size = m_input.ReadInt32();
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uint data_offset = m_info.HeaderSize + 0x28;
uint ctl_offset = data_offset + packed_data_size;
var data = new byte[data_size];
using (var z = new StreamRegion (m_input.BaseStream, data_offset, packed_data_size, true))
using (var data_in = new ZLibStream (z, CompressionMode.Decompress))
if (data_size != data_in.Read (data, 0, data.Length))
throw new EndOfStreamException();
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using (var z = new StreamRegion (m_input.BaseStream, ctl_offset, packed_ctl_size, true))
using (var ctl_in = new ZLibStream (z, CompressionMode.Decompress))
using (var bits = new LsbBitStream (ctl_in))
{
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bool copy = bits.GetNextBit() != 0;
int output_size = GetBitCount (bits);
var output = new byte[output_size];
int src = 0;
int dst = 0;
while (dst < output_size)
{
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int count = GetBitCount (bits);
if (copy)
{
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Buffer.BlockCopy (data, src, output, dst, count);
src += count;
}
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dst += count;
copy = !copy;
}
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return ApplyDelta (output);
}
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}
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byte[] UnpackJpeg ()
{
Flipped = false;
m_input.ReadInt32();
var jpeg_size = m_input.ReadInt32();
long next_section = m_input.BaseStream.Position + jpeg_size;
var decoder = new JpegBitmapDecoder (m_input.BaseStream,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var frame = decoder.Frames[0];
if (frame.Format.BitsPerPixel < 24)
throw new NotSupportedException ("Not supported HG-3 JPEG color depth");
int src_pixel_size = frame.Format.BitsPerPixel/8;
int stride = (int)m_info.Width * src_pixel_size;
var pixels = new byte[stride*(int)m_info.Height];
frame.CopyPixels (pixels, stride, 0);
var output = new byte[m_info.Width*m_info.Height*4];
uint total = m_info.Width * m_info.Height;
int src = 0;
int dst = 0;
for (uint i = 0; i < total; ++i)
{
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output[dst++] = pixels[src];
output[dst++] = pixels[src+1];
output[dst++] = pixels[src+2];
output[dst++] = 0xFF;
src += src_pixel_size;
}
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m_input.BaseStream.Position = next_section;
var section_header = m_input.ReadChars (8);
if (!section_header.SequenceEqual ("img_al\0\0"))
return output;
m_input.BaseStream.Seek (8, SeekOrigin.Current);
int alpha_size = m_input.ReadInt32();
using (var alpha_in = new StreamRegion (m_input.BaseStream, m_input.BaseStream.Position+4, alpha_size, true))
using (var alpha = new ZLibStream (alpha_in, CompressionMode.Decompress))
{
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for (int i = 3; i < output.Length; i += 4)
{
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int b = alpha.ReadByte();
if (-1 == b)
throw new EndOfStreamException();
output[i] = (byte)b;
}
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return output;
}
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}
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static int GetBitCount (LsbBitStream bits)
{
int n = 0;
while (0 == bits.GetNextBit())
{
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++n;
if (n >= 0x20)
throw new InvalidFormatException ("Overflow at Hg3Reader.GetBitCount");
}
int value = 1;
while (n --> 0)
{
value = (value << 1) | bits.GetNextBit();
}
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return value;
}
byte[] ApplyDelta (byte[] pixels)
{
uint[] table1 = new uint[0x100];
uint[] table2 = new uint[0x100];
uint[] table3 = new uint[0x100];
uint[] table4 = new uint[0x100];
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for (uint i = 0; i < 0x100; ++i)
{
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uint val = i & 0xC0;
val <<= 6;
val |= i & 0x30;
val <<= 6;
val |= i & 0x0C;
val <<= 6;
val |= i & 0x03;
table4[i] = val;
table3[i] = val << 2;
table2[i] = val << 4;
table1[i] = val << 6;
}
int plane_size = pixels.Length / 4;
int plane1 = 0;
int plane2 = plane1 + plane_size;
int plane3 = plane2 + plane_size;
int plane4 = plane3 + plane_size;
byte[] output = new byte[pixels.Length];
int dst = 0;
while (dst < output.Length)
{
uint val = table1[pixels[plane1++]] | table2[pixels[plane2++]]
| table3[pixels[plane3++]] | table4[pixels[plane4++]];
output[dst++] = ConvertValue ((byte)val);
output[dst++] = ConvertValue ((byte)(val >> 8));
output[dst++] = ConvertValue ((byte)(val >> 16));
output[dst++] = ConvertValue ((byte)(val >> 24));
}
int stride = (int)m_info.Width * m_pixel_size;
for (int x = m_pixel_size; x < stride; x++)
{
output[x] += output[x - m_pixel_size];
}
int line = stride;
for (uint y = 1; y < m_info.Height; y++)
{
int prev = line - stride;
for (int x = 0; x < stride; x++)
{
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output[line+x] += output[prev+x];
}
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line += stride;
}
return output;
}
static byte ConvertValue (byte val)
{
bool carry = 0 != (val & 1);
val >>= 1;
return (byte)(carry ? val ^ 0xFF : val);
}
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
}
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#endregion
}
}