GARbro-mirror/ArcFormats/ImageMAI.cs

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2015-05-04 02:06:09 +08:00
//! \file ImageMAI.cs
//! \date Sun May 03 10:26:35 2015
//! \brief MAI image formats implementation.
//
// 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.Text;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.MAI
{
internal class CmpMetaData : ImageMetaData
{
public int Colors;
public bool IsCompressed;
public uint DataOffset;
public uint DataLength;
}
[Export(typeof(ImageFormat))]
public class CmpFormat : ImageFormat
{
public override string Tag { get { return "CMP/MAI"; } }
public override string Description { get { return "MAI image format"; } }
public override uint Signature { get { return 0; } }
public CmpFormat ()
{
Extensions = new string[] { "cmp" };
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("CmpFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
if ('C' != stream.ReadByte() || 'M' != stream.ReadByte())
return null;
var header = new byte[0x1e];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
if (1 != header[0x0c])
return null;
uint size = LittleEndian.ToUInt32 (header, 0);
if (size != stream.Length)
return null;
var info = new CmpMetaData();
info.Width = LittleEndian.ToUInt16 (header, 4);
info.Height = LittleEndian.ToUInt16 (header, 6);
info.Colors = LittleEndian.ToUInt16 (header, 8);
info.BPP = header[0x0a];
info.IsCompressed = 0 != header[0x0b];
info.DataOffset = LittleEndian.ToUInt32 (header, 0x0e);
info.DataLength = LittleEndian.ToUInt32 (header, 0x12);
if (info.DataLength > size)
return null;
return info;
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as CmpMetaData;
if (null == meta)
throw new ArgumentException ("CmpFormat.Read should be supplied with CmpMetaData", "info");
var reader = new Reader (stream, meta);
reader.Unpack();
return ImageData.CreateFlipped (info, reader.Format, reader.Palette, reader.Data, reader.Stride);
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}
internal class Reader
{
private Stream m_input;
private int m_width;
private int m_height;
private int m_pixel_size;
private bool m_compressed;
private int m_data_length;
private byte[] m_pixels;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_pixels; } }
public int Stride { get { return m_width * m_pixel_size; } }
public Reader (Stream stream, CmpMetaData info)
{
m_input = stream;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP/8;
m_compressed = info.IsCompressed;
m_data_length = (int)info.DataLength;
switch (m_pixel_size)
{
case 1: Format = PixelFormats.Indexed8; break;
case 3: Format = PixelFormats.Bgr24; break;
case 4: Format = PixelFormats.Bgr32; break;
default: throw new InvalidFormatException ("Invalid color depth");
}
m_input.Position = info.DataOffset;
if (info.Colors > 0)
Palette = RleDecoder.ReadPalette (m_input, info.Colors, 3);
int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
m_pixels = new byte[size];
}
public void Unpack ()
{
if (m_compressed)
RleDecoder.Unpack (m_input, m_data_length, m_pixels, m_pixel_size);
else
m_input.Read (m_pixels, 0, m_pixels.Length);
}
}
}
internal class AmiMetaData : CmpMetaData
{
public uint MaskWidth;
public uint MaskHeight;
public uint MaskOffset;
public uint MaskLength;
public bool IsMaskCompressed;
}
[Export(typeof(ImageFormat))]
public class AmiFormat : ImageFormat
{
public override string Tag { get { return "AM/MAI"; } }
public override string Description { get { return "MAI image with alpha-channel"; } }
public override uint Signature { get { return 0; } }
public AmiFormat ()
{
Extensions = new string[] { "am", "ami" };
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("AmiFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
if ('A' != stream.ReadByte() || 'M' != stream.ReadByte())
return null;
var header = new byte[0x30];
if (0x2e != stream.Read (header, 2, 0x2e))
return null;
uint size = LittleEndian.ToUInt32 (header, 2);
if (size != stream.Length)
return null;
int am_type = header[0x16];
if (am_type != 2 && am_type != 1 || header[0x18] != 1)
return null;
var info = new AmiMetaData();
info.Width = LittleEndian.ToUInt16 (header, 6);
info.Height = LittleEndian.ToUInt16 (header, 8);
info.MaskWidth = LittleEndian.ToUInt16 (header, 0x0a);
info.MaskHeight = LittleEndian.ToUInt16 (header, 0x0c);
info.Colors = LittleEndian.ToUInt16 (header, 0x12);
info.BPP = header[0x14];
info.IsCompressed = 0 != header[0x15];
info.DataOffset = LittleEndian.ToUInt32 (header, 0x1a);
info.DataLength = LittleEndian.ToUInt32 (header, 0x1e);
info.MaskOffset = LittleEndian.ToUInt32 (header, 0x22);
info.MaskLength = LittleEndian.ToUInt32 (header, 0x26);
info.IsMaskCompressed = 0 != header[0x2a];
if (checked(info.DataLength + info.MaskLength) > size)
return null;
return info;
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as AmiMetaData;
if (null == meta)
throw new ArgumentException ("AmiFormat.Read should be supplied with AmiMetaData", "info");
var reader = new Reader (stream, meta);
reader.Unpack();
return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
}
internal class Reader
{
private Stream m_input;
private AmiMetaData m_info;
private int m_width;
private int m_height;
private int m_pixel_size;
private byte[] m_output;
private byte[] m_alpha;
private byte[] m_pixels;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_pixels; } }
public Reader (Stream stream, AmiMetaData info)
{
m_input = stream;
m_info = info;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP/8;
if (m_pixel_size != 3 && m_pixel_size != 4)
throw new InvalidFormatException ("Invalid color depth");
Format = PixelFormats.Bgra32;
int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
m_output = new byte[size];
uint mask_size = info.IsMaskCompressed ? info.MaskWidth*info.MaskHeight : info.MaskLength;
m_alpha = new byte[mask_size];
m_pixels = new byte[m_width*m_height*4];
}
public void Unpack ()
{
m_input.Position = m_info.DataOffset;
if (m_info.Colors > 0)
Palette = RleDecoder.ReadPalette (m_input, m_info.Colors, 3);
if (m_info.IsCompressed)
RleDecoder.Unpack (m_input, (int)m_info.DataLength, m_output, m_pixel_size);
else
m_input.Read (m_output, 0, m_output.Length);
m_input.Position = m_info.MaskOffset;
if (m_info.IsMaskCompressed)
RleDecoder.Unpack (m_input, (int)m_info.MaskLength, m_alpha, 1);
else
m_input.Read (m_alpha, 0, m_alpha.Length);
int stride = m_width * m_pixel_size;
for (int y = 0; y < m_height; ++y)
{
int dst_line = y*m_width;
int src_line = (m_height-1-y)*m_width;
for (int x = 0; x < m_width; ++x)
{
m_pixels[(dst_line+x)*4] = m_output[(src_line+x)*m_pixel_size];
m_pixels[(dst_line+x)*4+1] = m_output[(src_line+x)*m_pixel_size+1];
m_pixels[(dst_line+x)*4+2] = m_output[(src_line+x)*m_pixel_size+2];
m_pixels[(dst_line+x)*4+3] = m_alpha[dst_line+x];
}
}
}
}
}
[Export(typeof(ImageFormat))]
public class MaskFormat : ImageFormat
{
public override string Tag { get { return "MSK/MAI"; } }
public override string Description { get { return "MAI indexed image format"; } }
public override uint Signature { get { return 0; } }
public MaskFormat ()
{
Extensions = new string[] { "msk" };
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("AmiFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
uint size = input.ReadUInt32();
if (size != stream.Length)
return null;
uint width = input.ReadUInt32();
uint height = input.ReadUInt32();
if ((width*height + 0x410) != size)
return null;
return new ImageMetaData {
Width = width,
Height = height,
BPP = 8
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
stream.Position = 0x10;
var palette = RleDecoder.ReadPalette (stream, 0x100, 4);
byte[] pixels = new byte[info.Width*info.Height];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException();
return ImageData.Create (info, PixelFormats.Indexed8, palette, pixels);
}
}
internal class RleDecoder
{
public static BitmapPalette ReadPalette (Stream input, int colors, int color_size)
{
var palette_data = new byte[colors*color_size];
if (palette_data.Length != input.Read (palette_data, 0, palette_data.Length))
throw new InvalidFormatException();
var palette = new Color[colors];
for (int i = 0; i < palette.Length; ++i)
{
int c = i * color_size;
palette[i] = Color.FromRgb (palette_data[c+2], palette_data[c+1], palette_data[c]);
}
return new BitmapPalette (palette);
}
static public void Unpack (Stream input, int input_size, byte[] output, int pixel_size)
{
int read = 0;
int dst = 0;
while (read < input_size && dst < output.Length)
{
int code = input.ReadByte();
++read;
if (-1 == code)
throw new InvalidFormatException ("Unexpected end of file");
if (0x80 == code)
throw new InvalidFormatException ("Invalid run-length code");
if (code < 0x80)
{
int count = Math.Min (code * pixel_size, output.Length - dst);
if (count != input.Read (output, dst, count))
break;
read += count;
dst += count;
}
else
{
int count = code & 0x7f;
if (pixel_size != input.Read (output, dst, pixel_size))
break;
read += pixel_size;
int src = dst;
dst += pixel_size;
count = Math.Min ((count - 1) * pixel_size, output.Length - dst);
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
}
}
}
}
}