GARbro-mirror/ArcFormats/Triangle/ImageIAF.cs

323 lines
12 KiB
C#

//! \file ImageIAF.cs
//! \date Sun May 31 21:17:54 2015
//! \brief IAF image format.
//
// Copyright (C) 2015-2016 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.Triangle
{
internal class IafMetaData : ImageMetaData
{
public int DataOffset;
public int PackedSize;
public int UnpackedSize;
public int PackType;
}
[Export(typeof(ImageFormat))]
public class IafFormat : BmpFormat
{
public override string Tag { get { return "IAF"; } }
public override string Description { get { return "Triangle compressed bitmap format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x14];
if (12 != stream.Read (header, 0, 12))
return null;
int data_offset;
int packed_size0 = LittleEndian.ToInt32 (header, 0);
int packed_size1 = LittleEndian.ToInt32 (header, 1);
int x, y, packed_size, unpacked_size;
if (5+packed_size1+0x14 == stream.Length)
{
packed_size = packed_size1;
data_offset = 5;
stream.Seek (-0x14, SeekOrigin.End);
if (0x14 != stream.Read (header, 0, 0x14))
return null;
x = LittleEndian.ToInt32 (header, 0);
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 0x10);
}
else if (4+packed_size0+0xC == stream.Length)
{
packed_size = packed_size0;
data_offset = 4;
stream.Seek (-12, SeekOrigin.End);
if (12 != stream.Read (header, 0, 12))
return null;
x = LittleEndian.ToInt32 (header, 0);
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 8);
}
else
{
packed_size = (int)stream.Length-12;
data_offset = 12;
x = LittleEndian.ToInt32 (header, 0);
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 8);
}
if (Math.Abs (x) > 4096 || Math.Abs (y) > 4096)
return null;
int pack_type = (unpacked_size >> 30) & 3;
if (3 == pack_type)
return null;
unpacked_size &= (int)~0xC0000000;
stream.Position = data_offset;
byte[] bmp = UnpackBitmap (stream, pack_type, packed_size, 0x26);
if (bmp[0] != 'B' && bmp[0] != 'C' || bmp[1] != 'M')
return null;
return new IafMetaData
{
Width = LittleEndian.ToUInt32 (bmp, 0x12),
Height = LittleEndian.ToUInt32 (bmp, 0x16),
OffsetX = x,
OffsetY = y,
BPP = LittleEndian.ToInt16 (bmp, 0x1c),
DataOffset = data_offset,
PackedSize = packed_size,
UnpackedSize = unpacked_size,
PackType = pack_type,
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (IafMetaData)info;
stream.Position = meta.DataOffset;
var bitmap = UnpackBitmap (stream, meta.PackType, meta.PackedSize, meta.UnpackedSize);
if ('C' == bitmap[0])
{
bitmap[0] = (byte)'B';
if (info.BPP > 8)
bitmap = ConvertCM (bitmap, (int)info.Width, (int)info.Height, info.BPP);
}
if (info.BPP >= 24) // currently alpha channel could be applied to 24+bpp bitmaps only
{
try
{
int bmp_size = LittleEndian.ToInt32 (bitmap, 2);
if (bitmap.Length - bmp_size > 0x36) // size of bmp header
{
if ('B' == bitmap[bmp_size] && 'M' == bitmap[bmp_size+1] &&
8 == bitmap[bmp_size+0x1c]) // 8bpp
{
uint alpha_width = LittleEndian.ToUInt32 (bitmap, bmp_size+0x12);
uint alpha_height = LittleEndian.ToUInt32 (bitmap, bmp_size+0x16);
if (info.Width == alpha_width && info.Height == alpha_height)
return BitmapWithAlphaChannel (info, bitmap, bmp_size);
}
}
}
catch
{
// ignore any errors occured during alpha-channel read attempt,
// fallback to a plain bitmap
}
}
using (var bmp = new MemoryStream (bitmap))
return base.Read (bmp, info);
}
internal static byte[] UnpackBitmap (Stream stream, int pack_type, int packed_size, int unpacked_size)
{
if (2 == pack_type)
{
using (var reader = new RleReader (stream, packed_size, unpacked_size))
{
reader.Unpack();
return reader.Data;
}
}
else if (0 == pack_type)
{
using (var reader = new LzssReader (stream, packed_size, unpacked_size))
{
reader.Unpack();
return reader.Data;
}
}
else if (1 == pack_type)
{
var bitmap = new byte[unpacked_size];
if (bitmap.Length != stream.Read (bitmap, 0, bitmap.Length))
throw new InvalidFormatException ("Unexpected end of file");
return bitmap;
}
else
throw new InvalidFormatException();
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("IafFormat.Write not implemented");
}
static ImageData BitmapWithAlphaChannel (ImageMetaData info, byte[] bitmap, int alpha_offset)
{
int info_offset = alpha_offset+0x0E;
int palette_offset = info_offset + LittleEndian.ToInt32 (bitmap, info_offset);
int src_pixels = LittleEndian.ToInt32 (bitmap, 0x0A);
int src_alpha = alpha_offset + LittleEndian.ToInt32 (bitmap, alpha_offset+0x0A);
int colors = (src_alpha - palette_offset) / 4;
var alpha_map = new byte[0x100];
if (colors > 0)
{
for (int i = 0; i < colors; ++i)
{
byte b = bitmap[palette_offset];
byte g = bitmap[palette_offset+1];
byte r = bitmap[palette_offset+2];
alpha_map[i] = (byte)((b + g + r) / 3);
palette_offset += 4;
}
}
else
{
for (int i = 0; i < 0x100; ++i)
alpha_map[i] = (byte)i;
}
int src_pixel_size = info.BPP/8;
int src_stride = (int)info.Width*src_pixel_size;
var pixels = new byte[info.Width * info.Height * 4];
int dst = 0;
for (int y = (int)info.Height-1; y >= 0; --y)
{
int src = src_pixels + y*src_stride;
int alpha = src_alpha + y*(int)info.Width;
for (uint x = 0; x < info.Width; ++x)
{
pixels[dst++] = bitmap[src];
pixels[dst++] = bitmap[src+1];
pixels[dst++] = bitmap[src+2];
pixels[dst++] = (byte)~alpha_map[bitmap[alpha++]];
src += src_pixel_size;
}
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
}
static byte[] ConvertCM (byte[] input, int width, int height, int bpp)
{
int src = LittleEndian.ToInt32 (input, 0x0a);
int pixel_size = bpp / 8;
var bitmap = new byte[input.Length];
Buffer.BlockCopy (input, 0, bitmap, 0, src);
int stride = width * pixel_size;
int i = src;
for (int p = 0; p < pixel_size; ++p)
{
for (int y = 0; y < height; ++y)
{
int pixel = y * stride + p;
for (int x = 0; x < width; ++x)
{
bitmap[src+pixel] = input[i++];
pixel += pixel_size;
}
}
}
return bitmap;
}
}
internal class RleReader : IDataUnpacker, IDisposable
{
BinaryReader m_input;
byte[] m_output;
int m_size;
public byte[] Data { get { return m_output; } }
public RleReader (Stream input, int input_length, int output_length)
{
m_input = new ArcView.Reader (input);
m_output = new byte[output_length];
m_size = input_length;
}
public void Unpack ()
{
int src = 0;
int dst = 0;
while (dst < m_output.Length && src < m_size)
{
byte ctl = m_input.ReadByte();
++src;
if (0 == ctl)
{
int count = m_input.ReadByte();
++src;
count = Math.Min (count, m_output.Length - dst);
int read = m_input.Read (m_output, dst, count);
dst += count;
src += count;
}
else
{
int count = ctl;
byte b = m_input.ReadByte();
++src;
count = Math.Min (count, m_output.Length - dst);
for (int i = 0; i < count; i++)
m_output[dst++] = b;
}
}
}
#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
}
}