GARbro-mirror/ArcFormats/Silky/ImageAKB.cs
2017-02-07 13:51:58 +04:00

216 lines
8.2 KiB
C#

//! \file ImageAKB.cs
//! \date Sat Nov 28 13:09:20 2015
//! \brief Ai6Win engine 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 GameRes.Compression;
using GameRes.Utility;
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.Silky
{
internal class AkbMetaData : ImageMetaData
{
public byte[] Background;
public int InnerWidth;
public int InnerHeight;
public uint Flags;
public string BaseFileName;
public uint DataOffset;
}
[Export(typeof(ImageFormat))]
public class AkbFormat : ImageFormat
{
public override string Tag { get { return "AKB"; } }
public override string Description { get { return "AI6WIN engine image format"; } }
public override uint Signature { get { return 0x20424B41; } } // 'AKB '
public AkbFormat ()
{
Signatures = new uint[] { 0x20424B41, 0x2B424b41 };
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var info = new AkbMetaData();
bool is_incremental = '+' == (file.ReadUInt32() >> 24);
info.Width = file.ReadUInt16();
info.Height = file.ReadUInt16();
info.Flags = file.ReadUInt32();
info.BPP = 0 == (info.Flags & 0x40000000) ? 32 : 24;
info.Background = file.ReadBytes (4);
info.OffsetX = file.ReadInt32();
info.OffsetY = file.ReadInt32();
info.InnerWidth = file.ReadInt32() - info.OffsetX;
info.InnerHeight = file.ReadInt32() - info.OffsetY;
if (info.InnerWidth > info.Width || info.InnerHeight > info.Height)
return null;
if (is_incremental)
info.BaseFileName = file.ReadCString (0x20);
info.DataOffset = (uint)file.Position;
return info;
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var meta = (AkbMetaData)info;
byte[] background = null;
if (!string.IsNullOrEmpty (meta.BaseFileName))
{
background = ReadBaseImage (meta.BaseFileName, meta);
}
var reader = new AkbReader (file.AsStream, (AkbMetaData)info);
var image = reader.Unpack (background);
return ImageData.Create (info, reader.Format, null, image, reader.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("AkbFormat.Write not implemented");
}
byte[] ReadBaseImage (string filename, AkbMetaData overlay_info)
{
var pattern = Path.GetFileNameWithoutExtension (filename) + ".*";
pattern = VFS.CombinePath (VFS.GetDirectoryName (filename), pattern);
foreach (var entry in VFS.GetFiles (pattern))
{
if (entry.Name == overlay_info.FileName)
continue;
using (var base_file = VFS.OpenBinaryStream (entry))
{
var base_info = ReadMetaData (base_file) as AkbMetaData;
if (null != base_info && base_info.BPP == overlay_info.BPP
&& base_info.Width == overlay_info.Width && base_info.Height == overlay_info.Height)
{
// FIXME what if baseline image is incremental itself?
var reader = new AkbReader (base_file.AsStream, base_info);
return reader.Unpack();
}
}
}
return null;
}
}
internal class AkbReader
{
Stream m_input;
AkbMetaData m_info;
int m_pixel_size;
public PixelFormat Format { get; private set; }
public int Stride { get; private set; }
public AkbReader (Stream input, AkbMetaData info)
{
m_input = input;
m_info = info;
m_pixel_size = m_info.BPP / 8;
Stride = (int)m_info.Width * m_pixel_size;
if (24 == m_info.BPP)
Format = PixelFormats.Bgr24;
else if (0 == (m_info.Flags & 0x80000000))
Format = PixelFormats.Bgr32;
else
Format = PixelFormats.Bgra32;
}
public byte[] Unpack (byte[] background = null)
{
if (0 == m_info.InnerWidth || 0 == m_info.InnerHeight)
return background ?? CreateBackground();
m_input.Position = m_info.DataOffset;
int inner_stride = m_info.InnerWidth * m_pixel_size;
var pixels = new byte[m_info.InnerHeight * inner_stride];
using (var lz = new LzssStream (m_input, LzssMode.Decompress, true))
{
for (int pos = pixels.Length - inner_stride; pos >= 0; pos -= inner_stride)
{
if (inner_stride != lz.Read (pixels, pos, inner_stride))
throw new InvalidFormatException();
}
}
RestoreDelta (pixels, inner_stride);
if (null == background && m_info.InnerWidth == m_info.Width && m_info.InnerHeight == m_info.Height)
return pixels;
var image = background ?? CreateBackground();
int src = 0;
int dst = m_info.OffsetY * Stride + m_info.OffsetX * m_pixel_size;
Action blend_row;
if (null == background)
{
blend_row = () => Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
}
else
{
blend_row = () => {
for (int x = 0; x < inner_stride; x += m_pixel_size)
{
if (0x00 != pixels[src+x] || 0xFF != pixels[src+x+1] || 0x00 != pixels[src+x+2])
{
for (int i = 0; i < m_pixel_size; ++i)
image[dst+x+i] = pixels[src+x+i];
}
}
};
}
for (int y = 0; y < m_info.InnerHeight; ++y)
{
blend_row();
dst += Stride;
src += inner_stride;
}
return image;
}
private void RestoreDelta (byte[] pixels, int stride)
{
int src = 0;
for (int i = m_pixel_size; i < stride; ++i)
pixels[i] += pixels[src++];
src = 0;
for (int i = stride; i < pixels.Length; ++i)
pixels[i] += pixels[src++];
}
private byte[] CreateBackground ()
{
var pixels = new byte[Stride * (int)m_info.Height];
if (0 != LittleEndian.ToInt32 (m_info.Background, 0))
{
for (int i = 0; i < Stride; i += m_pixel_size)
Buffer.BlockCopy (m_info.Background, 0, pixels, i, m_pixel_size);
Binary.CopyOverlapped (pixels, 0, Stride, pixels.Length-Stride);
}
return pixels;
}
}
}