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(AKB): incremental images.

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This commit is contained in:
morkt
2017-02-07 00:31:27 +04:00
parent ebd08887d1
commit 077495d50b
1 changed files with 67 additions and 8 deletions
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75
ArcFormats/Silky/ImageAKB.cs
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@@ -38,6 +38,8 @@ namespace GameRes.Formats.Silky
public int InnerWidth;
public int InnerHeight;
public uint Flags;
public string BaseFileName;
public uint DataOffset;
}
[Export(typeof(ImageFormat))]
@@ -47,10 +49,15 @@ namespace GameRes.Formats.Silky
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)
{
file.ReadInt32();
var info = new AkbMetaData();
bool is_incremental = '+' == (file.ReadUInt32() >> 24);
info.Width = file.ReadUInt16();
info.Height = file.ReadUInt16();
info.Flags = file.ReadUInt32();
@@ -62,13 +69,22 @@ namespace GameRes.Formats.Silky
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();
var image = reader.Unpack (background);
return ImageData.Create (info, reader.Format, null, image, reader.Stride);
}
@@ -76,6 +92,29 @@ namespace GameRes.Formats.Silky
{
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
@@ -101,12 +140,12 @@ namespace GameRes.Formats.Silky
Format = PixelFormats.Bgra32;
}
public byte[] Unpack ()
public byte[] Unpack (byte[] background = null)
{
if (0 == m_info.InnerWidth || 0 == m_info.InnerHeight)
return CreateBackground();
return background ?? CreateBackground();
m_input.Position = 0x20;
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))
@@ -118,15 +157,35 @@ namespace GameRes.Formats.Silky
}
}
RestoreDelta (pixels, inner_stride);
if (m_info.InnerWidth == m_info.Width && m_info.InnerHeight == m_info.Height)
if (null == background && m_info.InnerWidth == m_info.Width && m_info.InnerHeight == m_info.Height)
return pixels;
var image = CreateBackground();
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 (pixels[src+x ] != m_info.Background[0] ||
pixels[src+x+1] != m_info.Background[1] ||
pixels[src+x+2] != m_info.Background[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)
{
Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
blend_row();
dst += Stride;
src += inner_stride;
}