public override ImageData Read(IBinaryStream file, ImageMetaData info)
{
var meta = (AbcMetaData)info;
using (var reader = new AbcDecoder(file.AsStream, meta.UnpackedSize))
{
var data = reader.Unpack();
using (var input = new BinMemoryStream(data))
return(meta.SourceFormat.Read(input, meta.SourceInfo));
}
}
public override ImageMetaData ReadMetaData(IBinaryStream file)
{
int unpacked_size = file.ReadInt32();
if (unpacked_size < MinUnpackedSize || unpacked_size > MaxUnpackedSize)
{
return(null);
}
uint signature = file.ReadUInt32();
if ((signature & 0xFFFF) != 0x1321 && signature != 0x620A1122)
{
return(null);
}
using (var reader = new AbcDecoder(file.AsStream, Math.Min(0x6C, unpacked_size)))
{
var data = reader.Unpack();
ImageFormat format;
if (data.AsciiEqual(0, "BM"))
{
format = Bmp;
}
else if (data.AsciiEqual(0, "DDS "))
{
format = s_DdsFormat.Value;
}
else
{
return(null);
}
using (var input = new BinMemoryStream(data))
{
var info = format.ReadMetaData(input);
if (null == info)
{
return(null);
}
return(new AbcMetaData {
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
UnpackedSize = unpacked_size,
SourceFormat = format,
SourceInfo = info,
});
}
}
}
