public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(20);
if (!header.AsciiEqual("*Pola* "))
{
return(null);
}
int unpacked_size = header.ToInt32(8);
using (var reader = new PolaReader(stream, 64))
{
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
{
var info = base.ReadMetaData(temp);
if (null == info)
{
return(null);
}
return(new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
UnpackedSize = unpacked_size,
});
}
}
}
public override ImageMetaData ReadMetaData(Stream stream)
{
var header = new byte[20];
if (20 != stream.Read(header, 0, 20))
{
return(null);
}
if (!Binary.AsciiEqual(header, "*Pola* "))
{
return(null);
}
int unpacked_size = LittleEndian.ToInt32(header, 8);
using (var reader = new PolaReader(stream, 64))
{
reader.Unpack();
using (var temp = new MemoryStream(reader.Data))
{
var info = base.ReadMetaData(temp);
if (null == info)
{
return(null);
}
return(new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
UnpackedSize = unpacked_size,
});
}
}
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (PolaMetaData)info;
stream.Position = meta.DataOffset;
var reader = new PolaReader(stream, meta.UnpackedSize);
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
return(base.Read(temp, info));
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as PolaMetaData;
if (null == meta)
{
throw new ArgumentException("PolaFormat.Read should be supplied with PolaMetaData", "info");
}
stream.Position = 0x14;
using (var reader = new PolaReader(stream, meta.UnpackedSize))
{
reader.Unpack();
using (var temp = new MemoryStream(reader.Data))
return(base.Read(temp, info));
}
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(20);
if (!header.AsciiEqual("*Pola"))
{
return(null);
}
bool new_version = header.AsciiEqual(5, "* ");
uint data_offset = new_version ? 20u : 13u;
int unpacked_size = header.ToInt32(8);
stream.Position = data_offset;
var reader = new PolaReader(stream, 64);
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
{
var info = base.ReadMetaData(temp);
if (null == info)
{
return(null);
}
if (!new_version)
{
unpacked_size = 0x10 + GetStride(info) * (int)info.Height;
}
return(new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
DataOffset = data_offset,
UnpackedSize = unpacked_size,
});
}
}
