public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(0x11);
int version = header[2] - '0';
if (!header.AsciiEqual("GR") || version < 1 || version > 3)
{
return(null);
}
var info = new GrpMetaData {
Width = header.ToUInt32(5),
Height = header.ToUInt32(9),
BPP = header.ToUInt16(3),
Version = version
};
if (version > 1)
{
info.UnpackedSize = header.ToInt32(0xD);
}
else
{
info.UnpackedSize = (int)info.Width * (int)info.Height * info.BPP / 8
+ (info.BPP == 8 ? 0x300 : 0);
}
return(info);
}
public GrpReader(IBinaryStream input, GrpMetaData info)
{
m_input = input;
m_output = new byte[info.UnpackedSize];
if (24 == info.BPP)
{
Format = PixelFormats.Bgr24;
}
else if (32 == info.BPP)
{
Format = PixelFormats.Bgr32;
}
else
{
throw new NotSupportedException("Not supported GRP image color depth");
}
}
public GrpReader(IBinaryStream input, GrpMetaData info)
{
m_input = input;
m_output = new byte[info.UnpackedSize];
m_info = info;
switch (info.BPP)
{
case 8: Format = PixelFormats.Indexed8; break;
case 16: Format = PixelFormats.Bgr555; break;
case 24: Format = PixelFormats.Bgr24; break;
case 32: Format = PixelFormats.Bgr32; break;
default: throw new NotSupportedException("Not supported GRP image color depth");
}
m_count_bits = info.Version > 2 ? 3 : 5;
m_count_mask = ~(-1 << m_count_bits);
}
public GrpReader(Stream input, GrpMetaData info)
{
m_input = new ArcView.Reader (input);
m_output = new byte[info.UnpackedSize];
if (24 == info.BPP)
Format = PixelFormats.Bgr24;
else if (32 == info.BPP)
Format = PixelFormats.Bgr32;
else
throw new NotSupportedException ("Not supported GRP image color depth");
}
