private static void ParseVerbatim(IImage image, BinaryParser parser)
{
int size = image.Width * image.Height;
if (image is Image <byte> )
{
var image8 = image as Image <byte>;
image8.Data = new byte[size * image.Channels];
for (int channel = 0; channel < image.Channels; ++channel)
{
for (int i = 0; i < size; ++i)
{
image8.Data[channel * (i * image.Channels)] = parser.Byte();
}
}
}
if (image is Image <short> )
{
var image16 = image as Image <short>;
image16.Data = new short[size * image.Channels];
for (int channel = 0; channel < image.Channels; ++channel)
{
for (int i = 0; i < size; ++i)
{
image16.Data[channel + (i * image.Channels)] = parser.Int16BE();
}
}
}
}
public static IImage ImageFromBytes(byte[] bytes)
{
var parser = new BinaryParser(bytes);
if (parser.Int16BE() != 474)
{
throw new InvalidDataException("invalid header");
}
var storage = parser.Byte();
IImage image = ImageFromBytesPerPixel(parser.Byte());
if (image == null)
{
throw new InvalidDataException("invalid bpc");
}
var dimension = parser.UInt16BE();
image.Width = parser.UInt16BE();
image.Height = parser.UInt16BE();
image.Channels = parser.UInt16BE();
if (dimension != 3)
{
image.Channels = 1;
}
parser.Position += 92;
var colormap = parser.Int32BE();
if (colormap != 0)
{
throw new NotSupportedException("unsupported colormap");
}
parser.Position += 404;
switch (storage)
{
case 0: ParseVerbatim(image, parser); break;
case 1: ParseRLE(image, parser); break;
default:
throw new InvalidDataException("invalid storage value");
}
return(image);
}
internal override short Int16(BinaryParser bp) => bp.Int16BE();
