public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (CbgMetaData)info as CbgMetaData;
using (var reader = new CbgReader(stream.AsStream, meta))
{
reader.Unpack();
return(ImageData.Create(meta, reader.Format, null, reader.Data, reader.Stride));
}
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as CbgMetaData;
if (null == meta)
{
throw new ArgumentException("CompressedBGFormat.Read should be supplied with CbgMetaData", "info");
}
using (var reader = new CbgReader(stream, meta))
{
reader.Unpack();
return(ImageData.Create(meta, reader.Format, null, reader.Data, reader.Stride));
}
}
public void UnpackBlock(int offset, int length, int dst)
{
using (var input = new MemoryStream(this.Input, offset, length))
using (var reader = new MsbBitStream(input))
{
int block_size = CbgReader.ReadInteger(input);
if (-1 == block_size)
{
return;
}
var color_data = new short[block_size];
int acc = 0;
for (int i = 0; i < block_size && input.Position < input.Length; i += 64)
{
int count = Tree1.DecodeToken(reader);
if (count != 0)
{
int v = reader.GetBits(count);
if (0 == (v >> (count - 1)))
{
v = (-1 << count | v) + 1;
}
acc += v;
}
color_data[i] = (short)acc;
}
if (0 != (reader.CacheSize & 7))
{
reader.GetBits(reader.CacheSize & 7);
}
for (int i = 0; i < block_size && input.Position < input.Length; i += 64)
{
int index = 1;
while (index < 64 && input.Position < input.Length)
{
int code = Tree2.DecodeToken(reader);
if (0 == code)
{
break;
}
if (0xF == code)
{
index += 0x10;
continue;
}
index += code & 0xF;
if (index >= block_fill_order.Length)
{
break;
}
code >>= 4;
int v = reader.GetBits(code);
if (code != 0 && 0 == (v >> (code - 1)))
{
v = (-1 << code | v) + 1;
}
color_data[i + block_fill_order[index]] = (short)v;
++index;
}
}
if (8 == BPP)
{
DecodeGrayscale(color_data, dst);
}
else
{
DecodeRGB(color_data, dst);
}
}
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as CbgMetaData;
if (null == meta)
throw new ArgumentException ("CompressedBGFormat.Read should be supplied with CbgMetaData", "info");
using (var reader = new CbgReader (stream, meta))
{
reader.Unpack();
return ImageData.Create (meta, reader.Format, null, reader.Data, reader.Stride);
}
}
