// ImmutableBySpec returns an Immutable ROI (or nil if not available) given
// a name and uuid using string format "<roiname>,<uuid>"
func ImmutableBySpec(spec string) (*Immutable, error) {
d, v, found, err := DataBySpec(spec)
if err != nil {
return nil, err
}
if !found {
return nil, nil
}
// Read the ROI from this version.
spans, err := d.GetSpans(v)
if err != nil {
return nil, err
}
// Setup the immutable.
im := Immutable{
version: v,
blockSize: d.BlockSize,
blocks: make(map[dvid.IZYXString]struct{}),
}
for _, span := range spans {
z, y, x0, x1 := span[0], span[1], span[2], span[3]
for x := x0; x <= x1; x++ {
c := dvid.ChunkPoint3d{x, y, z}
izyx := c.ToIZYXString()
im.blocks[izyx] = struct{}{}
}
}
return &im, nil
}
