refactor getindex() for LazyBufferedTIFF

src/types/lazy.jl

@@ -115,23 +115,21 @@ offset(::LazyBufferedTIFF{T, O, AA}) where {T, O, AA} = O
 function Base.getindex(A::LazyBufferedTIFF{T, O, AA}, i1::Int, i2::Int, i::Int) where {T, O, AA}
  (size(A) == (0, 0, 0)) && error("This image has not been initialized, please `push!` data into it first")
  # check the loaded cache is already the correct slice
- if A.cache_index == i
- return A.cache[i1, i2]
- end
-
- ifd = ifds(A)[i]
+ if A.cache_index != i
+ ifd = ifds(A)[i]
 
- # if the file isn't open, lets open a handle and update it
- if !isopen(A.file.io)
- path = A.file.filepath
- A.file.io = getstream(format"TIFF", open(path), path)
- end
+  # if the file isn't open, lets open a handle and update it
+  if !isopen(A.file.io)
+  path = A.file.filepath
+  A.file.io = getstream(format"TIFF", open(path), path)
+  end
 
- read!(A.cache, A.file, ifd)
+  read!(A.cache, A.file, ifd)
 
- A.cache = Matrix(transform(A.cache, ifd))
+  A.cache = transform(A.cache, ifd)
 
- A.cache_index = i
+ A.cache_index = i
+ end
 
  return A.cache[i1, i2]
 end