Is Deflate filter compression level -1 (default) supported?

I try to write deflate filtered datasets and would like to support the following 4 compression levels in my default deflate filter algorithm: Compression ratios for different zlib compression levels - Stack Overflow

The filter parameters are represented as uint32[] array so the default value (-1) needs to be casted to uint32 which results in the hex value 0xFFFFFFFF which is no being accepted in the deflate filter function:


If that value would be accepted, I could choose -1 as the default compression level if the user does not specify anything else. Since that does not work, I will for now select some sensible default like 6. But it would be great, if -1 is also being accepted in the future.

Thanks :slight_smile: