TPDFCompressionLevel Type

Selects the zlib effort level used when compressing streams while saving a document

Declaration

TPDFCompressionLevel= (clNone, clFastest, clDefault, clMaximum);

HPDFDoc

Value	Meaning
`clNone`	No content-stream compression; structural streams keep their default Flate form
`clFastest`	Maps to the fastest zlib effort level (`zcFastest`)
`clDefault`	Maps to the standard zlib effort level (`zcDefault`); the property default
`clMaximum`	Maps to the maximum zlib effort level (`zcMax`)

Assign through the CompressionLevel property of THotPDF; clDefault is the declared default
TPDFVersionManager.GetPreferredCompressionLevel derives a level from the document mode: dmLegacy yields clNone, dmStandard yields clFastest and dmEnhanced yields clMaximum
The xref stream always carries /Filter /FlateDecode regardless of the level, so opting out with clNone only affects content-stream compression