`pdfSetUseObjectStreams`

Emit the document with PDF 1.5 object streams and a

Purpose — Emit the document with PDF 1.5 object streams and a cross-reference stream instead of a classic xref table.

Description — When enabled, pdfCloseFile serializes normally and then repacks eligible non-stream objects into /ObjStm compressed object streams with an /XRef stream trailer — a noticeably smaller file for dictionary-heavy documents. Set it any time before close. Readers must support PDF 1.5+ (all modern viewers do).

BOOL32 __stdcall pdfSetUseObjectStreams(PPDF IPDF, BOOL32 Value);

Return value — TRUE unless the instance handle is invalid.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

Import & Output APIs