SaveAsObjectStream - TPdf - PDFium Delphi Component

Komponen: TPdf · Unit: PDFium

Menulis salinan PDF 1.5+ yang ringkas menggunakan object stream terbatas dan xref stream lengkap

Syntax

function SaveAsObjectStream(Stream: TStream; Option: TSaveOption = saNone; PdfVersion: TPdfVersion = pvUnknown; MaxObjectsPerStream: Integer = 100; MaxDecodedBytesPerStream: Integer = 65536): Boolean;

function SaveAsObjectStream(const FileName: string; Option: TSaveOption = saNone; PdfVersion: TPdfVersion = pvUnknown; MaxObjectsPerStream: Integer = 100; MaxDecodedBytesPerStream: Integer = 65536): Boolean;

Stream	TStream that receives the complete object-stream PDF
FileName	Output path replaced only after a sibling temporary file succeeds
Option	Normal save option or `saRemoveSecurity`; `saIncremental` is rejected
PdfVersion	Output version from PDF 1.5 upward, or `pvUnknown` to preserve or upgrade the current version
MaxObjectsPerStream	Maximum object members per ObjStm group; the default is 100
MaxDecodedBytesPerStream	Maximum decoded member payload per group; the default is 65536 bytes

Return Value

Returns True when the object-stream output was completed successfully

Description

Metode pertama-tama memakai jalur penyimpanan PDFium normal sebagai sumber semantik, lalu meresolusi revisi classic, hybrid, atau xref-stream aktif

Anggota object-stream yang ada dimaterialisasikan sebelum referensi dinomori ulang ke urutan lokal halaman

Objek non-stream yang memenuhi syarat dikelompokkan berdasarkan jumlah anggota dan ukuran payload terdekode, lalu dikompres Flate hanya ketika kompresi mengurangi grup

Katalog, objek stream, kamus tanda tangan, panjang stream tidak langsung, dan nilai berukuran besar tetap dapat dialamatkan langsung

Xref stream murni memakai lebar field adaptif dan entri tipe-2 untuk setiap anggota terkompresi

Constraints

Object-stream packing is a full rewrite, so saIncremental is not supported and existing digital signatures become invalid
Encrypted input requires saRemoveSecurity because object renumbering changes object-level encryption keys
Explicit versions below PDF 1.5 are rejected because object and xref streams were introduced in PDF 1.5
Both grouping limits must be greater than zero
The current memory-backed writer rejects input of 2 GiB or larger

Example

// Seimbangkan output ringkas dengan dekompresi akses acak terbatas
Pdf.SaveAsObjectStream('report-compact.pdf', saNoIncremental, pv17, 100, 65536);

SaveAsObjectStream metode