Labels

Public API (pkg/)

Command-line interface

High-level PDF creation API

Stream encoding (Flate, DCT)

Text, image, graphics extraction

Standard 14 + TTF/OTF + Unicode

PDF parsing (xref, objects, streams)

PDF document reading

RC4/AES encryption

4-Pass Hybrid table detection

PDF generation

Large: cross-cutting or breaking; usually split

Medium: several areas or a public API addition

Small: local change, one area

AcroForm creation/filling/flattening

JPEG/PNG embedding and extraction

PDF merge/split operations

Digital signatures

Table extraction (740/740 accuracy)

Text rendering and extraction

Unicode font support (Cyrillic, CJK)

Good for newcomers

Extra attention is wanted

Breaks importers or users: needs a major (or minor under v1)

A maintainer will guide the work

PDF 1.4 compatibility

PDF 1.7 (ISO 32000-1)

PDF 2.0 (ISO 32000-2)

Linux-specific

macOS-specific