Module pdf 

PDF loading layer — document loading, text extraction, line extraction.

Modules

annotation_enrichment

Annotation enrichment — post-processing for extracted annotations.

annotation_extractor

PDF annotation extraction.

bookmark_extractor

PDF bookmark/outline extraction.

chunk_parser

Unified PDF content stream parser — matches the reference ChunkParser architecture.

encryption

PDF encryption detection and password-based loading.

font

PDF font handling — font resolution, glyph widths, and Unicode mapping.

font_style

Shared font name / weight helpers (DRY across Type1 / Type3 / TrueType).

font_type3

Type 3 font metric normalization.

font_type3_ocr

Type 3 CharProc → Unicode OCR cache (requires image). Type 3 CharProc → Unicode cache (appearance-only fonts).

form_extractor

AcroForm field extraction from PDF documents.

graphics_state

PDF graphics state tracking.

hyperlink_extractor

Hyperlink extraction from PDF link annotations.

image_codecs

Image XObject codecs (DCT / Flate / JBIG2 / JPX) for the OCR path. Image XObject codec decode for the OCR path.

image_extractor

PDF image extraction — find and extract inline/XObject images.

image_region

Cheap image-region classifier + OCR budget (native + WASM). Image-region classification for OCR routing (SRP / Strategy).

inmem_raster

In-memory Image-XObject → table lattice (WASM-safe; no pdfimages). In-memory raster table recovery (WASM-safe).

line_extractor

PDF line segment extraction — extract stroked/filled paths as LineChunks.

loader

PDF document loading via lopdf.

metadata_writer

PDF metadata writer — update document metadata (title, author, etc.) in a lopdf Document before saving.

ocg

Optional Content Group default visibility. Optional Content Groups (OCG) — default visibility from the catalog.

ocr

Pluggable raster OCR engines (Tesseract CLI / ocrs). Pluggable raster OCR engines for table recovery.

page_info

Page geometry extraction — MediaBox, CropBox, Rotation.

pdf_string

Decode PDF string objects (ISO 32000-1 §7.9.2).

raster_table_ocr

Recover text signal from raster table images using local OCR.

text_extractor

Text extraction from PDF content streams.