a39482f622
Implemented compute_glyph_advance and compute_device_bbox functions for Phase 3 text processing with Tc/Tw/Tz corrections per ISO 32000-1 sec 9.2.4. - compute_glyph_advance: Returns per-glyph text-space advance width incorporating Tc (char_spacing), Tw (word_spacing only for 0x20 in simple fonts), and Tz (horiz_scaling) - compute_device_bbox: Maps glyph's font-unit bbox to PDF user space via text_matrix * CTM transformation with text rise (Ts) offset - Font metrics dispatch: Std14 fonts use hardcoded widths, Type1/TrueType use /Widths array, Type0 use CID -> width (placeholder), Type3 use /Widths array - is_simple_font helper: Identifies Type1/TrueType/MMType1 for Tw application Passing acceptance criteria tests: - 12pt Helvetica 'H' advance = 8.664 (722/1000 * 12) - Tc 1 Tw 5 Tz 100 space advance = 9.336 ((278/1000 * 12) + 1 + 5) - Tz 50 halves advance, font_size 0 returns 0 (no panic) - is_simple_font correctly identifies Type1/TrueType, excludes Type0 Closes: pdftract-2q6sg
106 lines
3.2 KiB
Rust
106 lines
3.2 KiB
Rust
//! pdftract-core — Core PDF parsing and text extraction primitives.
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//!
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//! This crate provides the foundational data structures and parsers for
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//! processing PDF documents, including the lexer, object parser, and
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//! text extraction engines.
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pub mod annotation;
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pub mod atomic_file_writer;
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pub mod attachment;
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pub mod audit;
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pub mod cache;
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pub mod classify;
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pub mod confidence;
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pub mod content_stream;
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pub mod diagnostics;
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pub mod document;
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#[cfg(feature = "ocr")]
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pub mod dpi;
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#[cfg(feature = "decrypt")]
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pub mod encryption;
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pub mod extract;
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pub mod fingerprint;
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pub mod font;
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pub mod forms;
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pub mod glyph;
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pub mod graphics_state;
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#[cfg(feature = "ocr")]
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pub mod hybrid;
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pub mod javascript;
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pub mod layout;
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pub mod markdown;
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#[cfg(feature = "ocr")]
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pub mod ocr;
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pub mod options;
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pub mod output;
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pub mod page_class;
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pub mod parser;
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#[cfg(feature = "ocr")]
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pub mod preprocess;
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#[cfg(feature = "profiles")]
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pub mod profiles;
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pub mod receipts;
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#[cfg(feature = "ocr")]
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pub mod render;
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pub mod text;
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#[cfg(feature = "remote")]
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pub mod url_validation;
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pub mod word_boundary;
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// Re-export has_full_render for runtime feature detection
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#[cfg(all(feature = "ocr", feature = "full-render"))]
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pub use render::pdfium_path::has_full_render;
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pub mod schema;
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pub mod semaphore;
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pub mod signature;
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pub mod span_flags;
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pub mod table;
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pub mod threads;
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// Re-export key types for convenience
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pub use confidence::ConfidenceSource;
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pub use document::{PageExtraction, PageIter, PdfExtractor};
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pub use extract::{
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extract_pdf, extract_pdf_ndjson, extract_pdf_streaming, ExtractionMetadata, ExtractionResult,
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PageResult,
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};
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pub use font::std14::{get_std14_metrics, NamedEncoding, Std14Metrics};
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pub use forms::{
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combine, walk_acroform_fields, AcroFieldType, AcroFormField, ChoiceValue, FormFieldValue,
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};
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pub use markdown::{
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block_to_markdown, form_fields_to_markdown, page_to_markdown, parse_anchors, span_to_markdown,
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Anchor,
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};
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pub use options::{ExtractionOptions, ReceiptsMode};
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pub use page_class::{page_type_string, PageClass, PageClassification};
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pub use parser::pages::{count_pages_tree, LazyPageIter, PageDict, DEFAULT_MEDIABOX};
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pub use schema::{
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AttachmentJson, BeadJson, BlockJson, CellJson, ExtractionQuality, RowJson, SpanJson, SpanRef,
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TableJson, ThreadJson,
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};
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pub use table::{GridCandidate, PageContext as TablePageContext, TableDetector};
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pub use text::{serialize_page_text, TextOptions};
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#[cfg(feature = "ocr")]
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pub use dpi::{select_dpi, FontSizeSpan, Pdf1Filter};
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#[cfg(feature = "ocr")]
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pub use hybrid::{
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compute_cell_crops, compute_iou, crop_cell_from_page, get_hybrid_cells,
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merge_vector_and_ocr_spans, CellCrop, Span, SpanSource,
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};
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#[cfg(feature = "ocr")]
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pub use ocr::preprocessing::{
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histogram_stretch, histogram_stretch_if_needed, otsu_binarize, PreprocError,
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};
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#[cfg(feature = "ocr")]
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pub use ocr::{
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borrow_or_init, calculate_wer, detect_available_languages, init_count, parse_hocr,
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reset_init_count, run_tesseract, run_tesseract_on_cell, validate_ocr_languages, HocrWord,
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TessOpts,
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};
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#[cfg(feature = "ocr")]
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pub use preprocess::{
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add_border_padding, binarize_otsu, binarize_sauvola, denoise_median, deskew,
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normalize_contrast, preprocess, ImageSource,
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};
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