Per-character geometry: transformation matrix, rotation angle, font weight

Wraps FPDFText_GetMatrix, FPDFText_GetCharAngle, and FPDFText_GetFontWeight. Returns a tibble with one row per character on page (matching the row count of pdf_text_chars()).

Usage

pdf_text_char_geometry(page)

Arguments

page

A pdfium_page from pdf_page_load().

Value

A tibble with columns char_index, matrix, angle_deg, font_weight. The matrix column is stored as a list-column of length-6 numeric vectors so the tibble round-trips through dplyr cleanly.

Details

The matrix column is a 6-column numeric matrix where row i holds the (a, b, c, d, e, f) 2D affine matrix for character i (1-indexed). angle_deg is the rotation in degrees; font_weight is PDFium's CSS-style weight integer (e.g. 400 = regular, 700 = bold), NA_integer_ if PDFium can't determine it.

See also

pdf_text_chars() for the broader per-character tibble.