pdfrum-type1

Type 1 font programs (ISO 32000-1 §9.6.2): PFA and PFB containers, the eexec and charstring encryptions, the Type 1 charstring interpreter, and Multiple Master interpolation. This crate exists because Fontations does not read the format — CFF and TrueType stay in skrifa, and only the one format nothing else handles lands here.

use pdfrum_common::{Diagnostics, Limits};
use pdfrum_type1::Type1Font;

# fn demo(pfb: &[u8]) -> Option<()> {
let font = Type1Font::parse(pfb, &Limits::default(), &mut Diagnostics::default()).ok()?;
let gid = font.name_to_gid("A")?;
let (outline, advance) = font.outline(gid)?;
let _ = (font.units_per_em(), font.font_matrix(), outline, advance);
# Some(())
# }

A Type 1 font is name-addressed, not index-addressed: its charstrings are a dictionary keyed by glyph name, and the /Encoding array maps a byte to a name rather than to a glyph number. [Gid] here is this crate's own stable numbering over that dictionary, so [Type1Font::code_to_gid], [Type1Font::name_to_gid] and [Type1Font::unicode_to_gid] are three routes into one space — and [Type1Font::glyph_name] goes back, which is what makes a /Differences encoding resolvable at all.

Outlines are in font units, 1000 per em by convention but read from the /FontMatrix rather than assumed ([Type1Font::units_per_em], [Type1Font::font_matrix]). Multiple Master fonts are not interpolated on parse: [Type1Font::mm_axes] reports the design axes and [Type1Font::instantiate] borrows an instance at a coordinate, so one parsed font serves every weight a document asks for.

Part of pdfrum. #![forbid(unsafe_code)].

MIT OR Apache-2.0