fop-types

Foundational types for the Apache FOP Rust implementation. This crate has no internal dependencies and is used by all other FOP crates.

Types

Length

Dimensional measurements stored as integer millipoints (1/1000 of a typographic point) for precision without floating-point errors.

use fop_types::Length;

let a = Length::from_pt(72.0);    // 72 points
let b = Length::from_inch(1.0);   // 1 inch = 72 points
assert_eq!(a, b);

let c = Length::from_mm(210.0);   // A4 width
let d = Length::from_cm(21.0);    // Same thing
assert_eq!(c, d);

// Arithmetic
let sum = a + b;
let half = a / 2;

Color

RGBA color values with named color constants and hex parsing.

use fop_types::Color;

let red = Color::RED;
let custom = Color::from_hex("#FF8800").unwrap();
let transparent = Color::new(255, 0, 0, 128);

Point, Size, Rect

2D geometry types using Length for coordinates.

use fop_types::{Length, Point, Size, Rect};

let origin = Point::new(Length::from_pt(10.0), Length::from_pt(20.0));
let size = Size::new(Length::from_pt(100.0), Length::from_pt(50.0));
let rect = Rect::from_point_size(origin, size);

assert!(rect.contains(Point::new(Length::from_pt(50.0), Length::from_pt(30.0))));

FontMetrics / FontRegistry

Font measurement data for layout calculations. Provides character widths, ascent, descent, and line height for built-in fonts (Helvetica, Times-Roman).

use fop_types::FontRegistry;

let registry = FontRegistry::with_defaults();
let helvetica = registry.get("Helvetica").unwrap();
let width = helvetica.string_width("Hello", 12.0);

FopError / Result

Base error type used across all FOP crates.

Modules

Tests

25 unit tests covering:

• Length unit conversions (pt, mm, cm, inch) and arithmetic
• Color hex parsing, named colors, edge cases
• Geometry containment, intersection, size calculations
• Font metrics string width computation
• Error type Display/Debug

Dependencies

• thiserror 2.0