Struct Type3Metrics 

pub struct Type3Metrics {
    pub width: f32,
    pub bbox: Rect,
    pub painted: Rect,
    pub colored: bool,
    pub objects: Vec<PageObject>,
}

What a Type 3 glyph procedure declares about one character, and what it paints.

Fields

width: f32

The advance in glyph units, rounded as the C++ rounds it.

bbox: Rect

The bounding box in glyph units, after the font matrix.

This is what the glyph declares, and it is the right box for measurement. It is the wrong box for a buffer: d1’s operands are scaled by a thousand on the way in and put back through the font matrix on the way out, so a font whose /FontMatrix is not the conventional thousandth leaves the scale uncancelled and the box far off the page. Use Type3Metrics::painted to size anything.

painted: Rect

The extent the procedure’s objects actually cover, in glyph space.

The objects’ own union, with neither the thousandth scale nor the font matrix applied — CalcBoundingBox’s answer, and unaffected by an unconventional /FontMatrix because it never consults one.

colored: bool

Whether the procedure declared its own colour with d0 rather than only a width and box with d1.

This is the coloured/uncoloured distinction the renderer needs: a d1 glyph takes the text object’s colour for every drawing operation inside it, whatever colours the procedure sets, while a d0 one keeps whatever it sets and falls back to the text object’s only where it sets none.

objects: Vec<PageObject>

The objects the procedure paints, in glyph space — the procedure’s own coordinate system, before the font matrix.

A Type 3 glyph has no outline to cache: it is a content stream, and drawing it means walking these. Interpreting them here rather than at render time is what keeps the renderer free of the resolver, and it costs nothing extra — the metrics already had to open the stream.

Trait Implementations

impl Clone for Type3Metrics

fn clone(&self) -> Type3Metrics

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Type3Metrics

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Type3Metrics

fn eq(&self, other: &Type3Metrics) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Type3Metrics