Trait Font 

pub trait Font {
    // Required method
    unsafe fn as_bytes(&self) -> &[u8];

    // Provided methods
    fn is_ascii(&self) -> bool { ... }
    fn line_width_ascii(&self, t: &str) -> u32 { ... }
    fn line_width_utf8(&self, t: &str) -> u32 { ... }
    fn char_width(&self) -> u8 { ... }
    fn char_height(&self) -> u8 { ... }
    fn baseline(&self) -> u8 { ... }
}

A loaded font file.

Required Methods

unsafe fn as_bytes(&self) -> &[u8]

Get the raw font file representation.

Safety

Don’t use it. The internal font representation might change in the future and so should not be relied upon.

Provided Methods

fn is_ascii(&self) -> bool

Check if the font encoding is ASCII.

fn line_width_ascii(&self, t: &str) -> u32

Calculate width (in pixels) of the given ASCII text.

This function does not account for newlines.

fn line_width_utf8(&self, t: &str) -> u32

Calculate width (in pixels) of the given UTF-8 text.

This function does not account for newlines.

fn char_width(&self) -> u8

The width (in pixels) of one glyph bounding box.

fn char_height(&self) -> u8

The height (in pixels) of one glyph (one line) bounding box.

fn baseline(&self) -> u8

Offset from the top of the glyph bounding box to the baseline.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Font for FontBuf

Available on crate feature alloc only.

impl Font for FontRef<'_>