Struct BitmapFont 

pub struct BitmapFont {
    pub width: u8,
    pub height: u8,
    pub advance: u8,
    pub line_height: u8,
    pub first_char: u8,
    pub bytes_per_row: u8,
    pub glyphs: &'static [u8],
}

Flexible monospaced or packed raw bitmap font definition.

Unlike PackedFont (which is fixed to 3x5 5-row bitpacks), BitmapFont supports arbitrary glyph dimensions (e.g., 8x8, 8x16, 12x16, 16x24), configurable advance/line-height, and multi-byte row bit-masks.

Fields

width: u8

Bounding box width in pixels.

height: u8

Bounding box height in pixels.

advance: u8

Character horizontal advance in pixels.

line_height: u8

Vertical line height in pixels.

first_char: u8

The ASCII character code of the first glyph in the buffer (usually 32 / space).

bytes_per_row: u8

Number of bytes per row for each glyph (e.g. 1 byte for width <= 8, 2 bytes for width <= 16).

glyphs: &'static [u8]

Contiguous byte slice containing glyph bitmaps stored row by row (MSB left-to-right).

Implementations

impl BitmapFont

pub const fn new_8x8( first_char: u8, advance: u8, line_height: u8, glyphs: &'static [u8], ) -> Self

Creates a new BitmapFont for standard 8x8 glyphs (1 byte per row, 8 rows per glyph).

pub const fn new_8x16( first_char: u8, advance: u8, line_height: u8, glyphs: &'static [u8], ) -> Self

Creates a new BitmapFont for standard 8x16 glyphs (1 byte per row, 16 rows per glyph).

pub fn glyph_bytes(&self, ch: char) -> Option<&'static [u8]>

Get the raw byte slice for a character’s row data.

pub fn draw_glyph_to<F>(&self, ch: char, emit: F)

where F: FnMut(GlyphOp),

Renders a glyph by emitting GlyphOp commands to a single closure callback.

Trait Implementations

impl Clone for BitmapFont

fn clone(&self) -> BitmapFont

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BitmapFont

impl Debug for BitmapFont

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

Formats the value using the given formatter.

impl Eq for BitmapFont

impl Font for BitmapFont

fn advance(&self) -> u32

Character horizontal advance in pixels.

fn line_height(&self) -> u32

Vertical line height in pixels.

fn draw_glyph(&self, ch: char, draw_pixel: &mut dyn FnMut(i32, i32))

Render a single glyph by calling draw_pixel(dx, dy) for each active pixel in the glyph, where (dx, dy) are relative coordinates within the glyph bounding box.

impl From<&'static BitmapFont> for FontId

fn from(font: &'static BitmapFont) -> Self

Converts to this type from the input type.

impl PartialEq for BitmapFont

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BitmapFont