Struct CellGeometry 

pub struct CellGeometry {
    pub glyph_w: u8,
    pub glyph_h: u8,
    pub scale: u16,
}

The pixel geometry of a fixed cell grid: a glyph size and an integer scale.

Presenter::cell_size’s contract (physical pixels, glyph x scale, never DPI-auto-scaled) had no code embodiment: each graphical backend re-derived glyph_w * scale (and cols * cell_w for the surface) on its own, in slightly different integer types, so the shared rule could drift. This is that rule as one small, const, testable value type. A backend stores one and returns cell_size from Presenter::cell_size.

Fields

glyph_w: u8

Glyph width in unscaled font pixels.

glyph_h: u8

Glyph height in unscaled font pixels.

scale: u16

Integer pixel scale: each glyph pixel becomes a scale x scale block of physical pixels.

Implementations

impl CellGeometry

pub const fn new(glyph_w: u8, glyph_h: u8, scale: u16) -> Self

A geometry for glyph_w x glyph_h glyphs drawn at integer scale.

pub const fn cell_size(&self) -> (u32, u32)

Cell size in physical pixels: (glyph_w * scale, glyph_h * scale).

The single embodiment of Presenter::cell_size’s “physical pixels, glyph x scale” contract.

pub const fn surface_size(&self, cols: u16, rows: u16) -> (u32, u32)

Surface size in physical pixels for a cols x rows grid: (cols * cell_w, rows * cell_h).

Trait Implementations

impl Clone for CellGeometry

fn clone(&self) -> CellGeometry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CellGeometry

impl Debug for CellGeometry

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

Formats the value using the given formatter.

impl Eq for CellGeometry

impl PartialEq for CellGeometry

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CellGeometry