Struct Renderer 

pub struct Renderer { /* private fields */ }

The fonts and text layout state a renderer keeps between paints.

Implementations

impl Renderer

pub fn new() -> Renderer

pub fn layout(&mut self, scene: &Scene) -> Vec<Frame>

Lays the scene out: every node’s box, in tree order.

pub fn display_list(&mut self, scene: &Scene) -> (Frame, Vec<Draw>)

The scene as drawing commands — laid out once, shaped once — and the area they cover: the design’s drawing, its root’s box plus anything painted outside it, in whole pixels. The list is clipped to that area, so every backend shows exactly it.

pub fn drawing( &mut self, scene: &Scene, after: Option<&Drawing>, ) -> Result<Drawing, Undrawable>

The scene laid out once and turned into its display list, or why it can’t be drawn: a drawing bigger than MAX_SIDE a side, or images and shadows that don’t fit the GPU’s atlas together. What the PNG, the canvas and devpage check all start from.

Each image is painted under a blob of its own, made in the order the drawing first paints it — except that a drawing made after the one a canvas last showed, painting the same images in the same order, paints that drawing’s: the GPU then keeps the atlas it has, which holds exactly them, placed as a fresh one would.

pub fn paint(&mut self, scene: &Scene, scale: f32) -> Pixmap

Paints the scene’s drawing with vello_cpu at scale device pixels per scene pixel, its top-left at the drawing’s. A drawing bigger than MAX_SIDE a side is painted only that far.

Trait Implementations

impl Default for Renderer

fn default() -> Self

Returns the “default value” for a type.