Struct Renderer 

pub struct Renderer { /* private fields */ }

Draws windows. One serves every window; it holds the glyph and icon caches.

Implementations

impl Renderer

pub fn new() -> Renderer

A renderer with empty caches, looking icons up in the hicolor theme.

pub fn set_icon_theme(&mut self, theme: impl Into<String>)

Sets the icon theme names are looked up in.

pub fn draw( &mut self, view: &WindowView<'_>, damage: &[Rect], text: &mut TextSystem, history: &mut DamageHistory, canvas: Canvas<'_>, ) -> Result<Vec<PixelRect>, CanvasError>

Draws the laid-out window view into canvas and returns the areas to report with wl_surface.damage_buffer.

damage is what the window reported since the last draw, from Window::take_damage. The draw repaints that, plus what changed in frames this buffer missed according to history, or the whole buffer when that is more than half of it or the buffer is new. Text and glyphs come from text.

Commit the buffer after every successful draw, in order: the history counts each one as a frame the compositor showed.

Errors

If canvas holds the wrong number of bytes for its size, or its scale isn’t a positive number. Nothing is drawn and the history doesn’t advance.

Trait Implementations

impl Default for Renderer

fn default() -> Self

Returns the “default value” for a type.