Struct PixelsRenderer 

pub struct PixelsRenderer { /* private fields */ }

Implementations

impl PixelsRenderer

pub fn new() -> Self

pub fn with_fonts(fonts: &[&'static [u8]]) -> Self

A renderer that draws text in fonts. With none that parses, it uses the embedded default font when the embedded-default-font feature is on, and draws no text otherwise.

pub fn draw(&self, frame: &mut [u8], width: u32, height: u32)

pub fn draw_scaled(&self, frame: &mut [u8], width: u32, height: u32, scale: f32)

Rasterizes logical scene coordinates at scale device pixels per point. Hit regions stay in logical coordinates. Invalid scales use 1.0.

pub fn update_picture( &self, picture: &mut Picture, width: u32, height: u32, scale: f32, changed: &mut Vec<PixelRect>, )

Moves picture to the current scene, drawn width by height device pixels at scale device pixels per point, and puts into changed the areas whose pixels differ from the picture it held: the whole frame the first time and after a change of size or scale. Invalid scales use 1.0.

pub fn draw_picture_area( &self, picture: &Picture, area: PixelRect, pixels: &mut [u8], )

Draws area of picture into pixels as straight-alpha RGBA8 rows of area.width pixels, area.height of them. Draws nothing before the first Self::update_picture or when pixels is shorter than the area.

impl PixelsRenderer

pub fn compose_sprites( &self, frame: &mut SpriteFrame, width: u32, height: u32, scale: f32, )

The scene at scale device pixels per point as sprites for a GPU compositor, into frame, which keeps its textures from the frames before. Invalid scales use 1.0.

Trait Implementations

impl Default for PixelsRenderer

fn default() -> Self

Returns the “default value” for a type.

impl Renderer for PixelsRenderer

type Scene = Scene

type Error = PixelsRendererError

fn attach_app_context_services(&mut self, app_context: &AppContext)

Installs renderer-provided app services into the target AppContext.

fn apply_installed_fonts(&mut self, app_context: &AppContext)

Takes in the fonts installed since the renderer last looked (see installed_fonts::install_font_file). A renderer that installed the app’s text measurer installs one with the new faces, so text lays out again with them.

fn scene(&self) -> &Self::Scene

fn scene_mut(&mut self) -> &mut Self::Scene

fn rebuild_scene( &mut self, layout_tree: &LayoutTree, _viewport: Size, ) -> Result<(), Self::Error>

fn rebuild_scene_from_applier( &mut self, applier: &mut MemoryApplier, root: NodeId, _viewport: Size, ) -> Result<(), Self::Error>

Rebuilds the scene by traversing the LayoutNode tree directly via Applier.

fn update_scene_from_applier( &mut self, applier: &mut MemoryApplier, root: NodeId, _viewport: Size, updates: SceneUpdates<'_>, ) -> Result<(), Self::Error>

fn update_visual_scene_from_applier( &mut self, applier: &mut MemoryApplier, root: NodeId, _viewport: Size, updates: SceneUpdates<'_>, ) -> Result<(), Self::Error>

fn set_root_scale(&mut self, _scale: f32)

Sets how many device pixels the renderer draws for one logical unit.

fn draw_dev_overlay(&mut self, _text: &str, _viewport: Size)

Draw a development overlay (e.g., FPS counter) on top of the scene.

fn set_inspector_overlay(&mut self, _graph: Option<RenderGraph>)

Replaces the developer inspector graph outside the application scene.

fn needs_frame_warmup(&self) -> bool

Returns whether renderer-side cache materialization needs a visible follow-up frame.

fn awaits_pipelines(&self) -> bool

Returns whether the last frame drew a placeholder for an effect whose pipelines are still compiling, so its picture is not final yet; the renderer asks for the frame that replaces it once they land.