Struct DrawList 

pub struct DrawList { /* private fields */ }

An ordered buffer of deferred draw commands recorded during a frame.

Scenes and components push DrawCommands into the list during on_render instead of drawing immediately. The engine then replays the whole list once per frame via CanvasRenderer::replay, which batches consecutive same-style shapes into a single path and skips redundant canvas state changes. The backing Vec is reused across frames via clear() to avoid reallocation.

Implementations

impl DrawList

Implements drawing and camera management methods for CanvasRenderer. Implements recording and replay for DrawList.

pub fn create() -> DrawList

Creates an empty draw list.

Returns

• DrawList - The new empty draw list.

pub fn is_empty(&self) -> bool

Returns whether the list contains no commands.

Returns

• bool - true if there are no recorded commands.

pub fn len(&self) -> usize

Returns the number of recorded commands.

Returns

• usize - The command count.

pub fn clear(&mut self)

Removes all recorded commands, keeping the allocated capacity for reuse on the next frame.

pub fn fill_rect( &mut self, position: Vector2D, width: f64, height: f64, color: Color, )

Records a fill-rectangle command.

pub fn stroke_rect( &mut self, position: Vector2D, width: f64, height: f64, color: Color, line_width: f64, )

Records a stroke-rectangle command.

pub fn fill_circle(&mut self, center: Vector2D, radius: f64, color: Color)

Records a fill-circle command.

pub fn stroke_circle( &mut self, center: Vector2D, radius: f64, color: Color, line_width: f64, )

Records a stroke-circle command.

pub fn draw_line( &mut self, start: Vector2D, end: Vector2D, color: Color, line_width: f64, )

Records a line-segment command.

pub fn fill_text<T, F>( &mut self, text: T, position: Vector2D, color: Color, font: F, )

where T: AsRef<str>, F: AsRef<str>,

Records a fill-text command.

pub fn draw_sprite( &mut self, image: &HtmlImageElement, source: Rect, transform: Transform2D, )

Records a transformed sprite draw command.

pub fn draw_image_rect( &mut self, image: &HtmlImageElement, source: Rect, dest_position: Vector2D, dest_width: f64, dest_height: f64, )

Records an image sub-region draw command (no rotation).

pub fn set_global_alpha(&mut self, alpha: f64)

Records a global-alpha state change.

pub fn set_blend_mode(&mut self, mode: BlendMode)

Records a blend-mode state change.

impl DrawList

pub fn new(commands: Vec<DrawCommand>) -> Self

Trait Implementations

impl Clone for DrawList

fn clone(&self) -> DrawList

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DrawList

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

Formats the value using the given formatter.

impl Default for DrawList

fn default() -> DrawList

Returns the “default value” for a type.