Enum Cmd 

pub enum Cmd {
    FillRect {
        rect: Rect,
        color: Color,
        blend: BlendMode,
    },
    FillObb {
        obb: Obb,
        color: Color,
        blend: BlendMode,
    },
    FillDisc {
        center: PointF,
        radius: f32,
        color: Color,
        blend: BlendMode,
    },
    FillArc {
        center: PointF,
        r_outer: f32,
        r_inner: f32,
        start_cos: f32,
        start_sin: f32,
        end_cos: f32,
        end_sin: f32,
        extent: f32,
        color: Color,
        blend: BlendMode,
    },
    StrokeLine {
        a: PointF,
        b: PointF,
        width: f32,
        color: Color,
        blend: BlendMode,
    },
    DrawText {
        position: (i32, i32),
        text: String,
        color: Color,
    },
    DrawPixels {
        position: (i32, i32),
        pixels: Vec<Color>,
        width: u32,
        height: u32,
    },
    SetClip {
        rect: Option<Rect>,
    },
    Barrier,
}

A single drawing command. Z-order is list position in the CommandList that contains it.

Variants

FillRect

Filled axis-aligned rectangle.

Fields

rect: Rect

Rectangle bounds.

color: Color

Fill color.

blend: BlendMode

Composition mode.

FillObb

Anti-aliased filled oriented bounding box (rotated rectangle).

Fields

obb: Obb

Pre-computed OBB geometry.

color: Color

Fill color.

blend: BlendMode

Composition mode.

FillDisc

Anti-aliased filled disc (filled circle).

Fields

center: PointF

Sub-pixel center.

radius: f32

Radius in pixels.

color: Color

Fill color.

blend: BlendMode

Composition mode.

FillArc

Anti-aliased annular arc / pie slice. See crate::raster::rasterize_arc for the angle convention.

Fields

center: PointF

Sub-pixel center.

r_outer: f32

Outer radius in pixels.

r_inner: f32

Inner radius in pixels (0.0 for a pie slice).

start_cos: f32

Cosine of the start ray direction.

start_sin: f32

Sine of the start ray direction.

end_cos: f32

Cosine of the end ray direction.

end_sin: f32

Sine of the end ray direction.

extent: f32

Signed angular extent in radians.

color: Color

Fill color.

blend: BlendMode

Composition mode.

StrokeLine

Anti-aliased stroked line of given width (square caps).

Fields

a: PointF

Line start.

b: PointF

Line end.

width: f32

Line width in pixels.

color: Color

Stroke color.

blend: BlendMode

Composition mode.

DrawText

Text draw — owned String so the cmd can outlive the original borrow. See module docs for the alloc trade-off.

Fields

position: (i32, i32)

Anchor position (baseline origin).

text: String

UTF-8 text.

color: Color

Text color.

DrawPixels

Pixel-buffer blit — owned Vec<Color> for the same reason as Cmd::DrawText’s string.

Fields

position: (i32, i32)

Top-left destination position.

pixels: Vec<Color>

Source pixels, row-major.

width: u32

Source width in pixels.

height: u32

Source height in pixels.

SetClip

Clip stack marker. Some(rect) pushes a clip; None clears. Backends should bound subsequent draws to the active clip.

Fields

rect: Option<Rect>

Clip rectangle, or None to clear.

Barrier

Backend flush boundary (compositor swap, telemetry checkpoint). Optimizing backends may not reorder cmds across a Barrier.

Implementations

impl Cmd

pub fn dispatch_to<R: Renderer + ?Sized>(&self, r: &mut R)

Dispatch this cmd onto a Renderer, using the matching trait method for each variant. This is the default execution semantics — backends override CommandSink to specialize.

pub fn aabb(&self) -> Option<Rect>

AABB of pixels this command might write, in absolute framebuffer coords. Returns None for non-drawing markers (Barrier, SetClip).

Trait Implementations

impl Clone for Cmd

fn clone(&self) -> Cmd

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cmd

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

Formats the value using the given formatter.