Module drawable 

Custom render command extension point for the wgpu backend.

Implement WgpuDrawable on types not covered by crate::default_drawables. Custom drawables receive a WgpuDrawContext with access to the frame’s geometry batch, text state, scissor region, depth ordering, and DPI scale.

Examples

use cotis_wgpu::drawable::{WgpuDrawable, WgpuDrawContext};
use cotis_wgpu::pipeline::{UIColor, UIPosition, UICornerRadii};

struct RedSquare;

impl WgpuDrawable for RedSquare {
    fn draw(self: Box<Self>, ctx: &mut WgpuDrawContext<'_>) {
        ctx.geometry.filled_rectangle(
            UIPosition { x: 10.0, y: 10.0, z: *ctx.depth },
            UIPosition { x: 100.0, y: 100.0, z: *ctx.depth },
            UIColor { r: 1.0, g: 0.0, b: 0.0 },
            UICornerRadii {
                top_left: 0.0,
                top_right: 0.0,
                bottom_left: 0.0,
                bottom_right: 0.0,
            },
        );
        *ctx.depth -= 0.000_1;
    }
}

Structs

WgpuDrawContext

Per-frame drawing context passed to each WgpuDrawable command.

Traits

WgpuDrawable

A render command that can be executed against the wgpu backend.