bevy_fast_light 0.10.0

Simple 2D lighting for Bevy focused on performance over features.
Documentation 
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/*
 * Heavily inspired by:
 * - https://bevy.org/examples/shaders/custom-post-processing/
 */

//! [`Plugin`] for rendering light map from [`MeshLightTextures`](crate::light::prelude::MeshLightTextures) to the screen texture.

use bevy::{
    app::{App, Plugin},
    asset::embedded_asset,
    core_pipeline::core_2d::graph::Core2d,
    render::{
        RenderApp, RenderStartup,
        extract_component::UniformComponentPlugin,
        render_graph::{RenderGraphExt, RenderLabel, ViewNodeRunner},
    },
};

use crate::{composite::prelude::*, extract::prelude::*};

/// [`Plugin`] for rendering light map from [`MeshLightTextures`](crate::light::prelude::MeshLightTextures) to the screen texture.
pub(crate) struct CompositePlugin;
impl Plugin for CompositePlugin {
    fn build(&self, app: &mut App) {
        embedded_asset!(app, "composite.wgsl");

        app.add_plugins(UniformComponentPlugin::<ExtractedAmbientLight2d>::default());

        let Some(render_app) = app.get_sub_app_mut(RenderApp) else {
            return;
        };

        render_app.add_systems(RenderStartup, super::pipeline::init_composite_pipeline);

        render_app.add_render_graph_node::<ViewNodeRunner<CompositeNode>>(Core2d, CompositeLabel);
    }
}

/// Label for render graph edges for [`CompositeNode`].
#[derive(Debug, Hash, PartialEq, Eq, Clone, RenderLabel)]
pub(crate) struct CompositeLabel;