playcanvas/build/playcanvas/src/framework/handlers/render.js

PlayCanvas WebGL game engine

import { Render } from '../../scene/render.js';
import { ResourceHandler } from './handler.js';

function onContainerAssetLoaded(containerAsset) {
		const renderAsset = this;
		if (!renderAsset.resource) return;
		const containerResource = containerAsset.resource;
		const render = containerResource.renders && containerResource.renders[renderAsset.data.renderIndex];
		if (render) {
				renderAsset.resource.meshes = render.resource.meshes;
		}
}
function onContainerAssetAdded(containerAsset) {
		const renderAsset = this;
		renderAsset.registry.off(`load:${containerAsset.id}`, onContainerAssetLoaded, renderAsset);
		renderAsset.registry.on(`load:${containerAsset.id}`, onContainerAssetLoaded, renderAsset);
		renderAsset.registry.off(`remove:${containerAsset.id}`, onContainerAssetRemoved, renderAsset);
		renderAsset.registry.once(`remove:${containerAsset.id}`, onContainerAssetRemoved, renderAsset);
		if (!containerAsset.resource) {
				renderAsset.registry.load(containerAsset);
		} else {
				onContainerAssetLoaded.call(renderAsset, containerAsset);
		}
}
function onContainerAssetRemoved(containerAsset) {
		const renderAsset = this;
		renderAsset.registry.off(`load:${containerAsset.id}`, onContainerAssetLoaded, renderAsset);
		if (renderAsset.resource) {
				renderAsset.resource.destroy();
		}
}
class RenderHandler extends ResourceHandler {
		constructor(app){
				super(app, 'render');
				this._registry = app.assets;
		}
		open(url, data) {
				return new Render();
		}
		patch(asset, registry) {
				if (!asset.data.containerAsset) {
						return;
				}
				const containerAsset = registry.get(asset.data.containerAsset);
				if (!containerAsset) {
						registry.once(`add:${asset.data.containerAsset}`, onContainerAssetAdded, asset);
						return;
				}
				onContainerAssetAdded.call(asset, containerAsset);
		}
}

export { RenderHandler };