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

PlayCanvas WebGL game engine

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

/**
 * @import { AppBase } from '../app-base.js'
 */ // The scope of this function is the render asset
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;
    }
}
// The scope of this function is the render asset
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:${containerAsset.id}`, onContainerAssetLoaded, renderAsset);
    if (renderAsset.resource) {
        renderAsset.resource.destroy();
    }
}
/**
 * Resource handler used for loading {@link Render} resources.
 *
 * @category Graphics
 */ class RenderHandler extends ResourceHandler {
    /**
     * Create a new RenderHandler instance.
     *
     * @param {AppBase} app - The running {@link AppBase}.
     * @ignore
     */ constructor(app){
        super(app, 'render');
        this._registry = app.assets;
    }
    open(url, data) {
        return new Render();
    }
    patch(asset, registry) {
        if (!asset.data.containerAsset) {
            return;
        }
        const containerAsset = registry.get(asset.data.containerAsset);
        if (!containerAsset) {
            registry.once(`add:${asset.data.containerAsset}`, onContainerAssetAdded, asset);
            return;
        }
        onContainerAssetAdded.call(asset, containerAsset);
    }
}

export { RenderHandler };