Initial commit

node_modules/three/examples/jsm/renderers/common/Bindings.js

@@ -0,0 +1,164 @@
+import DataMap from './DataMap.js';
+import { AttributeType } from './Constants.js';
+
+class Bindings extends DataMap {
+
+	constructor( backend, nodes, textures, attributes, pipelines, info ) {
+
+		super();
+
+		this.backend = backend;
+		this.textures = textures;
+		this.pipelines = pipelines;
+		this.attributes = attributes;
+		this.nodes = nodes;
+		this.info = info;
+
+		this.pipelines.bindings = this; // assign bindings to pipelines
+
+		this.updateMap = new WeakMap();
+
+	}
+
+	getForRender( renderObject ) {
+
+		const bindings = renderObject.getBindings();
+
+		const data = this.get( renderObject );
+
+		if ( data.bindings !== bindings ) {
+
+			// each object defines an array of bindings (ubos, textures, samplers etc.)
+
+			data.bindings = bindings;
+
+			this._init( bindings );
+
+			this.backend.createBindings( bindings );
+
+		}
+
+		return data.bindings;
+
+	}
+
+	getForCompute( computeNode ) {
+
+		const data = this.get( computeNode );
+
+		if ( data.bindings === undefined ) {
+
+			const nodeBuilderState = this.nodes.getForCompute( computeNode );
+
+			const bindings = nodeBuilderState.bindings.compute;
+
+			data.bindings = bindings;
+
+			this._init( bindings );
+
+			this.backend.createBindings( bindings );
+
+		}
+
+		return data.bindings;
+
+	}
+
+	updateForCompute( computeNode ) {
+
+		this._update( computeNode, this.getForCompute( computeNode ) );
+
+	}
+
+	updateForRender( renderObject ) {
+
+		this._update( renderObject, this.getForRender( renderObject ) );
+
+	}
+
+	_init( bindings ) {
+
+		for ( const binding of bindings ) {
+
+			if ( binding.isSampledTexture ) {
+
+				this.textures.updateTexture( binding.texture );
+
+			} else if ( binding.isStorageBuffer ) {
+
+				const attribute = binding.attribute;
+
+				this.attributes.update( attribute, AttributeType.STORAGE );
+
+			}
+
+		}
+
+	}
+
+	_update( object, bindings ) {
+
+		const { backend } = this;
+
+		const updateMap = this.updateMap;
+		const frame = this.info.render.frame;
+
+		let needsBindingsUpdate = false;
+
+		// iterate over all bindings and check if buffer updates or a new binding group is required
+
+		for ( const binding of bindings ) {
+
+			const isUpdated = updateMap.get( binding ) === frame;
+
+			if ( isUpdated ) continue;
+
+			if ( binding.isUniformBuffer ) {
+
+				const needsUpdate = binding.update();
+
+				if ( needsUpdate ) {
+
+					backend.updateBinding( binding );
+
+				}
+
+			} else if ( binding.isSampledTexture ) {
+
+				if ( binding.needsBindingsUpdate ) needsBindingsUpdate = true;
+
+				const needsUpdate = binding.update();
+
+				if ( needsUpdate ) {
+
+					this.textures.updateTexture( binding.texture );
+
+				}
+
+			}
+
+			updateMap.set( binding, frame );
+
+		}
+
+		if ( needsBindingsUpdate === true ) {
+
+			const pipeline = this.pipelines.getForRender( object );
+
+			this.backend.updateBindings( bindings, pipeline );
+
+		}
+
+	}
+
+	dispose() {
+
+		super.dispose();
+
+		this.updateMap = new WeakMap();
+
+	}
+
+}
+
+export default Bindings;