Initial project import

node_modules/three/examples/jsm/tsl/WebGLNodesHandler.js

@@ -0,0 +1,605 @@
+import {
+	GLSL3,
+	UniformsGroup,
+	Compatibility,
+	Color,
+	UniformsLib,
+	UniformsUtils,
+} from 'three';
+import {
+	context,
+	cubeTexture,
+	reference,
+	texture,
+	fog,
+	rangeFogFactor,
+	densityFogFactor,
+	workingToColorSpace,
+} from 'three/tsl';
+import {
+	NodeUtils,
+	NodeFrame,
+	Lighting,
+	InspectorBase,
+	GLSLNodeBuilder,
+	BasicNodeLibrary,
+	WebGLCapabilities,
+} from 'three/webgpu';
+
+// Limitations
+// - VSM shadows not supported
+// - MRT not supported
+// - Transmission not supported
+// - WebGPU postprocessing stack not supported
+// - Storage textures not supported
+// - Fog / environment do not automatically update - must call "dispose"
+// - instanced mesh geometry cannot be shared
+// - Node materials cannot be used with "compile" function
+
+// hash any object parameters that will impact the resulting shader so we can force
+// a program update
+function getObjectHash( object ) {
+
+	return '' + object.receiveShadow;
+
+}
+
+// Mirrors WebGLUniforms.seqWithValue from WebGLRenderer
+function generateUniformsList( program, uniforms ) {
+
+	const progUniforms = program.getUniforms();
+	const uniformsList = [];
+
+	for ( let i = 0; i < progUniforms.seq.length; i ++ ) {
+
+		const u = progUniforms.seq[ i ];
+		if ( u.id in uniforms ) uniformsList.push( u );
+
+	}
+
+	return uniformsList;
+
+}
+
+// overrides shadow nodes to use the built in shadow textures
+class WebGLNodeBuilder extends GLSLNodeBuilder {
+
+	addNode( node ) {
+
+		if ( node.isShadowNode ) {
+
+			node.setupRenderTarget = shadow => {
+
+				return { shadowMap: shadow.map, depthTexture: shadow.map.depthTexture };
+
+			};
+
+			node.updateBefore = () => {
+
+				// no need to rerender shadows since WebGLRenderer is handling it
+
+			};
+
+		}
+
+		super.addNode( node );
+
+	}
+
+}
+
+// produce and update reusable nodes for a scene
+class SceneContext {
+
+	constructor( renderer, scene ) {
+
+		// TODO: can / should we update the fog and environment node every frame for recompile?
+		this.renderer = renderer;
+		this.scene = scene;
+		this.lightsNode = renderer.lighting.getNode( scene );
+		this.fogNode = null;
+		this.environmentNode = null;
+		this.prevFog = null;
+		this.prevEnvironment = null;
+
+	}
+
+	getCacheKey() {
+
+		const { lightsNode, environmentNode, fogNode } = this;
+		const lightsHash = lightsNode.getCacheKey();
+		const envHash = environmentNode ? environmentNode.getCacheKey : 0;
+		const fogHash = fogNode ? fogNode.getCacheKey() : 0;
+		return NodeUtils.hashArray( [ lightsHash, envHash, fogHash ] );
+
+	}
+
+	update() {
+
+		const { scene, lightsNode } = this;
+
+		// update lighting
+		const sceneLights = [];
+		scene.traverse( object => {
+
+			if ( object.isLight ) {
+
+				sceneLights.push( object );
+
+			}
+
+		} );
+
+		lightsNode.setLights( sceneLights );
+
+		// update fog
+		if ( this.prevFog !== scene.fog ) {
+
+			this.fogNode = this.getFogNode();
+			this.prevFog = scene.fog;
+
+		}
+
+		// update environment
+		if ( this.prevEnvironment !== scene.environment ) {
+
+			this.environmentNode = this.getEnvironmentNode();
+			this.prevEnvironment = scene.environment;
+
+		}
+
+	}
+
+	getFogNode() {
+
+		const { scene } = this;
+		if ( scene.fog && scene.fog.isFogExp2 ) {
+
+			const color = reference( 'color', 'color', scene.fog );
+			const density = reference( 'density', 'float', scene.fog );
+			return fog( color, densityFogFactor( density ) );
+
+		} else if ( scene.fog && scene.fog.isFog ) {
+
+			const color = reference( 'color', 'color', scene.fog );
+			const near = reference( 'near', 'float', scene.fog );
+			const far = reference( 'far', 'float', scene.fog );
+			return fog( color, rangeFogFactor( near, far ) );
+
+		} else {
+
+			return null;
+
+		}
+
+	}
+
+	getEnvironmentNode() {
+
+		const { scene } = this;
+		if ( scene.environment && scene.environment.isCubeTexture ) {
+
+			return cubeTexture( scene.environment );
+
+		} else if ( scene.environment && scene.environment.isTexture ) {
+
+			return texture( scene.environment );
+
+		} else {
+
+			return null;
+
+		}
+
+	}
+
+}
+
+class RendererProxy {
+
+	constructor( renderer ) {
+
+		const backend = {
+			isWebGPUBackend: false,
+			extensions: renderer.extensions,
+			gl: renderer.getContext(),
+			capabilities: null,
+		};
+
+		backend.capabilities = new WebGLCapabilities( backend );
+
+		this.contextNode = context();
+		this.inspector = new InspectorBase();
+		this.library = new BasicNodeLibrary();
+		this.lighting = new Lighting();
+		this.backend = backend;
+
+		const self = this;
+		return new Proxy( renderer, {
+
+			get( target, property ) {
+
+				return Reflect.get( property in self ? self : target, property );
+
+			},
+
+			set( target, property, value ) {
+
+				return Reflect.set( property in self ? self : target, property, value );
+
+			}
+
+		} );
+
+	}
+
+	hasInitialized() {
+
+		return true;
+
+	}
+
+	getMRT() {
+
+		return null;
+
+	}
+
+	hasCompatibility( name ) {
+
+		if ( name === Compatibility.TEXTURE_COMPARE ) {
+
+			return true;
+
+		}
+
+		return false;
+
+	}
+
+	getCacheKey() {
+
+		return this.toneMapping + this.outputColorSpace;
+
+	}
+
+}
+
+/**
+ * Compatibility loader and builder for TSL Node materials in WebGLRenderer.
+ */
+export class WebGLNodesHandler {
+
+	/**
+	 * Constructs a new WebGL node adapter.
+	 */
+	constructor() {
+
+		this.renderer = null;
+		this.nodeFrame = new NodeFrame();
+		this.sceneContexts = new WeakMap();
+		this.programCache = new Map();
+		this.renderStack = [];
+
+		const self = this;
+		this.onDisposeMaterialCallback = function () {
+
+			// dispose of all the uniform groups
+			const { programCache } = self;
+			if ( programCache.has( this ) ) {
+
+				self.programCache.get( this ).forEach( ( { uniformsGroups } ) => {
+
+					uniformsGroups.forEach( u => u.dispose() );
+
+				} );
+
+				self.programCache.delete( this );
+
+			}
+
+			this.removeEventListener( 'dispose', self.onDisposeMaterialCallback );
+
+		};
+
+		this.getOutputCallback = function ( outputNode ) {
+
+			// apply tone mapping and color spaces to the output
+			const { outputColorSpace, toneMapping } = self.renderer;
+			outputNode = outputNode.toneMapping( toneMapping );
+			outputNode = workingToColorSpace( outputNode, outputColorSpace );
+
+			return outputNode;
+
+		};
+
+		this.onBeforeRenderCallback = function ( renderer, scene, camera, geometry, object ) {
+
+			// update node frame references for update nodes
+			const { nodeFrame } = self;
+			nodeFrame.material = this;
+			nodeFrame.object = object;
+
+			// increment "frame" here to force uniform buffers to update for the material, which otherwise only get
+			// updated once per frame.
+			renderer.info.render.frame ++;
+
+			// update the uniform groups and nodes for the program if they're available before rendering
+			if ( renderer.properties.has( this ) ) {
+
+				const currentProgram = renderer.properties.get( this ).currentProgram;
+				const programs = self.programCache.get( this );
+				if ( programs && programs.has( currentProgram ) ) {
+
+					// update the nodes for the current object
+					const { updateNodes } = programs.get( currentProgram );
+					self.updateNodes( updateNodes );
+
+				}
+
+			}
+
+			const objectHash = getObjectHash( object );
+			if ( this.prevObjectHash !== objectHash ) {
+
+				this.prevObjectHash = objectHash;
+				this.needsUpdate = true;
+
+			}
+
+		};
+
+		this.customProgramCacheKeyCallback = function () {
+
+			const { renderStack, renderer, nodeFrame } = self;
+			const sceneHash = renderStack[ renderStack.length - 1 ].sceneContext.getCacheKey();
+			const materialHash = this.constructor.prototype.customProgramCacheKey.call( this );
+			const rendererHash = renderer.getCacheKey();
+
+			return materialHash + sceneHash + rendererHash + getObjectHash( nodeFrame.object );
+
+		};
+
+	}
+
+	setRenderer( renderer ) {
+
+		const rendererProxy = new RendererProxy( renderer );
+		this.nodeFrame.renderer = rendererProxy;
+		this.renderer = rendererProxy;
+
+	}
+
+	onUpdateProgram( material, program, materialProperties ) {
+
+		const { programCache } = this;
+		if ( ! programCache.has( material ) ) {
+
+			programCache.set( material, new Map() );
+
+		}
+
+		const programs = programCache.get( material );
+		if ( ! programs.has( program ) ) {
+
+			const builder = material._latestBuilder;
+			const uniforms = materialProperties.uniforms;
+			programs.set( program, {
+				uniformsGroups: this.collectUniformsGroups( builder ),
+				uniforms: uniforms,
+				uniformsList: generateUniformsList( program, uniforms ),
+				updateNodes: builder.updateNodes,
+			} );
+
+		}
+
+		const { uniformsGroups, uniforms, uniformsList, updateNodes } = programs.get( program );
+		material.uniformsGroups = uniformsGroups;
+		materialProperties.uniforms = uniforms;
+		materialProperties.uniformsList = uniformsList;
+		this.updateNodes( updateNodes );
+
+	}
+
+
+	renderStart( scene, camera ) {
+
+		const { nodeFrame, renderStack, renderer, sceneContexts } = this;
+		nodeFrame.update();
+		nodeFrame.camera = camera;
+		nodeFrame.scene = scene;
+		nodeFrame.frameId ++;
+
+		let sceneContext = sceneContexts.get( scene );
+		if ( ! sceneContext ) {
+
+			sceneContext = new SceneContext( renderer, scene );
+			sceneContexts.set( scene, sceneContext );
+
+		}
+
+		sceneContext.update();
+		renderStack.push( { sceneContext, camera } );
+
+		// ensure all node material callbacks are initialized before
+		// traversal and build
+		const {
+			customProgramCacheKeyCallback,
+			onBeforeRenderCallback,
+		} = this;
+
+		scene.traverse( object => {
+
+			if ( object.material && object.material.isNodeMaterial ) {
+
+				object.material.customProgramCacheKey = customProgramCacheKeyCallback;
+				object.material.onBeforeRender = onBeforeRenderCallback;
+
+			}
+
+		} );
+
+	}
+
+	renderEnd() {
+
+		const { nodeFrame, renderStack } = this;
+
+		renderStack.pop();
+
+		const frame = renderStack[ renderStack.length - 1 ];
+		if ( frame ) {
+
+			const { camera, sceneContext } = frame;
+			nodeFrame.camera = camera;
+			nodeFrame.scene = sceneContext.scene;
+
+		}
+
+	}
+
+	build( material, object, parameters ) {
+
+		const {
+			nodeFrame,
+			renderer,
+			getOutputCallback,
+			onDisposeMaterialCallback,
+			renderStack,
+		} = this;
+
+		const {
+			camera,
+			sceneContext,
+		} = renderStack[ renderStack.length - 1 ];
+
+		const {
+			fogNode,
+			environmentNode,
+			lightsNode,
+			scene,
+		} = sceneContext;
+
+		// prepare the frame
+		nodeFrame.material = material;
+		nodeFrame.object = object;
+
+		// create & run the builder
+		const builder = new WebGLNodeBuilder( object, renderer );
+		builder.scene = scene;
+		builder.camera = camera;
+		builder.material = material;
+		builder.fogNode = fogNode;
+		builder.environmentNode = environmentNode;
+		builder.lightsNode = lightsNode;
+		builder.context.getOutput = getOutputCallback;
+		builder.build();
+
+		// update the shader parameters and geometry for program creation and rendering
+		this.updateShaderParameters( builder, parameters );
+		this.updateGeometryAttributes( builder, object.geometry );
+
+		// reset node frame settings to account for any intermediate renders
+		nodeFrame.material = material;
+		nodeFrame.object = object;
+
+		// set up callbacks for uniforms and node updates
+		material._latestBuilder = builder;
+		material.addEventListener( 'dispose', onDisposeMaterialCallback );
+		this.updateNodes( builder.updateNodes );
+
+	}
+
+	updateGeometryAttributes( builder, geometry ) {
+
+		// TODO: this may cause issues if the material / geometry is used in multiple places
+
+		// add instancing attributes
+		builder.bufferAttributes.forEach( v => {
+
+			geometry.setAttribute( v.name, v.node.attribute );
+
+		} );
+
+		// force WebGLAttributes & WebGLBindingStates to refresh
+		// could be fixed by running "build" sooner? Or calling "WebGLAttributes" separately for those
+		// associated with a material?
+		queueMicrotask( () => geometry.dispose() );
+
+	}
+
+	updateShaderParameters( builder, parameters ) {
+
+		// set up shaders
+		parameters.isRawShaderMaterial = true;
+		parameters.glslVersion = GLSL3;
+		parameters.vertexShader = builder.vertexShader.replace( /#version 300 es/, '' );
+		parameters.fragmentShader = builder.fragmentShader.replace( /#version 300 es/, '' );
+
+		// add uniforms accessed by WebGLRenderer
+		parameters.uniforms = {
+			fogColor: { value: new Color() },
+			fogNear: { value: 0 },
+			fogFar: { value: 0 },
+			envMapIntensity: { value: 0 },
+			...UniformsUtils.clone( UniformsLib.lights )
+		};
+
+		// init uniforms
+		const builderUniforms = [ ...builder.uniforms.vertex, ...builder.uniforms.fragment ];
+		for ( const uniform of builderUniforms ) {
+
+			parameters.uniforms[ uniform.name ] = uniform.node;
+
+		}
+
+	}
+
+	collectUniformsGroups( builder ) {
+
+		// create UniformsGroups for regular grouped uniforms
+		const uniformsGroups = [];
+		for ( const key in builder.uniformGroups ) {
+
+			const { uniforms } = builder.uniformGroups[ key ];
+			const group = new UniformsGroup();
+			group.name = key;
+			group.uniforms = uniforms.map( node => node.nodeUniform );
+			uniformsGroups.push( group );
+
+		}
+
+		// init uniforms
+		const builderUniforms = [ ...builder.uniforms.vertex, ...builder.uniforms.fragment ];
+		for ( const uniform of builderUniforms ) {
+
+			if ( uniform.type === 'buffer' ) {
+
+				// buffer uniforms are all nested in groups
+				const group = new UniformsGroup();
+				group.name = uniform.node.name;
+				group.uniforms = [ uniform ];
+				uniformsGroups.push( group );
+
+			}
+
+		}
+
+		return uniformsGroups;
+
+	}
+
+	updateNodes( updateNodes ) {
+
+		// update nodes for render
+		const { nodeFrame } = this;
+		nodeFrame.renderId ++;
+		for ( const node of updateNodes ) {
+
+			nodeFrame.updateNode( node );
+
+		}
+
+	}
+
+}