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web-app/node_modules/three/examples/jsm/tsl/display/BloomNode.js

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+import { HalfFloatType, RenderTarget, Vector2, Vector3, PostProcessingUtils } from 'three';
+import { TempNode, nodeObject, Fn, float, NodeUpdateType, uv, passTexture, uniform, QuadMesh, NodeMaterial, Loop, texture, luminance, smoothstep, mix, vec4, uniformArray, add, int } from 'three/tsl';
+
+const _quadMesh = /*@__PURE__*/ new QuadMesh();
+const _size = /*@__PURE__*/ new Vector2();
+
+const _BlurDirectionX = /*@__PURE__*/ new Vector2( 1.0, 0.0 );
+const _BlurDirectionY = /*@__PURE__*/ new Vector2( 0.0, 1.0 );
+
+let _rendererState;
+
+class BloomNode extends TempNode {
+
+	static get type() {
+
+		return 'BloomNode';
+
+	}
+
+	constructor( inputNode, strength = 1, radius = 0, threshold = 0 ) {
+
+		super();
+
+		this.inputNode = inputNode;
+		this.strength = uniform( strength );
+		this.radius = uniform( radius );
+		this.threshold = uniform( threshold );
+
+		this.smoothWidth = uniform( 0.01 );
+
+		//
+
+		this._renderTargetsHorizontal = [];
+		this._renderTargetsVertical = [];
+		this._nMips = 5;
+
+		// render targets
+
+		this._renderTargetBright = new RenderTarget( 1, 1, { depthBuffer: false, type: HalfFloatType } );
+		this._renderTargetBright.texture.name = 'UnrealBloomPass.bright';
+		this._renderTargetBright.texture.generateMipmaps = false;
+
+		for ( let i = 0; i < this._nMips; i ++ ) {
+
+			const renderTargetHorizontal = new RenderTarget( 1, 1, { depthBuffer: false, type: HalfFloatType } );
+
+			renderTargetHorizontal.texture.name = 'UnrealBloomPass.h' + i;
+			renderTargetHorizontal.texture.generateMipmaps = false;
+
+			this._renderTargetsHorizontal.push( renderTargetHorizontal );
+
+			const renderTargetVertical = new RenderTarget( 1, 1, { depthBuffer: false, type: HalfFloatType } );
+
+			renderTargetVertical.texture.name = 'UnrealBloomPass.v' + i;
+			renderTargetVertical.texture.generateMipmaps = false;
+
+			this._renderTargetsVertical.push( renderTargetVertical );
+
+		}
+
+		// materials
+
+		this._compositeMaterial = null;
+		this._highPassFilterMaterial = null;
+		this._separableBlurMaterials = [];
+
+		// pass and texture nodes
+
+		this._textureNodeBright = texture( this._renderTargetBright.texture );
+		this._textureNodeBlur0 = texture( this._renderTargetsVertical[ 0 ].texture );
+		this._textureNodeBlur1 = texture( this._renderTargetsVertical[ 1 ].texture );
+		this._textureNodeBlur2 = texture( this._renderTargetsVertical[ 2 ].texture );
+		this._textureNodeBlur3 = texture( this._renderTargetsVertical[ 3 ].texture );
+		this._textureNodeBlur4 = texture( this._renderTargetsVertical[ 4 ].texture );
+
+		this._textureOutput = passTexture( this, this._renderTargetsHorizontal[ 0 ].texture );
+
+		this.updateBeforeType = NodeUpdateType.FRAME;
+
+	}
+
+	getTextureNode() {
+
+		return this._textureOutput;
+
+	}
+
+	setSize( width, height ) {
+
+		let resx = Math.round( width / 2 );
+		let resy = Math.round( height / 2 );
+
+		this._renderTargetBright.setSize( resx, resy );
+
+		for ( let i = 0; i < this._nMips; i ++ ) {
+
+			this._renderTargetsHorizontal[ i ].setSize( resx, resy );
+			this._renderTargetsVertical[ i ].setSize( resx, resy );
+
+			this._separableBlurMaterials[ i ].invSize.value.set( 1 / resx, 1 / resy );
+
+			resx = Math.round( resx / 2 );
+			resy = Math.round( resy / 2 );
+
+		}
+
+	}
+
+	updateBefore( frame ) {
+
+		const { renderer } = frame;
+
+		_rendererState = PostProcessingUtils.resetRendererState( renderer, _rendererState );
+
+		//
+
+		const size = renderer.getDrawingBufferSize( _size );
+		this.setSize( size.width, size.height );
+
+		// 1. Extract Bright Areas
+
+		renderer.setRenderTarget( this._renderTargetBright );
+		_quadMesh.material = this._highPassFilterMaterial;
+		_quadMesh.render( renderer );
+
+		// 2. Blur All the mips progressively
+
+		let inputRenderTarget = this._renderTargetBright;
+
+		for ( let i = 0; i < this._nMips; i ++ ) {
+
+			_quadMesh.material = this._separableBlurMaterials[ i ];
+
+			this._separableBlurMaterials[ i ].colorTexture.value = inputRenderTarget.texture;
+			this._separableBlurMaterials[ i ].direction.value = _BlurDirectionX;
+			renderer.setRenderTarget( this._renderTargetsHorizontal[ i ] );
+			_quadMesh.render( renderer );
+
+			this._separableBlurMaterials[ i ].colorTexture.value = this._renderTargetsHorizontal[ i ].texture;
+			this._separableBlurMaterials[ i ].direction.value = _BlurDirectionY;
+			renderer.setRenderTarget( this._renderTargetsVertical[ i ] );
+			_quadMesh.render( renderer );
+
+			inputRenderTarget = this._renderTargetsVertical[ i ];
+
+		}
+
+		// 3. Composite All the mips
+
+		renderer.setRenderTarget( this._renderTargetsHorizontal[ 0 ] );
+		_quadMesh.material = this._compositeMaterial;
+		_quadMesh.render( renderer );
+
+		// restore
+
+		PostProcessingUtils.restoreRendererState( renderer, _rendererState );
+
+	}
+
+	setup( builder ) {
+
+		// luminosity high pass material
+
+		const luminosityHighPass = Fn( () => {
+
+			const texel = this.inputNode;
+			const v = luminance( texel.rgb );
+
+			const alpha = smoothstep( this.threshold, this.threshold.add( this.smoothWidth ), v );
+
+			return mix( vec4( 0 ), texel, alpha );
+
+		} );
+
+		this._highPassFilterMaterial = this._highPassFilterMaterial || new NodeMaterial();
+		this._highPassFilterMaterial.fragmentNode = luminosityHighPass().context( builder.getSharedContext() );
+		this._highPassFilterMaterial.name = 'Bloom_highPass';
+		this._highPassFilterMaterial.needsUpdate = true;
+
+		// gaussian blur materials
+
+		const kernelSizeArray = [ 3, 5, 7, 9, 11 ];
+
+		for ( let i = 0; i < this._nMips; i ++ ) {
+
+			this._separableBlurMaterials.push( this._getSeperableBlurMaterial( builder, kernelSizeArray[ i ] ) );
+
+		}
+
+		// composite material
+
+		const bloomFactors = uniformArray( [ 1.0, 0.8, 0.6, 0.4, 0.2 ] );
+		const bloomTintColors = uniformArray( [ new Vector3( 1, 1, 1 ), new Vector3( 1, 1, 1 ), new Vector3( 1, 1, 1 ), new Vector3( 1, 1, 1 ), new Vector3( 1, 1, 1 ) ] );
+
+		const lerpBloomFactor = Fn( ( [ factor, radius ] ) => {
+
+			const mirrorFactor = float( 1.2 ).sub( factor );
+			return mix( factor, mirrorFactor, radius );
+
+		} ).setLayout( {
+			name: 'lerpBloomFactor',
+			type: 'float',
+			inputs: [
+				{ name: 'factor', type: 'float' },
+				{ name: 'radius', type: 'float' },
+			]
+		} );
+
+
+		const compositePass = Fn( () => {
+
+			const color0 = lerpBloomFactor( bloomFactors.element( 0 ), this.radius ).mul( vec4( bloomTintColors.element( 0 ), 1.0 ) ).mul( this._textureNodeBlur0 );
+			const color1 = lerpBloomFactor( bloomFactors.element( 1 ), this.radius ).mul( vec4( bloomTintColors.element( 1 ), 1.0 ) ).mul( this._textureNodeBlur1 );
+			const color2 = lerpBloomFactor( bloomFactors.element( 2 ), this.radius ).mul( vec4( bloomTintColors.element( 2 ), 1.0 ) ).mul( this._textureNodeBlur2 );
+			const color3 = lerpBloomFactor( bloomFactors.element( 3 ), this.radius ).mul( vec4( bloomTintColors.element( 3 ), 1.0 ) ).mul( this._textureNodeBlur3 );
+			const color4 = lerpBloomFactor( bloomFactors.element( 4 ), this.radius ).mul( vec4( bloomTintColors.element( 4 ), 1.0 ) ).mul( this._textureNodeBlur4 );
+
+			const sum = color0.add( color1 ).add( color2 ).add( color3 ).add( color4 );
+
+			return sum.mul( this.strength );
+
+		} );
+
+		this._compositeMaterial = this._compositeMaterial || new NodeMaterial();
+		this._compositeMaterial.fragmentNode = compositePass().context( builder.getSharedContext() );
+		this._compositeMaterial.name = 'Bloom_comp';
+		this._compositeMaterial.needsUpdate = true;
+
+		//
+
+		return this._textureOutput;
+
+	}
+
+	dispose() {
+
+		for ( let i = 0; i < this._renderTargetsHorizontal.length; i ++ ) {
+
+			this._renderTargetsHorizontal[ i ].dispose();
+
+		}
+
+		for ( let i = 0; i < this._renderTargetsVertical.length; i ++ ) {
+
+			this._renderTargetsVertical[ i ].dispose();
+
+		}
+
+		this._renderTargetBright.dispose();
+
+	}
+
+	_getSeperableBlurMaterial( builder, kernelRadius ) {
+
+		const coefficients = [];
+
+		for ( let i = 0; i < kernelRadius; i ++ ) {
+
+			coefficients.push( 0.39894 * Math.exp( - 0.5 * i * i / ( kernelRadius * kernelRadius ) ) / kernelRadius );
+
+		}
+
+		//
+
+		const colorTexture = texture();
+		const gaussianCoefficients = uniformArray( coefficients );
+		const invSize = uniform( new Vector2() );
+		const direction = uniform( new Vector2( 0.5, 0.5 ) );
+
+		const uvNode = uv();
+		const sampleTexel = ( uv ) => colorTexture.uv( uv );
+
+		const seperableBlurPass = Fn( () => {
+
+			const weightSum = gaussianCoefficients.element( 0 ).toVar();
+			const diffuseSum = sampleTexel( uvNode ).rgb.mul( weightSum ).toVar();
+
+			Loop( { start: int( 1 ), end: int( kernelRadius ), type: 'int', condition: '<' }, ( { i } ) => {
+
+				const x = float( i );
+				const w = gaussianCoefficients.element( i );
+				const uvOffset = direction.mul( invSize ).mul( x );
+				const sample1 = sampleTexel( uvNode.add( uvOffset ) ).rgb;
+				const sample2 = sampleTexel( uvNode.sub( uvOffset ) ).rgb;
+				diffuseSum.addAssign( add( sample1, sample2 ).mul( w ) );
+				weightSum.addAssign( float( 2.0 ).mul( w ) );
+
+			} );
+
+			return vec4( diffuseSum.div( weightSum ), 1.0 );
+
+		} );
+
+		const seperableBlurMaterial = new NodeMaterial();
+		seperableBlurMaterial.fragmentNode = seperableBlurPass().context( builder.getSharedContext() );
+		seperableBlurMaterial.name = 'Bloom_seperable';
+		seperableBlurMaterial.needsUpdate = true;
+
+		// uniforms
+		seperableBlurMaterial.colorTexture = colorTexture;
+		seperableBlurMaterial.direction = direction;
+		seperableBlurMaterial.invSize = invSize;
+
+		return seperableBlurMaterial;
+
+	}
+
+}
+
+export const bloom = ( node, strength, radius, threshold ) => nodeObject( new BloomNode( nodeObject( node ), strength, radius, threshold ) );
+
+export default BloomNode;