Vom Anderen PC aus hoch gespielt

2026-02-01 13:40:05 +01:00
commit 60b1b7591c
1088 changed files with 452896 additions and 0 deletions
--- a/node_modules/three/examples/jsm/renderers/webgl/WebGLBackend.js
+++ b/node_modules/three/examples/jsm/renderers/webgl/WebGLBackend.js
@@ -0,0 +1,943 @@
+import { WebGLCoordinateSystem } from 'three';
+
+import GLSLNodeBuilder from './nodes/GLSLNodeBuilder.js';
+import Backend from '../common/Backend.js';
+
+import WebGLAttributeUtils from './utils/WebGLAttributeUtils.js';
+import WebGLState from './utils/WebGLState.js';
+import WebGLUtils from './utils/WebGLUtils.js';
+import WebGLTextureUtils from './utils/WebGLTextureUtils.js';
+import WebGLExtensions from './utils/WebGLExtensions.js';
+
+//
+
+class WebGLBackend extends Backend {
+
+	constructor( parameters = {} ) {
+
+		super( parameters );
+
+		this.isWebGLBackend = true;
+
+	}
+
+	async init( renderer ) {
+
+		await super.init( renderer );
+
+		//
+
+		const parameters = this.parameters;
+
+		const glContext = ( parameters.context !== undefined ) ? parameters.context : renderer.domElement.getContext( 'webgl2' );
+
+		this.gl = glContext;
+
+		this.extensions = new WebGLExtensions( this );
+		this.attributeUtils = new WebGLAttributeUtils( this );
+		this.textureUtils = new WebGLTextureUtils( this );
+		this.state = new WebGLState( this );
+		this.utils = new WebGLUtils( this );
+		this.defaultTextures = {};
+
+		this.extensions.get( 'EXT_color_buffer_float' );
+		this._currentContext = null;
+
+	}
+
+	get coordinateSystem() {
+
+		return WebGLCoordinateSystem;
+
+	}
+
+	beginRender( renderContext ) {
+
+		const { gl } = this;
+		const renderContextData = this.get( renderContext );
+
+		//
+
+		renderContextData.previousContext = this._currentContext;
+		this._currentContext = renderContext;
+
+		this._setFramebuffer( renderContext );
+
+		this.clear( renderContext, renderContext.clearColor, renderContext.clearDepth, renderContext.clearStencil );
+
+		//
+
+		if ( renderContext.viewport ) {
+
+			this.updateViewport( renderContext );
+
+		} else {
+
+			gl.viewport( 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight );
+
+		}
+
+		const occlusionQueryCount = renderContext.occlusionQueryCount;
+
+		if ( occlusionQueryCount > 0 ) {
+
+			// Get a reference to the array of objects with queries. The renderContextData property
+			// can be changed by another render pass before the async reading of all previous queries complete
+			renderContextData.currentOcclusionQueries = renderContextData.occlusionQueries;
+			renderContextData.currentOcclusionQueryObjects = renderContextData.occlusionQueryObjects;
+
+			renderContextData.lastOcclusionObject = null;
+			renderContextData.occlusionQueries = new Array( occlusionQueryCount );
+			renderContextData.occlusionQueryObjects = new Array( occlusionQueryCount );
+			renderContextData.occlusionQueryIndex = 0;
+
+		}
+
+	}
+
+	finishRender( renderContext ) {
+
+		const renderContextData = this.get( renderContext );
+		const previousContext = renderContextData.previousContext;
+
+		this._currentContext = previousContext;
+
+		if ( previousContext !== null ) {
+
+			this._setFramebuffer( previousContext );
+
+			if ( previousContext.viewport ) {
+
+				this.updateViewport( previousContext );
+
+			} else {
+
+				const gl = this.gl;
+
+				gl.viewport( 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight );
+
+			}
+
+		}
+
+		const occlusionQueryCount = renderContext.occlusionQueryCount;
+
+		if ( occlusionQueryCount > 0 ) {
+
+			const renderContextData = this.get( renderContext );
+
+			if ( occlusionQueryCount > renderContextData.occlusionQueryIndex ) {
+
+				const { gl } = this;
+
+				gl.endQuery( gl.ANY_SAMPLES_PASSED );
+
+			}
+
+			this.resolveOccludedAsync( renderContext );
+
+		}
+
+	}
+
+	resolveOccludedAsync( renderContext ) {
+
+		const renderContextData = this.get( renderContext );
+
+		// handle occlusion query results
+
+		const { currentOcclusionQueries, currentOcclusionQueryObjects } = renderContextData;
+
+		if ( currentOcclusionQueries && currentOcclusionQueryObjects ) {
+
+			const occluded = new WeakSet();
+			const { gl } = this;
+
+			renderContextData.currentOcclusionQueryObjects = null;
+			renderContextData.currentOcclusionQueries = null;
+
+			const check = () => {
+
+				let completed = 0;
+
+				// check all queries and requeue as appropriate
+				for ( let i = 0; i < currentOcclusionQueries.length; i ++ ) {
+
+					const query = currentOcclusionQueries[ i ];
+
+					if ( query === null ) continue;
+
+					if ( gl.getQueryParameter( query, gl.QUERY_RESULT_AVAILABLE ) ) {
+
+						if ( gl.getQueryParameter( query, gl.QUERY_RESULT ) > 0 ) occluded.add( currentOcclusionQueryObjects[ i ] );
+
+						currentOcclusionQueries[ i ] = null;
+						gl.deleteQuery( query );
+
+						completed ++;
+
+					}
+
+				}
+
+				if ( completed < currentOcclusionQueries.length ) {
+
+					requestAnimationFrame( check );
+
+				} else {
+
+					renderContextData.occluded = occluded;
+
+				}
+
+			}
+
+			check();
+
+		}
+
+	}
+
+	isOccluded( renderContext, object ) {
+
+		const renderContextData = this.get( renderContext );
+
+		return renderContextData.occluded && renderContextData.occluded.has( object );
+
+	}
+
+	updateViewport( renderContext ) {
+
+		const gl = this.gl;
+		const { x, y, width, height } = renderContext.viewportValue;
+
+		gl.viewport( x, y, width, height );
+
+	}
+
+	clear( renderContext, color, depth, stencil ) {
+
+		const { gl } = this;
+
+		//
+
+		let clear = 0;
+
+		if ( color ) clear |= gl.COLOR_BUFFER_BIT;
+		if ( depth ) clear |= gl.DEPTH_BUFFER_BIT;
+		if ( stencil ) clear |= gl.STENCIL_BUFFER_BIT;
+
+		if ( clear !== 0 ) {
+
+			const clearColor = renderContext.clearColorValue;
+
+			if ( depth ) this.state.setDepthMask( true );
+
+			if ( renderContext.textures === null ) {
+
+				gl.clearColor( clearColor.r, clearColor.g, clearColor.b, clearColor.a );
+				gl.clear( clear );
+
+			} else {
+
+				if ( color ) {
+
+					for ( let i = 0; i < renderContext.textures.length; i ++ ) {
+
+						gl.clearBufferfv( gl.COLOR, i, [ clearColor.r, clearColor.g, clearColor.b, clearColor.a ] );
+
+					}
+				}
+
+				if ( depth && stencil ) {
+
+					gl.clearBufferfi( gl.DEPTH_STENCIL, 0, 1, 0 );
+
+				} else if ( depth ) {
+
+					gl.clearBufferfv( gl.DEPTH, 0, [ 1.0 ] );
+
+				} else if ( stencil ) {
+
+					gl.clearBufferiv( gl.STENCIL, 0, [ 0 ] );
+				}
+
+			}
+
+		}
+
+	}
+
+	beginCompute( /*computeGroup*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	compute( /*computeGroup, computeNode, bindings, pipeline*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	finishCompute( /*computeGroup*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	draw( renderObject, info ) {
+
+		const { pipeline, material, context } = renderObject;
+		const { programGPU, vaoGPU } = this.get( pipeline );
+
+		const { gl, state } = this;
+
+		const contextData = this.get( context );
+
+		//
+
+		const bindings = renderObject.getBindings();
+
+		for ( const binding of bindings ) {
+
+			const bindingData = this.get( binding );
+			const index = bindingData.index;
+
+			if ( binding.isUniformsGroup || binding.isUniformBuffer ) {
+
+				gl.bindBufferBase( gl.UNIFORM_BUFFER, index, bindingData.bufferGPU );
+
+			} else if ( binding.isSampledTexture ) {
+
+				gl.activeTexture( gl.TEXTURE0 + index );
+				gl.bindTexture( bindingData.glTextureType, bindingData.textureGPU );
+
+			}
+
+		}
+
+		state.setMaterial( material );
+
+		gl.useProgram( programGPU );
+		gl.bindVertexArray( vaoGPU );
+
+		//
+
+		const index = renderObject.getIndex();
+
+		const object = renderObject.object;
+		const geometry = renderObject.geometry;
+		const drawRange = geometry.drawRange;
+		const firstVertex = drawRange.start;
+
+		//
+
+		const lastObject = contextData.lastOcclusionObject;
+
+		if ( lastObject !== object && lastObject !== undefined ) {
+
+			if ( lastObject !== null && lastObject.occlusionTest === true ) {
+
+				gl.endQuery( gl.ANY_SAMPLES_PASSED );
+
+				contextData.occlusionQueryIndex ++;
+
+			}
+
+			if ( object.occlusionTest === true ) {
+
+				const query = gl.createQuery();
+
+				gl.beginQuery( gl.ANY_SAMPLES_PASSED, query );
+
+				contextData.occlusionQueries[ contextData.occlusionQueryIndex ] = query;
+				contextData.occlusionQueryObjects[ contextData.occlusionQueryIndex ] = object;
+
+			}
+
+			contextData.lastOcclusionObject = object;
+
+		}
+
+		//
+
+		let mode;
+		if ( object.isPoints ) mode = gl.POINTS;
+		else if ( object.isLineSegments ) mode = gl.LINES;
+		else if ( object.isLine ) mode = gl.LINE_STRIP;
+		else if ( object.isLineLoop ) mode = gl.LINE_LOOP;
+		else mode = gl.TRIANGLES;
+
+		//
+
+		const instanceCount = this.getInstanceCount( renderObject );
+
+		if ( index !== null ) {
+
+			const indexData = this.get( index );
+			const indexCount = ( drawRange.count !== Infinity ) ? drawRange.count : index.count;
+
+			if ( instanceCount > 1 ) {
+
+				gl.drawElementsInstanced( mode, index.count, indexData.type, firstVertex, instanceCount );
+
+			} else {
+
+				gl.drawElements( mode, index.count, indexData.type, firstVertex );
+
+			}
+
+
+			info.update( object, indexCount, 1 );
+
+		} else {
+
+			const positionAttribute = geometry.attributes.position;
+			const vertexCount = ( drawRange.count !== Infinity ) ? drawRange.count : positionAttribute.count;
+
+			if ( instanceCount > 1 ) {
+
+				gl.drawArraysInstanced( mode, 0, vertexCount, instanceCount );
+
+			} else {
+
+				gl.drawArrays( mode, 0, vertexCount );
+
+			}
+
+			//gl.drawArrays( mode, vertexCount, gl.UNSIGNED_SHORT, firstVertex );
+
+			info.update( object, vertexCount, 1 );
+
+		}
+
+
+
+		//
+
+		gl.bindVertexArray( null );
+
+	}
+
+	needsUpdate( renderObject ) {
+
+		return false;
+
+	}
+
+	getCacheKey( renderObject ) {
+
+		return renderObject.geometry.id;
+
+	}
+
+	// textures
+
+	createSampler( /*texture*/ ) {
+
+		//console.warn( 'Abstract class.' );
+
+	}
+
+	destroySampler( /*texture*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	createDefaultTexture( texture ) {
+
+		const { gl, textureUtils, defaultTextures } = this;
+
+		const glTextureType = textureUtils.getGLTextureType( texture );
+
+		let textureGPU = defaultTextures[ glTextureType ];
+
+		if ( textureGPU === undefined ) {
+
+			textureGPU = gl.createTexture();
+
+			gl.bindTexture( glTextureType, textureGPU );
+			gl.texParameteri( glTextureType, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
+			gl.texParameteri( glTextureType, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
+
+			//gl.texImage2D( target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );
+
+			defaultTextures[ glTextureType ] = textureGPU;
+
+		}
+
+		this.set( texture, {
+			textureGPU,
+			glTextureType,
+			isDefault: true
+		} );
+
+	}
+
+	createTexture( texture, options ) {
+
+		const { gl, utils, textureUtils } = this;
+		const { levels, width, height } = options;
+
+		const glFormat = utils.convert( texture.format, texture.colorSpace );
+		const glType = utils.convert( texture.type );
+		const glInternalFormat = textureUtils.getInternalFormat( texture.internalFormat, glFormat, glType, texture.colorSpace, texture.isVideoTexture );
+
+		const textureGPU = gl.createTexture();
+		const glTextureType = textureUtils.getGLTextureType( texture );
+
+		gl.bindTexture( glTextureType, textureGPU );
+
+		gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
+		gl.pixelStorei( gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
+		gl.pixelStorei( gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
+		gl.pixelStorei( gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE );
+
+		textureUtils.setTextureParameters( glTextureType, texture );
+
+		gl.bindTexture( glTextureType, textureGPU );
+
+		if ( ! texture.isVideoTexture ) {
+
+			gl.texStorage2D( glTextureType, levels, glInternalFormat, width, height );
+
+		}
+
+		this.set( texture, {
+			textureGPU,
+			glTextureType,
+			glFormat,
+			glType,
+			glInternalFormat
+		} );
+
+	}
+
+	updateTexture( texture, options ) {
+
+		const { gl } = this;
+		const { width, height } = options;
+		const { textureGPU, glTextureType, glFormat, glType, glInternalFormat } = this.get( texture );
+
+		const getImage = ( source ) => {
+
+			if ( source.isDataTexture ) {
+
+				return source.image.data;
+
+			} else if ( source instanceof ImageBitmap || source instanceof OffscreenCanvas || source instanceof HTMLImageElement || source instanceof HTMLCanvasElement ) {
+
+				return source;
+
+			}
+
+			return source.data;
+
+		};
+
+		gl.bindTexture( glTextureType, textureGPU );
+
+		if ( texture.isCubeTexture ) {
+
+			const images = options.images;
+
+			for ( let i = 0; i < 6; i ++ ) {
+
+				const image = getImage( images[ i ] );
+
+				gl.texSubImage2D( gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, width, height, glFormat, glType, image );
+
+			}
+
+		} else if ( texture.isVideoTexture ) {
+
+			texture.update();
+
+			gl.texImage2D( glTextureType, 0, glInternalFormat, glFormat, glType, options.image );
+
+
+		} else {
+
+			const image = getImage( options.image );
+
+			gl.texSubImage2D( glTextureType, 0, 0, 0, width, height, glFormat, glType, image );
+
+		}
+
+	}
+
+	generateMipmaps( texture ) {
+
+		const { gl } = this;
+		const { textureGPU, glTextureType } = this.get( texture );
+
+		gl.bindTexture( glTextureType, textureGPU );
+		gl.generateMipmap( glTextureType );
+
+	}
+
+	destroyTexture( /*texture*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	copyTextureToBuffer( /*texture, x, y, width, height*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	// node builder
+
+	createNodeBuilder( object, renderer, scene = null ) {
+
+		return new GLSLNodeBuilder( object, renderer, scene );
+
+	}
+
+	// program
+
+	createProgram( program ) {
+
+		const gl = this.gl;
+		const { stage, code } = program;
+
+		const shader = stage === 'vertex' ? gl.createShader( gl.VERTEX_SHADER ) : gl.createShader( gl.FRAGMENT_SHADER );
+
+		gl.shaderSource( shader, code );
+		gl.compileShader( shader );
+
+		this.set( program, {
+			shaderGPU: shader
+		} );
+
+	}
+
+	destroyProgram( /*program*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	createRenderPipeline( renderObject ) {
+
+		const gl = this.gl;
+		const pipeline = renderObject.pipeline;
+
+		// Program
+
+		const { fragmentProgram, vertexProgram } = pipeline;
+
+		const programGPU = gl.createProgram();
+
+		const fragmentShader = this.get( fragmentProgram ).shaderGPU;
+		const vertexShader = this.get( vertexProgram ).shaderGPU;
+
+		gl.attachShader( programGPU, fragmentShader );
+		gl.attachShader( programGPU, vertexShader );
+		gl.linkProgram( programGPU );
+
+		if ( gl.getProgramParameter( programGPU, gl.LINK_STATUS ) === false ) {
+
+			console.error( 'THREE.WebGLBackend:', gl.getProgramInfoLog( programGPU ) );
+
+			console.error( 'THREE.WebGLBackend:', gl.getShaderInfoLog( fragmentShader ) );
+			console.error( 'THREE.WebGLBackend:', gl.getShaderInfoLog( vertexShader ) );
+
+		}
+
+		gl.useProgram( programGPU );
+
+		// Bindings
+
+		const bindings = renderObject.getBindings();
+
+		for ( const binding of bindings ) {
+
+			const bindingData = this.get( binding );
+			const index = bindingData.index;
+
+			if ( binding.isUniformsGroup || binding.isUniformBuffer ) {
+
+				const location = gl.getUniformBlockIndex( programGPU, binding.name );
+				gl.uniformBlockBinding( programGPU, location, index );
+
+			} else if ( binding.isSampledTexture ) {
+
+				const location = gl.getUniformLocation( programGPU, binding.name );
+				gl.uniform1i( location, index );
+
+			}
+
+		}
+
+		// VAO
+
+		const vaoGPU = gl.createVertexArray();
+
+		const index = renderObject.getIndex();
+		const attributes = renderObject.getAttributes();
+
+		gl.bindVertexArray( vaoGPU );
+
+		if ( index !== null ) {
+
+			const indexData = this.get( index );
+
+			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, indexData.bufferGPU );
+
+		}
+
+		for ( let i = 0; i < attributes.length; i ++ ) {
+
+			const attribute = attributes[ i ];
+			const attributeData = this.get( attribute );
+
+			gl.bindBuffer( gl.ARRAY_BUFFER, attributeData.bufferGPU );
+			gl.enableVertexAttribArray( i );
+
+			let stride, offset;
+
+			if ( attribute.isInterleavedBufferAttribute === true ) {
+
+				stride = attribute.data.stride * attributeData.bytesPerElement;
+				offset = attribute.offset * attributeData.bytesPerElement;
+
+			} else {
+
+				stride = 0;
+				offset = 0;
+
+			}
+
+			if ( attributeData.isFloat ) {
+
+				gl.vertexAttribPointer( i, attribute.itemSize, attributeData.type, false, stride, offset );
+
+			} else {
+
+				gl.vertexAttribIPointer( i, attribute.itemSize, attributeData.type, stride, offset );
+
+			}
+
+			if ( attribute.isInstancedBufferAttribute && ! attribute.isInterleavedBufferAttribute ) {
+
+				gl.vertexAttribDivisor( i, attribute.meshPerAttribute );
+
+			} else if ( attribute.isInterleavedBufferAttribute && attribute.data.isInstancedInterleavedBuffer ) {
+
+				gl.vertexAttribDivisor( i, attribute.data.meshPerAttribute );
+
+			}
+
+		}
+
+		gl.bindVertexArray( null );
+
+		//
+
+		this.set( pipeline, {
+			programGPU,
+			vaoGPU
+		} );
+
+	}
+
+	createComputePipeline( /*computePipeline, bindings*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	createBindings( bindings ) {
+
+		this.updateBindings( bindings );
+
+	}
+
+	updateBindings( bindings ) {
+
+		const { gl } = this;
+
+		let groupIndex = 0;
+		let textureIndex = 0;
+
+		for ( const binding of bindings ) {
+
+			if ( binding.isUniformsGroup || binding.isUniformBuffer ) {
+
+				const bufferGPU = gl.createBuffer();
+				const data = binding.buffer;
+
+				gl.bindBuffer( gl.UNIFORM_BUFFER, bufferGPU );
+				gl.bufferData( gl.UNIFORM_BUFFER, data, gl.DYNAMIC_DRAW );
+				gl.bindBufferBase( gl.UNIFORM_BUFFER, groupIndex, bufferGPU );
+
+				this.set( binding, {
+					index: groupIndex ++,
+					bufferGPU
+				} );
+
+			} else if ( binding.isSampledTexture ) {
+
+				const { textureGPU, glTextureType } = this.get( binding.texture );
+
+				this.set( binding, {
+					index: textureIndex ++,
+					textureGPU,
+					glTextureType
+				} );
+
+			}
+
+		}
+
+	}
+
+	updateBinding( binding ) {
+
+		const gl = this.gl;
+
+		if ( binding.isUniformsGroup || binding.isUniformBuffer ) {
+
+			const bindingData = this.get( binding );
+			const bufferGPU = bindingData.bufferGPU;
+			const data = binding.buffer;
+
+			gl.bindBuffer( gl.UNIFORM_BUFFER, bufferGPU );
+			gl.bufferData( gl.UNIFORM_BUFFER, data, gl.DYNAMIC_DRAW );
+
+		}
+
+	}
+
+	// attributes
+
+	createIndexAttribute( attribute ) {
+
+		const gl = this.gl;
+
+		this.attributeUtils.createAttribute( attribute, gl.ELEMENT_ARRAY_BUFFER );
+
+	}
+
+	createAttribute( attribute ) {
+
+		const gl = this.gl;
+
+		this.attributeUtils.createAttribute( attribute, gl.ARRAY_BUFFER );
+
+	}
+
+	createStorageAttribute( /*attribute*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	updateAttribute( attribute ) {
+
+		this.attributeUtils.updateAttribute( attribute );
+
+	}
+
+	destroyAttribute( /*attribute*/ ) {
+
+		console.warn( 'Abstract class.' );
+
+	}
+
+	updateSize() {
+
+		//console.warn( 'Abstract class.' );
+
+	}
+
+	hasFeature( name ) {
+
+		return true;
+
+	}
+
+	copyFramebufferToTexture( texture /*, renderContext */ ) {
+
+		const { gl } = this;
+
+		const { textureGPU } = this.get( texture );
+
+		gl.bindFramebuffer( gl.FRAMEBUFFER, null );
+		gl.bindTexture( gl.TEXTURE_2D, textureGPU );
+
+		gl.copyTexSubImage2D( gl.TEXTURE_2D, 0, 0, 0, 0, 0, texture.image.width, texture.image.height );
+
+		if ( texture.generateMipmaps ) gl.generateMipmap( gl.TEXTURE_2D );
+
+		gl.bindTexture( gl.TEXTURE_2D, null );
+
+	}
+
+	_setFramebuffer( renderContext ) {
+
+		const { gl } = this;
+
+		if ( renderContext.textures !== null ) {
+
+			const renderContextData = this.get( renderContext );
+
+			let fb = renderContextData.framebuffer;
+
+			if ( fb === undefined ) {
+
+				fb = gl.createFramebuffer();
+
+				gl.bindFramebuffer( gl.FRAMEBUFFER, fb );
+
+				const textures = renderContext.textures;
+
+				const drawBuffers = [];
+
+				for ( let i = 0; i < textures.length; i++ ) {
+
+					const texture = textures[ i ];
+					const { textureGPU } = this.get( texture );
+
+					const attachment = gl.COLOR_ATTACHMENT0 + i;
+
+					gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0 + i, gl.TEXTURE_2D, textureGPU, 0 );
+
+					drawBuffers.push( attachment );
+
+				}
+
+				gl.drawBuffers( drawBuffers );
+
+				if ( renderContext.depthTexture !== null ) {
+
+					const { textureGPU } = this.get( renderContext.depthTexture );
+
+					gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, textureGPU, 0 );
+
+				}
+
+				renderContextData.framebuffer = fb;
+
+			} else {
+
+				gl.bindFramebuffer( gl.FRAMEBUFFER, fb );
+
+			}
+
+		} else {
+
+			gl.bindFramebuffer( gl.FRAMEBUFFER, null );
+
+		}
+
+	}
+
+}
+
+export default WebGLBackend;