修改静态资源文件夹位置

public/sdk/three/jsm/renderers/webgl/WebGLBufferRenderer.js

@@ -0,0 +1,145 @@
+class WebGLBufferRenderer {
+
+	constructor( backend ) {
+
+		this.gl = backend.gl;
+		this.extensions = backend.extensions;
+		this.info = backend.renderer.info;
+		this.mode = null;
+		this.index = 0;
+		this.type = null;
+		this.object = null;
+
+	}
+
+	render( start, count ) {
+
+		const { gl, mode, object, type, info, index } = this;
+
+		if ( index !== 0 ) {
+
+			gl.drawElements( mode, count, type, start );
+
+		} else {
+
+			gl.drawArrays( mode, start, count );
+
+		}
+
+		info.update( object, count, mode, 1 );
+
+	}
+
+	renderInstances( start, count, primcount ) {
+
+		const { gl, mode, type, index, object, info } = this;
+
+		if ( primcount === 0 ) return;
+
+		if ( index !== 0 ) {
+
+			gl.drawElementsInstanced( mode, count, type, start, primcount );
+
+		} else {
+
+			gl.drawArraysInstanced( mode, start, count, primcount );
+
+		}
+
+		info.update( object, count, mode, primcount );
+
+	}
+
+	renderMultiDraw( starts, counts, drawCount ) {
+
+		const { extensions, mode, object, info } = this;
+
+		if ( drawCount === 0 ) return;
+
+		const extension = extensions.get( 'WEBGL_multi_draw' );
+
+		if ( extension === null ) {
+
+			for ( let i = 0; i < drawCount; i ++ ) {
+
+				this.render( starts[ i ], counts[ i ] );
+
+			}
+
+		} else {
+
+			if ( this.index !== 0 ) {
+
+				extension.multiDrawElementsWEBGL( mode, counts, 0, this.type, starts, 0, drawCount );
+
+			} else {
+
+				extension.multiDrawArraysWEBGL( mode, starts, 0, counts, 0, drawCount );
+
+			}
+
+			let elementCount = 0;
+			for ( let i = 0; i < drawCount; i ++ ) {
+
+				elementCount += counts[ i ];
+
+			}
+
+			info.update( object, elementCount, mode, 1 );
+
+		}
+
+	}
+
+	renderMultiDrawInstances( starts, counts, drawCount, primcount ) {
+
+		const { extensions, mode, object, info } = this;
+
+		if ( drawCount === 0 ) return;
+
+		const extension = extensions.get( 'WEBGL_multi_draw' );
+
+		if ( extension === null ) {
+
+			for ( let i = 0; i < drawCount; i ++ ) {
+
+				this.renderInstances( starts[ i ], counts[ i ], primcount[ i ] );
+
+			}
+
+		} else {
+
+			if ( this.index !== 0 ) {
+
+				extension.multiDrawElementsInstancedWEBGL( mode, counts, 0, this.type, starts, 0, primcount, 0, drawCount );
+
+			} else {
+
+				extension.multiDrawArraysInstancedWEBGL( mode, starts, 0, counts, 0, primcount, 0, drawCount );
+
+			}
+
+			let elementCount = 0;
+
+			for ( let i = 0; i < drawCount; i ++ ) {
+
+				elementCount += counts[ i ];
+
+			}
+
+			for ( let i = 0; i < primcount.length; i ++ ) {
+
+				info.update( object, elementCount, mode, primcount[ i ] );
+
+			}
+
+		}
+
+	}
+
+	//
+
+}
+
+
+export { WebGLBufferRenderer };

public/sdk/three/jsm/renderers/webgl/nodes/GLSLNodeBuilder.js

@@ -0,0 +1,810 @@
+import { MathNode, GLSLNodeParser, NodeBuilder, UniformNode, vectorComponents } from '../../../nodes/Nodes.js';
+
+import NodeUniformBuffer from '../../common/nodes/NodeUniformBuffer.js';
+import NodeUniformsGroup from '../../common/nodes/NodeUniformsGroup.js';
+
+import { NodeSampledTexture, NodeSampledCubeTexture } from '../../common/nodes/NodeSampledTexture.js';
+
+import { RedFormat, RGFormat, IntType, DataTexture, RGBFormat, RGBAFormat, FloatType } from 'three';
+
+const glslMethods = {
+	[ MathNode.ATAN2 ]: 'atan',
+	textureDimensions: 'textureSize',
+	equals: 'equal'
+};
+
+const precisionLib = {
+	low: 'lowp',
+	medium: 'mediump',
+	high: 'highp'
+};
+
+const supports = {
+	instance: true,
+	swizzleAssign: true
+};
+
+const defaultPrecisions = `
+precision highp float;
+precision highp int;
+precision mediump sampler2DArray;
+precision lowp sampler2DShadow;
+`;
+
+class GLSLNodeBuilder extends NodeBuilder {
+
+	constructor( object, renderer, scene = null ) {
+
+		super( object, renderer, new GLSLNodeParser(), scene );
+
+		this.uniformGroups = {};
+		this.transforms = [];
+
+	}
+
+	getMethod( method ) {
+
+		return glslMethods[ method ] || method;
+
+	}
+
+	getPropertyName( node, shaderStage ) {
+
+		if ( node.isOutputStructVar ) return '';
+
+		return super.getPropertyName( node, shaderStage );
+
+	}
+
+	buildFunctionCode( shaderNode ) {
+
+		const layout = shaderNode.layout;
+		const flowData = this.flowShaderNode( shaderNode );
+
+		const parameters = [];
+
+		for ( const input of layout.inputs ) {
+
+			parameters.push( this.getType( input.type ) + ' ' + input.name );
+
+		}
+
+		//
+
+		const code = `${ this.getType( layout.type ) } ${ layout.name }( ${ parameters.join( ', ' ) } ) {
+
+	${ flowData.vars }
+
+${ flowData.code }
+	return ${ flowData.result };
+
+}`;
+
+		//
+
+		return code;
+
+	}
+
+	setupPBO( storageBufferNode ) {
+
+		const attribute = storageBufferNode.value;
+
+		if ( attribute.pbo === undefined ) {
+
+			const originalArray = attribute.array;
+			const numElements = attribute.count * attribute.itemSize;
+
+			const { itemSize } = attribute;
+			let format = RedFormat;
+
+			if ( itemSize === 2 ) {
+
+				format = RGFormat;
+
+			} else if ( itemSize === 3 ) {
+
+				format = RGBFormat;
+
+			} else if ( itemSize === 4 ) {
+
+				format = RGBAFormat;
+
+			}
+
+			const width = Math.pow( 2, Math.ceil( Math.log2( Math.sqrt( numElements / itemSize ) ) ) );
+			let height = Math.ceil( ( numElements / itemSize ) / width );
+			if ( width * height * itemSize < numElements ) height ++; // Ensure enough space
+
+			const newSize = width * height * itemSize;
+
+			const newArray = new Float32Array( newSize );
+
+			newArray.set( originalArray, 0 );
+
+			attribute.array = newArray;
+
+			const pboTexture = new DataTexture( attribute.array, width, height, format, FloatType );
+			pboTexture.needsUpdate = true;
+			pboTexture.isPBOTexture = true;
+
+			const pbo = new UniformNode( pboTexture );
+			pbo.setPrecision( 'high' );
+
+			attribute.pboNode = pbo;
+			attribute.pbo = pbo.value;
+
+			this.getUniformFromNode( attribute.pboNode, 'texture', this.shaderStage, this.context.label );
+
+		}
+
+	}
+
+	generatePBO( storageArrayElementNode ) {
+
+		const { node, indexNode } = storageArrayElementNode;
+		const attribute = node.value;
+
+		if ( this.renderer.backend.has( attribute ) ) {
+
+			const attributeData = this.renderer.backend.get( attribute );
+			attributeData.pbo = attribute.pbo;
+
+		}
+
+
+		const nodeUniform = this.getUniformFromNode( attribute.pboNode, 'texture', this.shaderStage, this.context.label );
+		const textureName = this.getPropertyName( nodeUniform );
+
+		indexNode.increaseUsage( this ); // force cache generate to be used as index in x,y
+		const indexSnippet = indexNode.build( this, 'uint' );
+
+		const elementNodeData = this.getDataFromNode( storageArrayElementNode );
+
+		let propertyName = elementNodeData.propertyName;
+
+		if ( propertyName === undefined ) {
+
+			// property element
+
+			const nodeVar = this.getVarFromNode( storageArrayElementNode );
+
+			propertyName = this.getPropertyName( nodeVar );
+
+			// property size
+
+			const bufferNodeData = this.getDataFromNode( node );
+
+			let propertySizeName = bufferNodeData.propertySizeName;
+
+			if ( propertySizeName === undefined ) {
+
+				propertySizeName = propertyName + 'Size';
+
+				this.getVarFromNode( node, propertySizeName, 'uint' );
+
+				this.addLineFlowCode( `${ propertySizeName } = uint( textureSize( ${ textureName }, 0 ).x )` );
+
+				bufferNodeData.propertySizeName = propertySizeName;
+
+			}
+
+			//
+
+			const { itemSize } = attribute;
+
+			const channel = '.' + vectorComponents.join( '' ).slice( 0, itemSize );
+			const uvSnippet = `ivec2(${indexSnippet} % ${ propertySizeName }, ${indexSnippet} / ${ propertySizeName })`;
+
+			const snippet = this.generateTextureLoad( null, textureName, uvSnippet, null, '0' );
+
+			//
+
+			this.addLineFlowCode( `${ propertyName } = ${ snippet + channel }` );
+
+			elementNodeData.propertyName = propertyName;
+
+		}
+
+		return propertyName;
+
+	}
+
+	generateTextureLoad( texture, textureProperty, uvIndexSnippet, depthSnippet, levelSnippet = '0' ) {
+
+		if ( depthSnippet ) {
+
+			return `texelFetch( ${ textureProperty }, ivec3( ${ uvIndexSnippet }, ${ depthSnippet } ), ${ levelSnippet } )`;
+
+		} else {
+
+			return `texelFetch( ${ textureProperty }, ${ uvIndexSnippet }, ${ levelSnippet } )`;
+
+		}
+
+	}
+
+	generateTexture( texture, textureProperty, uvSnippet, depthSnippet ) {
+
+		if ( texture.isDepthTexture ) {
+
+			return `texture( ${ textureProperty }, ${ uvSnippet } ).x`;
+
+		} else {
+
+			if ( depthSnippet ) uvSnippet = `vec3( ${ uvSnippet }, ${ depthSnippet } )`;
+
+			return `texture( ${ textureProperty }, ${ uvSnippet } )`;
+
+		}
+
+	}
+
+	generateTextureLevel( texture, textureProperty, uvSnippet, levelSnippet ) {
+
+		return `textureLod( ${ textureProperty }, ${ uvSnippet }, ${ levelSnippet } )`;
+
+	}
+
+	generateTextureGrad( texture, textureProperty, uvSnippet, gradSnippet ) {
+
+		return `textureGrad( ${ textureProperty }, ${ uvSnippet }, ${ gradSnippet[ 0 ] }, ${ gradSnippet[ 1 ] } )`;
+
+	}
+
+	generateTextureCompare( texture, textureProperty, uvSnippet, compareSnippet, depthSnippet, shaderStage = this.shaderStage ) {
+
+		if ( shaderStage === 'fragment' ) {
+
+			return `texture( ${ textureProperty }, vec3( ${ uvSnippet }, ${ compareSnippet } ) )`;
+
+		} else {
+
+			console.error( `WebGPURenderer: THREE.DepthTexture.compareFunction() does not support ${ shaderStage } shader.` );
+
+		}
+
+	}
+
+	getVars( shaderStage ) {
+
+		const snippets = [];
+
+		const vars = this.vars[ shaderStage ];
+
+		if ( vars !== undefined ) {
+
+			for ( const variable of vars ) {
+
+				if ( variable.isOutputStructVar ) continue;
+
+				snippets.push( `${ this.getVar( variable.type, variable.name ) };` );
+
+			}
+
+		}
+
+		return snippets.join( '\n\t' );
+
+	}
+
+	getUniforms( shaderStage ) {
+
+		const uniforms = this.uniforms[ shaderStage ];
+
+		const bindingSnippets = [];
+		const uniformGroups = {};
+
+		for ( const uniform of uniforms ) {
+
+			let snippet = null;
+			let group = false;
+
+			if ( uniform.type === 'texture' ) {
+
+				const texture = uniform.node.value;
+
+				if ( texture.compareFunction ) {
+
+					snippet = `sampler2DShadow ${ uniform.name };`;
+
+				} else if ( texture.isDataArrayTexture === true ) {
+
+					snippet = `sampler2DArray ${ uniform.name };`;
+
+				} else {
+
+					snippet = `sampler2D ${ uniform.name };`;
+
+				}
+
+			} else if ( uniform.type === 'cubeTexture' ) {
+
+				snippet = `samplerCube ${ uniform.name };`;
+
+			} else if ( uniform.type === 'buffer' ) {
+
+				const bufferNode = uniform.node;
+				const bufferType = this.getType( bufferNode.bufferType );
+				const bufferCount = bufferNode.bufferCount;
+
+				const bufferCountSnippet = bufferCount > 0 ? bufferCount : '';
+				snippet = `${bufferNode.name} {\n\t${ bufferType } ${ uniform.name }[${ bufferCountSnippet }];\n};\n`;
+
+			} else {
+
+				const vectorType = this.getVectorType( uniform.type );
+
+				snippet = `${vectorType} ${uniform.name};`;
+
+				group = true;
+
+			}
+
+			const precision = uniform.node.precision;
+
+			if ( precision !== null ) {
+
+				snippet = precisionLib[ precision ] + ' ' + snippet;
+
+			}
+
+			if ( group ) {
+
+				snippet = '\t' + snippet;
+
+				const groupName = uniform.groupNode.name;
+				const groupSnippets = uniformGroups[ groupName ] || ( uniformGroups[ groupName ] = [] );
+
+				groupSnippets.push( snippet );
+
+			} else {
+
+				snippet = 'uniform ' + snippet;
+
+				bindingSnippets.push( snippet );
+
+			}
+
+		}
+
+		let output = '';
+
+		for ( const name in uniformGroups ) {
+
+			const groupSnippets = uniformGroups[ name ];
+
+			output += this._getGLSLUniformStruct( shaderStage + '_' + name, groupSnippets.join( '\n' ) ) + '\n';
+
+		}
+
+		output += bindingSnippets.join( '\n' );
+
+		return output;
+
+	}
+
+	getTypeFromAttribute( attribute ) {
+
+		let nodeType = super.getTypeFromAttribute( attribute );
+
+		if ( /^[iu]/.test( nodeType ) && attribute.gpuType !== IntType ) {
+
+			let dataAttribute = attribute;
+
+			if ( attribute.isInterleavedBufferAttribute ) dataAttribute = attribute.data;
+
+			const array = dataAttribute.array;
+
+			if ( ( array instanceof Uint32Array || array instanceof Int32Array || array instanceof Uint16Array || array instanceof Int16Array ) === false ) {
+
+				nodeType = nodeType.slice( 1 );
+
+			}
+
+		}
+
+		return nodeType;
+
+	}
+
+	getAttributes( shaderStage ) {
+
+		let snippet = '';
+
+		if ( shaderStage === 'vertex' || shaderStage === 'compute' ) {
+
+			const attributes = this.getAttributesArray();
+
+			let location = 0;
+
+			for ( const attribute of attributes ) {
+
+				snippet += `layout( location = ${ location ++ } ) in ${ attribute.type } ${ attribute.name };\n`;
+
+			}
+
+		}
+
+		return snippet;
+
+	}
+
+	getStructMembers( struct ) {
+
+		const snippets = [];
+		const members = struct.getMemberTypes();
+
+		for ( let i = 0; i < members.length; i ++ ) {
+
+			const member = members[ i ];
+			snippets.push( `layout( location = ${i} ) out ${ member} m${i};` );
+
+		}
+
+		return snippets.join( '\n' );
+
+	}
+
+	getStructs( shaderStage ) {
+
+		const snippets = [];
+		const structs = this.structs[ shaderStage ];
+
+		if ( structs.length === 0 ) {
+
+			return 'layout( location = 0 ) out vec4 fragColor;\n';
+
+		}
+
+		for ( let index = 0, length = structs.length; index < length; index ++ ) {
+
+			const struct = structs[ index ];
+
+			let snippet = '\n';
+			snippet += this.getStructMembers( struct );
+			snippet += '\n';
+
+			snippets.push( snippet );
+
+		}
+
+		return snippets.join( '\n\n' );
+
+	}
+
+	getVaryings( shaderStage ) {
+
+		let snippet = '';
+
+		const varyings = this.varyings;
+
+		if ( shaderStage === 'vertex' || shaderStage === 'compute' ) {
+
+			for ( const varying of varyings ) {
+
+				if ( shaderStage === 'compute' ) varying.needsInterpolation = true;
+				const type = varying.type;
+				const flat = type === 'int' || type === 'uint' ? 'flat ' : '';
+
+				snippet += `${flat}${varying.needsInterpolation ? 'out' : '/*out*/'} ${type} ${varying.name};\n`;
+
+			}
+
+		} else if ( shaderStage === 'fragment' ) {
+
+			for ( const varying of varyings ) {
+
+				if ( varying.needsInterpolation ) {
+
+					const type = varying.type;
+					const flat = type === 'int' || type === 'uint' ? 'flat ' : '';
+
+					snippet += `${flat}in ${type} ${varying.name};\n`;
+
+				}
+
+			}
+
+		}
+
+		return snippet;
+
+	}
+
+	getVertexIndex() {
+
+		return 'uint( gl_VertexID )';
+
+	}
+
+	getInstanceIndex() {
+
+		return 'uint( gl_InstanceID )';
+
+	}
+
+	getFrontFacing() {
+
+		return 'gl_FrontFacing';
+
+	}
+
+	getFragCoord() {
+
+		return 'gl_FragCoord';
+
+	}
+
+	getFragDepth() {
+
+		return 'gl_FragDepth';
+
+	}
+
+	isAvailable( name ) {
+
+		return supports[ name ] === true;
+
+	}
+
+	isFlipY() {
+
+		return true;
+
+	}
+
+	registerTransform( varyingName, attributeNode ) {
+
+		this.transforms.push( { varyingName, attributeNode } );
+
+	}
+
+	getTransforms( /* shaderStage  */ ) {
+
+		const transforms = this.transforms;
+
+		let snippet = '';
+
+		for ( let i = 0; i < transforms.length; i ++ ) {
+
+			const transform = transforms[ i ];
+
+			const attributeName = this.getPropertyName( transform.attributeNode );
+
+			snippet += `${ transform.varyingName } = ${ attributeName };\n\t`;
+
+		}
+
+		return snippet;
+
+	}
+
+	_getGLSLUniformStruct( name, vars ) {
+
+		return `
+layout( std140 ) uniform ${name} {
+${vars}
+};`;
+
+	}
+
+	_getGLSLVertexCode( shaderData ) {
+
+		return `#version 300 es
+
+${ this.getSignature() }
+
+// precision
+${ defaultPrecisions }
+
+// uniforms
+${shaderData.uniforms}
+
+// varyings
+${shaderData.varyings}
+
+// attributes
+${shaderData.attributes}
+
+// codes
+${shaderData.codes}
+
+void main() {
+
+	// vars
+	${shaderData.vars}
+
+	// transforms
+	${shaderData.transforms}
+
+	// flow
+	${shaderData.flow}
+
+	gl_PointSize = 1.0;
+
+}
+`;
+
+	}
+
+	_getGLSLFragmentCode( shaderData ) {
+
+		return `#version 300 es
+
+${ this.getSignature() }
+
+// precision
+${ defaultPrecisions }
+
+// uniforms
+${shaderData.uniforms}
+
+// varyings
+${shaderData.varyings}
+
+// codes
+${shaderData.codes}
+
+${shaderData.structs}
+
+void main() {
+
+	// vars
+	${shaderData.vars}
+
+	// flow
+	${shaderData.flow}
+
+}
+`;
+
+	}
+
+	buildCode() {
+
+		const shadersData = this.material !== null ? { fragment: {}, vertex: {} } : { compute: {} };
+
+		for ( const shaderStage in shadersData ) {
+
+			let flow = '// code\n\n';
+			flow += this.flowCode[ shaderStage ];
+
+			const flowNodes = this.flowNodes[ shaderStage ];
+			const mainNode = flowNodes[ flowNodes.length - 1 ];
+
+			for ( const node of flowNodes ) {
+
+				const flowSlotData = this.getFlowData( node/*, shaderStage*/ );
+				const slotName = node.name;
+
+				if ( slotName ) {
+
+					if ( flow.length > 0 ) flow += '\n';
+
+					flow += `\t// flow -> ${ slotName }\n\t`;
+
+				}
+
+				flow += `${ flowSlotData.code }\n\t`;
+
+				if ( node === mainNode && shaderStage !== 'compute' ) {
+
+					flow += '// result\n\t';
+
+					if ( shaderStage === 'vertex' ) {
+
+						flow += 'gl_Position = ';
+						flow += `${ flowSlotData.result };`;
+
+					} else if ( shaderStage === 'fragment' ) {
+
+						if ( ! node.outputNode.isOutputStructNode ) {
+
+							flow += 'fragColor = ';
+							flow += `${ flowSlotData.result };`;
+
+						}
+
+					}
+
+				}
+
+			}
+
+			const stageData = shadersData[ shaderStage ];
+
+			stageData.uniforms = this.getUniforms( shaderStage );
+			stageData.attributes = this.getAttributes( shaderStage );
+			stageData.varyings = this.getVaryings( shaderStage );
+			stageData.vars = this.getVars( shaderStage );
+			stageData.structs = this.getStructs( shaderStage );
+			stageData.codes = this.getCodes( shaderStage );
+			stageData.transforms = this.getTransforms( shaderStage );
+			stageData.flow = flow;
+
+		}
+
+		if ( this.material !== null ) {
+
+			this.vertexShader = this._getGLSLVertexCode( shadersData.vertex );
+			this.fragmentShader = this._getGLSLFragmentCode( shadersData.fragment );
+
+		} else {
+
+			this.computeShader = this._getGLSLVertexCode( shadersData.compute );
+
+		}
+
+	}
+
+	getUniformFromNode( node, type, shaderStage, name = null ) {
+
+		const uniformNode = super.getUniformFromNode( node, type, shaderStage, name );
+		const nodeData = this.getDataFromNode( node, shaderStage, this.globalCache );
+
+		let uniformGPU = nodeData.uniformGPU;
+
+		if ( uniformGPU === undefined ) {
+
+			if ( type === 'texture' ) {
+
+				uniformGPU = new NodeSampledTexture( uniformNode.name, uniformNode.node );
+
+				this.bindings[ shaderStage ].push( uniformGPU );
+
+			} else if ( type === 'cubeTexture' ) {
+
+				uniformGPU = new NodeSampledCubeTexture( uniformNode.name, uniformNode.node );
+
+				this.bindings[ shaderStage ].push( uniformGPU );
+
+			} else if ( type === 'buffer' ) {
+
+				node.name = `NodeBuffer_${ node.id }`;
+				uniformNode.name = `buffer${ node.id }`;
+
+				const buffer = new NodeUniformBuffer( node );
+				buffer.name = node.name;
+
+				this.bindings[ shaderStage ].push( buffer );
+
+				uniformGPU = buffer;
+
+			} else {
+
+				const group = node.groupNode;
+				const groupName = group.name;
+
+				const uniformsStage = this.uniformGroups[ shaderStage ] || ( this.uniformGroups[ shaderStage ] = {} );
+
+				let uniformsGroup = uniformsStage[ groupName ];
+
+				if ( uniformsGroup === undefined ) {
+
+					uniformsGroup = new NodeUniformsGroup( shaderStage + '_' + groupName, group );
+					//uniformsGroup.setVisibility( gpuShaderStageLib[ shaderStage ] );
+
+					uniformsStage[ groupName ] = uniformsGroup;
+
+					this.bindings[ shaderStage ].push( uniformsGroup );
+
+				}
+
+				uniformGPU = this.getNodeUniform( uniformNode, type );
+
+				uniformsGroup.addUniform( uniformGPU );
+
+			}
+
+			nodeData.uniformGPU = uniformGPU;
+
+		}
+
+		return uniformNode;
+
+	}
+
+}
+
+export default GLSLNodeBuilder;

public/sdk/three/jsm/renderers/webgl/utils/WebGLAttributeUtils.js

@@ -0,0 +1,258 @@
+import { IntType } from 'three';
+
+let _id = 0;
+
+class DualAttributeData {
+
+	constructor( attributeData, dualBuffer ) {
+
+		this.buffers = [ attributeData.bufferGPU, dualBuffer ];
+		this.type = attributeData.type;
+		this.bufferType = attributeData.bufferType;
+		this.pbo = attributeData.pbo;
+		this.byteLength = attributeData.byteLength;
+		this.bytesPerElement = attributeData.BYTES_PER_ELEMENT;
+		this.version = attributeData.version;
+		this.isInteger = attributeData.isInteger;
+		this.activeBufferIndex = 0;
+		this.baseId = attributeData.id;
+
+	}
+
+
+	get id() {
+
+		return `${ this.baseId }|${ this.activeBufferIndex }`;
+
+	}
+
+	get bufferGPU() {
+
+		return this.buffers[ this.activeBufferIndex ];
+
+	}
+
+	get transformBuffer() {
+
+		return this.buffers[ this.activeBufferIndex ^ 1 ];
+
+	}
+
+	switchBuffers() {
+
+		this.activeBufferIndex ^= 1;
+
+	}
+
+}
+
+class WebGLAttributeUtils {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+	}
+
+	createAttribute( attribute, bufferType ) {
+
+		const backend = this.backend;
+		const { gl } = backend;
+
+		const array = attribute.array;
+		const usage = attribute.usage || gl.STATIC_DRAW;
+
+		const bufferAttribute = attribute.isInterleavedBufferAttribute ? attribute.data : attribute;
+		const bufferData = backend.get( bufferAttribute );
+
+		let bufferGPU = bufferData.bufferGPU;
+
+		if ( bufferGPU === undefined ) {
+
+			bufferGPU = this._createBuffer( gl, bufferType, array, usage );
+
+			bufferData.bufferGPU = bufferGPU;
+			bufferData.bufferType = bufferType;
+			bufferData.version = bufferAttribute.version;
+
+		}
+
+		//attribute.onUploadCallback();
+
+		let type;
+
+		if ( array instanceof Float32Array ) {
+
+			type = gl.FLOAT;
+
+		} else if ( array instanceof Uint16Array ) {
+
+			if ( attribute.isFloat16BufferAttribute ) {
+
+				type = gl.HALF_FLOAT;
+
+			} else {
+
+				type = gl.UNSIGNED_SHORT;
+
+			}
+
+		} else if ( array instanceof Int16Array ) {
+
+			type = gl.SHORT;
+
+		} else if ( array instanceof Uint32Array ) {
+
+			type = gl.UNSIGNED_INT;
+
+		} else if ( array instanceof Int32Array ) {
+
+			type = gl.INT;
+
+		} else if ( array instanceof Int8Array ) {
+
+			type = gl.BYTE;
+
+		} else if ( array instanceof Uint8Array ) {
+
+			type = gl.UNSIGNED_BYTE;
+
+		} else if ( array instanceof Uint8ClampedArray ) {
+
+			type = gl.UNSIGNED_BYTE;
+
+		} else {
+
+			throw new Error( 'THREE.WebGLBackend: Unsupported buffer data format: ' + array );
+
+		}
+
+		let attributeData = {
+			bufferGPU,
+			bufferType,
+			type,
+			byteLength: array.byteLength,
+			bytesPerElement: array.BYTES_PER_ELEMENT,
+			version: attribute.version,
+			pbo: attribute.pbo,
+			isInteger: type === gl.INT || type === gl.UNSIGNED_INT || type === gl.UNSIGNED_SHORT || attribute.gpuType === IntType,
+			id: _id ++
+		};
+
+		if ( attribute.isStorageBufferAttribute || attribute.isStorageInstancedBufferAttribute ) {
+
+			// create buffer for tranform feedback use
+			const bufferGPUDual = this._createBuffer( gl, bufferType, array, usage );
+			attributeData = new DualAttributeData( attributeData, bufferGPUDual );
+
+		}
+
+		backend.set( attribute, attributeData );
+
+	}
+
+	updateAttribute( attribute ) {
+
+		const backend = this.backend;
+		const { gl } = backend;
+
+		const array = attribute.array;
+		const bufferAttribute = attribute.isInterleavedBufferAttribute ? attribute.data : attribute;
+		const bufferData = backend.get( bufferAttribute );
+		const bufferType = bufferData.bufferType;
+		const updateRanges = attribute.isInterleavedBufferAttribute ? attribute.data.updateRanges : attribute.updateRanges;
+
+		gl.bindBuffer( bufferType, bufferData.bufferGPU );
+
+		if ( updateRanges.length === 0 ) {
+
+			// Not using update ranges
+
+			gl.bufferSubData( bufferType, 0, array );
+
+		} else {
+
+			for ( let i = 0, l = updateRanges.length; i < l; i ++ ) {
+
+				const range = updateRanges[ i ];
+				gl.bufferSubData( bufferType, range.start * array.BYTES_PER_ELEMENT,
+					array, range.start, range.count );
+
+			}
+
+			bufferAttribute.clearUpdateRanges();
+
+		}
+
+		gl.bindBuffer( bufferType, null );
+
+		bufferData.version = bufferAttribute.version;
+
+	}
+
+	destroyAttribute( attribute ) {
+
+		const backend = this.backend;
+		const { gl } = backend;
+
+		if ( attribute.isInterleavedBufferAttribute ) {
+
+			backend.delete( attribute.data );
+
+		}
+
+		const attributeData = backend.get( attribute );
+
+		gl.deleteBuffer( attributeData.bufferGPU );
+
+		backend.delete( attribute );
+
+	}
+
+	async getArrayBufferAsync( attribute ) {
+
+		const backend = this.backend;
+		const { gl } = backend;
+
+		const bufferAttribute = attribute.isInterleavedBufferAttribute ? attribute.data : attribute;
+		const { bufferGPU } = backend.get( bufferAttribute );
+
+		const array = attribute.array;
+		const byteLength = array.byteLength;
+
+		gl.bindBuffer( gl.COPY_READ_BUFFER, bufferGPU );
+
+		const writeBuffer = gl.createBuffer();
+
+		gl.bindBuffer( gl.COPY_WRITE_BUFFER, writeBuffer );
+		gl.bufferData( gl.COPY_WRITE_BUFFER, byteLength, gl.STREAM_READ );
+
+		gl.copyBufferSubData( gl.COPY_READ_BUFFER, gl.COPY_WRITE_BUFFER, 0, 0, byteLength );
+
+		await backend.utils._clientWaitAsync();
+
+		const dstBuffer = new attribute.array.constructor( array.length );
+
+		gl.getBufferSubData( gl.COPY_WRITE_BUFFER, 0, dstBuffer );
+
+		gl.deleteBuffer( writeBuffer );
+
+		return dstBuffer.buffer;
+
+	}
+
+	_createBuffer( gl, bufferType, array, usage ) {
+
+		const bufferGPU = gl.createBuffer();
+
+		gl.bindBuffer( bufferType, bufferGPU );
+		gl.bufferData( bufferType, array, usage );
+		gl.bindBuffer( bufferType, null );
+
+		return bufferGPU;
+
+	}
+
+}
+
+export default WebGLAttributeUtils;

public/sdk/three/jsm/renderers/webgl/utils/WebGLCapabilities.js

@@ -0,0 +1,36 @@
+class WebGLCapabilities {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+		this.maxAnisotropy = null;
+
+	}
+
+	getMaxAnisotropy() {
+
+		if ( this.maxAnisotropy !== null ) return this.maxAnisotropy;
+
+		const gl = this.backend.gl;
+		const extensions = this.backend.extensions;
+
+		if ( extensions.has( 'EXT_texture_filter_anisotropic' ) === true ) {
+
+			const extension = extensions.get( 'EXT_texture_filter_anisotropic' );
+
+			this.maxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );
+
+		} else {
+
+			this.maxAnisotropy = 0;
+
+		}
+
+		return this.maxAnisotropy;
+
+	}
+
+}
+
+export default WebGLCapabilities;

public/sdk/three/jsm/renderers/webgl/utils/WebGLConstants.js

@@ -0,0 +1,12 @@
+export const GLFeatureName = {
+
+	'WEBGL_compressed_texture_astc': 'texture-compression-astc',
+	'WEBGL_compressed_texture_etc': 'texture-compression-etc2',
+	'WEBGL_compressed_texture_etc1': 'texture-compression-etc1',
+	'WEBGL_compressed_texture_pvrtc': 'texture-compression-pvrtc',
+	'WEBKIT_WEBGL_compressed_texture_pvrtc': 'texture-compression-pvrtc',
+	'WEBGL_compressed_texture_s3tc': 'texture-compression-bc',
+	'EXT_texture_compression_bptc': 'texture-compression-bptc',
+	'EXT_disjoint_timer_query_webgl2': 'timestamp-query',
+
+};

public/sdk/three/jsm/renderers/webgl/utils/WebGLExtensions.js

@@ -0,0 +1,36 @@
+class WebGLExtensions {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+		this.gl = this.backend.gl;
+		this.availableExtensions = this.gl.getSupportedExtensions();
+
+		this.extensions = {};
+
+	}
+
+	get( name ) {
+
+		let extension = this.extensions[ name ];
+
+		if ( extension === undefined ) {
+
+			extension = this.gl.getExtension( name );
+
+		}
+
+		return extension;
+
+	}
+
+	has( name ) {
+
+		return this.availableExtensions.includes( name );
+
+	}
+
+}
+
+export default WebGLExtensions;

public/sdk/three/jsm/renderers/webgl/utils/WebGLState.js

@@ -0,0 +1,738 @@
+import {
+	CullFaceNone, CullFaceBack, CullFaceFront, DoubleSide, BackSide,
+	NormalBlending, NoBlending, CustomBlending, AddEquation,
+	AdditiveBlending, SubtractiveBlending, MultiplyBlending, SubtractEquation, ReverseSubtractEquation,
+	ZeroFactor, OneFactor, SrcColorFactor, SrcAlphaFactor, SrcAlphaSaturateFactor, DstColorFactor, DstAlphaFactor,
+	OneMinusSrcColorFactor, OneMinusSrcAlphaFactor, OneMinusDstColorFactor, OneMinusDstAlphaFactor,
+	NeverDepth, AlwaysDepth, LessDepth, LessEqualDepth, EqualDepth, GreaterEqualDepth, GreaterDepth, NotEqualDepth
+} from 'three';
+
+let initialized = false, equationToGL, factorToGL;
+
+class WebGLState {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+		this.gl = this.backend.gl;
+
+		this.enabled = {};
+		this.currentFlipSided = null;
+		this.currentCullFace = null;
+		this.currentProgram = null;
+		this.currentBlendingEnabled = false;
+		this.currentBlending = null;
+		this.currentBlendSrc = null;
+		this.currentBlendDst = null;
+		this.currentBlendSrcAlpha = null;
+		this.currentBlendDstAlpha = null;
+		this.currentPremultipledAlpha = null;
+		this.currentPolygonOffsetFactor = null;
+		this.currentPolygonOffsetUnits = null;
+		this.currentColorMask = null;
+		this.currentDepthFunc = null;
+		this.currentDepthMask = null;
+		this.currentStencilFunc = null;
+		this.currentStencilRef = null;
+		this.currentStencilFuncMask = null;
+		this.currentStencilFail = null;
+		this.currentStencilZFail = null;
+		this.currentStencilZPass = null;
+		this.currentStencilMask = null;
+		this.currentLineWidth = null;
+
+		this.currentBoundFramebuffers = {};
+		this.currentDrawbuffers = new WeakMap();
+
+		this.maxTextures = this.gl.getParameter( this.gl.MAX_TEXTURE_IMAGE_UNITS );
+		this.currentTextureSlot = null;
+		this.currentBoundTextures = {};
+
+		if ( initialized === false ) {
+
+			this._init( this.gl );
+
+			initialized = true;
+
+		}
+
+	}
+
+	_init( gl ) {
+
+		// Store only WebGL constants here.
+
+		equationToGL = {
+			[ AddEquation ]: gl.FUNC_ADD,
+			[ SubtractEquation ]: gl.FUNC_SUBTRACT,
+			[ ReverseSubtractEquation ]: gl.FUNC_REVERSE_SUBTRACT
+		};
+
+		factorToGL = {
+			[ ZeroFactor ]: gl.ZERO,
+			[ OneFactor ]: gl.ONE,
+			[ SrcColorFactor ]: gl.SRC_COLOR,
+			[ SrcAlphaFactor ]: gl.SRC_ALPHA,
+			[ SrcAlphaSaturateFactor ]: gl.SRC_ALPHA_SATURATE,
+			[ DstColorFactor ]: gl.DST_COLOR,
+			[ DstAlphaFactor ]: gl.DST_ALPHA,
+			[ OneMinusSrcColorFactor ]: gl.ONE_MINUS_SRC_COLOR,
+			[ OneMinusSrcAlphaFactor ]: gl.ONE_MINUS_SRC_ALPHA,
+			[ OneMinusDstColorFactor ]: gl.ONE_MINUS_DST_COLOR,
+			[ OneMinusDstAlphaFactor ]: gl.ONE_MINUS_DST_ALPHA
+		};
+
+	}
+
+	enable( id ) {
+
+		const { enabled } = this;
+
+		if ( enabled[ id ] !== true ) {
+
+			this.gl.enable( id );
+			enabled[ id ] = true;
+
+		}
+
+	}
+
+	disable( id ) {
+
+		const { enabled } = this;
+
+		if ( enabled[ id ] !== false ) {
+
+			this.gl.disable( id );
+			enabled[ id ] = false;
+
+		}
+
+	}
+
+	setFlipSided( flipSided ) {
+
+		if ( this.currentFlipSided !== flipSided ) {
+
+			const { gl } = this;
+
+			if ( flipSided ) {
+
+				gl.frontFace( gl.CW );
+
+			} else {
+
+				gl.frontFace( gl.CCW );
+
+			}
+
+			this.currentFlipSided = flipSided;
+
+		}
+
+	}
+
+	setCullFace( cullFace ) {
+
+		const { gl } = this;
+
+		if ( cullFace !== CullFaceNone ) {
+
+			this.enable( gl.CULL_FACE );
+
+			if ( cullFace !== this.currentCullFace ) {
+
+				if ( cullFace === CullFaceBack ) {
+
+					gl.cullFace( gl.BACK );
+
+				} else if ( cullFace === CullFaceFront ) {
+
+					gl.cullFace( gl.FRONT );
+
+				} else {
+
+					gl.cullFace( gl.FRONT_AND_BACK );
+
+				}
+
+			}
+
+		} else {
+
+			this.disable( gl.CULL_FACE );
+
+		}
+
+		this.currentCullFace = cullFace;
+
+	}
+
+	setLineWidth( width ) {
+
+		const { currentLineWidth, gl } = this;
+
+		if ( width !== currentLineWidth ) {
+
+			gl.lineWidth( width );
+
+			this.currentLineWidth = width;
+
+		}
+
+	}
+
+
+	setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {
+
+		const { gl } = this;
+
+		if ( blending === NoBlending ) {
+
+			if ( this.currentBlendingEnabled === true ) {
+
+				this.disable( gl.BLEND );
+				this.currentBlendingEnabled = false;
+
+			}
+
+			return;
+
+		}
+
+		if ( this.currentBlendingEnabled === false ) {
+
+			this.enable( gl.BLEND );
+			this.currentBlendingEnabled = true;
+
+		}
+
+		if ( blending !== CustomBlending ) {
+
+			if ( blending !== this.currentBlending || premultipliedAlpha !== this.currentPremultipledAlpha ) {
+
+				if ( this.currentBlendEquation !== AddEquation || this.currentBlendEquationAlpha !== AddEquation ) {
+
+					gl.blendEquation( gl.FUNC_ADD );
+
+					this.currentBlendEquation = AddEquation;
+					this.currentBlendEquationAlpha = AddEquation;
+
+				}
+
+				if ( premultipliedAlpha ) {
+
+					switch ( blending ) {
+
+						case NormalBlending:
+							gl.blendFuncSeparate( gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );
+							break;
+
+						case AdditiveBlending:
+							gl.blendFunc( gl.ONE, gl.ONE );
+							break;
+
+						case SubtractiveBlending:
+							gl.blendFuncSeparate( gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE );
+							break;
+
+						case MultiplyBlending:
+							gl.blendFuncSeparate( gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA );
+							break;
+
+						default:
+							console.error( 'THREE.WebGLState: Invalid blending: ', blending );
+							break;
+
+					}
+
+				} else {
+
+					switch ( blending ) {
+
+						case NormalBlending:
+							gl.blendFuncSeparate( gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );
+							break;
+
+						case AdditiveBlending:
+							gl.blendFunc( gl.SRC_ALPHA, gl.ONE );
+							break;
+
+						case SubtractiveBlending:
+							gl.blendFuncSeparate( gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE );
+							break;
+
+						case MultiplyBlending:
+							gl.blendFunc( gl.ZERO, gl.SRC_COLOR );
+							break;
+
+						default:
+							console.error( 'THREE.WebGLState: Invalid blending: ', blending );
+							break;
+
+					}
+
+				}
+
+				this.currentBlendSrc = null;
+				this.currentBlendDst = null;
+				this.currentBlendSrcAlpha = null;
+				this.currentBlendDstAlpha = null;
+
+				this.currentBlending = blending;
+				this.currentPremultipledAlpha = premultipliedAlpha;
+
+			}
+
+			return;
+
+		}
+
+		// custom blending
+
+		blendEquationAlpha = blendEquationAlpha || blendEquation;
+		blendSrcAlpha = blendSrcAlpha || blendSrc;
+		blendDstAlpha = blendDstAlpha || blendDst;
+
+		if ( blendEquation !== this.currentBlendEquation || blendEquationAlpha !== this.currentBlendEquationAlpha ) {
+
+			gl.blendEquationSeparate( equationToGL[ blendEquation ], equationToGL[ blendEquationAlpha ] );
+
+			this.currentBlendEquation = blendEquation;
+			this.currentBlendEquationAlpha = blendEquationAlpha;
+
+		}
+
+		if ( blendSrc !== this.currentBlendSrc || blendDst !== this.currentBlendDst || blendSrcAlpha !== this.currentBlendSrcAlpha || blendDstAlpha !== this.currentBlendDstAlpha ) {
+
+			gl.blendFuncSeparate( factorToGL[ blendSrc ], factorToGL[ blendDst ], factorToGL[ blendSrcAlpha ], factorToGL[ blendDstAlpha ] );
+
+			this.currentBlendSrc = blendSrc;
+			this.currentBlendDst = blendDst;
+			this.currentBlendSrcAlpha = blendSrcAlpha;
+			this.currentBlendDstAlpha = blendDstAlpha;
+
+		}
+
+		this.currentBlending = blending;
+		this.currentPremultipledAlpha = false;
+
+	}
+
+	setColorMask( colorMask ) {
+
+		if ( this.currentColorMask !== colorMask ) {
+
+			this.gl.colorMask( colorMask, colorMask, colorMask, colorMask );
+			this.currentColorMask = colorMask;
+
+		}
+
+	}
+
+	setDepthTest( depthTest ) {
+
+		const { gl } = this;
+
+		if ( depthTest ) {
+
+			this.enable( gl.DEPTH_TEST );
+
+		} else {
+
+			this.disable( gl.DEPTH_TEST );
+
+		}
+
+	}
+
+	setDepthMask( depthMask ) {
+
+		if ( this.currentDepthMask !== depthMask ) {
+
+			this.gl.depthMask( depthMask );
+			this.currentDepthMask = depthMask;
+
+		}
+
+	}
+
+	setDepthFunc( depthFunc ) {
+
+		if ( this.currentDepthFunc !== depthFunc ) {
+
+			const { gl } = this;
+
+			switch ( depthFunc ) {
+
+				case NeverDepth:
+
+					gl.depthFunc( gl.NEVER );
+					break;
+
+				case AlwaysDepth:
+
+					gl.depthFunc( gl.ALWAYS );
+					break;
+
+				case LessDepth:
+
+					gl.depthFunc( gl.LESS );
+					break;
+
+				case LessEqualDepth:
+
+					gl.depthFunc( gl.LEQUAL );
+					break;
+
+				case EqualDepth:
+
+					gl.depthFunc( gl.EQUAL );
+					break;
+
+				case GreaterEqualDepth:
+
+					gl.depthFunc( gl.GEQUAL );
+					break;
+
+				case GreaterDepth:
+
+					gl.depthFunc( gl.GREATER );
+					break;
+
+				case NotEqualDepth:
+
+					gl.depthFunc( gl.NOTEQUAL );
+					break;
+
+				default:
+
+					gl.depthFunc( gl.LEQUAL );
+
+			}
+
+			this.currentDepthFunc = depthFunc;
+
+		}
+
+	}
+
+	setStencilTest( stencilTest ) {
+
+		const { gl } = this;
+
+		if ( stencilTest ) {
+
+			this.enable( gl.STENCIL_TEST );
+
+		} else {
+
+			this.disable( gl.STENCIL_TEST );
+
+		}
+
+	}
+
+	setStencilMask( stencilMask ) {
+
+		if ( this.currentStencilMask !== stencilMask ) {
+
+			this.gl.stencilMask( stencilMask );
+			this.currentStencilMask = stencilMask;
+
+		}
+
+	}
+
+	setStencilFunc( stencilFunc, stencilRef, stencilMask ) {
+
+		if ( this.currentStencilFunc !== stencilFunc ||
+			 this.currentStencilRef !== stencilRef ||
+			 this.currentStencilFuncMask !== stencilMask ) {
+
+			this.gl.stencilFunc( stencilFunc, stencilRef, stencilMask );
+
+			this.currentStencilFunc = stencilFunc;
+			this.currentStencilRef = stencilRef;
+			this.currentStencilFuncMask = stencilMask;
+
+		}
+
+	}
+
+	setStencilOp( stencilFail, stencilZFail, stencilZPass ) {
+
+		if ( this.currentStencilFail !== stencilFail ||
+			 this.currentStencilZFail !== stencilZFail ||
+			 this.currentStencilZPass !== stencilZPass ) {
+
+			this.gl.stencilOp( stencilFail, stencilZFail, stencilZPass );
+
+			this.currentStencilFail = stencilFail;
+			this.currentStencilZFail = stencilZFail;
+			this.currentStencilZPass = stencilZPass;
+
+		}
+
+	}
+
+	setMaterial( material, frontFaceCW ) {
+
+		const { gl } = this;
+
+		material.side === DoubleSide
+			? this.disable( gl.CULL_FACE )
+			: this.enable( gl.CULL_FACE );
+
+		let flipSided = ( material.side === BackSide );
+		if ( frontFaceCW ) flipSided = ! flipSided;
+
+		this.setFlipSided( flipSided );
+
+		( material.blending === NormalBlending && material.transparent === false )
+			? this.setBlending( NoBlending )
+			: this.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );
+
+		this.setDepthFunc( material.depthFunc );
+		this.setDepthTest( material.depthTest );
+		this.setDepthMask( material.depthWrite );
+		this.setColorMask( material.colorWrite );
+
+		const stencilWrite = material.stencilWrite;
+		this.setStencilTest( stencilWrite );
+		if ( stencilWrite ) {
+
+			this.setStencilMask( material.stencilWriteMask );
+			this.setStencilFunc( material.stencilFunc, material.stencilRef, material.stencilFuncMask );
+			this.setStencilOp( material.stencilFail, material.stencilZFail, material.stencilZPass );
+
+		}
+
+		this.setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );
+
+		material.alphaToCoverage === true
+			? this.enable( gl.SAMPLE_ALPHA_TO_COVERAGE )
+			: this.disable( gl.SAMPLE_ALPHA_TO_COVERAGE );
+
+	}
+
+	setPolygonOffset( polygonOffset, factor, units ) {
+
+		const { gl } = this;
+
+		if ( polygonOffset ) {
+
+			this.enable( gl.POLYGON_OFFSET_FILL );
+
+			if ( this.currentPolygonOffsetFactor !== factor || this.currentPolygonOffsetUnits !== units ) {
+
+				gl.polygonOffset( factor, units );
+
+				this.currentPolygonOffsetFactor = factor;
+				this.currentPolygonOffsetUnits = units;
+
+			}
+
+		} else {
+
+			this.disable( gl.POLYGON_OFFSET_FILL );
+
+		}
+
+	}
+
+	useProgram( program ) {
+
+		if ( this.currentProgram !== program ) {
+
+			this.gl.useProgram( program );
+
+			this.currentProgram = program;
+
+			return true;
+
+		}
+
+		return false;
+
+	}
+
+	// framebuffer
+
+
+	bindFramebuffer( target, framebuffer ) {
+
+		const { gl, currentBoundFramebuffers } = this;
+
+		if ( currentBoundFramebuffers[ target ] !== framebuffer ) {
+
+			gl.bindFramebuffer( target, framebuffer );
+
+			currentBoundFramebuffers[ target ] = framebuffer;
+
+			// gl.DRAW_FRAMEBUFFER is equivalent to gl.FRAMEBUFFER
+
+			if ( target === gl.DRAW_FRAMEBUFFER ) {
+
+				currentBoundFramebuffers[ gl.FRAMEBUFFER ] = framebuffer;
+
+			}
+
+			if ( target === gl.FRAMEBUFFER ) {
+
+				currentBoundFramebuffers[ gl.DRAW_FRAMEBUFFER ] = framebuffer;
+
+			}
+
+			return true;
+
+		}
+
+		return false;
+
+	}
+
+	drawBuffers( renderContext, framebuffer ) {
+
+		const { gl } = this;
+
+		let drawBuffers = [];
+
+		let needsUpdate = false;
+
+		if ( renderContext.textures !== null ) {
+
+			drawBuffers = this.currentDrawbuffers.get( framebuffer );
+
+			if ( drawBuffers === undefined ) {
+
+				drawBuffers = [];
+				this.currentDrawbuffers.set( framebuffer, drawBuffers );
+
+			}
+
+
+			const textures = renderContext.textures;
+
+			if ( drawBuffers.length !== textures.length || drawBuffers[ 0 ] !== gl.COLOR_ATTACHMENT0 ) {
+
+				for ( let i = 0, il = textures.length; i < il; i ++ ) {
+
+					drawBuffers[ i ] = gl.COLOR_ATTACHMENT0 + i;
+
+				}
+
+				drawBuffers.length = textures.length;
+
+				needsUpdate = true;
+
+			}
+
+
+		} else {
+
+			if ( drawBuffers[ 0 ] !== gl.BACK ) {
+
+				drawBuffers[ 0 ] = gl.BACK;
+
+				needsUpdate = true;
+
+			}
+
+		}
+
+		if ( needsUpdate ) {
+
+			gl.drawBuffers( drawBuffers );
+
+		}
+
+
+	}
+
+
+	// texture
+
+	activeTexture( webglSlot ) {
+
+		const { gl, currentTextureSlot, maxTextures } = this;
+
+		if ( webglSlot === undefined ) webglSlot = gl.TEXTURE0 + maxTextures - 1;
+
+		if ( currentTextureSlot !== webglSlot ) {
+
+			gl.activeTexture( webglSlot );
+			this.currentTextureSlot = webglSlot;
+
+		}
+
+	}
+
+	bindTexture( webglType, webglTexture, webglSlot ) {
+
+		const { gl, currentTextureSlot, currentBoundTextures, maxTextures } = this;
+
+		if ( webglSlot === undefined ) {
+
+			if ( currentTextureSlot === null ) {
+
+				webglSlot = gl.TEXTURE0 + maxTextures - 1;
+
+			} else {
+
+				webglSlot = currentTextureSlot;
+
+			}
+
+		}
+
+		let boundTexture = currentBoundTextures[ webglSlot ];
+
+		if ( boundTexture === undefined ) {
+
+			boundTexture = { type: undefined, texture: undefined };
+			currentBoundTextures[ webglSlot ] = boundTexture;
+
+		}
+
+		if ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {
+
+			if ( currentTextureSlot !== webglSlot ) {
+
+				gl.activeTexture( webglSlot );
+				this.currentTextureSlot = webglSlot;
+
+			}
+
+			gl.bindTexture( webglType, webglTexture );
+
+			boundTexture.type = webglType;
+			boundTexture.texture = webglTexture;
+
+
+		}
+
+
+	}
+
+	unbindTexture() {
+
+		const { gl, currentTextureSlot, currentBoundTextures } = this;
+
+		const boundTexture = currentBoundTextures[ currentTextureSlot ];
+
+		if ( boundTexture !== undefined && boundTexture.type !== undefined ) {
+
+			gl.bindTexture( boundTexture.type, null );
+
+			boundTexture.type = undefined;
+			boundTexture.texture = undefined;
+
+		}
+
+	}
+
+}
+
+export default WebGLState;

public/sdk/three/jsm/renderers/webgl/utils/WebGLTextureUtils.js

@@ -0,0 +1,751 @@
+import { LinearFilter, LinearMipmapLinearFilter, LinearMipmapNearestFilter, NearestFilter, NearestMipmapLinearFilter, NearestMipmapNearestFilter, FloatType, MirroredRepeatWrapping, ClampToEdgeWrapping, RepeatWrapping, SRGBColorSpace, NeverCompare, AlwaysCompare, LessCompare, LessEqualCompare, EqualCompare, GreaterEqualCompare, GreaterCompare, NotEqualCompare } from 'three';
+
+let initialized = false, wrappingToGL, filterToGL, compareToGL;
+
+class WebGLTextureUtils {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+		this.gl = backend.gl;
+		this.extensions = backend.extensions;
+		this.defaultTextures = {};
+
+		if ( initialized === false ) {
+
+			this._init( this.gl );
+
+			initialized = true;
+
+		}
+
+	}
+
+	_init( gl ) {
+
+		// Store only WebGL constants here.
+
+		wrappingToGL = {
+			[ RepeatWrapping ]: gl.REPEAT,
+			[ ClampToEdgeWrapping ]: gl.CLAMP_TO_EDGE,
+			[ MirroredRepeatWrapping ]: gl.MIRRORED_REPEAT
+		};
+
+		filterToGL = {
+			[ NearestFilter ]: gl.NEAREST,
+			[ NearestMipmapNearestFilter ]: gl.NEAREST_MIPMAP_NEAREST,
+			[ NearestMipmapLinearFilter ]: gl.NEAREST_MIPMAP_LINEAR,
+
+			[ LinearFilter ]: gl.LINEAR,
+			[ LinearMipmapNearestFilter ]: gl.LINEAR_MIPMAP_NEAREST,
+			[ LinearMipmapLinearFilter ]: gl.LINEAR_MIPMAP_LINEAR
+		};
+
+		compareToGL = {
+			[ NeverCompare ]: gl.NEVER,
+			[ AlwaysCompare ]: gl.ALWAYS,
+			[ LessCompare ]: gl.LESS,
+			[ LessEqualCompare ]: gl.LEQUAL,
+			[ EqualCompare ]: gl.EQUAL,
+			[ GreaterEqualCompare ]: gl.GEQUAL,
+			[ GreaterCompare ]: gl.GREATER,
+			[ NotEqualCompare ]: gl.NOTEQUAL
+		};
+
+	}
+
+	filterFallback( f ) {
+
+		const { gl } = this;
+
+		if ( f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter ) {
+
+			return gl.NEAREST;
+
+		}
+
+		return gl.LINEAR;
+
+	}
+
+	getGLTextureType( texture ) {
+
+		const { gl } = this;
+
+		let glTextureType;
+
+		if ( texture.isCubeTexture === true ) {
+
+			glTextureType = gl.TEXTURE_CUBE_MAP;
+
+		} else if ( texture.isDataArrayTexture === true ) {
+
+			glTextureType = gl.TEXTURE_2D_ARRAY;
+
+		} else {
+
+			glTextureType = gl.TEXTURE_2D;
+
+
+		}
+
+		return glTextureType;
+
+	}
+
+	getInternalFormat( internalFormatName, glFormat, glType, colorSpace, forceLinearTransfer = false ) {
+
+		const { gl, extensions } = this;
+
+		if ( internalFormatName !== null ) {
+
+			if ( gl[ internalFormatName ] !== undefined ) return gl[ internalFormatName ];
+
+			console.warn( 'THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \'' + internalFormatName + '\'' );
+
+		}
+
+		let internalFormat = glFormat;
+
+		if ( glFormat === gl.RED ) {
+
+			if ( glType === gl.FLOAT ) internalFormat = gl.R32F;
+			if ( glType === gl.HALF_FLOAT ) internalFormat = gl.R16F;
+			if ( glType === gl.UNSIGNED_BYTE ) internalFormat = gl.R8;
+
+		}
+
+		if ( glFormat === gl.RED_INTEGER ) {
+
+			if ( glType === gl.UNSIGNED_BYTE ) internalFormat = gl.R8UI;
+			if ( glType === gl.UNSIGNED_SHORT ) internalFormat = gl.R16UI;
+			if ( glType === gl.UNSIGNED_INT ) internalFormat = gl.R32UI;
+			if ( glType === gl.BYTE ) internalFormat = gl.R8I;
+			if ( glType === gl.SHORT ) internalFormat = gl.R16I;
+			if ( glType === gl.INT ) internalFormat = gl.R32I;
+
+		}
+
+		if ( glFormat === gl.RG ) {
+
+			if ( glType === gl.FLOAT ) internalFormat = gl.RG32F;
+			if ( glType === gl.HALF_FLOAT ) internalFormat = gl.RG16F;
+			if ( glType === gl.UNSIGNED_BYTE ) internalFormat = gl.RG8;
+
+		}
+
+		if ( glFormat === gl.RGB ) {
+
+			if ( glType === gl.FLOAT ) internalFormat = gl.RGB32F;
+			if ( glType === gl.HALF_FLOAT ) internalFormat = gl.RGB16F;
+			if ( glType === gl.UNSIGNED_BYTE ) internalFormat = gl.RGB8;
+			if ( glType === gl.UNSIGNED_SHORT_5_6_5 ) internalFormat = gl.RGB565;
+			if ( glType === gl.UNSIGNED_SHORT_5_5_5_1 ) internalFormat = gl.RGB5_A1;
+			if ( glType === gl.UNSIGNED_SHORT_4_4_4_4 ) internalFormat = gl.RGB4;
+			if ( glType === gl.UNSIGNED_INT_5_9_9_9_REV ) internalFormat = gl.RGB9_E5;
+
+		}
+
+		if ( glFormat === gl.RGBA ) {
+
+			if ( glType === gl.FLOAT ) internalFormat = gl.RGBA32F;
+			if ( glType === gl.HALF_FLOAT ) internalFormat = gl.RGBA16F;
+			if ( glType === gl.UNSIGNED_BYTE ) internalFormat = ( colorSpace === SRGBColorSpace && forceLinearTransfer === false ) ? gl.SRGB8_ALPHA8 : gl.RGBA8;
+			if ( glType === gl.UNSIGNED_SHORT_4_4_4_4 ) internalFormat = gl.RGBA4;
+			if ( glType === gl.UNSIGNED_SHORT_5_5_5_1 ) internalFormat = gl.RGB5_A1;
+
+		}
+
+		if ( glFormat === gl.DEPTH_COMPONENT ) {
+
+			if ( glType === gl.UNSIGNED_INT ) internalFormat = gl.DEPTH24_STENCIL8;
+			if ( glType === gl.FLOAT ) internalFormat = gl.DEPTH_COMPONENT32F;
+
+		}
+
+		if ( glFormat === gl.DEPTH_STENCIL ) {
+
+			if ( glType === gl.UNSIGNED_INT_24_8 ) internalFormat = gl.DEPTH24_STENCIL8;
+
+		}
+
+		if ( internalFormat === gl.R16F || internalFormat === gl.R32F ||
+			internalFormat === gl.RG16F || internalFormat === gl.RG32F ||
+			internalFormat === gl.RGBA16F || internalFormat === gl.RGBA32F ) {
+
+			extensions.get( 'EXT_color_buffer_float' );
+
+		}
+
+		return internalFormat;
+
+	}
+
+	setTextureParameters( textureType, texture ) {
+
+		const { gl, extensions, backend } = this;
+
+		const { currentAnisotropy } = backend.get( texture );
+
+		gl.texParameteri( textureType, gl.TEXTURE_WRAP_S, wrappingToGL[ texture.wrapS ] );
+		gl.texParameteri( textureType, gl.TEXTURE_WRAP_T, wrappingToGL[ texture.wrapT ] );
+
+		if ( textureType === gl.TEXTURE_3D || textureType === gl.TEXTURE_2D_ARRAY ) {
+
+			gl.texParameteri( textureType, gl.TEXTURE_WRAP_R, wrappingToGL[ texture.wrapR ] );
+
+		}
+
+		gl.texParameteri( textureType, gl.TEXTURE_MAG_FILTER, filterToGL[ texture.magFilter ] );
+
+
+		// follow WebGPU backend mapping for texture filtering
+		const minFilter = ! texture.isVideoTexture && texture.minFilter === LinearFilter ? LinearMipmapLinearFilter : texture.minFilter;
+
+		gl.texParameteri( textureType, gl.TEXTURE_MIN_FILTER, filterToGL[ minFilter ] );
+
+		if ( texture.compareFunction ) {
+
+			gl.texParameteri( textureType, gl.TEXTURE_COMPARE_MODE, gl.COMPARE_REF_TO_TEXTURE );
+			gl.texParameteri( textureType, gl.TEXTURE_COMPARE_FUNC, compareToGL[ texture.compareFunction ] );
+
+		}
+
+		if ( extensions.has( 'EXT_texture_filter_anisotropic' ) === true ) {
+
+			if ( texture.magFilter === NearestFilter ) return;
+			if ( texture.minFilter !== NearestMipmapLinearFilter && texture.minFilter !== LinearMipmapLinearFilter ) return;
+			if ( texture.type === FloatType && extensions.has( 'OES_texture_float_linear' ) === false ) return; // verify extension for WebGL 1 and WebGL 2
+
+			if ( texture.anisotropy > 1 || currentAnisotropy !== texture.anisotropy ) {
+
+				const extension = extensions.get( 'EXT_texture_filter_anisotropic' );
+				gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, backend.getMaxAnisotropy() ) );
+				backend.get( texture ).currentAnisotropy = texture.anisotropy;
+
+			}
+
+		}
+
+	}
+
+	createDefaultTexture( texture ) {
+
+		const { gl, backend, defaultTextures } = this;
+
+
+		const glTextureType = this.getGLTextureType( texture );
+
+		let textureGPU = defaultTextures[ glTextureType ];
+
+		if ( textureGPU === undefined ) {
+
+			textureGPU = gl.createTexture();
+
+			backend.state.bindTexture( glTextureType, textureGPU );
+			gl.texParameteri( glTextureType, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
+			gl.texParameteri( glTextureType, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
+
+			// gl.texImage2D( glTextureType, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );
+
+			defaultTextures[ glTextureType ] = textureGPU;
+
+		}
+
+		backend.set( texture, {
+			textureGPU,
+			glTextureType,
+			isDefault: true
+		} );
+
+	}
+
+	createTexture( texture, options ) {
+
+		const { gl, backend } = this;
+		const { levels, width, height, depth } = options;
+
+		const glFormat = backend.utils.convert( texture.format, texture.colorSpace );
+		const glType = backend.utils.convert( texture.type );
+		const glInternalFormat = this.getInternalFormat( texture.internalFormat, glFormat, glType, texture.colorSpace, texture.isVideoTexture );
+
+		const textureGPU = gl.createTexture();
+		const glTextureType = this.getGLTextureType( texture );
+
+		backend.state.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 );
+
+		this.setTextureParameters( glTextureType, texture );
+
+		if ( texture.isDataArrayTexture ) {
+
+			gl.texStorage3D( gl.TEXTURE_2D_ARRAY, levels, glInternalFormat, width, height, depth );
+
+		} else if ( ! texture.isVideoTexture ) {
+
+			gl.texStorage2D( glTextureType, levels, glInternalFormat, width, height );
+
+		}
+
+		backend.set( texture, {
+			textureGPU,
+			glTextureType,
+			glFormat,
+			glType,
+			glInternalFormat
+		} );
+
+	}
+
+	copyBufferToTexture( buffer, texture ) {
+
+		const { gl, backend } = this;
+
+		const { textureGPU, glTextureType, glFormat, glType } = backend.get( texture );
+
+		const { width, height } = texture.source.data;
+
+		gl.bindBuffer( gl.PIXEL_UNPACK_BUFFER, buffer );
+
+		backend.state.bindTexture( glTextureType, textureGPU );
+
+		gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, false );
+		gl.pixelStorei( gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, false );
+		gl.texSubImage2D( glTextureType, 0, 0, 0, width, height, glFormat, glType, 0 );
+
+		gl.bindBuffer( gl.PIXEL_UNPACK_BUFFER, null );
+
+		backend.state.unbindTexture();
+		// debug
+		// const framebuffer = gl.createFramebuffer();
+		// gl.bindFramebuffer( gl.FRAMEBUFFER, framebuffer );
+		// gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, glTextureType, textureGPU, 0 );
+
+		// const readout = new Float32Array( width * height * 4 );
+
+		// const altFormat = gl.getParameter( gl.IMPLEMENTATION_COLOR_READ_FORMAT );
+		// const altType = gl.getParameter( gl.IMPLEMENTATION_COLOR_READ_TYPE );
+
+		// gl.readPixels( 0, 0, width, height, altFormat, altType, readout );
+		// gl.bindFramebuffer( gl.FRAMEBUFFER, null );
+		// console.log( readout );
+
+	}
+
+	updateTexture( texture, options ) {
+
+		const { gl } = this;
+		const { width, height } = options;
+		const { textureGPU, glTextureType, glFormat, glType, glInternalFormat } = this.backend.get( texture );
+
+		if ( texture.isRenderTargetTexture || ( textureGPU === undefined /* unsupported texture format */ ) )
+			return;
+
+		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;
+
+		};
+
+		this.backend.state.bindTexture( glTextureType, textureGPU );
+
+		if ( texture.isCompressedTexture ) {
+
+			const mipmaps = texture.mipmaps;
+
+			for ( let i = 0; i < mipmaps.length; i ++ ) {
+
+				const mipmap = mipmaps[ i ];
+
+				if ( texture.isCompressedArrayTexture ) {
+
+					const image = options.image;
+
+					if ( texture.format !== gl.RGBA ) {
+
+						if ( glFormat !== null ) {
+
+							gl.compressedTexSubImage3D( gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data, 0, 0 );
+
+
+						} else {
+
+							console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );
+
+						}
+
+					} else {
+
+						gl.texSubImage3D( gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, glType, mipmap.data );
+
+					}
+
+				} else {
+
+					if ( glFormat !== null ) {
+
+						gl.compressedTexSubImage2D( gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data );
+
+					} else {
+
+						console.warn( 'Unsupported compressed texture format' );
+
+					}
+
+				}
+
+			}
+
+		} else 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.isDataArrayTexture ) {
+
+			const image = options.image;
+
+			gl.texSubImage3D( gl.TEXTURE_2D_ARRAY, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data );
+
+		} 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, backend } = this;
+		const { textureGPU, glTextureType } = backend.get( texture );
+
+		backend.state.bindTexture( glTextureType, textureGPU );
+		gl.generateMipmap( glTextureType );
+
+	}
+
+	deallocateRenderBuffers( renderTarget ) {
+
+
+		const { gl, backend } = this;
+
+		// remove framebuffer reference
+		if ( renderTarget ) {
+
+			const renderContextData = backend.get( renderTarget );
+
+			renderContextData.renderBufferStorageSetup = undefined;
+
+			if ( renderContextData.framebuffer ) {
+
+				gl.deleteFramebuffer( renderContextData.framebuffer );
+				renderContextData.framebuffer = undefined;
+
+			}
+
+			if ( renderContextData.depthRenderbuffer ) {
+
+				gl.deleteRenderbuffer( renderContextData.depthRenderbuffer );
+				renderContextData.depthRenderbuffer = undefined;
+
+			}
+
+			if ( renderContextData.stencilRenderbuffer ) {
+
+				gl.deleteRenderbuffer( renderContextData.stencilRenderbuffer );
+				renderContextData.stencilRenderbuffer = undefined;
+
+			}
+
+			if ( renderContextData.msaaFrameBuffer ) {
+
+				gl.deleteFramebuffer( renderContextData.msaaFrameBuffer );
+				renderContextData.msaaFrameBuffer = undefined;
+
+			}
+
+			if ( renderContextData.msaaRenderbuffers ) {
+
+				for ( let i = 0; i < renderContextData.msaaRenderbuffers.length; i ++ ) {
+
+					gl.deleteRenderbuffer( renderContextData.msaaRenderbuffers[ i ] );
+
+				}
+
+				renderContextData.msaaRenderbuffers = undefined;
+
+			}
+
+		}
+
+	}
+
+	destroyTexture( texture ) {
+
+		const { gl, backend } = this;
+		const { textureGPU, renderTarget } = backend.get( texture );
+
+		this.deallocateRenderBuffers( renderTarget );
+		gl.deleteTexture( textureGPU );
+
+		backend.delete( texture );
+
+	}
+
+	copyTextureToTexture( position, srcTexture, dstTexture, level = 0 ) {
+
+		const { gl, backend } = this;
+		const { state } = this.backend;
+
+		const width = srcTexture.image.width;
+		const height = srcTexture.image.height;
+		const { textureGPU: dstTextureGPU, glTextureType, glType, glFormat } = backend.get( dstTexture );
+
+		state.bindTexture( glTextureType, dstTextureGPU );
+
+		// As another texture upload may have changed pixelStorei
+		// parameters, make sure they are correct for the dstTexture
+		gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, dstTexture.flipY );
+		gl.pixelStorei( gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, dstTexture.premultiplyAlpha );
+		gl.pixelStorei( gl.UNPACK_ALIGNMENT, dstTexture.unpackAlignment );
+
+		if ( srcTexture.isDataTexture ) {
+
+			gl.texSubImage2D( gl.TEXTURE_2D, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );
+
+		} else {
+
+			if ( srcTexture.isCompressedTexture ) {
+
+				gl.compressedTexSubImage2D( gl.TEXTURE_2D, level, position.x, position.y, srcTexture.mipmaps[ 0 ].width, srcTexture.mipmaps[ 0 ].height, glFormat, srcTexture.mipmaps[ 0 ].data );
+
+			} else {
+
+				gl.texSubImage2D( gl.TEXTURE_2D, level, position.x, position.y, glFormat, glType, srcTexture.image );
+
+			}
+
+		}
+
+		// Generate mipmaps only when copying level 0
+		if ( level === 0 && dstTexture.generateMipmaps ) gl.generateMipmap( gl.TEXTURE_2D );
+
+		state.unbindTexture();
+
+	}
+
+	copyFramebufferToTexture( texture, renderContext ) {
+
+		const { gl } = this;
+		const { state } = this.backend;
+
+		const { textureGPU } = this.backend.get( texture );
+
+		const width = texture.image.width;
+		const height = texture.image.height;
+
+		const requireDrawFrameBuffer = texture.isDepthTexture === true || ( renderContext.renderTarget && renderContext.renderTarget.samples > 0 );
+
+		if ( requireDrawFrameBuffer ) {
+
+			let mask;
+			let attachment;
+
+			if ( texture.isDepthTexture === true ) {
+
+				mask = gl.DEPTH_BUFFER_BIT;
+				attachment = gl.DEPTH_ATTACHMENT;
+
+				if ( renderContext.stencil ) {
+
+					mask |= gl.STENCIL_BUFFER_BIT;
+
+				}
+
+			} else {
+
+				mask = gl.COLOR_BUFFER_BIT;
+				attachment = gl.COLOR_ATTACHMENT0;
+
+			}
+
+			const fb = gl.createFramebuffer();
+			state.bindFramebuffer( gl.DRAW_FRAMEBUFFER, fb );
+
+			gl.framebufferTexture2D( gl.DRAW_FRAMEBUFFER, attachment, gl.TEXTURE_2D, textureGPU, 0 );
+
+			gl.blitFramebuffer( 0, 0, width, height, 0, 0, width, height, mask, gl.NEAREST );
+
+			gl.deleteFramebuffer( fb );
+
+		} else {
+
+			state.bindTexture( gl.TEXTURE_2D, textureGPU );
+			gl.copyTexSubImage2D( gl.TEXTURE_2D, 0, 0, 0, 0, 0, width, height );
+
+			state.unbindTexture();
+
+		}
+
+		if ( texture.generateMipmaps ) this.generateMipmaps( texture );
+
+		this.backend._setFramebuffer( renderContext );
+
+	}
+
+	// Setup storage for internal depth/stencil buffers and bind to correct framebuffer
+	setupRenderBufferStorage( renderbuffer, renderContext ) {
+
+		const { gl } = this;
+		const renderTarget = renderContext.renderTarget;
+
+		const { samples, depthTexture, depthBuffer, stencilBuffer, width, height } = renderTarget;
+
+		gl.bindRenderbuffer( gl.RENDERBUFFER, renderbuffer );
+
+		if ( depthBuffer && ! stencilBuffer ) {
+
+			let glInternalFormat = gl.DEPTH_COMPONENT24;
+
+			if ( samples > 0 ) {
+
+				if ( depthTexture && depthTexture.isDepthTexture ) {
+
+					if ( depthTexture.type === gl.FLOAT ) {
+
+						glInternalFormat = gl.DEPTH_COMPONENT32F;
+
+					}
+
+				}
+
+				gl.renderbufferStorageMultisample( gl.RENDERBUFFER, samples, glInternalFormat, width, height );
+
+			} else {
+
+				gl.renderbufferStorage( gl.RENDERBUFFER, glInternalFormat, width, height );
+
+			}
+
+			gl.framebufferRenderbuffer( gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, renderbuffer );
+
+		} else if ( depthBuffer && stencilBuffer ) {
+
+			if ( samples > 0 ) {
+
+				gl.renderbufferStorageMultisample( gl.RENDERBUFFER, samples, gl.DEPTH24_STENCIL8, width, height );
+
+			} else {
+
+				gl.renderbufferStorage( gl.RENDERBUFFER, gl.DEPTH_STENCIL, width, height );
+
+			}
+
+
+			gl.framebufferRenderbuffer( gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, renderbuffer );
+
+		}
+
+	}
+
+	async copyTextureToBuffer( texture, x, y, width, height ) {
+
+		const { backend, gl } = this;
+
+		const { textureGPU, glFormat, glType } = this.backend.get( texture );
+
+		const fb = gl.createFramebuffer();
+
+		gl.bindFramebuffer( gl.READ_FRAMEBUFFER, fb );
+		gl.framebufferTexture2D( gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, textureGPU, 0 );
+
+		const typedArrayType = this._getTypedArrayType( glType );
+		const bytesPerTexel = this._getBytesPerTexel( glFormat );
+
+		const elementCount = width * height;
+		const byteLength = elementCount * bytesPerTexel;
+
+		const buffer = gl.createBuffer();
+
+		gl.bindBuffer( gl.PIXEL_PACK_BUFFER, buffer );
+		gl.bufferData( gl.PIXEL_PACK_BUFFER, byteLength, gl.STREAM_READ );
+		gl.readPixels( x, y, width, height, glFormat, glType, 0 );
+		gl.bindBuffer( gl.PIXEL_PACK_BUFFER, null );
+
+		await backend.utils._clientWaitAsync();
+
+		const dstBuffer = new typedArrayType( byteLength / typedArrayType.BYTES_PER_ELEMENT );
+
+		gl.bindBuffer( gl.PIXEL_PACK_BUFFER, buffer );
+		gl.getBufferSubData( gl.PIXEL_PACK_BUFFER, 0, dstBuffer );
+		gl.bindBuffer( gl.PIXEL_PACK_BUFFER, null );
+
+		gl.deleteFramebuffer( fb );
+
+		return dstBuffer;
+
+	}
+
+	_getTypedArrayType( glType ) {
+
+		const { gl } = this;
+
+		if ( glType === gl.UNSIGNED_BYTE ) return Uint8Array;
+
+		if ( glType === gl.UNSIGNED_SHORT_4_4_4_4 ) return Uint16Array;
+		if ( glType === gl.UNSIGNED_SHORT_5_5_5_1 ) return Uint16Array;
+		if ( glType === gl.UNSIGNED_SHORT_5_6_5 ) return Uint16Array;
+		if ( glType === gl.UNSIGNED_SHORT ) return Uint16Array;
+		if ( glType === gl.UNSIGNED_INT ) return Uint32Array;
+
+		if ( glType === gl.FLOAT ) return Float32Array;
+
+		throw new Error( `Unsupported WebGL type: ${glType}` );
+
+	}
+
+	_getBytesPerTexel( glFormat ) {
+
+		const { gl } = this;
+
+		if ( glFormat === gl.RGBA ) return 4;
+		if ( glFormat === gl.RGB ) return 3;
+		if ( glFormat === gl.ALPHA ) return 1;
+
+	}
+
+}
+
+export default WebGLTextureUtils;

public/sdk/three/jsm/renderers/webgl/utils/WebGLUtils.js

@@ -0,0 +1,268 @@
+import { RGBA_ASTC_4x4_Format, RGBA_ASTC_5x4_Format, RGBA_ASTC_5x5_Format, RGBA_ASTC_6x5_Format, RGBA_ASTC_6x6_Format, RGBA_ASTC_8x5_Format, RGBA_ASTC_8x6_Format, RGBA_ASTC_8x8_Format, RGBA_ASTC_10x5_Format, RGBA_ASTC_10x6_Format, RGBA_ASTC_10x8_Format, RGBA_ASTC_10x10_Format, RGBA_ASTC_12x10_Format, RGBA_ASTC_12x12_Format, RGB_ETC1_Format, RGB_ETC2_Format, RGBA_ETC2_EAC_Format, RGBA_PVRTC_2BPPV1_Format, RGBA_PVRTC_4BPPV1_Format, RGB_PVRTC_2BPPV1_Format, RGB_PVRTC_4BPPV1_Format, RGBA_S3TC_DXT5_Format, RGBA_S3TC_DXT3_Format, RGBA_S3TC_DXT1_Format, RGB_S3TC_DXT1_Format, DepthFormat, DepthStencilFormat, LuminanceAlphaFormat, LuminanceFormat, RedFormat, RGBFormat, RGBAFormat, AlphaFormat, RedIntegerFormat, RGFormat, RGIntegerFormat, RGBAIntegerFormat, HalfFloatType, FloatType, UnsignedIntType, IntType, UnsignedShortType, ShortType, ByteType, UnsignedInt248Type, UnsignedInt5999Type, UnsignedShort5551Type, UnsignedShort4444Type, UnsignedByteType, RGBA_BPTC_Format, RED_RGTC1_Format, SIGNED_RED_RGTC1_Format, RED_GREEN_RGTC2_Format, SIGNED_RED_GREEN_RGTC2_Format, SRGBColorSpace, NoColorSpace } from 'three';
+
+class WebGLUtils {
+
+	constructor( backend ) {
+
+		this.backend = backend;
+
+		this.gl = this.backend.gl;
+		this.extensions = backend.extensions;
+
+	}
+
+	convert( p, colorSpace = NoColorSpace ) {
+
+		const { gl, extensions } = this;
+
+		let extension;
+
+		if ( p === UnsignedByteType ) return gl.UNSIGNED_BYTE;
+		if ( p === UnsignedShort4444Type ) return gl.UNSIGNED_SHORT_4_4_4_4;
+		if ( p === UnsignedShort5551Type ) return gl.UNSIGNED_SHORT_5_5_5_1;
+		if ( p === UnsignedInt5999Type ) return gl.UNSIGNED_INT_5_9_9_9_REV;
+
+		if ( p === ByteType ) return gl.BYTE;
+		if ( p === ShortType ) return gl.SHORT;
+		if ( p === UnsignedShortType ) return gl.UNSIGNED_SHORT;
+		if ( p === IntType ) return gl.INT;
+		if ( p === UnsignedIntType ) return gl.UNSIGNED_INT;
+		if ( p === FloatType ) return gl.FLOAT;
+
+		if ( p === HalfFloatType ) {
+
+			return gl.HALF_FLOAT;
+
+		}
+
+		if ( p === AlphaFormat ) return gl.ALPHA;
+		if ( p === RGBFormat ) return gl.RGB;
+		if ( p === RGBAFormat ) return gl.RGBA;
+		if ( p === LuminanceFormat ) return gl.LUMINANCE;
+		if ( p === LuminanceAlphaFormat ) return gl.LUMINANCE_ALPHA;
+		if ( p === DepthFormat ) return gl.DEPTH_COMPONENT;
+		if ( p === DepthStencilFormat ) return gl.DEPTH_STENCIL;
+
+		// WebGL2 formats.
+
+		if ( p === RedFormat ) return gl.RED;
+		if ( p === RedIntegerFormat ) return gl.RED_INTEGER;
+		if ( p === RGFormat ) return gl.RG;
+		if ( p === RGIntegerFormat ) return gl.RG_INTEGER;
+		if ( p === RGBAIntegerFormat ) return gl.RGBA_INTEGER;
+
+		// S3TC
+
+		if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {
+
+			if ( colorSpace === SRGBColorSpace ) {
+
+				extension = extensions.get( 'WEBGL_compressed_texture_s3tc_srgb' );
+
+				if ( extension !== null ) {
+
+					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_SRGB_S3TC_DXT1_EXT;
+					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
+					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
+					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
+
+				} else {
+
+					return null;
+
+				}
+
+			} else {
+
+				extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );
+
+				if ( extension !== null ) {
+
+					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
+					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
+					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
+					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
+
+				} else {
+
+					return null;
+
+				}
+
+			}
+
+		}
+
+		// PVRTC
+
+		if ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {
+
+			extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );
+
+			if ( extension !== null ) {
+
+				if ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
+				if ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
+				if ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
+				if ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
+
+			} else {
+
+				return null;
+
+			}
+
+		}
+
+		// ETC
+
+		if ( p === RGB_ETC1_Format || p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format ) {
+
+			extension = extensions.get( 'WEBGL_compressed_texture_etc' );
+
+			if ( extension !== null ) {
+
+				if ( p === RGB_ETC1_Format || p === RGB_ETC2_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2;
+				if ( p === RGBA_ETC2_EAC_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC;
+
+			} else {
+
+				return null;
+
+			}
+
+		}
+
+		// ASTC
+
+		if ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||
+			p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||
+			p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||
+			p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||
+			p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ) {
+
+			extension = extensions.get( 'WEBGL_compressed_texture_astc' );
+
+			if ( extension !== null ) {
+
+				if ( p === RGBA_ASTC_4x4_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR;
+				if ( p === RGBA_ASTC_5x4_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR;
+				if ( p === RGBA_ASTC_5x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR;
+				if ( p === RGBA_ASTC_6x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR;
+				if ( p === RGBA_ASTC_6x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR;
+				if ( p === RGBA_ASTC_8x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR;
+				if ( p === RGBA_ASTC_8x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR;
+				if ( p === RGBA_ASTC_8x8_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR;
+				if ( p === RGBA_ASTC_10x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR;
+				if ( p === RGBA_ASTC_10x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR;
+				if ( p === RGBA_ASTC_10x8_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR;
+				if ( p === RGBA_ASTC_10x10_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR;
+				if ( p === RGBA_ASTC_12x10_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR;
+				if ( p === RGBA_ASTC_12x12_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR : extension.COMPRESSED_RGBA_ASTC_12x12_KHR;
+
+			} else {
+
+				return null;
+
+			}
+
+		}
+
+		// BPTC
+
+		if ( p === RGBA_BPTC_Format ) {
+
+			extension = extensions.get( 'EXT_texture_compression_bptc' );
+
+			if ( extension !== null ) {
+
+				if ( p === RGBA_BPTC_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT;
+
+			} else {
+
+				return null;
+
+			}
+
+		}
+
+		// RGTC
+
+		if ( p === RED_RGTC1_Format || p === SIGNED_RED_RGTC1_Format || p === RED_GREEN_RGTC2_Format || p === SIGNED_RED_GREEN_RGTC2_Format ) {
+
+			extension = extensions.get( 'EXT_texture_compression_rgtc' );
+
+			if ( extension !== null ) {
+
+				if ( p === RGBA_BPTC_Format ) return extension.COMPRESSED_RED_RGTC1_EXT;
+				if ( p === SIGNED_RED_RGTC1_Format ) return extension.COMPRESSED_SIGNED_RED_RGTC1_EXT;
+				if ( p === RED_GREEN_RGTC2_Format ) return extension.COMPRESSED_RED_GREEN_RGTC2_EXT;
+				if ( p === SIGNED_RED_GREEN_RGTC2_Format ) return extension.COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT;
+
+			} else {
+
+				return null;
+
+			}
+
+		}
+
+		//
+
+		if ( p === UnsignedInt248Type ) {
+
+			return gl.UNSIGNED_INT_24_8;
+
+		}
+
+		// if "p" can't be resolved, assume the user defines a WebGL constant as a string (fallback/workaround for packed RGB formats)
+
+		return ( gl[ p ] !== undefined ) ? gl[ p ] : null;
+
+	}
+
+	_clientWaitAsync() {
+
+		const { gl } = this;
+
+		const sync = gl.fenceSync( gl.SYNC_GPU_COMMANDS_COMPLETE, 0 );
+
+		gl.flush();
+
+		return new Promise( ( resolve, reject ) => {
+
+			function test() {
+
+				const res = gl.clientWaitSync( sync, gl.SYNC_FLUSH_COMMANDS_BIT, 0 );
+
+				if ( res === gl.WAIT_FAILED ) {
+
+					gl.deleteSync( sync );
+
+					reject();
+					return;
+
+				}
+
+				if ( res === gl.TIMEOUT_EXPIRED ) {
+
+					requestAnimationFrame( test );
+					return;
+
+				}
+
+				gl.deleteSync( sync );
+
+				resolve();
+
+			}
+
+			test();
+
+		} );
+
+	}
+
+}
+
+export default WebGLUtils;