Initial commit

node_modules/three/examples/jsm/renderers/webgl/nodes/GLSLNodeBuilder.js

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+import { MathNode, GLSLNodeParser, NodeBuilder, NodeMaterial, FunctionNode } from '../../../nodes/Nodes.js';
+
+import UniformBuffer from '../../common/UniformBuffer.js';
+import UniformsGroup from '../../common/UniformsGroup.js';
+import { NodeSampledTexture, NodeSampledCubeTexture } from '../../common/nodes/NodeSampledTexture.js';
+
+const glslMethods = {
+	[ MathNode.ATAN2 ]: 'atan',
+	textureDimensions: 'textureSize'
+};
+
+const precisionLib = {
+	low: 'lowp',
+	medium: 'mediump',
+	high: 'highp'
+};
+
+const supports = {
+	instance: true
+};
+
+class GLSLNodeBuilder extends NodeBuilder {
+
+	constructor( object, renderer, scene = null ) {
+
+		super( object, renderer, new GLSLNodeParser(), scene );
+
+		this.uniformsGroup = {};
+
+	}
+
+	getMethod( method ) {
+
+		return glslMethods[ method ] || method;
+
+	}
+
+	getPropertyName( node, shaderStage ) {
+
+		if ( node.isOutputStructVar ) return '';
+
+		return super.getPropertyName( node, shaderStage );
+
+	}
+
+	buildFunctionNode( 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 new FunctionNode( code );
+
+	}
+
+	getTexture( texture, textureProperty, uvSnippet ) {
+
+		if ( texture.isTextureCube ) {
+
+			return `textureCube( ${textureProperty}, ${uvSnippet} )`;
+
+		} else if ( texture.isDepthTexture ) {
+
+			return `texture( ${textureProperty}, ${uvSnippet} ).x`;
+
+		} else {
+
+			return `texture( ${textureProperty}, ${uvSnippet} )`;
+
+		}
+
+	}
+
+	getTextureLevel( texture, textureProperty, uvSnippet, biasSnippet ) {
+
+		return `textureLod( ${textureProperty}, ${uvSnippet}, ${biasSnippet} )`;
+
+	}
+
+	getTextureCompare( texture, textureProperty, uvSnippet, compareSnippet, 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 groupSnippets = [];
+
+		for ( const uniform of uniforms ) {
+
+			let snippet = null;
+			let group = false;
+
+			if ( uniform.type === 'texture' ) {
+
+				if ( uniform.node.value.compareFunction ) {
+
+					snippet = `sampler2DShadow ${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;
+
+				groupSnippets.push( snippet );
+
+			} else {
+
+				snippet = 'uniform ' + snippet;
+
+				bindingSnippets.push( snippet );
+
+			}
+
+		}
+
+		let output = '';
+
+		if ( groupSnippets.length > 0 ) {
+
+			output += this._getGLSLUniformStruct( shaderStage + 'NodeUniforms', groupSnippets.join( '\n' ) ) + '\n';
+
+		}
+
+		output += bindingSnippets.join( '\n' );
+
+		return output;
+
+	}
+
+	getAttributes( shaderStage ) {
+
+		let snippet = '';
+
+		if ( shaderStage === 'vertex' ) {
+
+			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' ) {
+
+			for ( const varying of varyings ) {
+
+				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 'gl_VertexID';
+
+	}
+
+	getInstanceIndex() {
+
+		return 'uint( gl_InstanceID )';
+
+	}
+
+	getFrontFacing() {
+
+		return 'gl_FrontFacing';
+
+	}
+
+	getFragCoord() {
+
+		return 'gl_FragCoord';
+
+	}
+
+	isAvailable( name ) {
+
+		return supports[ name ] === true;
+
+	}
+
+
+	isFlipY() {
+
+		return true;
+
+	}
+
+	_getGLSLUniformStruct( name, vars ) {
+
+		return `
+layout( std140 ) uniform ${name} {
+${vars}
+};`;
+
+	}
+
+	_getGLSLVertexCode( shaderData ) {
+
+		return `#version 300 es
+
+${ this.getSignature() }
+
+// precision
+precision highp float;
+precision highp int;
+
+// uniforms
+${shaderData.uniforms}
+
+// varyings
+${shaderData.varyings}
+
+// attributes
+${shaderData.attributes}
+
+// codes
+${shaderData.codes}
+
+void main() {
+
+	// vars
+	${shaderData.vars}
+
+	// flow
+	${shaderData.flow}
+
+	gl_PointSize = 1.0;
+
+}
+`;
+
+	}
+
+	_getGLSLFragmentCode( shaderData ) {
+
+		return `#version 300 es
+
+${ this.getSignature() }
+
+// precision
+precision highp float;
+precision highp int;
+precision lowp sampler2DShadow;
+
+// 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.flow = flow;
+
+		}
+
+		if ( this.material !== null ) {
+
+			this.vertexShader = this._getGLSLVertexCode( shadersData.vertex );
+			this.fragmentShader = this._getGLSLFragmentCode( shadersData.fragment );
+
+		} else {
+
+			console.warn( 'GLSLNodeBuilder: compute shaders are not supported.' );
+			//this.computeShader = this._getGLSLComputeCode( shadersData.compute );
+
+		}
+
+	}
+
+	getUniformFromNode( node, type, shaderStage, name = null ) {
+
+		const uniformNode = super.getUniformFromNode( node, type, shaderStage, name );
+		const nodeData = this.getDataFromNode( node, shaderStage );
+
+		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_${node.id}`;
+
+				const buffer = new UniformBuffer( node.name, node.value );
+
+				uniformNode.name = `buffer${node.id}`;
+
+				this.bindings[ shaderStage ].push( buffer );
+
+				uniformGPU = buffer;
+
+			} else {
+
+				let uniformsGroup = this.uniformsGroup[ shaderStage ];
+
+				if ( uniformsGroup === undefined ) {
+
+					uniformsGroup = new UniformsGroup( shaderStage + 'NodeUniforms' );
+					//uniformsGroup.setVisibility( gpuShaderStageLib[ shaderStage ] );
+
+					this.uniformsGroup[ shaderStage ] = uniformsGroup;
+
+					this.bindings[ shaderStage ].push( uniformsGroup );
+
+				}
+
+				uniformGPU = this.getNodeUniform( uniformNode, type );
+
+				uniformsGroup.addUniform( uniformGPU );
+
+			}
+
+			nodeData.uniformGPU = uniformGPU;
+
+		}
+
+		return uniformNode;
+
+	}
+
+	build() {
+
+		// @TODO: Move this code to super.build()
+
+		const { object, material } = this;
+
+		if ( material !== null ) {
+
+			NodeMaterial.fromMaterial( material ).build( this );
+
+		} else {
+
+			this.addFlow( 'compute', object );
+
+		}
+
+		return super.build();
+
+	}
+
+}
+
+export default GLSLNodeBuilder;