最新代码

public/sdk/three/jsm/renderers/common/Backend.js

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+let vector2 = null;
+let vector4 = null;
+let color4 = null;
+
+import Color4 from './Color4.js';
+import { Vector2, Vector4, REVISION, createCanvasElement } from 'three';
+
+class Backend {
+
+	constructor( parameters = {} ) {
+
+		this.parameters = Object.assign( {}, parameters );
+		this.data = new WeakMap();
+		this.renderer = null;
+		this.domElement = null;
+
+	}
+
+	async init( renderer ) {
+
+		this.renderer = renderer;
+
+	}
+
+	// render context
+
+	begin( renderContext ) { }
+
+	finish( renderContext ) { }
+
+	// render object
+
+	draw( renderObject, info ) { }
+
+	// program
+
+	createProgram( program ) { }
+
+	destroyProgram( program ) { }
+
+	// bindings
+
+	createBindings( renderObject ) { }
+
+	updateBindings( renderObject ) { }
+
+	// pipeline
+
+	createRenderPipeline( renderObject ) { }
+
+	createComputePipeline( computeNode, pipeline ) { }
+
+	destroyPipeline( pipeline ) { }
+
+	// cache key
+
+	needsRenderUpdate( renderObject ) { } // return Boolean ( fast test )
+
+	getRenderCacheKey( renderObject ) { } // return String
+
+	// node builder
+
+	createNodeBuilder( renderObject ) { } // return NodeBuilder (ADD IT)
+
+	// textures
+
+	createSampler( texture ) { }
+
+	createDefaultTexture( texture ) { }
+
+	createTexture( texture ) { }
+
+	copyTextureToBuffer( texture, x, y, width, height ) {}
+
+	// attributes
+
+	createAttribute( attribute ) { }
+
+	createIndexAttribute( attribute ) { }
+
+	updateAttribute( attribute ) { }
+
+	destroyAttribute( attribute ) { }
+
+	// canvas
+
+	getContext() { }
+
+	updateSize() { }
+
+	// utils
+
+	resolveTimestampAsync( renderContext, type ) { }
+
+	hasFeatureAsync( name ) { } // return Boolean
+
+	hasFeature( name ) { } // return Boolean
+
+	getInstanceCount( renderObject ) {
+
+		const { object, geometry } = renderObject;
+
+		return geometry.isInstancedBufferGeometry ? geometry.instanceCount : ( object.isInstancedMesh ? object.count : 1 );
+
+	}
+
+	getDrawingBufferSize() {
+
+		vector2 = vector2 || new Vector2();
+
+		return this.renderer.getDrawingBufferSize( vector2 );
+
+	}
+
+	getScissor() {
+
+		vector4 = vector4 || new Vector4();
+
+		return this.renderer.getScissor( vector4 );
+
+	}
+
+	setScissorTest( boolean ) { }
+
+	getClearColor() {
+
+		const renderer = this.renderer;
+
+		color4 = color4 || new Color4();
+
+		renderer.getClearColor( color4 );
+
+		color4.getRGB( color4, this.renderer.currentColorSpace );
+
+		return color4;
+
+	}
+
+	getDomElement() {
+
+		let domElement = this.domElement;
+
+		if ( domElement === null ) {
+
+			domElement = ( this.parameters.canvas !== undefined ) ? this.parameters.canvas : createCanvasElement();
+
+			// OffscreenCanvas does not have setAttribute, see #22811
+			if ( 'setAttribute' in domElement ) domElement.setAttribute( 'data-engine', `three.js r${REVISION} webgpu` );
+
+			this.domElement = domElement;
+
+		}
+
+		return domElement;
+
+	}
+
+	// resource properties
+
+	set( object, value ) {
+
+		this.data.set( object, value );
+
+	}
+
+	get( object ) {
+
+		let map = this.data.get( object );
+
+		if ( map === undefined ) {
+
+			map = {};
+			this.data.set( object, map );
+
+		}
+
+		return map;
+
+	}
+
+	has( object ) {
+
+		return this.data.has( object );
+
+	}
+
+	delete( object ) {
+
+		this.data.delete( object );
+
+	}
+
+}
+
+export default Backend;