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