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three

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JavaScript 3D library

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import { Cache } from './Cache.js'; import { Loader } from './Loader.js'; function ImageBitmapLoader( manager ) { if ( typeof createImageBitmap === 'undefined' ) { console.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' ); } if ( typeof fetch === 'undefined' ) { console.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' ); } Loader.call( this, manager ); this.options = { premultiplyAlpha: 'none' }; } ImageBitmapLoader.prototype = Object.assign( Object.create( Loader.prototype ), { constructor: ImageBitmapLoader, isImageBitmapLoader: true, setOptions: function setOptions( options ) { this.options = options; return this; }, load: function ( url, onLoad, onProgress, onError ) { if ( url === undefined ) url = ''; if ( this.path !== undefined ) url = this.path + url; url = this.manager.resolveURL( url ); const scope = this; const cached = Cache.get( url ); if ( cached !== undefined ) { scope.manager.itemStart( url ); setTimeout( function () { if ( onLoad ) onLoad( cached ); scope.manager.itemEnd( url ); }, 0 ); return cached; } fetch( url ).then( function ( res ) { return res.blob(); } ).then( function ( blob ) { return createImageBitmap( blob, scope.options ); } ).then( function ( imageBitmap ) { Cache.add( url, imageBitmap ); if ( onLoad ) onLoad( imageBitmap ); scope.manager.itemEnd( url ); } ).catch( function ( e ) { if ( onError ) onError( e ); scope.manager.itemError( url ); scope.manager.itemEnd( url ); } ); scope.manager.itemStart( url ); } } ); export { ImageBitmapLoader };