File size: 2,218 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | import { Cache } from './Cache.js';
import { Loader } from './Loader.js';
class ImageBitmapLoader extends Loader {
constructor( manager ) {
super( manager );
this.isImageBitmapLoader = true;
if ( typeof createImageBitmap === 'undefined' ) {
console.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' );
}
if ( typeof fetch === 'undefined' ) {
console.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' );
}
this.options = { premultiplyAlpha: 'none' };
}
setOptions( options ) {
this.options = options;
return this;
}
load( 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 );
// If cached is a promise, wait for it to resolve
if ( cached.then ) {
cached.then( imageBitmap => {
if ( onLoad ) onLoad( imageBitmap );
scope.manager.itemEnd( url );
} ).catch( e => {
if ( onError ) onError( e );
} );
return;
}
// If cached is not a promise (i.e., it's already an imageBitmap)
setTimeout( function () {
if ( onLoad ) onLoad( cached );
scope.manager.itemEnd( url );
}, 0 );
return cached;
}
const fetchOptions = {};
fetchOptions.credentials = ( this.crossOrigin === 'anonymous' ) ? 'same-origin' : 'include';
fetchOptions.headers = this.requestHeader;
const promise = fetch( url, fetchOptions ).then( function ( res ) {
return res.blob();
} ).then( function ( blob ) {
return createImageBitmap( blob, Object.assign( scope.options, { colorSpaceConversion: 'none' } ) );
} ).then( function ( imageBitmap ) {
Cache.add( url, imageBitmap );
if ( onLoad ) onLoad( imageBitmap );
scope.manager.itemEnd( url );
return imageBitmap;
} ).catch( function ( e ) {
if ( onError ) onError( e );
Cache.remove( url );
scope.manager.itemError( url );
scope.manager.itemEnd( url );
} );
Cache.add( url, promise );
scope.manager.itemStart( url );
}
}
export { ImageBitmapLoader };
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