import { ImageUtils } from '../extras/ImageUtils.js';
import { generateUUID } from '../math/MathUtils.js';
let _sourceId = 0;
class Source {
constructor( data = null ) {
this.isSource = true;
Object.defineProperty( this, 'id', { value: _sourceId ++ } );
this.uuid = generateUUID();
this.data = data;
this.dataReady = true;
this.version = 0;
}
set needsUpdate( value ) {
if ( value === true ) this.version ++;
}
toJSON( meta ) {
const isRootObject = ( meta === undefined || typeof meta === 'string' );
if ( ! isRootObject && meta.images[ this.uuid ] !== undefined ) {
return meta.images[ this.uuid ];
}
const output = {
uuid: this.uuid,
url: ''
};
const data = this.data;
if ( data !== null ) {
let url;
if ( Array.isArray( data ) ) {
// cube texture
url = [];
for ( let i = 0, l = data.length; i < l; i ++ ) {
if ( data[ i ].isDataTexture ) {
url.push( serializeImage( data[ i ].image ) );
} else {
url.push( serializeImage( data[ i ] ) );
}
}
} else {
// texture
url = serializeImage( data );
}
output.url = url;
}
if ( ! isRootObject ) {
meta.images[ this.uuid ] = output;
}
return output;
}
}
function serializeImage( image ) {
if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||
( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||
( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {
// default images
return ImageUtils.getDataURL( image );
} else {
if ( image.data ) {
// images of DataTexture
return {
data: Array.from( image.data ),
width: image.width,
height: image.height,
type: image.data.constructor.name
};
} else {
console.warn( 'THREE.Texture: Unable to serialize Texture.' );
return {};
}
}
}
export { Source };