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+/**
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+ * @author gero3 / https://github.com/gero3
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+ * @author tentone / https://github.com/tentone
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+ *
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+ * Requires opentype.js to be included in the project.
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+ * Loads TTF files and converts them into typeface JSON that can be used directly
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+ * to create THREE.Font objects.
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+ */
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+
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+import {
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+ DefaultLoadingManager,
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+ FileLoader
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+} from "../../../build/three.module.js";
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+
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+var TTFLoader = function ( manager ) {
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+
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+ this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
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+ this.reversed = false;
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+
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+};
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+
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+TTFLoader.prototype = {
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+
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+ constructor: TTFLoader,
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+
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+ load: function ( url, onLoad, onProgress, onError ) {
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+
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+ var scope = this;
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+
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+ var loader = new FileLoader( this.manager );
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+ loader.setPath( this.path );
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+ loader.setResponseType( 'arraybuffer' );
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+ loader.load( url, function ( buffer ) {
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+
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+ onLoad( scope.parse( buffer ) );
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+
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+ }, onProgress, onError );
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+
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+ },
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+
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+ setPath: function ( value ) {
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+
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+ this.path = value;
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+ return this;
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+
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+ },
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+
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+ parse: function ( arraybuffer ) {
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+
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+ function convert( font, reversed ) {
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+
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+ var round = Math.round;
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+
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+ var glyphs = {};
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+ var scale = ( 100000 ) / ( ( font.unitsPerEm || 2048 ) * 72 );
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+
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+ for ( var i = 0; i < font.glyphs.length; i ++ ) {
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+
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+ var glyph = font.glyphs.glyphs[ i ];
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+
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+ if ( glyph.unicode !== undefined ) {
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+
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+ var token = {
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+ ha: round( glyph.advanceWidth * scale ),
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+ x_min: round( glyph.xMin * scale ),
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+ x_max: round( glyph.xMax * scale ),
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+ o: ''
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+ };
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+
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+ if ( reversed ) {
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+
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+ glyph.path.commands = reverseCommands( glyph.path.commands );
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+
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+ }
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+
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+ glyph.path.commands.forEach( function ( command ) {
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+
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+ if ( command.type.toLowerCase() === 'c' ) {
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+
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+ command.type = 'b';
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+
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+ }
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+
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+ token.o += command.type.toLowerCase() + ' ';
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+
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+ if ( command.x !== undefined && command.y !== undefined ) {
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+
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+ token.o += round( command.x * scale ) + ' ' + round( command.y * scale ) + ' ';
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+
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+ }
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+
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+ if ( command.x1 !== undefined && command.y1 !== undefined ) {
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+
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+ token.o += round( command.x1 * scale ) + ' ' + round( command.y1 * scale ) + ' ';
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+
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+ }
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+
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+ if ( command.x2 !== undefined && command.y2 !== undefined ) {
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+
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+ token.o += round( command.x2 * scale ) + ' ' + round( command.y2 * scale ) + ' ';
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+
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+ }
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+
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+ } );
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+
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+ glyphs[ String.fromCharCode( glyph.unicode ) ] = token;
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+
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+ }
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+
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+ }
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+
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+ return {
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+ glyphs: glyphs,
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+ familyName: font.familyName,
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+ ascender: round( font.ascender * scale ),
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+ descender: round( font.descender * scale ),
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+ underlinePosition: font.tables.post.underlinePosition,
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+ underlineThickness: font.tables.post.underlineThickness,
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+ boundingBox: {
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+ xMin: font.tables.head.xMin,
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+ xMax: font.tables.head.xMax,
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+ yMin: font.tables.head.yMin,
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+ yMax: font.tables.head.yMax
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+ },
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+ resolution: 1000,
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+ original_font_information: font.tables.name
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+ };
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+
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+ }
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+
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+ function reverseCommands( commands ) {
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+
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+ var paths = [];
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+ var path;
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+
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+ commands.forEach( function ( c ) {
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+
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+ if ( c.type.toLowerCase() === 'm' ) {
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+
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+ path = [ c ];
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+ paths.push( path );
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+
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+ } else if ( c.type.toLowerCase() !== 'z' ) {
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+
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+ path.push( c );
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+
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+ }
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+
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+ } );
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+
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+ var reversed = [];
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+
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+ paths.forEach( function ( p ) {
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+
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+ var result = {
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+ type: 'm',
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+ x: p[ p.length - 1 ].x,
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+ y: p[ p.length - 1 ].y
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+ };
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+
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+ reversed.push( result );
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+
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+ for ( var i = p.length - 1; i > 0; i -- ) {
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+
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+ var command = p[ i ];
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+ var result = { type: command.type };
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+
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+ if ( command.x2 !== undefined && command.y2 !== undefined ) {
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+
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+ result.x1 = command.x2;
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+ result.y1 = command.y2;
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+ result.x2 = command.x1;
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+ result.y2 = command.y1;
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+
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+ } else if ( command.x1 !== undefined && command.y1 !== undefined ) {
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+
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+ result.x1 = command.x1;
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+ result.y1 = command.y1;
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+
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+ }
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+
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+ result.x = p[ i - 1 ].x;
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+ result.y = p[ i - 1 ].y;
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+ reversed.push( result );
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+
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+ }
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+
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+ } );
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+
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+ return reversed;
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+
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+ }
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+
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+ if ( typeof opentype === 'undefined' ) {
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+
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+ console.warn( 'THREE.TTFLoader: The loader requires opentype.js. Make sure it\'s included before using the loader.' );
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+ return null;
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+
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+ }
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+
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+ return convert( opentype.parse( arraybuffer ), this.reversed );
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+
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+ }
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+
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+};
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+
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+export { TTFLoader };
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