text: /**
   * @author Nikos M. / https://github.com/foo123/
   */
  
  // https://github.com/mrdoob/three.js/issues/5552
  // http://en.wikipedia.org/wiki/RGBE_image_format
  
  THREE.RGBELoader = function ( manager ) {
  
  	this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
  	this.type = THREE.UnsignedByteType;
  
  };
  
  // extend THREE.DataTextureLoader
  THREE.RGBELoader.prototype = Object.create( THREE.DataTextureLoader.prototype );
  
  // adapted from http://www.graphics.cornell.edu/~bjw/rgbe.html
  THREE.RGBELoader.prototype._parser = function ( buffer ) {
  
  	var
  		/* return codes for rgbe routines */
  		RGBE_RETURN_SUCCESS = 0,
  		RGBE_RETURN_FAILURE = - 1,
  
  		/* default error routine.  change this to change error handling */
  		rgbe_read_error = 1,
  		rgbe_write_error = 2,
  		rgbe_format_error = 3,
  		rgbe_memory_error = 4,
  		rgbe_error = function ( rgbe_error_code, msg ) {
  
  			switch ( rgbe_error_code ) {
  
  				case rgbe_read_error: console.error( "THREE.RGBELoader Read Error: " + ( msg || '' ) );
  					break;
  				case rgbe_write_error: console.error( "THREE.RGBELoader Write Error: " + ( msg || '' ) );
  					break;
  				case rgbe_format_error: console.error( "THREE.RGBELoader Bad File Format: " + ( msg || '' ) );
  					break;
  				default:
  				case rgbe_memory_error: console.error( "THREE.RGBELoader: Error: " + ( msg || '' ) );
  
  			}
  			return RGBE_RETURN_FAILURE;
  
  		},
  
  		/* offsets to red, green, and blue components in a data (float) pixel */
  		RGBE_DATA_RED = 0,
  		RGBE_DATA_GREEN = 1,
  		RGBE_DATA_BLUE = 2,
  
  		/* number of floats per pixel, use 4 since stored in rgba image format */
  		RGBE_DATA_SIZE = 4,
  
  		/* flags indicating which fields in an rgbe_header_info are valid */
  		RGBE_VALID_PROGRAMTYPE = 1,
  		RGBE_VALID_FORMAT = 2,
  		RGBE_VALID_DIMENSIONS = 4,
  
  		NEWLINE = "\n",
  
  		fgets = function ( buffer, lineLimit, consume ) {
  
  			lineLimit = ! lineLimit ? 1024 : lineLimit;
  			var p = buffer.pos,
  				i = - 1, len = 0, s = '', chunkSize = 128,
  				chunk = String.fromCharCode.apply( null, new Uint16Array( buffer.subarray( p, p + chunkSize ) ) )
  			;
  			while ( ( 0 > ( i = chunk.indexOf( NEWLINE ) ) ) && ( len < lineLimit ) && ( p < buffer.byteLength ) ) {
  
  				s += chunk; len += chunk.length;
  				p += chunkSize;
  				chunk += String.fromCharCode.apply( null, new Uint16Array( buffer.subarray( p, p + chunkSize ) ) );
  
  			}
  
  			if ( - 1 < i ) {
  
  				/*for (i=l-1; i>=0; i--) {
  					byteCode = m.charCodeAt(i);
  					if (byteCode > 0x7f && byteCode <= 0x7ff) byteLen++;
  					else if (byteCode > 0x7ff && byteCode <= 0xffff) byteLen += 2;
  					if (byteCode >= 0xDC00 && byteCode <= 0xDFFF) i--; //trail surrogate
  				}*/
  				if ( false !== consume ) buffer.pos += len + i + 1;
  				return s + chunk.slice( 0, i );
  
  			}
  			return false;
  
  		},
  
  		/* minimal header reading.  modify if you want to parse more information */
  		RGBE_ReadHeader = function ( buffer ) {
  
  			var line, match,
  
  				// regexes to parse header info fields
  				magic_token_re = /^#\?(\S+)$/,
  				gamma_re = /^\s*GAMMA\s*=\s*(\d+(\.\d+)?)\s*$/,
  				exposure_re = /^\s*EXPOSURE\s*=\s*(\d+(\.\d+)?)\s*$/,
  				format_re = /^\s*FORMAT=(\S+)\s*$/,
  				dimensions_re = /^\s*\-Y\s+(\d+)\s+\+X\s+(\d+)\s*$/,
  
  				// RGBE format header struct
  				header = {
  
  					valid: 0, /* indicate which fields are valid */
  
  					string: '', /* the actual header string */
  
  					comments: '', /* comments found in header */
  
  					programtype: 'RGBE', /* listed at beginning of file to identify it after "#?". defaults to "RGBE" */
  
  					format: '', /* RGBE format, default 32-bit_rle_rgbe */
  
  					gamma: 1.0, /* image has already been gamma corrected with given gamma. defaults to 1.0 (no correction) */
  
  					exposure: 1.0, /* a value of 1.0 in an image corresponds to <exposure> watts/steradian/m^2. defaults to 1.0 */
  
  					width: 0, height: 0 /* image dimensions, width/height */
  
  				};
  
  			if ( buffer.pos >= buffer.byteLength || ! ( line = fgets( buffer ) ) ) {
  
  				return rgbe_error( rgbe_read_error, "no header found" );
  
  			}
  			/* if you want to require the magic token then uncomment the next line */
  			if ( ! ( match = line.match( magic_token_re ) ) ) {
  
  				return rgbe_error( rgbe_format_error, "bad initial token" );
  
  			}
  			header.valid |= RGBE_VALID_PROGRAMTYPE;
  			header.programtype = match[ 1 ];
  			header.string += line + "\n";
  
  			while ( true ) {
  
  				line = fgets( buffer );
  				if ( false === line ) break;
  				header.string += line + "\n";
  
  				if ( '#' === line.charAt( 0 ) ) {
  
  					header.comments += line + "\n";
  					continue; // comment line
  
  				}
  
  				if ( match = line.match( gamma_re ) ) {
  
  					header.gamma = parseFloat( match[ 1 ], 10 );
  
  				}
  				if ( match = line.match( exposure_re ) ) {
  
  					header.exposure = parseFloat( match[ 1 ], 10 );
  
  				}
  				if ( match = line.match( format_re ) ) {
  
  					header.valid |= RGBE_VALID_FORMAT;
  					header.format = match[ 1 ];//'32-bit_rle_rgbe';
  
  				}
  				if ( match = line.match( dimensions_re ) ) {
  
  					header.valid |= RGBE_VALID_DIMENSIONS;
  					header.height = parseInt( match[ 1 ], 10 );
  					header.width = parseInt( match[ 2 ], 10 );
  
  				}
  
  				if ( ( header.valid & RGBE_VALID_FORMAT ) && ( header.valid & RGBE_VALID_DIMENSIONS ) ) break;
  
  			}
  
  			if ( ! ( header.valid & RGBE_VALID_FORMAT ) ) {
  
  				return rgbe_error( rgbe_format_error, "missing format specifier" );
  
  			}
  			if ( ! ( header.valid & RGBE_VALID_DIMENSIONS ) ) {
  
  				return rgbe_error( rgbe_format_error, "missing image size specifier" );
  
  			}
  
  			return header;
  
  		},
  
  		RGBE_ReadPixels_RLE = function ( buffer, w, h ) {
  
  			var data_rgba, offset, pos, count, byteValue,
  				scanline_buffer, ptr, ptr_end, i, l, off, isEncodedRun,
  				scanline_width = w, num_scanlines = h, rgbeStart
  			;
  
  			if (
  				// run length encoding is not allowed so read flat
  				( ( scanline_width < 8 ) || ( scanline_width > 0x7fff ) ) ||
  				// this file is not run length encoded
  				( ( 2 !== buffer[ 0 ] ) || ( 2 !== buffer[ 1 ] ) || ( buffer[ 2 ] & 0x80 ) )
  			) {
  
  				// return the flat buffer
  				return new Uint8Array( buffer );
  
  			}
  
  			if ( scanline_width !== ( ( buffer[ 2 ] << 8 ) | buffer[ 3 ] ) ) {
  
  				return rgbe_error( rgbe_format_error, "wrong scanline width" );
  
  			}
  
  			data_rgba = new Uint8Array( 4 * w * h );
  
  			if ( ! data_rgba || ! data_rgba.length ) {
  
  				return rgbe_error( rgbe_memory_error, "unable to allocate buffer space" );
  
  			}
  
  			offset = 0; pos = 0; ptr_end = 4 * scanline_width;
  			rgbeStart = new Uint8Array( 4 );
  			scanline_buffer = new Uint8Array( ptr_end );
  
  			// read in each successive scanline
  			while ( ( num_scanlines > 0 ) && ( pos < buffer.byteLength ) ) {
  
  				if ( pos + 4 > buffer.byteLength ) {
  
  					return rgbe_error( rgbe_read_error );
  
  				}
  
  				rgbeStart[ 0 ] = buffer[ pos ++ ];
  				rgbeStart[ 1 ] = buffer[ pos ++ ];
  				rgbeStart[ 2 ] = buffer[ pos ++ ];
  				rgbeStart[ 3 ] = buffer[ pos ++ ];
  
  				if ( ( 2 != rgbeStart[ 0 ] ) || ( 2 != rgbeStart[ 1 ] ) || ( ( ( rgbeStart[ 2 ] << 8 ) | rgbeStart[ 3 ] ) != scanline_width ) ) {
  
  					return rgbe_error( rgbe_format_error, "bad rgbe scanline format" );
  
  				}
  
  				// read each of the four channels for the scanline into the buffer
  				// first red, then green, then blue, then exponent
  				ptr = 0;
  				while ( ( ptr < ptr_end ) && ( pos < buffer.byteLength ) ) {
  
  					count = buffer[ pos ++ ];
  					isEncodedRun = count > 128;
  					if ( isEncodedRun ) count -= 128;
  
  					if ( ( 0 === count ) || ( ptr + count > ptr_end ) ) {
  
  						return rgbe_error( rgbe_format_error, "bad scanline data" );
  
  					}
  
  					if ( isEncodedRun ) {
  
  						// a (encoded) run of the same value
  						byteValue = buffer[ pos ++ ];
  						for ( i = 0; i < count; i ++ ) {
  
  							scanline_buffer[ ptr ++ ] = byteValue;
  
  						}
  						//ptr += count;
  
  					} else {
  
  						// a literal-run
  						scanline_buffer.set( buffer.subarray( pos, pos + count ), ptr );
  						ptr += count; pos += count;
  
  					}
  
  				}
  
  
  				// now convert data from buffer into rgba
  				// first red, then green, then blue, then exponent (alpha)
  				l = scanline_width; //scanline_buffer.byteLength;
  				for ( i = 0; i < l; i ++ ) {
  
  					off = 0;
  					data_rgba[ offset ] = scanline_buffer[ i + off ];
  					off += scanline_width; //1;
  					data_rgba[ offset + 1 ] = scanline_buffer[ i + off ];
  					off += scanline_width; //1;
  					data_rgba[ offset + 2 ] = scanline_buffer[ i + off ];
  					off += scanline_width; //1;
  					data_rgba[ offset + 3 ] = scanline_buffer[ i + off ];
  					offset += 4;
  
  				}
  
  				num_scanlines --;
  
  			}
  
  			return data_rgba;
  
  		}
  	;
  
  	var byteArray = new Uint8Array( buffer );
  	byteArray.pos = 0;
  	var rgbe_header_info = RGBE_ReadHeader( byteArray );
  
  	if ( RGBE_RETURN_FAILURE !== rgbe_header_info ) {
  
  		var w = rgbe_header_info.width,
  			h = rgbe_header_info.height,
  			image_rgba_data = RGBE_ReadPixels_RLE( byteArray.subarray( byteArray.pos ), w, h )
  		;
  		if ( RGBE_RETURN_FAILURE !== image_rgba_data ) {
  
  			if ( this.type === THREE.UnsignedByteType ) {
  
  				var data = image_rgba_data;
  				var format = THREE.RGBEFormat; // handled as THREE.RGBAFormat in shaders
  				var type = THREE.UnsignedByteType;
  
  			} else if ( this.type === THREE.FloatType ) {
  
  				var RGBEByteToRGBFloat = function ( sourceArray, sourceOffset, destArray, destOffset ) {
  
  					var e = sourceArray[ sourceOffset + 3 ];
  					var scale = Math.pow( 2.0, e - 128.0 ) / 255.0;
  
  					destArray[ destOffset + 0 ] = sourceArray[ sourceOffset + 0 ] * scale;
  					destArray[ destOffset + 1 ] = sourceArray[ sourceOffset + 1 ] * scale;
  					destArray[ destOffset + 2 ] = sourceArray[ sourceOffset + 2 ] * scale;
  
  				};
  
  				var numElements = ( image_rgba_data.length / 4 ) * 3;
  				var floatArray = new Float32Array( numElements );
  
  				for ( var j = 0; j < numElements; j ++ ) {
  
  					RGBEByteToRGBFloat( image_rgba_data, j * 4, floatArray, j * 3 );
  
  				}
  
  				var data = floatArray;
  				var format = THREE.RGBFormat;
  				var type = THREE.FloatType;
  
  
  			} else {
  
  				console.error( 'THREE.RGBELoader: unsupported type: ', this.type );
  
  			}
  
  			return {
  				width: w, height: h,
  				data: data,
  				header: rgbe_header_info.string,
  				gamma: rgbe_header_info.gamma,
  				exposure: rgbe_header_info.exposure,
  				format: format,
  				type: type
  			};
  
  		}
  
  	}
  
  	return null;
  
  };
  
  THREE.RGBELoader.prototype.setType = function ( value ) {
  
  	this.type = value;
  	return this;
  
  };
  
  THREE.RGBELoader.prototype.load = function ( url, onLoad, onProgress, onError ) {
  
  	function onLoadCallback( texture, texData ) {
  
  		switch ( texture.type ) {
  
  			case THREE.UnsignedByteType:
  
  				texture.encoding = THREE.RGBEEncoding;
  				texture.minFilter = THREE.NearestFilter;
  				texture.magFilter = THREE.NearestFilter;
  				texture.generateMipmaps = false;
  				texture.flipY = true;
  				break;
  
  			case THREE.FloatType:
  
  				texture.encoding = THREE.LinearEncoding;
  				texture.minFilter = THREE.LinearFilter;
  				texture.magFilter = THREE.LinearFilter;
  				texture.generateMipmaps = false;
  				texture.flipY = true;
  				break;
  
  		}
  
  		if ( onLoad ) onLoad( texture, texData );
  
  	}
  
  	return THREE.DataTextureLoader.prototype.load.call( this, url, onLoadCallback, onProgress, onError );
  
  };
  