Version 4.6.0

system/Image/Gd.php

@@ -148,6 +148,13 @@ class _Gd extends \IPS\Image
 
 				imagepng( $this->image, NULL, $quality );
 			break;
+
+			case 'webp':
+				$quality	= \IPS\Settings::i()->image_jpg_quality ?: 85;
+
+				imagewebp( $this->image, NULL, $quality );
+			break;
+
 		}
 		return ob_get_clean();
 	}
@@ -390,4 +397,21 @@ class _Gd extends \IPS\Image
 	{
 		return (bool) \function_exists( 'imagettfbbox' );
 	}
+	
+	/**
+	 * Return an array of supported extensions
+	 *
+	 * @return	array
+	 */
+	public static function supportedExtensions()
+	{
+		$extensions = static::$imageExtensions;
+
+		if( isset( gd_info()['WebP Support'] ) and gd_info()['WebP Support'] )
+		{
+			$extensions[] = 'webp';
+		}
+
+		return $extensions;
+	}
 }