psdw简单的javascript psd编写器用法var psdBlob = psdw ( { width /* required */ : 1 , // pixel unit height /* required */ : 1 , // pixel unit flattenedImageData /* required */ : new Uint8ClampedArray ( [ 0 , 0 ] ) , layers : [ { // bottom layer (background) name /* required */ : 'psdw layer' , imageData /* required */ : new Uint8ClampedArray ( [