var imgWHRatio=this.width/this.height;var expectWHRatio=ew/eh;if(this.width>ew&&this.height>eh){if(imgWHRatio<=expectWHRatio){options.img.width=ew;}else{options.img.height=eh;}}
var len=str.length,i=Math.min(Math.floor(bitLen/2),len),cnt=QWT.getRealLen(str.slice(0,i));for(;i<len&&cnt<bitLen;i++){cnt+=1+(str.charCodeAt(i)>255);}