# aardio 范例: WebView2 - WebP 图像转 JPG 格式
```aardio
//转换 WebP 图像
import fsys;
import process;
import win.ui;
/*DSG{{*/
var winform = win.form(text="WebView2 - WebP 图像转 JPG 格式";right=966;bottom=622)
winform.add(
btnCallJavaScript={cls="button";text="转换图像";left=615;top=537;right=869;bottom=606;color=0xD77800;db=1;dr=1;font=LOGFONT(h=-14);note="WebP 图像转 JPG 格式";z=2};
static={cls="static";left=8;top=6;right=956;bottom=503;db=1;dl=1;dr=1;dt=1;z=1}
)
/*}}*/
import web.view;
var wb = web.view(winform.static);
wb.external = {
OnConvertCompleted = function(byteArray,savePath){
//JS 数组转换为 buffer
var buf = raw.buffer({BYTE data[]=byteArray})
//写入 buffer 到文件
io.file.write(savePath,buf);
import process.imageView;
process.imageView(savePath);
}
}
wb.html = /**
**/
import fsys.dlg;
import inet.urlData;
winform.btnCallJavaScript.oncommand = function(id,event){
var path = fsys.dlg.open("*.webp|*.webp||","请指定要转换的图像");
if(!path) return;
var buf = string.loadBuffer(path);
wb.xcall("convertImage",buf,fsys.path.replaceExt(path,".jpg"));
}
/*
也可以这样转换：
import process.ffmpeg;
var ffmpeg = process.ffmpeg("/",
"-y","-i","~/examples/Graphics/.gdip.jpg","out.webp");
*/
winform.show();
win.loopMessage();
```