Helma的简单图片处理

使用Helma自带的Image对象进行简单的图片处理。

 

看不懂的参考http://adele.helma.org/download/helma/apidocs/api/index.html

 

app.addRepository('modules/helma/Image.js');

function main_action(){
	var word="";
	if(req.queryParams.w){
		word=req.queryParams.w;
	}else{
		word="CraneKing!";
	}
//img url
	var img = new Image("apps/imgx/img/nobita.jpg");
	img.setColor(204, 0, 0);
	img.setFont("sansserif", 1, 16);
	img.drawString(word,28,30);
//out put image
	var img_out=new Packages.helma.image.imageio.ImageIOGenerator();
// servlet output stream
	var outps=res.servletResponse.getOutputStream();
//do put image  (image,stream,mimeType,品质image quality,alpha)
	img_out.write(img,outps,"image/jpeg",0.75,true);
}