how to change resolution and scale svg when zoomed

[Sara]

hi, 

I'm trying to load SVGs in, and scale them 

var svgRes = new PIXI.resources.SVGResource("r001.svg", {scale:2});
var tex = PIXI.Texture.from(svgRes);
var sprite = new PIXI.Sprite(tex);
stage.addChild(sprite);

how can I change the scale based on zomm, while not svg, blueray?