svg转图片

$f = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>'.$res['svgXml'];
           $im = new \Imagick();
         $im->readImageBlob($f);
            $im->setImageFormat("png");
            $srcImage = $im->getImageGeometry(); //获取源图片宽和高
            $im->resizeImage($srcImage['width'], $srcImage['height'], \imagick::FILTER_LANCZOS, 1, false);
            $fileName = '/tmp/venue_svg_'.time().'_'.$venue_id.'.png';
            $im->writeImage($fileName);
            $im->clear();
            $post = [
                'name' => $name,
                'base64_str' => 'data:image/jpg/png/gif;base64,'. base64_encode(file_get_contents('/home/zhangcunchao/webroot/em-piao/public/img/1.png')),
            ];
            $image = app(SharedService::class)->uploadImageBase64($post);