RSVG with scaling

karate.php

<?php

$width = $height = 1000;

if (isset($_GET['width'])) {
	$width = (int) $_GET['width'];
}

if (isset($_GET['height'])) {
	$height = (int) $_GET['height'];
}

header("Content-Type: image/png");
$r = Rsvg::createFromFile('karate.svg');
$dimensions = $r->getDimensions();
$s = new CairoImageSurface(CairoFormat::ARGB32, $width, $height);
$c = new CairoContext($s);
$c->scale($width / $dimensions['width'], $height / $dimensions['height']);

$r->render($c);
$s->writeToPng("php://output");