function render_svg($filepath, $w, $h, DOMElement $node)
{
static $svgRenderCache = array();
if (!isset($svgRenderCache[$filepath . $w . $h])) {
$filename = tempnam(dirname($filepath), "ca_dompdf_img_");
$svg = file_get_contents($filepath);
$renderSupersample = DOMPDF_SVG_SUPERSAMPLE;
$rsvg = rsvg_create($svg);
$dim = $rsvg->getDimensions();
if ($node) {
$viewBox = explode(' ', $node->getAttribute('viewbox'));
if (count($viewBox) == 4) {
list($innerx, $innery, $innerwidth, $innerheight) = $viewBox;
} else {
list($innerx, $innery, $innerwidth, $innerheight) = [0, 0, $dim['width'], $dim['height']];
}
} else {
list($innerx, $innery, $innerwidth, $innerheight) = [0, 0, $dim['width'], $dim['height']];
}
$scaleW = $w / $innerwidth;
$scaleH = $h / $innerheight;
$matrixScale = min($scaleW, $scaleH);
$csf = cairo_image_surface_create(CairoFormat::ARGB32, floor($w * $renderSupersample), floor($h * $renderSupersample));
$cctx = new CairoContext($csf);
$cctx->setMatrix(CairoMatrix::initScale($renderSupersample * $matrixScale, $renderSupersample * $matrixScale));
$cctx->translate(-$innerx, $innery);
$rsvg->render($cctx);
$csf->writeToPng($filename);
return $svgRenderCache[$filepath . $w . $h] = $filename;
} else {
return $svgRenderCache[$filepath . $w . $h];
}
}
