public function __construct(Document $doc, $canvas = null)
{
if (self::DEBUG) {
echo __FUNCTION__ . "\n";
}
$dimensions = $doc->getDimensions();
$w = $dimensions["width"];
$h = $dimensions["height"];
if (!$canvas) {
$canvas = new \PDFlib();
/* all strings are expected as utf8 */
$canvas->set_option("stringformat=utf8");
$canvas->set_option("errorpolicy=return");
/* open new PDF file; insert a file name to create the PDF on disk */
if ($canvas->begin_document("", "") == 0) {
die("Error: " . $canvas->get_errmsg());
}
$canvas->set_info("Creator", "PDFlib starter sample");
$canvas->set_info("Title", "starter_graphics");
$canvas->begin_page_ext($w, $h, "");
}
// Flip PDF coordinate system so that the origin is in
// the top left rather than the bottom left
$canvas->setmatrix(1, 0, 0, -1, 0, $h);
$this->width = $w;
$this->height = $h;
$this->canvas = $canvas;
}
