<?php
$sur = new CairoImageSurface(CairoFormat::ARGB32, 10, 10);
$con = new CairoContext($sur);
$data = "";
for ($i = 0; $i < 4; $i++) {
$data = $data . chr(0x80);
$data = $data . chr(0x0);
$data = $data . chr(0x0);
$data = $data . chr(0x0);
}
$s = new CairoImageSurface(CairoFormat::ARGB32, 1, 1);
$s->createForData(data, CairoFormat::ARGB32, 2, 2, 8);
$pat = new CairoSurfacePattern($s);
$con->setSourceRgb(1, 0, 0);
$con->save();
$con->translate(2, 2);
$con->mask($pat);
$con->restore();
$mat = new CairoMatrix();
$mat->translate(-4, -4);
$pat->setMatrix($mat);
$con->mask($pat);
$con->translate(2, 2);
$con->mask($pat);
$sur->writeToPng(dirname(__FILE__) . "/mask-ctm-php.png");
?>
