$he = floor($height * 0.9);
$x += 0.05 * $width;
$y += 0.05 * $height;
//$stemp = $con->get_group_target();
$msur = $sur->createSimilar(CairoContent::ALPHA, $wi, $he);
$c2 = new CairoContext($msur);
$c2->save();
$c2->setSourceRgba(0, 0, 0, 0);
$c2->setOperator(CairoOperator::SOURCE);
$c2->paint();
$c2->restore();
$c2->setSourceRgb(1, 1, 1);
$c2->arc(0.5 * $wi, 0.5 * $he, 0.45 * $he, 0, 2 * M_PI);
$c2->fill();
//unset($c2);
$con->maskSurface($msur, $x, $y);
//unset($msur);
//unset($stemp);
break;
case 1:
$con->setFontSize(0.9 * $height);
$ext = $con->textExtents("FG");
$con->moveTo($x + floor(($width - $ext["width"]) / 2 + 0.5) - $ext["x_bearing"], $y + floor(($height - $ext["height"]) / 2 + 0.5) - $ext["y_bearing"]);
$con->showText("FG");
break;
case 2:
$wi = floor($width * 9 / 10);
$he = floor($height * 9 / 10);
$x += 0.05 * $width;
$y += 0.05 * $height;
$con->newPath();
$con = new CairoContext($sur);
$con->setSourceRgb(0, 0, 1);
$con->paint();
$s = new CairoImageSurface(CairoFormat::A1, 6400, 20);
$stride = $s->getStride();
$height = $s->getHeight();
$width = $s->getWidth();
$data = "";
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < ($width + 7) / 8; $x++) {
$data = $data . chr(5);
}
}
$s->createForData($data, CairoFormat::A1, $width, $height, $stride);
$con->setSourceRgb(1, 0, 0);
$con->maskSurface($s);
$con->fill();
$s = new CairoImageSurface(CairoFormat::A1, 20, 6400);
$stride = $s->getStride();
$height = $s->getHeight();
$width = $s->getWidth();
$data = "";
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < ($width + 7) / 8; $x++) {
$data = $data . chr(80);
}
}
$s->createForData($data, CairoFormat::A1, $width, $height, $stride);
$con->setSourceRgb(0, 1, 0);
$con->maskSurface($s, 0, 0);
$sur->writeToPng(dirname(__FILE__) . "/large-source-php.png");
<?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);
$con->maskSurface($s, 0, 0);
$con->restore();
$con->maskSurface($s, 4, 4);
//$mat = new CairoMatrix();
$con->translate(2, 2);
//$pat->setMatrix($mat);
$con->maskSurface($s, 4, 4);
$sur->writeToPng(dirname(__FILE__) . "/mask-surface-ctm-php.png");
?>
