function set_surface_pattern($x, $y)
{
global $con, $sur, $width, $height;
$wi = floor(0.6 * $width);
$he = floor(0.6 * $height);
$x += 0.2 * $width;
$y += 0.2 * $height;
$s = $sur->createSimilar(CairoContent::COLOR_ALPHA, $wi, $he);
$con2 = new CairoContext($s);
$con2->setSourceRgb(1, 0, 0);
$con2->paint();
$con2->setSourceRgb(1, 1, 1);
$con2->arc(0.5 * $wi, 0.5 * $he, 0.5 * $he, 0, 2 * M_PI);
$con2->fill();
$s->writeToPng(dirname(__FILE__) . "/temp1.png");
$con->setSourceSurface($s, $x, $y);
unset($s);
//unset($con2);
}
<?php
$sur = new CairoImageSurface(CairoFormat::ARGB32, 120, 100);
$con = new CairoContext($sur);
$con->setSourceRgb(1, 1, 1);
$con->paint();
$con->setSourceRgb(0, 0, 0);
$con->setMiterLimit(100000);
for ($xscale = 1; $xscale <= 1000; $xscale += 999) {
for ($yscale = 1; $yscale <= 1000; $yscale += 999) {
//$max_scale = ($xscale > $yscale) ? $xscale : $yscale;
$max_scale = max($xscale, $yscale);
$con->save();
if ($xscale > 1) {
$con->translate(50, 0);
}
if ($yscale > 1) {
$con->translate(0, 50);
}
$con->scale($xscale, $yscale);
$con->setLineWidth(10.0 / $max_scale);
$con->moveTo(10.0 / $xscale, 10.0 / $yscale);
$con->lineTo(40.0 / $xscale, 10.0 / $yscale);
$con->lineTo(10.0 / $xscale, 30.0 / $yscale);
$con->stroke();
$con->restore();
}
}
$sur->writeToPng(dirname(__FILE__) . "/miter-precision-php.png");
<?php $sur = new CairoImageSurface(CairoFormat::ARGB32, 36, 36); $con = new CairoContext($sur); $s = new CairoImageSurface(CairoFormat::ARGB32, 2, 2); $con2 = new CairoContext($s); $con2->setSourceRgb(1, 0, 0); $con2->paint(); $con2->setSourceRgb(0, 0, 1); $con2->rectangle(0, 1, 1, 1); $con2->rectangle(1, 0, 1, 1); $con2->fill(); $con->setSourceRgb(0, 0, 0); $con->paint(); $con->save(); $con->translate(3, 3); $con->scale(10, 10); $con->translate(0.5, 0.5); $con->setSourceSurface($s, 0, 0); $con->paint(); $con->restore(); $sur->writeToPng(dirname(__FILE__) . "/filter-bilinear-extents-php.png"); ?>
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
$c->setSourceRgb(0, 0, 0);
$c->paint();
$c->setLineWidth(1);
$c->setSourceRgb(1, 1, 1);
for ($r = 50; $r > 0; $r -= 10) {
$c->arc(50, 50, $r, 0, 2 * M_PI);
$c->stroke();
$c->fill();
}
$s->writeToPng(dirname(__FILE__) . '/CairoContext__arc.png');
$con->lineTo($x + $width, $y);
$con->lineTo($x, $y + $height);
$con->clip();
switch ($i) {
case 0:
$wi = floor($width * 0.9);
$he = floor($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;
