note 91688 added to function.imagickdraw-circle
| From: | christian dot reinecke at web dot de | Date: | Tue, 23 Jun 2009 13:31:47 +0000 |
| Subject: | note 91688 added to function.imagickdraw-circle | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-157264@lists.php.net to get a copy of this message | ||
This example creates a circle, one part green, one part red using kind of masks for transparency,
which you might know from Photoshop. drawImage() is a quick helper for debug output (see code
comments) to help you reproduce the process.
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function drawImage(Imagick $im) {
$im->setCompressionQuality(100);
$im->setImageFormat("jpg");
header("Content-Type: image/" . $im->getImageFormat());
echo $im;
exit;
}
// define red/green layer
$layer1 = new Imagick();
$layer1->newImage(100, 100, "none");
$red = new ImagickDraw();
$red->setFillColor("#FF0000");
$red->rectangle(0, 0, 50, 100);
$green = new ImagickDraw();
$green->setFillColor("#00FF00");
$green->rectangle(50, 0, 100, 100);
$layer1->drawImage($red);
$layer1->drawImage($green);
# debug output: two rectangles
# drawImage($layer1);
// define circle mask
$layer2 = new Imagick();
$layer2->newImage(100, 100, "none");
$circle = new ImagickDraw();
$circle->setFillColor("#FFFFFF");
$circle->circle(50, 50, 48, 98);
$layer2->drawImage($circle);
# debug output: the mask
# drawImage($layer2);
// use mask
$layer1->compositeImage($layer2, Imagick::COMPOSITE_DSTIN, 0, 0);
# debug output: the result of our mask usage
# drawImage($layer1);
// define background
$layer3 = new Imagick();
$layer3->newImage(100, 100, "none");
$layer3->compositeImage($layer1, Imagick::COMPOSITE_DEFAULT, 0, 0);
// define ring as background
$layer4 = new Imagick();
$layer4->newImage(100, 100, "white"); // this is our background
$ring1 = new ImagickDraw();
$ring1->setFillColor("black");
$ring1->circle(50, 50, 50, 99);
$layer4->drawImage($ring1);
# debug output: this is a black circle (not our mask, which is similar, but a little bit smaller)
# drawImage($layer4);
// use black circle as background (this creates our circle border)
$layer4->compositeImage($layer3, Imagick::COMPOSITE_DEFAULT, 0, 0);
# debug output: here we go with our circle border
# drawImage($layer4);
// draw separator between red and green rectangle (now semi circles)
$line = new ImagickDraw();
$line->setStrokeWidth(1);
$line->setStrokeColor("black");
$line->line(50, 1, 50, 99);
// add our separator line
$layer4->drawImage($line);
drawImage($layer4);
--
To understand how the COMPOSITE_* constants effect the image merging process, see here:
http://www.imagemagick.org/Usage/compose/#duff-porter
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Server IP: 212.124.37.9
Probable Submitter: 89.244.130.51
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Manual Page -- http://www.php.net/manual/en/function.imagickdraw-circle.php
Edit -- https://master.php.net/note/edit/91688
Del: integrated -- https://master.php.net/note/delete/91688/integrated
Del: useless -- https://master.php.net/note/delete/91688/useless
Del: bad code -- https://master.php.net/note/delete/91688/bad+code
Del: spam -- https://master.php.net/note/delete/91688/spam
Del: non-english -- https://master.php.net/note/delete/91688/non-english
Del: in docs -- https://master.php.net/note/delete/91688/in+docs
Del: other reasons-- https://master.php.net/note/delete/91688
Reject -- https://master.php.net/note/reject/91688
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