Imagick::setProgressMonitor

(PECL imagick 3 >= 3.3.0)

Imagick::setProgressMonitorSet a callback to be called during processing

Description

public Imagick::setProgressMonitor(callable $callback): bool

Set a callback that will be called during the processing of the Imagick image.

Liste de paramètres

callback

The progress function to call. It should return true if image processing should continue, or false if it should be cancelled. The offset parameter indicates the progress and the span parameter indicates the total amount of work needed to be done.

callback ( mixed $offset , mixed $span ): bool
Attention

The values passed to the callback function are not consistent. In particular the span parameter can increase during image processing. Because of this calculating the percentage complete of an image operation is not trivial.

Valeurs de retour

Retourne true en cas de succès.

Exemples

Exemple #1 Imagick::setProgressMonitor()

<?php
$abortReason
= null;

try {
$imagick = new \Imagick(realpath($this->control->getImagePath()));
$startTime = time();

$callback = function ($offset, $span) use ($startTime, &$abortReason) {
if (((
100 * $offset) / $span) > 20) {
$abortReason = "Processing reached 20%";
return
false;
}

$nowTime = time();

if (
$nowTime - $startTime > 5) {
$abortReason = "Image processing took more than 5 seconds";
return
false;
}
if ((
$offset % 5) == 0) {
echo
"Progress: $offset / $span <br/>";
}
return
true;
};

$imagick->setProgressMonitor($callback);

$imagick->waveImage(2, 15);

echo
"Data len is: ".strlen($imagick->getImageBlob());
}
catch(
\ImagickException $e) {
if (
$abortReason != null) {
echo
"Image processing was aborted: ".$abortReason."<br/>";
}
else {
echo
"ImagickException caught: ".$e->getMessage()." Exception type is ".get_class($e);
}
}

?>

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