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    Imagick::setProgressMonitor

    (PECL imagick 3 >= 3.3.0)

    Imagick::setProgressMonitor — Set a callback to be called during processing

    説明

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

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

    パラメータ

    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
    警告

    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.

    戻り値

    成功した場合に true を返します。

    例

    例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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