Imagick::setProgressMonitor

(Информация о версии неизвестна, возможно, только в SVN)

Imagick::setProgressMonitorDescription

Описание

public void Imagick::setProgressMonitor ( callable $callback )

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

Список параметров

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.

bool callback ( mixed $offset , mixed $span )
Предостережение

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.

Возвращаемые значения

Примеры

Пример #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(215);

            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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