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PHP Manual || Imagick

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Imagick::setProgressMonitorDescription

Description

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

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

Parameters

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
Caution

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.

Return Values

Returns TRUE on success.

Examples

Example #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);
            }
        }

?>



PHP Manual || Imagick