Imagick::setImageOpacity

(PECL imagick 2.0.0)

Imagick::setImageOpacity — Sets the image opacity level

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Imagick::setImageOpacity ( float $opacity ) : bool

Sets the image to the specified opacity level. �˷�����Imagick����ImageMagick 6.3.1���ϰ汾����ʱ���á� This method operates on all channels, which means that for example opacity value of 0.5 will set all transparent areas to partially opaque. To add transparency to areas that are not already transparent use Imagick::evaluateImage()

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opacity

The level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.

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Example #1 A Imagick::setImageOpacity() example

An example of using Imagick::setImageOpacity()

<?php
/* Create the object */
$image = new Imagick('source.png');

/* Set the opacity */
$image->setImageOpacity(0.7);

/* output the image */
header('Content-type: image/png');
echo $image;

?>