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Gmagick::setCompressionQuality — Sets the object's default compression quality
Sets the object's default compression quality.
quality
The Gmagick object on success
エラー時に GmagickException をスローします。
例1 Gmagick::setCompressionQuality()
<?php
$gm = new Gmagick();
$gm->read("magick:rose");
$gm->setCompressionQuality(2);
?>