php使用imagick给图片加水印的方法

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<?php

$image = new Imagick();

$image->readImage("original.jpg");

$watermark = new Imagick();

$watermark->readImage("/data/mark.png");

// how big are the images?

$iWidth = $image->getImageWidth();

$iHeight = $image->getImageHeight();

$wWidth = $watermark->getImageWidth();

$wHeight = $watermark->getImageHeight();

if ($iHeight < $wHeight || $iWidth < $wWidth) {

// resize the watermark

$watermark->scaleImage($iWidth, $iHeight);

// get new size

$wWidth = $watermark->getImageWidth();

$wHeight = $watermark->getImageHeight();

}

// calculate the position

$x = ($iWidth – $wWidth);

$y = ($iHeight – $wHeight);

$image->compositeImage($watermark, imagick::COMPOSITE_OVER, $x, $y);

header("Content-Type: image/" . $image->getImageFormat());

echo $image;

?>