ImageMagick等效于Box shadow CSS属性

<?php
  /* Read the image into the object */
  $im = new Imagick( 'a.jpg' );
  $im->setImageFormat("png");
  /* Make the image a little smaller, maintain aspect ratio */
  $im->thumbnailImage( 200, null );
  /* Clone the current object */
  $shadow = $im->clone();
  /* Set image background color to black (this is the color of the shadow) */
  $shadow->setImageBackgroundColor( new ImagickPixel( 'black' ) );
  /* Create the shadow */
  $shadow->shadowImage( 80, 3, 5, 5 );
  /* Imagick::shadowImage only creates the shadow. That is why the original image is composited over it */
  $shadow->compositeImage( $im, Imagick::COMPOSITE_OVER, 0, 0 );
 /* Display the image */
 header( "Content-Type: image/jpeg" );
 echo $shadow;
?>

您还可以看到bash脚本的imagemagik