Basic usage

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Imagick makes image manipulation in PHP extremely easy through an OO interface. Here is a quick example on how to make a thumbnail:

Example #1 Creating a thumbnail in Imagick

  <?php

header ( 'Content-type: image/jpeg' );

 $image  = new  Imagick ( 'image.jpg' );

 // If 0 is provided as a width or height parameter,
// aspect ratio is maintained
 $image -> thumbnailImage ( 100 ,  0 );

echo  $image ;

 ?>

Using SPL and other OO features supported in Imagick, it can be simple to resize all files in a directory (useful for batch resizing large digital camera images to be web viewable). Here we use resize, as we might want to retain certain meta-data:

Example #2 Make a thumbnail of all JPG files in a directory

  <?php

$images  = new  Imagick ( glob ( 'images
 $im  = new  Imagick ( "test.png" );

 
 $im -> thumbnailImage ( 200 ,  null );

 
 $im -> borderImage (new  ImagickPixel ( "white" ),  5 ,  5 );

 
 $reflection  =  $im -> clone ();
 $reflection -> flipImage ();

 
 $gradient  = new  Imagick ();

 
 $gradient -> newPseudoImage ( $reflection -> getImageWidth () +  10 ,  $reflection -> getImageHeight () +  10 ,  "gradient:transparent-black" );

 
 $reflection -> compositeImage ( $gradient ,  imagick :: COMPOSITE_OVER ,  0 ,  0 );

 
 $reflection -> setImageOpacity (  0.3  );

 
 $canvas  = new  Imagick ();

 
 $width  =  $im -> getImageWidth () +  40 ;
 $height  = ( $im -> getImageHeight () *  2 ) +  30 ;
 $canvas -> newImage ( $width ,  $height , new  ImagickPixel ( "black" ));
 $canvas -> setImageFormat ( "png" );

 
 $canvas -> compositeImage ( $im ,  imagick :: COMPOSITE_OVER ,  20 ,  10 );
 $canvas -> compositeImage ( $reflection ,  imagick :: COMPOSITE_OVER ,  20 ,  $im -> getImageHeight () +  10 );

 
 header ( "Content-Type: image/png" );
echo  $canvas ;
 ?>

以上例程的输出类似于：

Output of example : Creating a reflection of an image

This example illustrates how to use fill patterns during drawing.

Example #4 Filling text with gradient

  <?php

 
 $im  = new  Imagick ();

 
 $im -> newPseudoImage ( 50 ,  50 ,  "gradient:red-black" );

 
 $draw  = new  ImagickDraw ();

 
 $draw -> pushPattern ( 'gradient' ,  0 ,  0 ,  50 ,  50 );

 
 $draw -> composite ( Imagick :: COMPOSITE_OVER ,  0 ,  0 ,  50 ,  50 ,  $im );

 
 $draw -> popPattern ();

 
 $draw -> setFillPatternURL ( '#gradient' );

 
 $draw -> setFontSize ( 52 );

 
 $draw -> annotation ( 20 ,  50 ,  "Hello World!" );

 
 $canvas  = new  Imagick ();
 $canvas -> newImage ( 350 ,  70 ,  "white" );

 
 $canvas -> drawImage ( $draw );

 
 $canvas -> borderImage ( 'black' ,  1 ,  1 );

 
 $canvas -> setImageFormat ( 'png' );

 
 header ( "Content-Type: image/png" );
echo  $canvas ;
 ?>

以上例程的输出类似于：

Output of example : Filling text with gradient

Working with animated GIF images

Example #5 Read in GIF image and resize all frames

  <?php

 
 $im  = new  Imagick ( "example.gif" );

 
 foreach ( $im  as  $frame ) {
     
     $frame -> thumbnailImage ( 50 ,  50 );

     
     $frame -> setImagePage ( 50 ,  50 ,  0 ,  0 );
}

 
 $im -> writeImages ( "example_small.gif" ,  true );
 ?>

Working with ellipse primitive and custom fonts

Example #6 Create a PHP logo

  <?php
 
 $width  =  400 ;
 $height  =  210 ;

 
 $img  = new  Imagick ();
 $img -> newImage ( $width ,  $height , new  ImagickPixel ( 'transparent' ));

 
 $draw  = new  ImagickDraw ();
 
 $draw -> setFillColor ( '#777bb4' );
 
 $draw -> ellipse ( $width  /  2 ,  $height  /  2 ,  $width  /  2 ,  $height  /  2 ,  0 ,  360 );
 
 $img -> drawImage ( $draw );

 
 $draw -> setFillColor ( 'black' );
 
 $draw -> setStrokeColor ( 'white' );
 
 $draw -> setStrokeWidth ( 2 );
 
 $draw -> setTextKerning (- 8 );
 
 $draw -> setFont ( 'Handel Gothic.ttf' );
 $draw -> setFontSize ( 150 );
 
 $draw -> setGravity ( Imagick :: GRAVITY_CENTER );

 
 $img -> annotateImage ( $draw ,  0 , - 10 ,  0 ,  'php' );
 $img -> setImageFormat ( 'png' );

 
 header ( 'Content-Type: image/png' );
echo  $img ;
 ?>

以上例程的输出类似于：

用户评论:

[#1] vokseli [2014-08-06 07:24:49]

Be careful when loading multiple images by passing an array to a new Imagick object. This is from Example #2:

<?php $images = new Imagick(glob('images $reflection = $im->clone(); $reflection->flipImage(); ---------------------------------------------------- it was using the Imagick::clone function This function has been DEPRECATED as of imagick 3.1.0 in favour of using the clone keyword. use below code instead: ---------------------------------------------------- $reflection = clone $im; $reflection->flipImage(); ---------------------------------------------------- http://php.net/manual/en/imagick.clone.php