PHP Unconference Europe 2015

Imagick::optimizeImageLayers

(PECL imagick 2.0.0)

Imagick::optimizeImageLayersRemoves repeated portions of images to optimize

Descrição

bool Imagick::optimizeImageLayers ( void )

Compares each image the GIF disposed forms of the previous image in the sequence. From this it attempts to select the smallest cropped image to replace each frame, while preserving the results of the animation. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

Valor Retornado

Returns TRUE on success.

Erros

Throws ImagickException on error.

Exemplos

Exemplo #1 Using Imagick::optimizeImageLayers()

Reading, optimizing and writing a GIF image

<?php
/* create new imagick object */
$im = new Imagick("test.gif");

/* optimize the image layers */
$im->optimizeImageLayers();

/* write the image back */
$im->writeImages("test_optimized.gif"true);
?>

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f21 dot groups at gmail dot com
1 year ago
In imagick 3.x (have not checked 2.x), this returns an imagemagick object and not a boolean.

<?php

$image
= new Imagick('myanimation.gif');

$image = $image->optimizeImageLayers(); //Does not return a boolean!

$image->writeImage('optimized.gif');
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