Implement Image::sliceAnimation()

[olivervogel]

Slice Animation

public Image::sliceAnimation(int $offset, null|int $length = null): ImageInterface

Extract animation frames based on given values and discard the rest. The offset
parameter can be used to set the starting point of the new animation; all
frames before the offset are discarded. The length parameter is optional. It
specifies how many frames to read after the offset. By default, all frames up
to the end of the animation are read.

Parameters

Name	Type	Description
offset	integer	Starting point of the new animation
length	null or integer	Frames to read after the offset (optional)

Examples

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Gd\Driver;

// create new manager instance with desired driver
$manager = new ImageManager(new Driver());

// reading an animated gif
$image = $manager->read('images/animation.gif');

// discard the first 20 frames and read the following 10 frames as new animation
$image = $image->sliceAnimation(20, 10);