Image

Rotate

rotate() turns an image and expands the canvas to keep every corner.

Example

Source: 768 x 432 Result: 882 x 759
Landscape source Image rotated 30 degrees 
<?php

use Alto\Image\Image;

Image::open('source-landscape.png')
    ->rotate(30, background: '#00b7ff')
    ->save('rotate.png');

Options

Option Default Use
degrees required Clockwise angle
background transparent Exposed canvas colour

Edge cases

  • Angles are normalized between 0 and 360 degrees.
  • Quarter turns swap width and height when needed.
  • Other angles enlarge both axes.
  • The angle must be finite.

Driver support

GD is exact. Imagick is exact for quarter turns and approximate for other angles.