Grommet Image Resizer

A PHP library for resizing images

Build status

Usage

Resizing

$resizer = new \Grommet\ImageResizer\Resizer('/path/to/images', '/path/to/save');
$newPath = $resizer->resize('in.jpg', 'out.jpg', ['strategy' => 'fit', 'width' => 100]);
// $newPath = '/path/to/save/out.jpg'

Generating URLs to assets

$urlGen = new \Grommet\ImageResizer\UrlGenerator('https://cdn.site.com/media');
$url = $urlGen->imageUrl('i/image.jpg', ['strategy' => 'fit', 'width' => 100]);
// $url = 'https://cdn.site.com/media/fit_w-100/i/image.jpg'

Resize presets

$presets = [
    'small' => [
        'width' => 293,
        'height' => 219
    ],
    'large' => [
        'strategy' = 'crop',
        'width' => 500,
        'height' => 500
    ]
];

/* urls */
$urlGen = new \Grommet\ImageResizer\UrlGenerator('https://cdn.site.com/media', $presets);
$url = $urlGen->imageUrl('i/image.jpg', ['size' => 'small']);
// $url = 'https://cdn.site.com/media/fit_w-293_h-219/i/image.jpg'

/* files */
$resizer = new \Grommet\ImageResizer\PresetResizer(
    '/path/to/images',
    '/path/to/save',
    $presets
);
$newPath = $resizer->resize('image.jpg', 'large');
// $newPath = '/path/to/save/crop_w-500_h-500_m-c/image.jpg'

Resizing service

$urlResizer = new \Grommet\ImageResizer\UrlResizer(
    '/path/to/images',
    '/path/to/save',
    'https://cdn.site.com/media'
);

// incoming request for a resized image
$url = 'https://cdn.site.com/media/fit_w-100/i/image.jpg';
$newPath = $urlResizer->resize($url);
// $newPath = '/path/to/save/fit_w-100/i/image.jpg'

header('Content-Type: image/jpeg');
$resource = imagecreatefromjpeg($newPath);
imagejpeg($resource);  // output to browser
imagedestroy($resource);

Resize Strategies

Strategy	Description
exact	Resize to exact width and height. Aspect ratio will not be maintained.
fit	Resize to fit the specified width and height, maintaining aspect ratio.
fill	Resize to fit the specified bounds while maintaining the aspect ratio. Image will be padded with empty space with color in background.
crop	Crop an image to the exact size specified. Optionally specify cropMode.
optimize	Save the image at the existing dimensions while reducing quality and file size. Optionally specify quality.

Resize Adapters

By default, the resizer will use PHP's GD2 functions to resize the images. You may specify a different image resize adapter to and offload that work to a 3rd party.

Kraken.io

Use Kraken's image resizing service once you have an account and API access:

$resizer = new \Grommet\ImageResizer\Resizer(
    '/path/to/images',
    '/path/to/save',
    'kraken',
    ['api-key', 'api-secret']
);
$newPath = $resizer->resize('in.jpg', 'out.jpg', ['strategy' => 'fit', 'w' => 100, 'h' => 50]);
// $newPath = '/path/to/save/out.jpg'

Running tests

composer test

Code style & fix

# sniff src folder
composer fmt-check

# fix src folder
composer fmt