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<?php |
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/** |
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* This file is part of the Cecil/Cecil package. |
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* |
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* Copyright (c) Arnaud Ligny <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Cecil\Assets; |
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use Cecil\Assets\Image\Optimizers\Cwebp; |
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use Intervention\Image\ImageManagerStatic as ImageManager; |
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use Spatie\ImageOptimizer\OptimizerChain; |
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use Spatie\ImageOptimizer\Optimizers\Gifsicle; |
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use Spatie\ImageOptimizer\Optimizers\Jpegoptim; |
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use Spatie\ImageOptimizer\Optimizers\Optipng; |
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use Spatie\ImageOptimizer\Optimizers\Pngquant; |
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use Spatie\ImageOptimizer\Optimizers\Svgo; |
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class Image |
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{ |
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/** |
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* Image Optimizer Chain. |
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*/ |
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public static function optimizer(int $quality): OptimizerChain |
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{ |
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return (new OptimizerChain()) |
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->addOptimizer(new Jpegoptim([ |
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"--max=$quality", |
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'--strip-all', |
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'--all-progressive', |
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])) |
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->addOptimizer(new Pngquant([ |
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"--quality=$quality", |
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'--force', |
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'--skip-if-larger', |
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])) |
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->addOptimizer(new Optipng([ |
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'-i0', |
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'-o2', |
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'-quiet', |
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])) |
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->addOptimizer(new Svgo([ |
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'--disable={cleanupIDs,removeViewBox}', |
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])) |
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->addOptimizer(new Gifsicle([ |
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'-b', |
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'-O3', |
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])) |
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->addOptimizer(new Cwebp([ |
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'-m 6', |
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'-pass 10', |
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'-mt', |
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'-q $quality', |
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])); |
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} |
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/** |
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* Build the `srcset` attribute for responsive images. |
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* ie: srcset="/img-480.jpg 480w, /img-800.jpg 800w". |
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*/ |
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public static function buildSrcset(Asset $asset, array $widths): string |
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{ |
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$srcset = ''; |
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foreach ($widths as $width) { |
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if ($width > $asset->getWidth() || $width > max($widths)) { |
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break; |
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} |
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$a = clone $asset; |
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$img = $a->resize($width); |
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$srcset .= sprintf('%s %sw, ', $img, $width); |
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unset($a); |
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} |
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rtrim($srcset, ', '); |
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// add reference image |
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if (!empty($srcset)) { |
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$srcset .= sprintf('%s %sw', (string) $asset, $asset->getWidth()); |
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} |
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return $srcset; |
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} |
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/** |
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* Converts an asset image to WebP. |
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*/ |
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public static function convertTopWebp(Asset $asset, int $quality): Asset |
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{ |
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$assetWebp = clone $asset; |
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$format = 'webp'; |
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$image = ImageManager::make($assetWebp['content']); |
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$assetWebp['content'] = (string) $image->encode($format, $quality); |
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$assetWebp['path'] = preg_replace('/\.'.$asset['ext'].'$/m', ".$format", $asset['path']); |
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$assetWebp['ext'] = $format; |
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return $assetWebp; |
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} |
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/** |
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* Tests if an asset is an animated gif. |
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*/ |
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public static function isAnimatedGif(Asset $asset): bool |
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{ |
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// an animated gif contains multiple "frames", with each frame having a header made up of: |
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// * a static 4-byte sequence (\x00\x21\xF9\x04) |
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// * 4 variable bytes |
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// * a static 2-byte sequence (\x00\x2C) |
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$count = preg_match_all('#\x00\x21\xF9\x04.{4}\x00[\x2C\x21]#s', (string) $asset['content_source']); |
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return $count > 1; |
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} |
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} |
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Cecilapp /
Cecil
