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64 lines
1.6 KiB
PHP
64 lines
1.6 KiB
PHP
<?php
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namespace App\Util\Media;
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use App\Media;
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use App\Util\Blurhash\Blurhash as BlurhashEngine;
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class Blurhash
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{
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const DEFAULT_HASH = 'U4Rfzst8?bt7ogayj[j[~pfQ9Goe%Mj[WBay';
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public static function generate(Media $media, $path = false)
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{
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if (! in_array($media->mime, ['image/png', 'image/jpeg', 'image/jpg', 'video/mp4'])) {
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return self::DEFAULT_HASH;
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}
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if ($media->thumbnail_path == null) {
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return self::DEFAULT_HASH;
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}
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if ($path) {
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$file = $path;
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} else {
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$localFs = config('filesystems.default') === 'local';
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$file = storage_path('app/'.$media->thumbnail_path);
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}
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if (! is_file($file)) {
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return self::DEFAULT_HASH;
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}
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$image = imagecreatefromstring(file_get_contents($file));
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if (! $image) {
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return self::DEFAULT_HASH;
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}
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$width = imagesx($image);
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$height = imagesy($image);
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$pixels = [];
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for ($y = 0; $y < $height; $y++) {
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$row = [];
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for ($x = 0; $x < $width; $x++) {
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$index = imagecolorat($image, $x, $y);
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$colors = imagecolorsforindex($image, $index);
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$row[] = [$colors['red'], $colors['green'], $colors['blue']];
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}
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$pixels[] = $row;
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}
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imagedestroy($image);
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$components_x = 4;
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$components_y = 4;
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$blurhash = BlurhashEngine::encode($pixels, $components_x, $components_y);
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if (strlen($blurhash) > 191) {
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return self::DEFAULT_HASH;
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}
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return $blurhash;
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}
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}
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