cakephperize

cakephperize.php

<?php

declare(strict_types=1);

/**
 * (experimental)
 * cakephperize your icons 
 *
 * usage) 
 *   $ php cakephperize.php {file_url} {threshold}
 * example)  
 *   $ php cakephperize.php https://pbs.twimg.com/profile_images/1231114994550370304/bYwYKuJY_400x400.png 0.8
*/

const CAKEPHPER_BLUE =  '#006CF3';
const CAKEPHPER_BLACK =  '#000000';

$imageUrl = $argv[1] ?? null;
if ($imageUrl === null) {
    echo '画像URLを指定してください。ex) php cakephperize.php https://example.com/test.png 0.8' . PHP_EOL;
    exit(1);
}
$threshold = (float) ($argv[2] ?? 0.5);

$contents = file_get_contents($imageUrl);
if (!$contents) {
    echo "画像を読み込めません {$imageUrl}" . PHP_EOL;
    exit(1);
}

$img = new Imagick();

try {
    $img->readImageBlob($contents);
} catch (Exception $e) {
    echo "画像の読み込みに失敗しました {$imageUrl}" . PHP_EOL;
    exit(1);
}

$img->thresholdImage($threshold * Imagick::getQuantum());

$imageIterator = $img->getPixelIterator();
foreach ($imageIterator as $row => $pixels) {
    foreach ($pixels as $column => $pixel) {
        $newColor = (int) $pixel->getHSL()['luminosity'] === 0 ? CAKEPHPER_BLUE : CAKEPHPER_BLACK;
        $pixel->setColor($newColor);
    }
    $imageIterator->syncIterator();
}

$writeFileHandle = fopen(__DIR__ . '/cakephperized.png', 'w');
$img->writeImageFile($writeFileHandle);