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79 lines
2.3 KiB
79 lines
2.3 KiB
2 months ago
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<?php
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class ImageResize extends \Gumlet\ImageResize {
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const K64 = 65536;
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const MB = 1048576;
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const TWEAKFACTOR = 2.75;
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const INCREASE_SEC = 10;
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private static $runCount = 0;
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protected $imageInfo;
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protected $memoryLimit;
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public function __construct($filename) {
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$this->imageInfo = getimagesize($filename);
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$this->memoryLimit = self::getMemory();
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$this->setMemory();
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self::$runCount++;
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self::setExecutionTime();
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parent::__construct($filename);
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}
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/**
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* Inspired by corey34 seen at https://github.com/gumlet/php-image-resize/issues/55#issuecomment-437035599
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*/
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public function setMemory() {
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if($this->memoryLimit == -1){
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return $this;
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} else {
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$w = max($this->imageInfo[0], $this->dest_w, $this->source_w, $this->original_w, 1);
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$h = max($this->imageInfo[1], $this->dest_h, $this->source_h, $this->original_h, 1);
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if (array_key_exists("channels", $this->imageInfo)) {
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$channels = $this->imageInfo['channels'];
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} else {
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$channels = 3;
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}
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$memoryNeeded = round(($w * $h * $this->imageInfo['bits'] * $channels / 8 + self::K64) * self::TWEAKFACTOR);
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$memoryUsage = memory_get_usage(true);
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$newLimit = $memoryUsage + $memoryNeeded;
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if ($newLimit > $this->memoryLimit) {
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$newLimit = ceil($newLimit / self::MB);
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ini_set( 'memory_limit', $newLimit . "M" );
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$this->memoryLimit = $newLimit;
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return $this;
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} else {
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return $this;
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}
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}
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}
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private static function setExecutionTime(){
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$val = (int)ini_get('max_execution_time');
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set_time_limit($val + self::$runCount * self::INCREASE_SEC);
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}
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private static function getMemory() {
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$val = ini_get('memory_limit');
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$val = trim($val);
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$last = strtolower($val[strlen($val)-1]);
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$val = (int)$val;
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switch($last) {
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// The 'G' modifier is available since PHP 5.1.0
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case 'g':
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$val *= 1024;
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case 'm':
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$val *= 1024;
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case 'k':
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$val *= 1024;
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}
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return $val;
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}
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}
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