ImageSizerEngineGDAlt.module.php

<?php namespace ProcessWire;

class ImageSizerEngineGDAlt extends ImageSizerEngineGD {

	public static function getModuleInfo() {
		return [
			'title' => 'GD Image Sizer (alternative version)',
			'version' => 1,
			'summary' => "Uses PHP’s built-in GD library to resize images (alternative version, see https://github.com/processwire/processwire-issues/issues/1154).",
		];
	}

	/**
	 * Check orientation (@horst)
	 *
	 * @param array
	 *
	 * @return bool
	 *
	 */
	protected function checkOrientation(&$correctionArray) {
		// first value is rotation-degree and second value is flip-mode: 0=NONE | 1=HORIZONTAL | 2=VERTICAL
		$corrections = array(
			'1' => array(0, 0),
			'2' => array(0, 1),
			'3' => array(180, 0),
			'4' => array(0, 2),
			'5' => array(90, 1),
			'6' => array(90, 0),
			'7' => array(270, 1),
			'8' => array(270, 0)
		);
		
		if(!isset($this->info['orientation']) || !isset($corrections[strval($this->info['orientation'])])) {
			return false;
		}
		
		$correctionArray = $corrections[strval($this->info['orientation'])];
		
		return true;
	}

}