ImageCropper.php

<?php
/*
 * Image cropper Yii Extension.
 * Created By Firas I. Kassem. phiras@gmail.com , http://twitter.com/fiso
 *
*/

class ImageCropper{
	
	public function init() {}
	
	function resize_and_crop($src_path, $dst_path, $width, $height, $quality=90){	
		$info = getimagesize($src_path);
		$src_original_width = $info[0];
		$src_original_height = $info[1];
		$mime = $info['mime'];
		
		$type = substr(strrchr($mime, '/'), 1);
		
		switch ($type)
		{
			case 'jpeg':
				$image_create_func = 'ImageCreateFromJPEG';
				break;
			case 'png':
				$image_create_func = 'ImageCreateFromPNG';
				break;
			case 'bmp':
				$image_create_func = 'ImageCreateFromBMP';
				break;
			case 'gif':
				$image_create_func = 'ImageCreateFromGIF';
				break;
			default:
				$image_create_func = 'ImageCreateFromJPEG';
		}
		
		$width_ratio = $src_original_width/$width;
		$height_ratio = $src_original_height/$height;
	
		$percent = $width/$height;

		if($height_ratio < $width_ratio ){
			$target_height = $src_original_height;
			$target_width = $src_original_height * $percent;
		}else{
			$target_width = $src_original_width;
			$target_height = $src_original_width / $percent;
		}
		Yii::trace("target width : $target_width, target height : $target_height, type: $type, mime: $mime", "com.gameslider.imagecropper");
		Yii::trace("width : $width, height : $height", "com.gameslider.imagecropper" );
		
		$image_p = imagecreatetruecolor($width, $height);
		$image = $image_create_func($src_path);
		
		imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $target_width , $target_height);
		imagejpeg($image_p, $dst_path, $quality);
	}
}