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How to make TimThumb not resize images? (1 post)

  1. buttonedorg
    Member
    Posted 4 years ago #

    I'm using timthumb in one of my blogs, but if the image isn't 150x150, timthumb will automatically crop and resize images, which means they end up extremely ugly sometimes.

    Is there any way I can edit the code so that it only crops, but does not resize? Here's the code I'm currently using:

    <?php
    
    /*
    
    	TimThumb script created by Tim McDaniels and Darren Hoyt with tweaks by Ben Gillbanks
    
    	http://code.google.com/p/timthumb/
    
    	MIT License: http://www.opensource.org/licenses/mit-license.php
    
    	Paramters
    
    	---------
    
    	w: width
    
    	h: height
    
    	zc: zoom crop (0 or 1)
    
    	q: quality (default is 75 and max is 100)
    
    	HTML example: <img src="/scripts/timthumb.php?src=/images/whatever.jpg&w=150&h=200&zc=1" alt="" />
    
    */
    
    /*
    
    $sizeLimits = array(
    
    	"100x100",
    
    	"150x150",
    
    );
    
    */
    
    define ('CACHE_SIZE', 30);		// number of files to store before clearing cache
    
    define ('CACHE_CLEAR', 5);		// maximum number of files to delete on each cache clear
    
    define ('VERSION', '1.09');		// version number (to force a cache refresh
    
    $imageFilters = array(
    
    	"1" => array(IMG_FILTER_NEGATE, 0),
    
    	"2" => array(IMG_FILTER_GRAYSCALE, 0),
    
    	"3" => array(IMG_FILTER_BRIGHTNESS, 1),
    
    	"4" => array(IMG_FILTER_CONTRAST, 1),
    
    	"5" => array(IMG_FILTER_COLORIZE, 4),
    
    	"6" => array(IMG_FILTER_EDGEDETECT, 0),
    
    	"7" => array(IMG_FILTER_EMBOSS, 0),
    
    	"8" => array(IMG_FILTER_GAUSSIAN_BLUR, 0),
    
    	"9" => array(IMG_FILTER_SELECTIVE_BLUR, 0),
    
    	"10" => array(IMG_FILTER_MEAN_REMOVAL, 0),
    
    	"11" => array(IMG_FILTER_SMOOTH, 0),
    
    );
    
    // sort out image source
    
    $src = get_request("src", "");
    
    if($src == "" || strlen($src) <= 3) {
    
    	displayError("no image specified");
    
    }
    
    // clean params before use
    
    $src = cleanSource($src);
    
    // last modified time (for caching)
    
    $lastModified = filemtime($src);
    
    // get properties
    
    $new_width 		= preg_replace("/[^0-9]+/", "", get_request("w", 0));
    
    $new_height 	= preg_replace("/[^0-9]+/", "", get_request("h", 0));
    
    $zoom_crop 		= preg_replace("/[^0-9]+/", "", get_request("zc", 1));
    
    $quality 		= preg_replace("/[^0-9]+/", "", get_request("q", 80));
    
    $filters		= get_request("f", "");
    
    if ($new_width == 0 && $new_height == 0) {
    
    	$new_width = 100;
    
    	$new_height = 100;
    
    }
    
    // set path to cache directory (default is ./cache)
    
    // this can be changed to a different location
    
    $cache_dir = './cache';
    
    // get mime type of src
    
    $mime_type = mime_type($src);
    
    // check to see if this image is in the cache already
    
    check_cache( $cache_dir, $mime_type );
    
    // if not in cache then clear some space and generate a new file
    
    cleanCache();
    
    ini_set('memory_limit', "30M");
    
    // make sure that the src is gif/jpg/png
    
    if(!valid_src_mime_type($mime_type)) {
    
    	displayError("Invalid src mime type: " .$mime_type);
    
    }
    
    // check to see if GD function exist
    
    if(!function_exists('imagecreatetruecolor')) {
    
    	displayError("GD Library Error: imagecreatetruecolor does not exist");
    
    }
    
    if(strlen($src) && file_exists($src)) {
    
    	// open the existing image
    
    	$image = open_image($mime_type, $src);
    
    	if($image === false) {
    
    		displayError('Unable to open image : ' . $src);
    
    	}
    
    	// Get original width and height
    
    	$width = imagesx($image);
    
    	$height = imagesy($image);
    
    	// don't allow new width or height to be greater than the original
    
    	if( $new_width > $width ) {
    
    		$new_width = $width;
    
    	}
    
    	if( $new_height > $height ) {
    
    		$new_height = $height;
    
    	}
    
    	// generate new w/h if not provided
    
    	if( $new_width && !$new_height ) {
    
    		$new_height = $height * ( $new_width / $width );
    
    	} elseif($new_height && !$new_width) {
    
    		$new_width = $width * ( $new_height / $height );
    
    	} elseif(!$new_width && !$new_height) {
    
    		$new_width = $width;
    
    		$new_height = $height;
    
    	}
    
    	// create a new true color image
    
    	$canvas = imagecreatetruecolor( $new_width, $new_height );
    
    	imagealphablending($canvas, false);
    
    	// Create a new transparent color for image
    
    	$color = imagecolorallocatealpha($canvas, 0, 0, 0, 127);
    
    	// Completely fill the background of the new image with allocated color.
    
    	imagefill($canvas, 0, 0, $color);
    
    	// Restore transparency blending
    
    	imagesavealpha($canvas, true);
    
    	if( $zoom_crop ) {
    
    		$src_x = $src_y = 0;
    
    		$src_w = $width;
    
    		$src_h = $height;
    
    		$cmp_x = $width  / $new_width;
    
    		$cmp_y = $height / $new_height;
    
    		// calculate x or y coordinate and width or height of source
    
    		if ( $cmp_x > $cmp_y ) {
    
    			$src_w = round( ( $width / $cmp_x * $cmp_y ) );
    
    			$src_x = round( ( $width - ( $width / $cmp_x * $cmp_y ) ) / 2 );
    
    		} elseif ( $cmp_y > $cmp_x ) {
    
    			$src_h = round( ( $height / $cmp_y * $cmp_x ) );
    
    			$src_y = round( ( $height - ( $height / $cmp_y * $cmp_x ) ) / 2 );
    
    		}
    
    		imagecopyresampled( $canvas, $image, 0, 0, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h );
    
    	} else {
    
    		// copy and resize part of an image with resampling
    
    		imagecopyresampled( $canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height );
    
    	}
    
    	if ($filters != "") {
    
    		// apply filters to image
    
    		$filterList = explode("|", $filters);
    
    		foreach($filterList as $fl) {
    
    			$filterSettings = explode(",", $fl);
    
    			if(isset($imageFilters[$filterSettings[0]])) {
    
    				for($i = 0; $i < 4; $i ++) {
    
    					if(!isset($filterSettings[$i])) {
    
    						$filterSettings[$i] = null;
    
    					}
    
    				}
    
    				switch($imageFilters[$filterSettings[0]][1]) {
    
    					case 1:
    
    						imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1]);
    
    						break;
    
    					case 2:
    
    						imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2]);
    
    						break;
    
    					case 3:
    
    						imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3]);
    
    						break;
    
    					default:
    
    						imagefilter($canvas, $imageFilters[$filterSettings[0]][0]);
    
    						break;
    
    				}
    
    			}
    
    		}
    
    	}
    
    	// output image to browser based on mime type
    
    	show_image($mime_type, $canvas, $cache_dir);
    
    	// remove image from memory
    
    	imagedestroy($canvas);
    
    } else {
    
    	if(strlen($src)) {
    
    		displayError("image " . $src . " not found");
    
    	} else {
    
    		displayError("no source specified");
    
    	}
    
    }
    
    /**
    
     * 
    
     */
    
    function show_image($mime_type, $image_resized, $cache_dir) {
    
    	global $quality;
    
    	// check to see if we can write to the cache directory
    
    	$is_writable = 0;
    
    	$cache_file_name = $cache_dir . '/' . get_cache_file();
    
    	if(touch($cache_file_name)) {
    
    		// give 666 permissions so that the developer 
    
    		// can overwrite web server user
    
    		chmod($cache_file_name, 0666);
    
    		$is_writable = 1;
    
    	} else {
    
    		$cache_file_name = NULL;
    
    		header('Content-type: ' . $mime_type);
    
    	}
    
    	$quality = floor($quality * 0.09);
    
    	imagepng($image_resized, $cache_file_name, $quality);
    
    	if($is_writable) {
    
    		show_cache_file($cache_dir, $mime_type);
    
    	}
    
    	imagedestroy($image_resized);
    
    	displayError("error showing image");
    
    }
    
    /**
    
     * 
    
     */
    
    function get_request( $property, $default = 0 ) {
    
    	if( isset($_REQUEST[$property]) ) {
    
    		return $_REQUEST[$property];
    
    	} else {
    
    		return $default;
    
    	}
    
    }
    
    /**
    
     * 
    
     */
    
    function open_image($mime_type, $src) {
    
    	if(stristr($mime_type, 'gif')) {
    
    		$image = imagecreatefromgif($src);
    
    	} elseif(stristr($mime_type, 'jpeg')) {
    
    		@ini_set('gd.jpeg_ignore_warning', 1);
    
    		$image = imagecreatefromjpeg($src);
    
    	} elseif( stristr($mime_type, 'png')) {
    
    		$image = imagecreatefrompng($src);
    
    	}
    
    	return $image;
    
    }
    
    /**
    
     * clean out old files from the cache
    
     * you can change the number of files to store and to delete per loop in the defines at the top of the code
    
     */
    
    function cleanCache() {
    
    	$files = glob("cache/*", GLOB_BRACE);
    
    	$yesterday = time() - (24 * 60 * 60);
    
    	if (count($files) > 0) {
    
    		usort($files, "filemtime_compare");
    
    		$i = 0;
    
    		if (count($files) > CACHE_SIZE) {
    
    			foreach ($files as $file) {
    
    				$i ++;
    
    				if ($i >= CACHE_CLEAR) {
    
    					return;
    
    				}
    
    				if (filemtime($file) > $yesterday) {
    
    					return;
    
    				}
    
    				unlink($file);
    
    			}
    
    		}
    
    	}
    
    }
    
    /**
    
     * compare the file time of two files
    
     */
    
    function filemtime_compare($a, $b) {
    
    	return filemtime($a) - filemtime($b);
    
    }
    
    /**
    
     * determine the file mime type
    
     */
    
    function mime_type($file) {
    
    	if (stristr(PHP_OS, 'WIN')) { 
    
    		$os = 'WIN';
    
    	} else { 
    
    		$os = PHP_OS;
    
    	}
    
    	$mime_type = '';
    
    	if (function_exists('mime_content_type')) {
    
    		$mime_type = mime_content_type($file);
    
    	}
    
    	// use PECL fileinfo to determine mime type
    
    	if (!valid_src_mime_type($mime_type)) {
    
    		if (function_exists('finfo_open')) {
    
    			$finfo = finfo_open(FILEINFO_MIME);
    
    			$mime_type = finfo_file($finfo, $file);
    
    			finfo_close($finfo);
    
    		}
    
    	}
    
    	// try to determine mime type by using unix file command
    
    	// this should not be executed on windows
    
        if (!valid_src_mime_type($mime_type) && $os != "WIN") {
    
    		if (preg_match("/FREEBSD|LINUX/", $os)) {
    
    			$mime_type = trim(@shell_exec('file -bi "' . $file . '"'));
    
    		}
    
    	}
    
    	// use file's extension to determine mime type
    
    	if (!valid_src_mime_type($mime_type)) {
    
    		// set defaults
    
    		$mime_type = 'image/png';
    
    		// file details
    
    		$fileDetails = pathinfo($file);
    
    		$ext = strtolower($fileDetails["extension"]);
    
    		// mime types
    
    		$types = array(
    
     			'jpg'  => 'image/jpeg',
    
     			'jpeg' => 'image/jpeg',
    
     			'png'  => 'image/png',
    
     			'gif'  => 'image/gif'
    
     		);
    
    		if (strlen($ext) && strlen($types[$ext])) {
    
    			$mime_type = $types[$ext];
    
    		}
    
    	}
    
    	return $mime_type;
    
    }
    
    /**
    
     * 
    
     */
    
    function valid_src_mime_type($mime_type) {
    
    	if (preg_match("/jpg|jpeg|gif|png/i", $mime_type)) {
    
    		return true;
    
    	}
    
    	return false;
    
    }
    
    /**
    
     * 
    
     */
    
    function check_cache($cache_dir, $mime_type) {
    
    	// make sure cache dir exists
    
    	if (!file_exists($cache_dir)) {
    
    		// give 777 permissions so that developer can overwrite
    
    		// files created by web server user
    
    		mkdir($cache_dir);
    
    		chmod($cache_dir, 0777);
    
    	}
    
    	show_cache_file($cache_dir, $mime_type);
    
    }
    
    /**
    
     * 
    
     */
    
    function show_cache_file($cache_dir) {
    
    	$cache_file = $cache_dir . '/' . get_cache_file();
    
    	if (file_exists($cache_file)) {
    
    		$gmdate_mod = gmdate("D, d M Y H:i:s", filemtime($cache_file));
    
    		if(! strstr($gmdate_mod, "GMT")) {
    
    			$gmdate_mod .= " GMT";
    
    		}
    
    		if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
    
    			// check for updates
    
    			$if_modified_since = preg_replace("/;.*$/", "", $_SERVER["HTTP_IF_MODIFIED_SINCE"]);
    
    			if ($if_modified_since == $gmdate_mod) {
    
    				header("HTTP/1.1 304 Not Modified");
    
    				exit;
    
    			}
    
    		}
    
    		$fileSize = filesize($cache_file);
    
    		// send headers then display image
    
    		header("Content-Type: image/png");
    
    		header("Accept-Ranges: bytes");
    
    		header("Last-Modified: " . $gmdate_mod);
    
    		header("Content-Length: " . $fileSize);
    
    		header("Cache-Control: max-age=9999, must-revalidate");
    
    		header("Expires: " . $gmdate_mod);
    
    		readfile($cache_file);
    
    		exit;
    
    	}
    
    }
    
    /**
    
     * 
    
     */
    
    function get_cache_file() {
    
    	global $lastModified;
    
    	static $cache_file;
    
    	if(!$cache_file) {
    
    		$cachename = $_SERVER['QUERY_STRING'] . VERSION . $lastModified;
    
    		$cache_file = md5($cachename) . '.png';
    
    	}
    
    	return $cache_file;
    
    }
    
    /**
    
     * check to if the url is valid or not
    
     */
    
    function valid_extension ($ext) {
    
    	if (preg_match("/jpg|jpeg|png|gif/i", $ext)) {
    
    		return TRUE;
    
    	} else {
    
    		return FALSE;
    
    	}
    
    }
    
    /**
    
     * tidy up the image source url
    
     */
    
    function cleanSource($src) {
    
    	// remove slash from start of string
    
    	if(strpos($src, "/") == 0) {
    
    		$src = substr($src, -(strlen($src) - 1));
    
    	}
    
    	// remove http/ https/ ftp
    
    	$src = preg_replace("/^((ht|f)tp(s|):\/\/)/i", "", $src);
    
    	// remove domain name from the source url
    
    	$host = $_SERVER["HTTP_HOST"];
    
    	$src = str_replace($host, "", $src);
    
    	$host = str_replace("www.", "", $host);
    
    	$src = str_replace($host, "", $src);
    
    	// don't allow users the ability to use '../' 
    
    	// in order to gain access to files below document root
    
    	// src should be specified relative to document root like:
    
    	// src=images/img.jpg or src=/images/img.jpg
    
    	// not like:
    
    	// src=../images/img.jpg
    
    	$src = preg_replace("/\.\.+\//", "", $src);
    
    	// get path to image on file system
    
    	$src = get_document_root($src) . '/' . $src;	
    
    	return $src;
    
    }
    
    /**
    
     * 
    
     */
    
    function get_document_root ($src) {
    
    	// check for unix servers
    
    	if(@file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $src)) {
    
    		return $_SERVER['DOCUMENT_ROOT'];
    
    	}
    
    	// check from script filename (to get all directories to timthumb location)
    
    	$parts = array_diff(explode('/', $_SERVER['SCRIPT_FILENAME']), explode('/', $_SERVER['DOCUMENT_ROOT']));
    
    	$path = $_SERVER['DOCUMENT_ROOT'] . '/';
    
    	foreach ($parts as $part) {
    
    		$path .= $part . '/';
    
    		if (file_exists($path . $src)) {
    
    			return $path;
    
    		}
    
    	}	
    
    	// the relative paths below are useful if timthumb is moved outside of document root
    
    	// specifically if installed in wordpress themes like mimbo pro:
    
    	// /wp-content/themes/mimbopro/scripts/timthumb.php
    
    	$paths = array(
    
    		".",
    
    		"..",
    
    		"../..",
    
    		"../../..",
    
    		"../../../..",
    
    		"../../../../.."
    
    	);
    
    	foreach($paths as $path) {
    
    		if(@file_exists($path . '/' . $src)) {
    
    			return $path;
    
    		}
    
    	}
    
    	// special check for microsoft servers
    
    	if(!isset($_SERVER['DOCUMENT_ROOT'])) {
    
        	$path = str_replace("/", "\\", $_SERVER['ORIG_PATH_INFO']);
    
        	$path = str_replace($path, "", $_SERVER['SCRIPT_FILENAME']);
    
        	if( @file_exists( $path . '/' . $src ) ) {
    
        		return $path;
    
        	}
    
    	}	
    
    	displayError('file not found ' . $src);
    
    }
    
    /**
    
     * generic error message
    
     */
    
    function displayError($errorString = '') {
    
    	header('HTTP/1.1 400 Bad Request');
    
    	die($errorString);
    
    }
    
    ?>

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