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https://github.com/jimeh/dlist.git
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- thumbnail support is fully functional with custom imageThumb class which supports caching and so on, the class is still considered beta (specially the clean_cache() function)
- updated simple template - added Last Access (atime) to dirlist.lib.php - updated and fixed loads of other things git-svn-id: file:///Users/jimeh/Desktop/dlist/trunk@18 a5845835-ea0f-0410-a762-dd0bfe9bfde8
This commit is contained in:
jim
203
libs/imagethumb.lib.php
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203
libs/imagethumb.lib.php
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<?php
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class imageThumb {
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/*
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Class: image v0.2 beta
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Copyright © 2006 Jim Myhrberg. All rights reserved.
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zynode@gmail.com
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*/
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// ==============================================
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// ----- [ Configuration ] ----------------------
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// ==============================================
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var $jpg_quality = 85;
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var $cache_dir = 'cache/images/';
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var $cache_validity = 60; // days
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var $clean_cache = 0; // hours
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var $output_format;
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var $src_file;
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var $image;
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var $type;
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var $last_modified;
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var $target_w;
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var $target_h;
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var $error = false;
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var $last_clean_file = 'imagethumb_cleanup';
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function imageThumb ($src=false) {
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if ( !empty($src) ) $this->load($src);
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}
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// ==============================================
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// ----- [ Public Functions ] -------------------
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// ==============================================
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function quick ($file, $width, $height, $quality=false) {
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if ( !$this->check_cache($file, $width, $height) ) {
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$this->load($file);
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if ( $this->error == false) {
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$this->resize($width, $height);
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if ( !empty($quality) ) $this->jpg_quality = $quality;
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$this->output();
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$this->save_to_cache();
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$this->destroy();
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}
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}
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$this->clean_cache();
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}
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function load ($file) {
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if ( is_readable($file) && preg_match("/.*\.(jpg|jpeg|png)/i", $file, $type) ) {
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$this->type = $type = $type[1];
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$this->image = ( $type == 'png' ) ? imagecreatefrompng($file) : imagecreatefromjpeg($file) ;
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$this->src_file = $file;
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$this->last_modified = filemtime($file);
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} else { $this->error = true; return false; }
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}
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function resize ($width=null, $height=null, $onlydown=true, $keepratio=true) {
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if ( $width != null || $height != null ) {
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$src_w = imageSX($this->image);
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$src_h = imageSY($this->image);
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if ( $width == null ) $width = 5000;
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if ( $height == null ) $height = 5000;
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$size = $this->resize_dimensions($src_w, $src_h, $width, $height, $onlydown, $keepratio);
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$image = imagecreatetruecolor($size['w'], $size['h']);
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imagecopyresampled($image, $this->image, 0, 0, 0, 0, $size['w'], $size['h'], $src_w, $src_h);
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$this->image = $image;
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$this->target_w = $width;
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$this->target_h = $height;
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}
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}
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function output ($file=null) {
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$type = ( empty($this->output_format) ) ? $this->type : $this->output_format ;
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if ( $type == 'png' ) {
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header('Content-type: image/png');
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header('Content-disposition: image; filename="'.basename($this->src_file).'"');
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( empty($file) ) ? imagepng($this->image) : imagepng($this->image, $file) ;
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} else {
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header('Content-type: image/jpeg');
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header('Content-disposition: image; filename="'.basename($this->src_file).'"');
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imagejpeg($this->image, $file, $this->jpg_quality);
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}
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}
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function destroy () {
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imagedestroy($this->image);
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}
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// Caching Functions
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function save_to_cache () {
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if ( !preg_match("/\/$/", $this->cache_dir) ) $this->cache_dir .= '/';
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if ( is_writable($this->cache_dir) ) {
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$filename = 'imgt_';
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$string = $this->src_file.$this->last_modified;
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if ( !empty($this->target_w) && !empty($this->target_h)) $string .= $this->target_w.$this->target_h;
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$filename .= md5($string);
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$filename .= '.'.$this->type;
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if( !file_exists($filename) ) {
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if ( $this->type == 'png' ) {
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imagepng($this->image, $this->cache_dir.$filename);
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} else {
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imagejpeg($this->image, $this->cache_dir.$filename);
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}
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}
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}
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}
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function check_cache ($file, $target_w=null, $target_h=null) {
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if ( is_readable($file) ) {
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$ext = preg_replace("/.*\.(.*)/", "$1", $file);
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$filename = 'imgt_';
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$string = $file.filemtime($file);
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if ( !empty($target_w) && !empty($target_h) ) $string .= $target_w.$target_h;
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$filename .= md5($string);
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$filename .= '.'.$ext;
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if ( is_readable($this->cache_dir.$filename) ) {
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( $ext == 'png' ) ? header('Content-type: image/png') : header('Content-type: image/jpeg');
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header('Content-disposition: image; filename="'.basename($this->src_file).'"');
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echo $this->rfile($this->cache_dir.$filename);
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return true;
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}
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}
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return false;
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}
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function clean_cache () {
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if ( is_readable($this->cache_dir.$this->last_clean_file) ) {
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$last_clean = $this->rfile($this->cache_dir.$this->last_clean_file);
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} else { $last_clean = 0; }
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$clean_cache = $this->clean_cache * 3600;
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$cache_validity = $this->cache_validity * 86400;
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if ( time() > ($last_clean + $clean_cache) ) {
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$this->write2file($this->cache_dir.$this->last_clean_file, time());
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$glob = glob($this->cache_dir.'*');
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foreach( $glob as $key => $value ) {
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if ( preg_match("/(?:.*\/|)(imgt_.*?\.(jpg|jpeg|png))/i", $value) && (fileatime($value) + $cache_validity) < time() ) {
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unlink($value);
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}
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}
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}
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}
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// ==============================================
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// ----- [ Internal Functions ] -----------------
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// ==============================================
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function rfile ($file){
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if (!isset($file)) return false;
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if (is_file($file)) {
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if (!($fh = fopen($file,'r'))) return false;
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$file_data = fread($fh, filesize($file));
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fclose($fh);
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} else { return false; }
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return $file_data;
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}
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function write2file($file, $string, $mode="wt", $lock=2){
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if ( !isset($file) ) return false;
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$fp = fopen($file, $mode);
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if ($fp != false) {
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flock($fp,$lock);
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$re = fwrite($fp,$string);
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$re2 = fclose($fp);
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if ($re != false && $re2 != false) return true;
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}
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return false;
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}
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function resize_dimensions ($src_w, $src_h, $w, $h, $onlydown=true, $keepratio=true) {
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$img_w = ( $w >= $src_w && $onlydown ) ? $src_w : $w ;
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$img_h = ( $h >= $src_h && $onlydown ) ? $src_h : $h ;
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if ( $keepratio ) {
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$ratio = $src_w / $src_h;
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if ( $ratio > ($img_w / $img_h) ) {
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$img_h = $src_h / ($src_w / $img_w);
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} elseif ( $ratio < ($img_w / $img_h) ) {
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$img_w = $src_w / ($src_h / $img_h);
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}
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}
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return array('w'=>$img_w, 'h'=>$img_h);
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}
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}
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?>
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