include/libs/template_lite/plugins/function.resize_image.php

   1 <?/**
   2  * Template-Lite {resize_image} function plugin Using Image Magic
   3  *
   4  * Type:     function
   5  * Name:     resize_image
   6  * Purpose:  Outputs resized image  based on values passed.
   7  * Input:
   8  *                      - img_src tag path
   9  *                      - directory = full directory path where images are located
  10  *                      - thumbdir = Optional directory path to store thumbnail images.  directory will be used if not supplied.
  11  *                      - filename = Name of the file
  12  *                      - xscale = Image max width size default 2000 px
  13  *                      - yscale = Image max height size default 2000 px
  14  *                      - thumbname = prefix name for new image, the thumb name is not needed if you are using a return type of 1
  15  *                      - returntype =  1 - return image tag with full size image name and path but with height and width attributes adjusted
  16  *                                                      0 - resize image and store thumbnail in directory and return that thumbnail img tag.  Default setting
  17  *                      - url = Optional URL to download image from for resizing if the image doesn't exist in the image directory (CURL must be installed to use this feature)
  18  *                      - binpath = Optional path to the ImageMagick mogrify command.  If missing slower GD code will be used.
  19  *                      - alt = Optional alt attribute for the img tag Default is "image"
  20  *                      - border = Optional border attribute for img tag Default is 0
  21  *                      - class = Optional class attribute for img tag
  22  *                      - daystokeep = Optional number of days to cache the thumbnail image.  Default is 5 days
  23  *
  24  * Examples:<br>
  25  * <pre>
  26  * {resize_image img_src="/thumbnails/" directory="/html/mysite/ad_images/" thumbdir="/html/mysite/thumbnails/" filename="Myfile.jpg" xscale="150" yscale="200" thumbname="thumb_"}
  27  * </pre>
  28  *
  29  * Output <img src="/thumbnails/thumb_Myfile.jpg" width="150" height="200" alt="image" border="0">
  30  *
  31  * Author:   Rick Thomson rick@oznet.com
  32  * Author:   Mark Dickenson akapanamajack@sourceforge.net
  33 */
  34
  35 // Calculate percentage between width and height
  36 function tpl_function_resize_percent($maximum, $current)
  37 {
  38         return (real)(100 * ($maximum / $current));
  39 }
  40
  41 function tpl_function_resize_unpercent($percent, $whole)
  42 {
  43         return (real)(($percent * $whole) / 100);
  44 }
  45
  46 function tpl_function_resize_image($params, &$tpl)
  47 {
  48         extract($params);
  49
  50         if (empty($directory))
  51         {
  52                 throw new Template_Exception("resize_image: missing 'directory' parameter", $tpl);
  53         }
  54
  55         if (empty($thumbdir))
  56         {
  57                 $thumbdir = $directory;
  58         }
  59
  60         if (empty($filename))
  61         {
  62                 throw new Template_Exception("resize_image: missing 'filename' parameter", $tpl);
  63         }
  64
  65         if (empty($xscale))
  66         {
  67                 $xscale = 2000;
  68         }
  69         $maximagewidth=$xscale;
  70
  71         if (empty($xscale))
  72         {
  73                 $yscale = 2000;
  74         }
  75         $maximageheight=$yscale;
  76
  77         if (empty($alt))
  78         {
  79                 $alt = "image";
  80         }
  81
  82         if (empty($border))
  83         {
  84                 $border = 0;
  85         }
  86
  87         if (empty($daystokeep))
  88         {
  89                 $daystokeep = 5;
  90         }
  91
  92         if (!function_exists('gd_info'))
  93         {
  94                 throw new Template_Exception("resize_image: the GD library is not installed", $tpl);
  95         }
  96
  97         if(!file_exists($directory . $filename) && !empty($url) && function_exists('curl_init'))
  98         {
  99                 $ch = curl_init ($url . $filename);
 100                 $fp = fopen ($directory . $filename, "w");
 101                 curl_setopt ($ch, CURLOPT_FILE, $fp);
 102                 curl_setopt ($ch, CURLOPT_HEADER, 0);
 103                 curl_exec ($ch);
 104                 curl_close ($ch);
 105                 fclose ($fp);
 106         }
 107
 108         if(file_exists($directory . $filename))
 109         {
 110                 $imageinfo = @getimagesize($directory . $filename);
 111                 if(empty($imageinfo))
 112                 {
 113                         return;
 114                 }
 115
 116                 if ($returntype == 1)
 117                 {
 118                         $imagewidth = $imageinfo[0];
 119                         $imageheight = $imageinfo[1];
 120
 121                         if($maximagewidth < $imagewidth) {
 122                                 $imageheight = tpl_function_resize_unpercent(tpl_function_resize_percent($maximagewidth, $imagewidth), $imageheight);
 123                                 $imagewidth = $maximagewidth;
 124                         }
 125
 126                         if($maximageheight < $imageheight) {
 127                                 $imagewidth = tpl_function_resize_unpercent(tpl_function_resize_percent($maximageheight, $imageheight), $imagewidth);
 128                                 $imageheight = $maximageheight;
 129                         }
 130                         return "<img " . $class . " src=\"" . $img_src . $filename . "\" width=\"" . $imagewidth . "\" height=\"" . $imageheight . "\" alt=\"" . $alt . "\" border=\"" . $border . "\">";
 131                 }
 132
 133                 if (empty($thumbname))
 134                 {
 135                         throw new Template_Exception("resize_image: missing 'thumbname' parameter", $tpl);
 136                 }
 137
 138                 $now=urlencode(date("F j, Y, g:i a"));
 139
 140                 $newimagepath = $thumbdir . $thumbname . $filename;
 141
 142                 $newthumbnail = 0;
 143                 if(!file_exists($newimagepath))
 144                 {
 145                         copy($directory . $filename, $newimagepath);
 146                         $newthumbnail = 1;
 147                 }
 148
 149                 $datechanged = date("j", time()) - date("j", filemtime($newimagepath));
 150                 if(($datechanged > -$daystokeep && $datechanged < $daystokeep) && $newthumbnail = 0)
 151                 {
 152                         // Do not rebuild
 153                         $imagewidth = $imageinfo[0];
 154                         $imageheight = $imageinfo[1];
 155
 156                         if($maximagewidth < $imagewidth)
 157                         {
 158                                 $imageheight = tpl_function_resize_unpercent(tpl_function_resize_percent($maximagewidth, $imagewidth), $imageheight);
 159                                 $imagewidth = $maximagewidth;
 160                         }
 161
 162                         if($maximageheight < $imageheight)
 163                         {
 164                                 $imagewidth = tpl_function_resize_unpercent(tpl_function_resize_percent($maximageheight, $imageheight), $imagewidth);
 165                                 $imageheight = $maximageheight;
 166                         }
 167                 }
 168                 else
 169                 {
 170                         // rebuild
 171                         copy($directory . $filename, $newimagepath);
 172
 173                         $imagewidth = $imageinfo[0];
 174                         $imageheight = $imageinfo[1];
 175
 176                         if($maximagewidth < $imagewidth)
 177                         {
 178                                 $imageheight = tpl_function_resize_unpercent(tpl_function_resize_percent($maximagewidth, $imagewidth), $imageheight);
 179                                 $imagewidth = $maximagewidth;
 180                         }
 181
 182                         if($maximageheight < $imageheight)
 183                         {
 184                                 $imagewidth = tpl_function_resize_unpercent(tpl_function_resize_percent($maximageheight, $imageheight), $imagewidth);
 185                                 $imageheight = $maximageheight;
 186                         }
 187                         $imagewidth = round($imagewidth);
 188                         $imageheight = round($imageheight);
 189                         $scale = $imagewidth . "x" . $imageheight . "!";
 190
 191                         if (empty($binpath))
 192                         {
 193                                 if($imageinfo[2] == 1)
 194                                 {
 195                                         $sourceimage = imagecreatefromgif($directory . $filename);
 196                                 }
 197                                 elseif($imageinfo[2] == 2)
 198                                 {
 199                                         $sourceimage = imagecreatefromjpeg($directory . $filename);
 200                                 }
 201                                 elseif($imageinfo[2] == 3)
 202                                 {
 203                                         $sourceimage = imagecreatefrompng($directory . $filename);
 204                                 }
 205
 206                                 $destinationimage = imagecreatetruecolor($imagewidth, $imageheight);
 207                                 imagecopyresized($destinationimage, $sourceimage, 0, 0, 0, 0, $imagewidth, $imageheight, $imageinfo[0], $imageinfo[1]);
 208                                 if($imageinfo[2] == 1)
 209                                 {
 210                                         imagegif($destinationimage, $newimagepath);
 211                                 }
 212                                 elseif($imageinfo[2] == 2)
 213                                 {
 214                                         imageJPEG($destinationimage, $newimagepath, 75);
 215                                 }
 216                                 elseif($imageinfo[2] == 3)
 217                                 {
 218                                         imagepng($destinationimage, $newimagepath);
 219                                 }
 220                                 imagedestroy($sourceimage);
 221                                 imagedestroy($destinationimage);
 222                         }
 223                         else
 224                         {
 225                                 if ($imageinfo[2] == 2)
 226                                 {
 227                                         system( $binpath . "mogrify  -quality 75 -geometry $scale $newimagepath");
 228                                 }
 229                                 else
 230                                 {
 231                                         system( $binpath . "mogrify  -geometry $scale $newimagepath");
 232                                 }
 233                         }
 234                 }
 235
 236                 return "<img " . $class . " src=\"" . $img_src . $thumbname . $filename . "?" . $now . "\" width=\"" . $imagewidth . "\" height=\"" . $imageheight . "\" alt=\"" . $alt . "\" border=\"" . $border . "\">";
 237         }
 238 }
 239 ?>