--- /dev/null
+<?php
+
+function getPreview($imgFile, $maxSize = THUMB_SIZE)
+{
+ # example: data/myalbum/100.mypic.jpg
+ $newImgFile = DATA_DIR."/".dirname($imgFile)."/".$maxSize.".".basename($imgFile);
+
+ # if the preview is a symlink, image is already good sized
+ if (is_link($newImgFile)) return $imgFile;
+
+ if (! is_file($newImgFile))
+ {
+ # this tels the template to flush output after displaying previews
+ $GLOBALS["generating"] = true;
+
+ # reset script time limit to 20s (wont work in safe mode)
+ set_time_limit(20);
+
+ $ext = strtolower(substr($imgFile, -4));
+ if ($ext == ".jpg")
+ $img = imagecreatefromjpeg($imgFile);
+ else
+ $img = imagecreatefrompng($imgFile);
+
+ $w = imagesx($img);
+ $h = imagesy($img);
+ # if the image is already small, make a symlink, and return it
+ if ($w <= $maxSize and $h <= $maxSize) {
+ imagedestroy($img);
+ symlink($imgFile, $newImgFile);
+ return $imgFile;
+ }
+
+ # config to allow group writable files
+ umask(DATA_UMASK);
+ # create the thumbs directory recursively
+ if (! is_dir(dirname($newImgFile))) mkdir(dirname($newImgFile), 0777, true);
+
+ //if ($w > $h) {
+ // $newW = $maxSize;
+ // $newH = $h/($w/$maxSize);
+ //} else {
+ $newW = $w/($h/$maxSize);
+ $newH = $maxSize;
+ //}
+
+ $newImg = imagecreatetruecolor($newW, $newH);
+
+ imagecopyresampled($newImg, $img, 0, 0, 0, 0, $newW, $newH, $w, $h);
+
+ if ($ext == ".jpg")
+ imagejpeg($newImg, $newImgFile);
+ else
+ imagepng($newImg, $newImgFile);
+
+ imagedestroy($img);
+ imagedestroy($newImg);
+ }
+
+ return $newImgFile;
+}
+
+
+?>