<?php
// resize nexstorm.jpg from 794 x 552 to 640 x 445 to fit on screen
// Ken True - 25-Jul-2006 webmaster@saratoga-weather.org
// modified for cacheing of the image, 3-Aug-2006

    $Graphic = 'nexstorm.jpg';
	$new_width = 640;
	$new_height = 445;

if (isset($_REQUEST['sce']) and strtolower($_REQUEST['sce']) == 'view' ) {
   //--self downloader --
   $filenameReal = __FILE__;
   $download_size = filesize($filenameReal);
   header('Pragma: public');
   header('Cache-Control: private');
   header('Cache-Control: no-cache, must-revalidate');
   header("Content-type: text/plain");
   header("Accept-Ranges: bytes");
   header("Content-Length: $download_size");
   header('Connection: close');
   
   readfile($filenameReal);
   exit;
}	
	$Cache = preg_replace('|\.jpg|','-cache.jpg',$Graphic);
	$GraphicTime = filectime($Graphic);
	$CacheTime = filectime($Cache);

    if ($GraphicTime > $CacheTime) {
      $image = loadJPEG($Graphic);  // fetch our map image
	  $MaxX = imagesx($image);
	  $MaxY = imagesy($image);
	  $image_p = imagecreatetruecolor($new_width, $new_height);
      imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $MaxX, $MaxY);
      imagejpeg($image_p, $Cache, 90); 
      imagedestroy($image); 
      imagedestroy($image_p); 
	}
	
    if (file_exists($Cache)) {
	  header("Content-type: image/jpeg"); // now send to browser
	  readfile($Cache);
	}
	
    exit;


function loadJPEG ($imgname) { 
   $im = @imagecreatefromjpeg ($imgname); /* Attempt to open */ 
   if (!$im) { /* See if it failed */ 
       $im  = imagecreate (150, 30); /* Create a blank image */ 
       $bgc = imagecolorallocate ($im, 255, 255, 255); 
       $tc  = imagecolorallocate ($im, 0, 0, 0); 
       imagefilledrectangle ($im, 0, 0, 150, 30, $bgc); 
       /* Output an errmsg */ 
       imagestring ($im, 1, 5, 5, "Error loading $imgname", $tc); 
   } 
   return $im; 
} 

?>